Removal of refractory organic and inorganic load from gray ship wastewater by the electro-oxidation process
November 2024
In this work, electro-oxidation which is one of the innovative and efficient processes was used to treat gray and fatty wastewater (oil residues) from ships. These wastewaters contain heavy metals and persistent organic pollutants that damage the marine environment, contaminate the food chain, and harm marine life. This project aimed to apply the electro-oxidation process for the treatment of gray wastewater from ships...
Environmental management policies, practices and compliance with National and International Standards in the Eastern Industrial Park, Dukem Town, Ethiopia
January 2024
An environmental policy is a written statement describing an organization’s mission in relation to environmental impacts of its operational activities. However, many industries of developing country fail to implement their environmental policy. The problem also manifested in certain industrial parks of Ethiopia. Hence, this study intended to examine environmental management policies, practices and compliance in...
Seasonal variation of the water quality of Dal Lake and its tributaries in Srinagar city, Kashmir valley, India
August 2023
This paper presents a study on the spatial and seasonal/temporal variation of the water quality of Dal Lake and its tributaries based on some physicochemical parameters (temperature, pH, EC, TDS, NH3-N, total phosphorus, PO43-, Na+, K+, COD, DO, BOD, oil and grease, Ca2+, Mg2+, total hardness, SO42) and heavy metals (Cu, Fe, Mn, Pb, Cd, Zn, and As). Four inlets (Botkoul, Telbal Nallah, Pishpav Nallah, and Nallah Meerek...
Mercury pollution in Africa: A review
November 2022
Since the Minamata conference, the scientific and professional worlds (gold industry, metal extraction, health) have come together to conduct research and raise awareness of the effects of mercury (Hg) in the environment, particularly on public health. Africa has not remained on the sidelines of these events, which have a planetary scope due to the long-range transport of various anthropogenic and natural sources of...
Evaluation of heavy metals on soil microflora diversity in Robertkiri, Idama and Jokka in Niger Delta Area of Nigeria
June 2022
The increase in the population and industrial growth has led to increased production of industrial and domestic waste, which contains heavy metals in different forms, hence affect the diversity and activities of soil microflora and environmental sustainability. This research was aimed at evaluating the heavy metals on soil microflora diversity in soils of Robertkiri, Idama and Jokka in Akuku-Toru Local Government Area...
Profiling the surface water around Odeama Community of the Niger Delta area of Nigeria
May 2022
Surface water quality in Niger Delta has been impaired over the years as a result of oil exploration and exploitation carried out in the region. This study investigates the anthropogenic influence on the water quality of Odeama creek. Water samples were collected during the wet and dry season from 20 sampling points and four control points and analyzed following standard methods and procedures. No statistical difference...
Trace metal pollution in the environment: A comparison of the bio-indicator concept in three bivalves
March 2022
Three bivalves from the coast of Ghana: Crassostrea tulipa (n = 275), Anadara (Senilia) senilis (n = 310), from two ‘open’ lagoons (Benya and Ningo) and a ‘closed’ lagoon (Sakumo), and Perna perna (n = 155), from rocky shores adjacent to Benya and Sakumo, were analyzed for their total Cu, Zn, Fe, Mn, Cd and Hg concentrations and total body burden/load. The analyses were based on three-size class...
Histological and cytotoxic evaluation of Carica papaya seed oil and its potential biodiesel feedstock
December 2021
Carica papaya is a fruit known for its great economic values in tropical Africa due to its diverse industrial, medicinal and nutritional benefits. In this study, oil was extracted from dried powdered C. papaya seeds using n-hexane as extraction solvent. The physiochemical characterization of C. papaya seed oil extract was investigated using AOAC standard procedures. Acute toxicity test was carried out to determine the...
