Global Journal of Environmental Sciences最新文献

HEAVY METAL PROFILES IN VARIOUS MATRICES OF THE BONNY/NEW CALABAR RIVER ESTUARY, NIGER DELTA, NIGERIA 尼日利亚尼日尔三角洲邦尼/新卡拉巴尔河口不同基质重金属剖面

Global Journal of Environmental Sciences Pub Date : 2015-01-19 DOI: 10.4314/GJES.V12I1.1

B. Babatunde, F. Sikoki, M. Onojake, R. U. Akpiri, D. Akpuloma

{"title":"HEAVY METAL PROFILES IN VARIOUS MATRICES OF THE BONNY/NEW CALABAR RIVER ESTUARY, NIGER DELTA, NIGERIA","authors":"B. Babatunde, F. Sikoki, M. Onojake, R. U. Akpiri, D. Akpuloma","doi":"10.4314/GJES.V12I1.1","DOIUrl":"https://doi.org/10.4314/GJES.V12I1.1","url":null,"abstract":"A study of the concentrations of Ca, Mg, K, Zn, Pb, Cd, Co, Cr, Cu, Fe, Ni and Na in the sediment, sea water, fish and crab of the Bonny/New Calabar River Estuary in Niger Delta, Nigeria was carried out using atomic absorption spectrophotometer A-100 for two consecutive years. The contamination levels of the respective metals varied between 2011 and 2012and the range of mean values for all metals in mg/kg were presented along with variations at statistically significant level (P <0.05) between the two years studied. Only K, Zn and Co exhibited variation in their concentrations in water samples between the two years at a statistical significant level (P <0.05) probability. In sediment, only Cr varied between the two years at a statistically significant level (P = 0.05). All metals concentrations were higher in sediment than in water samples.Bioaccumulation factor (BF) indicated a more potent source of metals from sediment than water with organisms accumulating Zn, Fe and Ni in the magnitude of 10, 6 and 5 times more from sediment than from water. Some metals were more accumulated in fish than crab and vice versa. The evidence of elevated levels of heavy metals in sediment and bioaccumulation in biota in the studied area may poise a wanton threat to the health of inhabitants whose diet is predominantly fish. This calls for regular monitoring to avert potential public health problems arising from consumption of metals in seafood.","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"44 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2015-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87586853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effect of Indomie industrial effluent discharge on fish fauna of New Calabar River, Port Harcourt 英多米工业废水排放对哈科特港新卡拉巴尔河鱼类区系的影响

Global Journal of Environmental Sciences Pub Date : 2015-01-19 DOI: 10.4314/gjes.v12i1.5

G. Woke, B. Babatunde, Wokoma Aleleye

{"title":"Effect of Indomie industrial effluent discharge on fish fauna of New Calabar River, Port Harcourt","authors":"G. Woke, B. Babatunde, Wokoma Aleleye","doi":"10.4314/gjes.v12i1.5","DOIUrl":"https://doi.org/10.4314/gjes.v12i1.5","url":null,"abstract":"The effect of Indomie industrial effluent discharge on the fish fauna of New Calabar River was investigated in order to ascertain the influence of BOD, COD, DO, TDS, TSS, pH, salinity, phosphate and temperature on the composition and distribution of fish fauna. The diversity of the fish fauna was found to be poor, only 12 fish species in 6 families were identified. The highest number (10) of fishes was recorded in station 4 while the least number (1) of fishes was observed in station 1. The fish families were: Cichlidae (38.89%), Clupidae (33.33%), Pomadasyidae (16.67%), Bagridae (11.11%) while Genidae and Muglidae had zero percentage of fishes in its abundant. The resident fish species ( Ethmalosa fimbriata and Tilapia guinensis ) were highly adapted to the changes in the study environment and this was dependent on their trophic relationship within the environment. These species had great affinity for indomie industrial waste, because they feed on waste remains, mud/sediment silts and annelids, juveniles of shrimps and crabs. The deterioration of water quality was evident by the high BOD (12.80mg/L), COD (130mg/L), TDS (37mg/L), TSS (62mg/L), pH (5.2), salinity (50.54mg/L), phosphate (0.14mg/L) and temperature (27 0 C) as well as the low dissolved oxygen (2.8mg/L) values observed. It was recommended that a routine treatment of the effluent before discharge into the water should be carried out so to maintain safe levels of industrial effluent in the immediate and extended environment.","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"12 1","pages":"41-47"},"PeriodicalIF":0.0,"publicationDate":"2015-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83309197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Status evaluation of heavy metals in waste disposal sites of champion breweries and plasto crown company, Uyo, Akwa Ibom State, Nigeria 尼日利亚阿夸伊博姆州Uyo市冠军啤酒厂和普拉斯托皇冠公司废物处理场重金属现状评价

