Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 95, Issue -, Pages S61-S65Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2011.06.044
Keywords
W frutescens; Adsorption; Metallic elements; Phosphate; Nitrate; Wastewater treatment
Categories
Funding
- European Membrane Institute
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A new adsorbent for removing metallic elements, nitrate and phosphate ions from municipal and industrial wastewaters has been investigated. This new adsorbent consists of micro-particles of dried Withania frutescens plant (<500 mu m). Batch experiments were conducted to evaluate the removal of metallic elements and anions from raw wastewaters by W. frutescens particles. The results show that the micro-particles of W. frutescens plant presented a good adsorption of metallic elements, nitrate and phosphate ions from both real wastewaters. This adsorption increased with increasing of contact time. The percentage of metallic elements removal from industrial wastewater by W. frutescens plant was 98 similar to 99% for Pb(II), 92 similar to 93% for Cd(II), 91 similar to 92% for Cu(II) and 92 similar to 93% for Zn(II). The maximum adsorption capacity was dependent on the type of ions. The results also indicate that the values of chemical oxygen demand (COD) decrease after the contact with W. frutescens particles. Based on the results it can be concluded that the dried W. frutescens plant appears to be an economical and environmentally friendly material for wastewater treatment. (C) 2011 Elsevier Ltd. All rights reserved.
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