Assessment of transition metal oxides, post transition metal oxides in suspended or settled dust particles by wavelength dispersive X-rays fluorescence (WD-XRF)
November 2021
Settled dust or suspended particles of dust in air contains transition and post-transition metal oxides like Chromium oxide {Cr2O3}, Manganese oxide {MnO}, Nickel oxide {NiO}, Copper oxide {CuO}, Zinc oxide {ZnO}, Titanium oxide {TiO2}, Iron oxide {Fe2O3}, Zirconium oxide {ZrO2}, Lead oxide {PbO} and Aluminum oxide {Al2O3} and the study was carried out to find out the composition of these metallic oxides and the...
Potential for anaerobic digestion by incubation and anaerobic fermentation of landfill waste: A case of the city of Lomé (Togo)
July 2021
The objective of this work is to determine the methanogenic potential of landfill waste. To do this, two types of tests were carried out. The first one is the pre-test of anaerobic digestion by incubation carried out in a 500 mL flask in which 50 g of waste is placed in contact with 350 mL of water and the second one is the pre-test of the anaerobic digestion by fermentation also carried out under the same conditions as...
Physicochemical and bacteriological analysis of the quality of sachet water and their source point (spring box) consumed in Bo city, Sierra Leone
March 2021
This study was conducted to assess the physical, chemical, and bacteriological parameters of five- brand of sachet water, and their source point consumed in Bo city, southern Sierra Leone. The physical parameters include: pH, temperature, turbidity, total dissolved solid, and conductivity; chemical parameters include: Residual Chlorine, Magnesium, Potassium, Nitrite, Ammonia; and bacteriological parameters include:...
Health risk assessment of pesticide residues in bean samples from Wukari, Taraba State, Nigeria
February 2021
Man depends heavily on pesticides to boost his agricultural productions. This study aimed at carrying out a risk assessment of pesticide residues in samples of beans stored and sold in Wukari Town, Nigeria. Different samples of beans were collected randomly from different market points within Wukari, Rafin kada and Idofi. The pesticide residue analysis was carried out using GC/MS after sample extraction, filtration and...
Organochlorine pesticides: The culprit behind chronic kidney disease of unknown origin
December 2020
Incidence of chronic kidney disease of unknown etiology (CKDu) has emerged in South Asia and sub-Saharan Africa over last few years. CKDu is not attributed to diabetes, hypertension or other known causes of CKD. It affects younger individuals and is usually asymptomatic till advanced stages. Organochlorine pesticides (OCPs) are one of the proposed etiologies of CKDu. The present study was done to evaluate the serum...
Determination of Heavy Metals in Wastewater and Their Toxicological Implications around Eastern Industrial Zone, Central Ethiopia
November 2020
The purpose of this study was to determine the concentration and toxicological implications of heavy metals (Cr, Cd Zn, Fe, Pb and Cu) in effluents coming out Eastern Industrial Zone (EIZ). Wastewater samples were collected from three points (0, 200 and 500 m) from discharge point was collected with three replications. The wet digestion procedure was employed to solubilize the metals from the collected samples. The...
Heavy metals in children’s toys and baby items commonly sold in Trinidad and Tobago
June 2020
Children’s toys and baby items are a unique source of exposure to heavy metals in young children. It is a global health concern because of the potential risk heavy metals pose during the early years of childhood development. This study assessed the levels of six heavy metals (lead (Pb), manganese (Mn), nickel (Ni), chromium (Cr), cadmium (Cd) and copper (Cu)) in eleven toys and seven baby items currently sold in...
Analysis of heavy metal concentration in auto-mechanic dumpsites in Makurdi Metropolis, North Central Nigeria
June 2020
This research was carried out to assess heavy metals pollution in Makurdi auto-mechanic dumpsites in Kanshio (K), Northbank (NB) and Wadata (W). Atomic absorption spectrophotometer (PG990) was used to determine the heavy metals concentration. Results of the mean heavy metals concentrations (Cd, Cu, Pb and Zn) were found to be K (4.65, 137.12, 257.77 and 294.75), NB (1.97, 65.67, 162.88 and 223.23), and W (2.92, 85.27,...
