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Vol.2 , No. 6, Publication Date: Nov. 10, 2015, Page: 79-85
 as Low Cost Adsorbent&description=Developing a low-cost effective phosphate absorbent is crucial for the control of water eutrophication. Drinking-water treatment alum sludge (DWT-AS) produced at water treatment plants is an unavoidable by-product. DWT-AS can be used for the effective removal and recovery of phosphate from wastewater. Adsorption of phosphate from wastewater by DWT-AS has been studied. The influence of various factors, such as initial pH, initial phosphate concentration, contact time and adsorbent dose on the removal efficiency was also studied in batch equilibration technique. Solution pH significantly influenced the sorption. Each sample achieved the maximal removal of phosphate at pH 5.0. Results showed that the removal percentages increased as the weight of sorbent increased. The study of the effect of contact time indicated that the removal percentages increase with increasing contact time. By increasing initial concentration of phosphate, the removal efficiency was decreased. The Freundlich and Langmuir models were used to simulate the sorption equilibrium. From the experimental data, the results indicate that both models are clearly best fitting isotherms with correlation coefficients greater than expected. The objective of this study is to demonstrate that DWT-AS can be employed as a highly effective natural adsorbent for phosphorus removal from wastewater and aqueous solutions.&picture=http://www.aascit.org/aascit/decorators/img/journal/905.jpg)
| [1] | N. Nawar, Department of Chemistry, Faculty of Science, El-Mansoura University, Mansoura, Egypt. |
| [2] | M. E. Ahmad, Water and Wastewater Company, Dakahliya, Egypt. |
| [3] | W. M. El Said, Water and Wastewater Company, Dakahliya, Egypt. |
| [4] | S. M. N. Moalla, Department of Chemistry, Faculty of Science, Port Said University, Port Said, Egypt. |
Developing a low-cost effective phosphate absorbent is crucial for the control of water eutrophication. Drinking-water treatment alum sludge (DWT-AS) produced at water treatment plants is an unavoidable by-product. DWT-AS can be used for the effective removal and recovery of phosphate from wastewater. Adsorption of phosphate from wastewater by DWT-AS has been studied. The influence of various factors, such as initial pH, initial phosphate concentration, contact time and adsorbent dose on the removal efficiency was also studied in batch equilibration technique. Solution pH significantly influenced the sorption. Each sample achieved the maximal removal of phosphate at pH 5.0. Results showed that the removal percentages increased as the weight of sorbent increased. The study of the effect of contact time indicated that the removal percentages increase with increasing contact time. By increasing initial concentration of phosphate, the removal efficiency was decreased. The Freundlich and Langmuir models were used to simulate the sorption equilibrium. From the experimental data, the results indicate that both models are clearly best fitting isotherms with correlation coefficients greater than expected. The objective of this study is to demonstrate that DWT-AS can be employed as a highly effective natural adsorbent for phosphorus removal from wastewater and aqueous solutions.
Keywords
Phosphate Removal, Adsorption, Drinking Water Treatment Alum Sludge
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