Global Journal of Environmental Sciences Pub Date : 2015-01-19 DOI: 10.4314/GJES.V12I1.6

Us Umana

{"title":"Status evaluation of heavy metals in waste disposal sites of champion breweries and plasto crown company, Uyo, Akwa Ibom State, Nigeria","authors":"Us Umana","doi":"10.4314/GJES.V12I1.6","DOIUrl":"https://doi.org/10.4314/GJES.V12I1.6","url":null,"abstract":"Sludge and soil samples were collected through purposive sampling method within Champion Breweries and Plasto Crown Company waste disposal sites during wet and dry seasons for status evaluation of their heavy metals (Fe, Pb, Zn, Ni, Cr, Cd, Co and Hg) for comparison with the control site and the world threshold standards for tropical soils. The results showed that the sludge pH value of 7.89 during wet season signified alkaline medium (outside the natural range of acidic medium for soils in the Niger Delta region of Nigeria) which was attributed to the high calcium content of the brewery effluent. The 7.42 pH value during wet season for soil in the Plasto Crown Company waste disposal site indicated alkaline medium which was due to the remnants of the wastes which formed lime to neutralize the acidic medium of the soil while the electrical conductivity values (below 4 dSm-1) indicated the nonsalinity of the soils. More so, a two way analysis of variance (ANOVA) statistical method used to run the analysis revealed that the soil in terms of heavy metal concentrations did not exceed the world threshold standards. Keywords : Soil, sludge, heavy metal concentrations, permissible standards.","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"19 1","pages":"49-60"},"PeriodicalIF":0.0,"publicationDate":"2015-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82859646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PHYTOREMEDIATION OF SEWAGE SLUDGE IN SOILS CONTAMINATED WITH HEAVY METALS 重金属污染土壤中污水污泥的植物修复

Global Journal of Environmental Sciences Pub Date : 2015-01-19 DOI: 10.4314/GJES.V12I1.2

C. O. Awalla

引用次数: 2

Tannery wastes water treatment using Moringa Stenopetala seed extract 用辣木籽提取物处理制革厂废水

Global Journal of Environmental Sciences Pub Date : 2015-01-19 DOI: 10.4314/GJES.V12I1.4