Bioaccumulation of heavy metals in mangoes (Mangifera indica L.) found in the vicinity of gold mining sites of Zamfara State, Nigeria
May 2020
The impact of gold mining on mango (Mangifera indica L.) grown in the vicinity of gold mining sites in Zamfara State, Nigeria have been assessed over the dry and wet seasons. Samples of mango plant parts were collected from 3 impacted sites and a control site monthly between March and August 2014, and analysed for selected heavy metals using Atomic Absorption Spectrophotometer. The results obtained indicate that Pb was...
Level and ecological risk assessment of heavy metals in old landfill in Bayelsa state, Nigeria
May 2020
This study assessed the ecological fate of heavy metals within the vicinity of an area formally used as dump site in Igbogene, Bayelsa state. Soil auger was used to collect samples at 0 - 20 cm depth at 50, 100 and 150 m distances from the four cardinal points viz: North east and west and south east and west. The soil samples were sieved, ashed, digested and analyzed using atomic adsorption spectrometry. The heavy...
Seasonal assessment of the physico-chemical properties of surface water and sediments in the vicinity of a scrap metal recycling industry in Southwestern Nigeria
March 2020
The study assessed the seasonal variations in the physico-chemical properties of surface water and sediments in some villages located around a scrap metal recycling industry in Ile-Ife. This is with a view to monitor the impact of the industry on the quality of surrounding water. The three water bodies (one river, one stream and one pond) identified in the area were sampled every other month for ten months. Water and...
Ingestion of lead-contaminated vegetables could affect the intelligent quotient of school children
February 2020
Lead (Pb) is a potential environmental contaminant that has the capability of causing some human health problems, especially when it accumulates in food crops. This study aimed to evaluate the risk of ingesting Pb-contaminated vegetables on the intelligent quotient (IQ) of school children, using “target risk quotient” methodology. From the responses to the questionnaires administered to the school...
Induction of vitellogenin in cultured fish: Vitellogenin gene expression response of blue fin and yellow fin breams to injected 17 β-estradiol
February 2020
Aquatic organisms in the coastal regions are often exposed to many anthropogenic effluents. Kuwait Bay receives considerable quantities of sewage and industrial effluents, and thus, naturally, many endocrine disrupting chemicals (EDCs) find their way into the coastal waters. These EDCs could influence the physiology of the aquatic organisms inhabiting the coastal region. Response of two important local fish of...
Impact of industrial effluents, domestic wastewater and natural dams on heavy metals concentrations in vegetables cultivated in Northern Nigeria
February 2020
Vegetable cultivation is increasing because of its health benefit. However, in areas with limited fresh water, irrigation is from industrial and domestic wastewaters. Consumption of crops with high heavy metal content poses concern to health. A comparative analysis was conducted using AAS (Atomic Absorption Spectrophotometer) to determine the concentration of heavy metals in some vegetables irrigated with industrial...
The impact of household and similar solid wastes on Kara River quality due to their potential to release nitrogen
December 2019
This study purpose to assess the real share of nitrogen the household and similar solid wastes can release in direct contact with water. The maximum amount of nitrogen could release was determined by a leaching test. The concentrations of total and organic nitrogen, ammonium and nitrates ions and the pH values were measured in the initial and incubated juices. The leaching test showed that the solid waste can release...
Energy dispersive X-Ray fluorescence determination of minor and major elements in soils of Mambilla Plateau Northeastern Nigeria
February 2019
This study focuses on energy dispersive X-ray fluorescence determination of minor and major elements in selected soils of Mambilla Plateau. The 12 sampled soil composites analysed were done by energy dispersive X-ray fluorescence technique for minor and major elements. The elemental oxides determined were Al2O3, CaO, K2O, TiO2, SiO2, BaO, Fe2O3, and MnO. The result obtained in the study showed that the general...
Groundwater quality distribution by geostatistical investigation (GIS), Nile Delta, Northern Egypt
January 2019
The Nile Delta represents two-thirds of agricultural output with low precipitation and population growth that depletes the groundwater. The Quaternary aquifer is consisted of Holocene (aquitard) underlain by Pleistocene (aquifer), and groundwater flows from south to north, northwest, and northeast directions. The total dissolved solids (TDS) concentration increases toward the western and northeastern part in 1997 by...
