Physicochemical characterization of an artificial pond receiving leachate influx at Aba-Eku dumpsite, Ibadan, Nigeria
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Estatal a Distancia
2012
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| _version_ | 1876479600202088448 |
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| author | Adeola A. Oni |
| author_facet | Adeola A. Oni |
| contents | Physicochemical characterization of an artificial pond receiving leachate influx at Aba-Eku dumpsite, Ibadan, Nigeria Adeola A. Oni Amusat T. Hassan Peijun Li Multidisciplinaria (Ciencias Naturales y Exactas) Landfill treatment contaminants natural attenuation leachate characterization Proper leachate treatment is necessary to avoid adverse environmental impact. An artificial pond receiving leachate influx from the Aba- Eku dumpsite, Ibadan, South-Western Nigeria, was characterized to provide baseline information for appropriate treatment. Pond leachate and comparative groundwater control were sampled monthly between January 2003 and September 2004. The pH, TSS, total solids, conductivity and COD were analyzed using American Public Health methods. Calcium, magnesium and selected metals were determined using Inductively Coupled Plasma; selected anions and ammonia were determined using Ion Chromatography. T-test and correlation coefficients were used for data analysis. Results: pH: 8,21, TSS:1 44,94mg/l, total solids:1377,67mg/l, conductivity:2466,00us/cm and COD:57,63mg/l were significantly elevated (p<0,05) above control; pH: -7,79; TSS: 42,96mg/l, total solids:119,52mg/l, conductivity:153,09us/ cm and COD: 9,80mg/l. Calcium and magnesium in leachate differed significantly from control. Metals in leachate and control showed no significant differences except for iron (5,27; 0,82mg/l); manganese (2,31; 0,04mg/l) and cadmium; (0,157; 0,03mg/l). Lead, copper, zinc, chromium and nickel were not significantly different from control. Chloride (597,98; 5,24mg/l), nitrate (12,3; 2,35mg/l) and sulphate – 118,86; 3,09mg/l) in leachate and control however differed significantly, phosphate was not detected. Ammonium correlated negatively with nitrate(-0,608) and sulphate(-0,676) p<0,05. Attenuation processes reduced contaminant levels. Similarities in metal content may be due to increased leachate pH which consequently reduced metal solubility. Suspended solids and chloride were parameters of concern. Nitrates and sulphates increased in the wet season probably due to ammonium oxidation reactions. There is minimal need for treatment. However, polishing of leachate effluent via physico-chemical methods may be considered. 2012 artículo científico 1659-4266 https://www.redalyc.org/articulo.oa?id=515651981007 en http://www.redalyc.org/revista.oa?id=5156 UNED Research Journal / Cuadernos de Investigación UNED application/pdf Universidad Estatal a Distancia UNED Research Journal / Cuadernos de Investigación UNED (Costa Rica) Num.1 Vol.4 |
| format | Artículo científico |
| id | redalyc_515651981007 |
| institution | Redalyc |
| language | en |
| publishDate | 2012 |
| publisher | Universidad Estatal a Distancia |
| spellingShingle | Physicochemical characterization of an artificial pond receiving leachate influx at Aba-Eku dumpsite, Ibadan, Nigeria Adeola A. Oni Multidisciplinaria (Ciencias Naturales y Exactas) Landfill treatment contaminants natural attenuation leachate characterization Physicochemical characterization of an artificial pond receiving leachate influx at Aba-Eku dumpsite, Ibadan, Nigeria Adeola A. Oni Amusat T. Hassan Peijun Li Multidisciplinaria (Ciencias Naturales y Exactas) Landfill treatment contaminants natural attenuation leachate characterization Proper leachate treatment is necessary to avoid adverse environmental impact. An artificial pond receiving leachate influx from the Aba- Eku dumpsite, Ibadan, South-Western Nigeria, was characterized to provide baseline information for appropriate treatment. Pond leachate and comparative groundwater control were sampled monthly between January 2003 and September 2004. The pH, TSS, total solids, conductivity and COD were analyzed using American Public Health methods. Calcium, magnesium and selected metals were determined using Inductively Coupled Plasma; selected anions and ammonia were determined using Ion Chromatography. T-test and correlation coefficients were used for data analysis. Results: pH: 8,21, TSS:1 44,94mg/l, total solids:1377,67mg/l, conductivity:2466,00us/cm and COD:57,63mg/l were significantly elevated (p<0,05) above control; pH: -7,79; TSS: 42,96mg/l, total solids:119,52mg/l, conductivity:153,09us/ cm and COD: 9,80mg/l. Calcium and magnesium in leachate differed significantly from control. Metals in leachate and control showed no significant differences except for iron (5,27; 0,82mg/l); manganese (2,31; 0,04mg/l) and cadmium; (0,157; 0,03mg/l). Lead, copper, zinc, chromium and nickel were not significantly different from control. Chloride (597,98; 5,24mg/l), nitrate (12,3; 2,35mg/l) and sulphate – 118,86; 3,09mg/l) in leachate and control however differed significantly, phosphate was not detected. Ammonium correlated negatively with nitrate(-0,608) and sulphate(-0,676) p<0,05. Attenuation processes reduced contaminant levels. Similarities in metal content may be due to increased leachate pH which consequently reduced metal solubility. Suspended solids and chloride were parameters of concern. Nitrates and sulphates increased in the wet season probably due to ammonium oxidation reactions. There is minimal need for treatment. However, polishing of leachate effluent via physico-chemical methods may be considered. 2012 artículo científico 1659-4266 https://www.redalyc.org/articulo.oa?id=515651981007 en http://www.redalyc.org/revista.oa?id=5156 UNED Research Journal / Cuadernos de Investigación UNED application/pdf Universidad Estatal a Distancia UNED Research Journal / Cuadernos de Investigación UNED (Costa Rica) Num.1 Vol.4 |
| title | Physicochemical characterization of an artificial pond receiving leachate influx at Aba-Eku dumpsite, Ibadan, Nigeria |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Landfill treatment contaminants natural attenuation leachate characterization |
| url | https://www.redalyc.org/articulo.oa?id=515651981007 |