Nigerian Journal of Science and Environment最新文献_第9页

CONCENTRATIONS OF SEVEN HEAVY METALS IN THE LEAVES OF OIL PALM TREE (ELAEIS GUINEENSIS) AND ALMOND TREE (PRUNUS DULCIS) IN STEEL PRODUCTION AREAS OF DELTA STATE, NIGERIA 尼日利亚三角洲州钢铁生产区油棕(elaeis guineensis)和杏树(prunus dulcis)叶片中七种重金属的浓度

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.17.121.1

S. O. Akporido

引用次数: 0

KINETIC AND THERMODYNAMIC MODEL FOR THE REMOVAL OF ULTRAMA- RINE BLUE FROM AQUEOUS SOLUTION USING MODIFIED CASSAVA PEELS 用改性木薯皮从水溶液中去除超蓝的动力学和热力学模型

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.16.026.1

A. K. Asiagwu

引用次数: 1

ADSORPTION OF WATER-BORNE PB2+ OVER CHEMICALLY-TREATED LEAVES OF TRIDAX PROCUMBENS 化学处理过的三叶草叶片对水性pb2 +的吸附

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.17.083.1

U. Gaya, U. Abubakar, S. Buhari

引用次数: 0

AN INTEGRATION OF GEOPHYSICAL AND GEOCHEMICAL DATA IN EVALUAT- ING GROUNDWATER RESOURCES IN SAPELE METROPOLIS, WESTERN NIGER DELTA 地球物理和地球化学数据在尼日尔三角洲西部萨佩莱大都市地下水资源评价中的应用

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.16.040.1

O. Ohwoghere-Asuma, K. Aweto

{"title":"AN INTEGRATION OF GEOPHYSICAL AND GEOCHEMICAL DATA IN EVALUAT- ING GROUNDWATER RESOURCES IN SAPELE METROPOLIS, WESTERN NIGER DELTA","authors":"O. Ohwoghere-Asuma, K. Aweto","doi":"10.5987/UJ-NJSE.16.040.1","DOIUrl":"https://doi.org/10.5987/UJ-NJSE.16.040.1","url":null,"abstract":"An integration of geoelectrical and geochemical data was used in Sapele metropolis to delineate the aquifer unit(s) and evaluated the geochemical parameters of the groundwater in the area. Ten (10) water samples were collected from hand-dug wells for geochemical analysis. The geochemi- cal parameters showed average values of 6.20 pH; 156.0μs/cm EC; 7.60mg/l TH; 4.50mg/l, Ca2+; 4.20mg/l Mg2+; 0.95mg/I K+; 1.00mg/l Na+; 0.87mg/l ∑Fe; 0.03mg/I Cu2+; 0.04mg/I Cr2+ ; 28.68mg/l Cl- ; 5.40mg/I HCO3-; 2.41mg/l NO3-; 0.80mg/l SO42- and average sodium absorption ratio (SAR) of 1.36. The relative abundance of cations using these concentrations is in the order of Ca2+> Mg2+ > Na+> K+ > ∑Fe > Cr2+ > Cu2+ while those of anions are in the order Cl- > HCO3- > NO3- >SO42+. Fifteen (15) vertical electrical soundings were carried out in the study area using Schumberger electrode configuration. The result of the interpretation of the VES curves showed that the area is made up of four and five geoelectric layer. The third and fourth layer made up of medium, coarse and gravelly sand constitutes the aquifer unit(s), the average depth to the aquifer is 35.2m. The concentration of the various parameters determined in the groundwater were relatively in accordance with WHO recommended standard for domestic and agricultural purposes except pH and ∑Fe in Okirighwre , Ajogodo and Ogorode. Cr2+ concentrations generally were below stipu- lated standard in most of Sapele metropolis, except at Ugbeyiyi and Ugberikoko where concentra- tions exceeded WHO maximum allowance limit of 0.05mg/l.","PeriodicalId":119603,"journal":{"name":"Nigerian Journal of Science and Environment","volume":"41 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114093275","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

POTENTIAL OF BRACHYSTEGIA EURYCOMA GUM IN AMELIORATING BRITTLE FRACTURE DURING TABLETING 短肌突eurycoma gum在改善片压期间脆性骨折的潜力

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.17.087.1

E. Osazuwa, M. Uhumwangho

{"title":"POTENTIAL OF BRACHYSTEGIA EURYCOMA GUM IN AMELIORATING BRITTLE FRACTURE DURING TABLETING","authors":"E. Osazuwa, M. Uhumwangho","doi":"10.5987/UJ-NJSE.17.087.1","DOIUrl":"https://doi.org/10.5987/UJ-NJSE.17.087.1","url":null,"abstract":"The aim of the present study is to investigate the potential of Brachystegia eurycoma gum in ameliorating brittle fracture (i.e., lamination and capping) a problem often encountered during tableting. Granules of metronidazole (test drug) were prepared by wet granulation technique using Brachystegia eurycoma or acacia gum at concentrations of 2.5, 5.0, 7.5 or 10%w/w. The resulting granules were evaluated for packing and flow properties. Granules were compressed into tablets with and without a centre hole (as in- built defect) using a compression load of 2.0 arbitrary unit on the load scale. The tablets were evaluated for tensile strength and the data was used to calculate the brittle fracture index (BFI). The compressibility index which is a measure of ease of compaction of the granules upon tapping was < 23.5% while all granules were free flowing with angle of repose <36.90. Increase in binder concentration led to an increase in Pf and T values irrespective of the type of the gum binder used in the formulations. Generally, increasing the binder concentration at a given compression load resulted in a decrease in the brittle fracture tendency of the tablets. For instance, at a binder concentrations of 2.5% w/w the BFI for Brachystegia eurycoma and acacia gum were 0.13 and 0.10 respectively while their corresponding values at binder concentration of 7.5% w/w were 0.06 and 0.08. The study has shown that Brachystegia eurycoma gum is an effective binder that produces harder tablets with low brittle fracture tendency.","PeriodicalId":119603,"journal":{"name":"Nigerian Journal of Science and Environment","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129307958","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