Heavy metal remediation from municipal waste water using arrowroots (Amaranta arundinacea)
August 2018
Municipal wastewater contains high levels of pollutants since it is a collection of wastes from various sources of human activities. Municipal treatment of such wastewater is usually aimed at lowering the levels of pollutants to permissible amounts before discharge into recipient environment. Several conventional methods are available for treatment of wastewater. However, most of them are costly and not economically...
Arsenic concentration in rice grown from three local government areas of Kano, Nigeria
March 2018
Arsenic (As) in food and water has been linked to cancers and other diseases. Rice is of interest because many types may contain higher contents of As than other foods of terrestrial origin. As concentrations in rice produced from three Local Government Areas of Kano State were determined using Atomic Absorption Spectrophotometer. The mean As concentrations were 0.369 ± 0.092, 0.293 ± 0.126, and 0.255...
Degradation of perchlorate using green method: Mechanism and kinetic process
February 2018
This work analyzes the degradation of toxic perchlorate from wastewater and its conversion to non-toxic chloride ion through nano-scale zero valent iron (nZVI) coating. To prevent its agglomeration and to provide the required stabilization and more removal efficiency, it was coated with various coating agents which are co-friendly (green agents) and inexpensive. At first, nZVI was synthesized using green method....
Sorption mechanisms of Chromium(III), Copper(II) and Lead(II) on two natural mixed clays from Burkina Faso as determined by extended X-ray absorption fine structure (EXAFS) spectroscopy
December 2017
Chromium(III), copper(II) and lead(II) are among the heavy metals produced and released in large amounts by anthropogenic sources worldwide, including Burkina Faso. Previous studies have demonstrated the successful application of domestic natural mixed clays for the removal of these metal ions as a cheap and environmentally friendly method. Qualitative mineralogical characterization of the clays revealed that they...
Seasonal variation of elemental, physicochemical and microbiological characteristics of the stream water around hospital waste dumpsite in Ilesa, South-western Nigeria
November 2017
This study assessed the seasonal variation of microbiological, physicochemical and heavy metal analysis of water samples from Ayao Stream around a hospital waste dumpsite. Four samples were collected downstream and analyzed for microbial count, coliforms, pH, electrical conductivity, BOD5, alkalinity, total dissolved solids, water hardness, sulphate, nitrate, chloride and phosphate using standard method. Heavy metals...
Evaluation of the physicochemical and heavy metal content of ground water sources in Bantaji and Rafin-Kada settlements of Wukari Local Government Area, Taraba State, Nigeria
October 2017
Boreholes and hand dug wells from Bantaji and Rafin-Kada settlements of Wukari L.G.A. were analyzed for fourteen physicochemical parameters and seven heavy metals collected within July, 2015 to March, 2016 using standard methods. The mean difference in concentration of dissolved oxygen between the wet and dry seasons in the Bantaji boreholes was statistically significant at p<0.05. In addition, the electrical...
Effects of oil and gas exploration and production activities on production and management of seafood in Akwa Ibom State, Nigeria
September 2017
The current daily crude oil production in Nigeria stands at about 2.0 million barrels per day thus placing Nigeria as the 6th largest oil producing country in the world. Volumes of petroleum and its production wastes streams find their way into the inland waters and oceans. Seafood is any form of sea life regarded as food by humans including edible sea seaweeds and microalgae widely eaten as seafood, especially in Asia....
Evaluation of heavy metals in the soils of Karaikudi Town in India
June 2017
The Central Electro-Chemical Research Institute in India has a department that specializes in the design of both lead and nickel-chromium batteries. However, the laboratories activities have brought soils contamination of this department. This work involves assessing the presence of heavy metals such as lead, nickel and chromium in contaminated soils in the Center through the single and sequential extraction methods....