Shetie Gatew, W. Mersha

{"title":"Tannery wastes water treatment using Moringa Stenopetala seed extract","authors":"Shetie Gatew, W. Mersha","doi":"10.4314/GJES.V12I1.4","DOIUrl":"https://doi.org/10.4314/GJES.V12I1.4","url":null,"abstract":"High amount of heavy metal ions like Cr in the environment has been harmful for animal and human health. Bioadsorption of Cr from tannery wastes would be an alternative method to the chemical treatment in tannery industries. Hence, in this study the efficiency of Moringa stenopetala seed extract to adsorption Cr from tannery waste water was investigated. The influence of solution pH, adsorbent concentration, initial concentration of Cr, contact time and temperature on the efficiency of Moringa stenopetala seed extract for the adsorption of Cr from tannery effluent was studied. Results obtained revealed that in strongly acidic condition Moringa stenopetala seed extract was less efficient to remove Cr. However, the result of the present study showed that Moringa stenopetala seed extract at a concentration of 1g/100 ml and pH of 9.5 decreased the concentration of Cr in tannery waste by 99.86%. In addition, the adsorption data was correlated using the Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherm models. Among models studied Dubinin-Radushkevich isotherm was the best fit with correlation coefficient of 0.958. Moreover, thermodynamics parameters, such as Gibbs free energy (AGo), enthalpy (AHo), and entropy (ASo) were calculated. Results indicated that the bioadsorption of Cr by Moringa stenopetal a seed extract was spontaneous, feasible and endothermic. The results of this study proved that Moringa stenopetala seed extract can be used to remove Cr from tannery effluent. KEYWORDS : Moringa stenopetala , Cr, tannery, pH, temperature, concentration","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"26 1","pages":"29-39"},"PeriodicalIF":0.0,"publicationDate":"2015-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75120026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

DIESEL EXPOSURE OF TYMPANOTONUS FUSCATUS AND ITS EFFECTS ON ENZYME ACTIVITY 褐鼓膜虫柴油暴露及其对酶活性的影响

Global Journal of Environmental Sciences Pub Date : 2015-01-19 DOI: 10.4314/gjes.v12i1.3

O. Edori, D. M. George, E. Edori

{"title":"DIESEL EXPOSURE OF TYMPANOTONUS FUSCATUS AND ITS EFFECTS ON ENZYME ACTIVITY","authors":"O. Edori, D. M. George, E. Edori","doi":"10.4314/gjes.v12i1.3","DOIUrl":"https://doi.org/10.4314/gjes.v12i1.3","url":null,"abstract":"The effect of mild concentrations of diesel (10.40,15.60,21.00 and 26.00 mg/l) on some biochemical parameters such as Aspartate transaminase (AST), Alanine transaminase (ALT), and Alkaline phosphatase (ALP), in the tissue of periwinkle ( tympanotonus fuscatus ) were examined using a renewal static bioassay for six days. The activities of the enzymes were measured on 120 specimens of periwinkle of size between 4.5-5.5cm lengths. The result of AST activity in the muscle showed either an increased or decreased activity against the control. The activity of ALT showed significant (p=0.05) decrease in all the test concentrations. ALT also showed significant difference (p=0.05) which were either higher or lower than the control value. In the viscera, activity of AST significantly increased (p=0.05) than that of the control. ALT activity was significantly increased (p=0.05) above the control except at 10.40ml/L where a significant decrease (p=0.05) was observed. Significant increase (p=0.05) was observed in the activity of ALP above the control value except at 10.40ml/L. The result of the tissue enzyme activities indicated alteration in the biochemistry of tympanotonus fuscatus and therefore could be used as a biomarker of aquatic pollution and toxicities. KEYWORDS : Diesel, Tympanotonus fuscatus , Enzyme, Toxicity, pollution","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"1955 1","pages":"21-28"},"PeriodicalIF":0.0,"publicationDate":"2015-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88764071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Water quality assessment of underground and surface water resources of Bahir Dar and Periurban areas, north-west Ethiopia 埃塞俄比亚西北部巴希尔达尔和城郊地区地下和地表水资源的水质评价

Global Journal of Environmental Sciences Pub Date : 2011-01-01 DOI: 10.4314/GJES.V10I1

