Utilization of alum sludge as adsorbent for phosphorus removal in municipal wastewater: A review
| Autor: | Innocent Nhapi, Norah Muisa, Mercy M. Manyuchi, Walter Ruziwa |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Alum
Process Chemistry and Technology Phosphorus chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Reuse Pulp and paper industry complex mixtures 01 natural sciences chemistry.chemical_compound Adsorption 020401 chemical engineering chemistry Wastewater Aluminium Environmental science Water treatment 0204 chemical engineering Safety Risk Reliability and Quality Literature survey Waste Management and Disposal 0105 earth and related environmental sciences Biotechnology |
| Zdroj: | Journal of Water Process Engineering. 35:101187 |
| ISSN: | 2214-7144 |
| DOI: | 10.1016/j.jwpe.2020.101187 |
| Popis: | Aluminium sulphate is the commonest and most widely used coagulant for water treatment worldwide. Aluminium is a well-known adsorbent for phosphorous (P), a nutrient highly associated with eutrophication in most water bodies. Thus, this paper provides a review on P adsorption from aqueous media using alum sludge waste material generated by water treatment plants that use aluminium sulphate as sole coagulant. A meta-analysis of data on characteristics of various alum sludges was done. The hindrance factors and adsorption capacities, under varying operating conditions are presented, including future direction. It is evident from literature survey that there is the emerging shift from reuse and recycling of raw alum sludge towards synthesis of value-added alum sludge based adsorbents. Possibilities to improve efficacy as both filter media and adsorbent but at the same time reducing metal leaching are highlighted. Value-added products may also offer an added advantage of acting as source of phosphorous for possible reuse in agricultural soils. |
| Databáze: | OpenAIRE |
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