Accumulation of heavy metals on bed sediments of Nairobi dam, Kenya
March 2017
Globally heavy metals pollutants in aquatic systems are increasing and creating major ecological disturbance(s) and direct health problems. The study on accumulation of Copper (Cu), Cadmium (Cd), Lead (Pb) and Nickel (Ni) on the bottom surface sediments of Nairobi dam was conducted between November 2012 to April 2013. Seven sampling sites were selected within the dam and sediment samples were collected once in a month...
Waste degradation and leachate quality on composting platform: A case study in Lome, Togo
November 2016
Chemical or organic compounds released during the waste composting could be harmful to the environment. The purpose of this work is to investigate the stability indices of organic matter after the lixiviation runs on composting platforms. The results showed that the organic matter became resistant to biodegradation after 2 months of wastes composting, that the nitrates content decreased, while the phosphorus one...
Identification and quantification of phthalates in water and sediment of Ori Stream, Iwo, Southwestern Nigeria using high performance liquid chromatography
September 2016
This study provides data on distribution of phthalate esters (PAEs) in the water and sediments in the Ori stream, Iwo, Nigeria. The liquid-liquid extraction method was employed, followed by cleaned up in an alumina column using hexane. Chromatographic separation and quantification were done using Zorbax Eclipse AAA C18 analytical column. The concentrations of DMP, DBP, DEP, and DPP in water (µg/L) ranged from...
Sulphur and heavy metals contents in soils and Grewia bicolor leaves around the Selibe Pikwe Cu-Ni mine (BCL), Botswana
August 2016
This study investigated environmental pollution due to mining activities at the BCL mine in Selibe-Phikwe town, Botswana and assessed the level of heavy metals and sulphur in soil and Grewia bicolor leaves adjacent to the mine. Soil and G. bicolor were contaminated with heavy metals on the downwind side, where also concentrations of sulphur in the soil and G. bicolor were found to be elevated when compared to the upwind...
Heavy metals and metalloid accumulation in livers and kidneys of wild rats around gold-mining communities in Tarkwa, Ghana
July 2016
Previous studies revealed high levels of metals in soils, drinking water, foodstuffs and food animals in several communities in Tarkwa, Ghana. Therefore wild rats were trapped from 16 communities in Tarkwa to estimate the environmental pollution state of metals; determine differences in sex in metal accumulation; and assess the potential risks involved. Concentrations of arsenic (As), cadmium (Cd), cobalt (Co), chromium...
Study on the effectiveness of five cleaning solutions in removing chlorpyrifos residues in cauliflower (Brassica oleracea)
July 2016
Nowadays, contents of pesticide residues in vegetables had become one of the hot topics closely related to human health. In order to investigate the effectiveness of several cleaning solutions in removing pesticide residues in vegetables, a polluted cauliflower was washed using five types of cleaning solutions which were soda-salt solution, vinegar solution, tamarind juice solution, filtered flour solution, and tap...
Determination of bisphenol A in exposed bottled water samples to direct sun light using multi walled carbon nanotubes as solid phase extraction sorbent
July 2016
Polycarbonate plastics (PC) containing bisphenol A (BPA) are used for the production of bottles for storage drinking water. Trace amounts of BPA have been detected in ten different brands of bottled water samples from Khartoum supermarkets. Residues of BPA in bottled water were pre-concentrated using solid-phase extraction and determined by high performance liquid chromatography with fluorescence detector....
Physico-chemical characterization of tannery effluent and its impact on the nearby river
June 2016
A study was conducted to characterize Modjo tannery effluent (wastewater) and determine its impact on the Modjo River using some physicochemical parameters. Accordingly, three tannery wastewater samples along wastewater channel at different distances have been taken and three river water samples (one upstream and two downstream) were collected along the river to determine its impact on the river. The samples have been...
Determination of heavy metal concentration in Neem (Azadirachta indica) leaves, bark and soil along some major roads in Lafia, Nasarawa State Nigeria
May 2016
Soil, vegetation and atmospheric pollution have been a serious problem in recent years in Lafia, especially among the communities living along the major highways due to increase in industrialization and vehicular movements. The level of heavy metals (Cd, Cr, Ni, Pb and Zn) in Neem tree leaves, bark and soil along major roads in Lafia were determined using digestion and atomic absorption spectrophotometer methods. The...