G. Goshu, O. Akoma

{"title":"Water quality assessment of underground and surface water resources of Bahir Dar and Periurban areas, north-west Ethiopia","authors":"G. Goshu, O. Akoma","doi":"10.4314/GJES.V10I1","DOIUrl":"https://doi.org/10.4314/GJES.V10I1","url":null,"abstract":"Water quality assessment in the Ethiopian highlands is crucial owing to increasing competing need of water for domestic, agricultural and industrial uses. Twelve physico-chemical parameters were analyzed in water samples collected over a period of five months from three different sources; groundwater (hand dug wells and protected hand pumps) and surface water (streams and lake) in Bahir Dar and peri-urban areas. Differences in water quality parameters between the sources were compared to identify pollutant sources and level of compliance with certain water quality criteria. Based on cluster analysis, the sampling stations were classified into two major categories; inner city and outer city; with the surface waters recording far more pollution by fecal contamination. Chloride, TDS, conductivity, total hardness and all the species of nitrogen (nitrite, nitrate and ammonium) were higher in the inner city than the remaining water habitats except the outer ground water stations. Conductivity decreased along the presumptive pollution categories significantly, i.e. inner > middle > out skirt (P< 0.05) and showed medium to high correlation with chloride, total hardness, nitrate, nitrite, total dissolved solids in ground water (r = 0.58 – 0.85). Dissolved oxygen, pH and SAK254 were higher in the lake station than other water bodies. The results from this research would help in developing best management practices for the Bahir Dar municipal water scheme and for regional water scheme program in the future and provide information for formulating appropriate framework for an integrated water management strategy.","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"26 1","pages":"11-21"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80688537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effect of crude oil extracts on early stages of African catfish Heterobranchus longifilis (val.) reared under controlled condition 原油提取物对控制条件下饲养的非洲长尾鲶鱼早期生长的影响

Global Journal of Environmental Sciences Pub Date : 2010-04-16 DOI: 10.4314/GJES.V8I2.53780

I. Ewa-Oboho, O. Amu

{"title":"Effect of crude oil extracts on early stages of African catfish Heterobranchus longifilis (val.) reared under controlled condition","authors":"I. Ewa-Oboho, O. Amu","doi":"10.4314/GJES.V8I2.53780","DOIUrl":"https://doi.org/10.4314/GJES.V8I2.53780","url":null,"abstract":"Eggs and larvae of Heterobranchus longifilis were exposed to extracts of different concentrations of Nigerian Bonny light crude oil and Exxon Mobil Oso off-shore condensate during a comparative toxicity experiment carried out in the Institute of Oceanography Fish Farm, University of Calabar, Nigeria. Petroleum hydrocarbon was extracted from the two oils in separate 30litre glass aquaria and the eggs and young larvae were contaminated by exposing them to three concentrations of both oils, viz: 101, 103, 102ppm for approximately 10 days. Young eggs seemed to be more sensitive from 5 to 30 hours after fertilization. Extract from 104 ppm of Bonny Light Crude and Oso condensate caused 40% and 30% mortality respectively, after 100h. Embryos contaminated with Bonny Light crude extract did not recover on transfer to clean water. Delayed development was observed in the two-highest concentrations. Heterobranchus longifilis larvae were found to have a “mean critical time” of 4.2 days in the highest concentration of Oso condensate extract when larval integument was damaged. It is concluded that Bonny light crude could be a more dangerous pollutant to juvenile fish than the Oso condensate. KEYWORDS: Heterobranchus longifilis , crude Oil extracts, Mortality, Bonny Light Crude, Exxon Mobil Oso Condensate.","PeriodicalId":12569,"journal":{"name":"Global Journal of Environmental Sciences","volume":"55 1","pages":"23-28"},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80881581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Speciation of heavy metals in the sidments of Gubi dam, Bauchi state, Nigeria 尼日利亚包奇州古比大坝沉积物中重金属的形态

Global Journal of Environmental Sciences Pub Date : 2010-04-16 DOI: 10.4314/gjes.v8i2.53784

B. M. Wufem, A. Ibrahim, N. Gin, M. Mohammed, E. Ekanem, M. A. Shibdawa

引用次数: 1

ASSESSMENT OF SOLID WASTE MANAGEMENT IN GBOKO TOWN gboko镇固体废物管理评估

Global Journal of Environmental Sciences Pub Date : 2010-04-16 DOI: 10.4314/GJES.V8I2.53786

G. Akpen, S. Aondoakaa

引用次数: 9