EFFECTS OF PRESERVATION METHODS ON THE CONCENTRATION OF ASCOR- BIC ACID IN SELECTED FISHES 不同保存方法对所选鱼类抗坏血酸浓度的影响

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.16.034.1

O. Emoyan

引用次数: 0

WINDOW-BASED MENSTRUAL CALCULATOR SOFTWARE FOR DEVELOPING NATIONS 面向发展中国家的基于窗口的月经计算器软件

Nigerian Journal of Science and Environment Pub Date : 2013-05-15 DOI: 10.5987/UJ-NJSE.17.115.1

M. Akazue

引用次数: 0

BIODEGRADATION POTENTIALS OF BACTERIA ISOLATED FROM ELEME PETROCHEMICAL INDUSTRIAL EFFLUENT 元素石化工业废水中分离细菌的生物降解潜力

Nigerian Journal of Science and Environment Pub Date : 2012-09-02 DOI: 10.5987/UJ-NJSE.16.035.1

Ajuzie C.U, Atuanya E.I, Amaje F.U

{"title":"BIODEGRADATION POTENTIALS OF BACTERIA ISOLATED FROM ELEME PETROCHEMICAL INDUSTRIAL EFFLUENT","authors":"Ajuzie C.U, Atuanya E.I, Amaje F.U","doi":"10.5987/UJ-NJSE.16.035.1","DOIUrl":"https://doi.org/10.5987/UJ-NJSE.16.035.1","url":null,"abstract":"The biodegradation potentials of microorganisms isolated from different sampling points of Eleme Petrochemical Industrial Effluent was investigated. Physicochemical analyses revealed that process waste water had concentrations of chemical oxygen demand (COD) (156 mg/L), biochemical oxygen demand (BOD) (400 mg/L), total dissolved solids (TDS) (25,000 mg/L), pH (11.11), nitrate (0.952 mg/L), dissolved oxygen (DO) (0 mg/L) and conductivity (7,320 ms/cm). Microbiological enumeration showed that the total heterotrophic bacteria count (THBC) from process waste water (PWW), clarified water (CW), retention pond gate (RPG) and receiving river (RR) ranged from 1.3 x 104 to 4.9 x 104 CFU/ml. Microbial counts for hydrocarbon utilizing bacteria (HUB) from PWW, CW, RPG and RR ranged from 0 to 2.7 x 104 CFU/ml. Characterization of the bacteria revealed ten (10) genera: Enterobacter, Proteus, Bacillus, Salmonella, Citrobacter, Flavobacterium, Pseudomonas, Vibrio, Seirratia and Escherichia coli. Efficiency of utilizing petrochemical industrial effluent under aerobic condition was demonstrated by Pseudomonas sp, Serratia sp. and Bacillus sp. Consortium of Bacillus sp., Pseudomonas sp, and Serratia sp, had the greatest efficiency for the utilizing petrochemical industrial effluent. Utilization of the hydrocarbons in petrochemical industrial effluent decreased reduction in percent of COD by Pseudomonas sp. (47.32), Serratia sp. (92.5) and the Consortium (65.38), with a decrease in the pH values of the cultures.","PeriodicalId":119603,"journal":{"name":"Nigerian Journal of Science and Environment","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114291663","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

ANALYSIS OF PRESERVATION EFFECTS ON THE CONCENTRATION OF IRON AND IODINE IN SELECTED FISH SPECIES 保存对选定鱼种铁、碘浓度的影响分析

Nigerian Journal of Science and Environment Pub Date : 2012-09-02 DOI: 10.5987/UJ-NJSE.16.042.1

Emoyan O.O, Agbaire P.O, C. Otobrise

引用次数: 0

THERMAL EFFECT OF GAS FLARING AT EBEDEI AREA OF DELTA STATE, NIGERIA 尼日利亚三角洲州ebedei地区天然气燃烧的热效应

Nigerian Journal of Science and Environment Pub Date : 2012-09-02 DOI: 10.5987/UJ-NJSE.17.124.1

O. Anomohanran

{"title":"THERMAL EFFECT OF GAS FLARING AT EBEDEI AREA OF DELTA STATE, NIGERIA","authors":"O. Anomohanran","doi":"10.5987/UJ-NJSE.17.124.1","DOIUrl":"https://doi.org/10.5987/UJ-NJSE.17.124.1","url":null,"abstract":"Gas flaring has become a major monster to communities where crude oil is produced and processed. This study therefore investigates the thermal effect of gas flaring on the Ebedei community of Delta State, Nigeria. Measurements of temperature variation with distance from four different directions from the flare point were obtained for 15 days each for both the wet and dry season. Result shows that the average temperature of the area under investigation ranged from 270C to 520C for the raining season and 380C to 570C for the dry season. Result when compared with daily average temperature obtained from satellite reading shows a temperature elevation which ranges from 2.20C to 24.20C for the wet season and 1.90C to 20.90C for the dry season. Results further indicate that the direct effect of the elevated temperature is eliminated after a distance of 2.15 km for the raining season and 2.06 km for the dry season. It is recommended that agricultural crops which respond negatively to high temperature variation should not be planted in this area. The oil company in Ebedei is encouraged to expedite the completion of the gas plant under construction and put it into use to reduce drastically the gas flared in the area. The government is also called upon to pass a legislation to end gas flaring in Nigeria within the shortest possible time.","PeriodicalId":119603,"journal":{"name":"Nigerian Journal of Science and Environment","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126953598","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: 15