Effect of Dichlorvos on Reproductive Performance of Laying hens
April 2016
The effect of dichlorvos on reproductive performance of laying hens was studied. Seven weeks old pullets with an average weight of 557.5 ± 9.5 g were divided into four groups and fed ad libitum with commercial poultry feeds contaminated with 0.01, 0.02 and 0.04% dichlorvos (w/v). The group without dichlorvos served as the control. Exposure to dichlorvos was continued until nine weeks after the hens started laying...
Quantification of pharmaceutical residues in wastewater impacted surface waters and sewage sludge from Lagos, Nigeria
March 2016
Information on the occurrence of pharmaceuticals in the environment of Nigeria is limited, only a single publication previously on pharmaceutical occurrence in the environment of Nigeria, which measured general estrogen levels in Enugu, South-East Nigeria. In order to establish a first overview, surface water samples from six locations as well as ten sewage sludge samples from waste water treatment plants were analysed...
Sensitivity, ecotoxicity and histopathological effects on neotropical fish exposed to glyphosate alone and associated to surfactant
March 2016
The aim of this research was to evaluate neotropical fish sensitivity (Piaractus mesopotamicus, Phallocerus caudimaculatus, Hyphessobrycon eques, and Brachydanio rerio) to a reference substance (potassium chloride); to estimate the lethal concentration (LC50; 96 h) for glyphosate, formulated as Rodeo® alone and in association with 0.5 and 1.0% Aterbane® BR surfactant and to evaluate the histopathology of the...
Physicochemical properties of the effluents of Forcados Terminal in Warri, Delta State
February 2016
Physicochemical properties of the effluent samples from Forcados Terminal in Warri, Delta State were studied from May 2008 to June 2009. Effluent samples were collected from the two Barge Jetties A and B and Two Saver Pits 1 and 2 inside the tank farm. A total of 96 effluent samples were collected throughout the study period. Physicochemical properties of the effluent samples were determined using Hach methods as...
Distribution of trace metals in surface water and sediments of Imo River Estuary (Nigeria): Health risk assessment, seasonal and physicochemical variability
January 2016
The distribution of trace metals (Zn, Cu, Ni, Mn, Fe, Co, V, Pb and Cd) in surface water and sediments from Imo River estuary in relation with the physicochemical variables were studied for both dry and wet seasons. The results obtained revealed that trace metal levels displayed marked spatial and seasonal variations in surface water and sediments, which is attributed to both anthropogenic natural processes in the...
Assesement of the quality of leachate at Sarbah landfill site at Weija in Accra
December 2015
Physico-chemical and bacteriological characteristics of Sarbah dump site at Weija, Accra were investigated to ascertain the leachate quality for possible treatment. The leachate was observed to be alkaline in nature and had high concentration of the following biological oxygen demand (BOD), chemical oxygen damand (COD) and oil and grease. Samples of leachate were collected from different sites close to the landfill. On...
Studies on contamination of surface waters of river Benue with trace elements at Makurdi, Benue State, Nigeria
October 2015
The concentration of trace metals were determined in the world of waters River Benue within Makurdi Metropolitan area using atomic absorption spectrophotometer for two seasons. The mean concentration of the heavy metals Pb, Ni, Cu, Cr, Cd and Al obtained in mg/L were 0.42, 0.39, 0.35, 1.58, 0.19 and 0.04 respectively. There was no significant difference in the concentration of heavy metals across the studied stations...
Surface water contamination in Halsi Nala; an assessment and spatial distribution survey using geographical information systems (GIS) approach
September 2015
Present study was designed to assess the fate, occurrence, spatial and temporal distribution of anthropogenic contaminants in water of Halsi Nala, a major tributary to River Chenab, subjected to different pressures (industrial, agricultural, domestic waste water discharges). As the studied water basin runs through several residential, agricultural and industrial areas, so its water quality affected along its course....
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