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Experimental study on the performance of modified flocculant (PEI-T) for removal of turbidity and heavy metals from aqueous solution
- Source :
- Water Supply, Vol 21, Iss 5, Pp 2075-2083 (2021)
- Publication Year :
- 2021
- Publisher :
- IWA Publishing, 2021.
-
Abstract
- The current study was focused on the evaluation of the performance of a modified flocculant (PEI-T) for the removal of turbidity and heavy metals from wastewater. Thioglycolic acid was introduced into the molecular chain of cationic flocculant polyethyleneimine (PEI) through an amidation reaction to form a new flocculant PEI-T. Results revealed that: (a) PEI-T and PEI had similar turbidity removal effect, but PEI-T had a good function of catching heavy metal copper and mercury; (b) when Cu2+ and turbidity-causing substances coexist in a water sample, Cu2+ and turbidity-causing substances promote the removal of each other and the residual concentration of Cu2+ and turbidity decrease further; and (c) the presence of Ca2+ and Mg2+ can promote the removal of copper ions by PEI-T. HIGHLIGHTS Modified flocculant (PEI-T) was evaluated for removal of turbidity and heavy metals from wastewater.; Thioglycolic acid was introduced into the molecular chain of cationic flocculant polyethyleneimine (PEI) to form a new flocculant, PEI-T.; These flocculants had similar turbidity removal effect.; Cu2+ and turbidity-causing substances promote their removal when Cu2+ and turbidity-causing substances coexist.;
Details
- Language :
- English
- ISSN :
- 16069749 and 16070798
- Volume :
- 21
- Issue :
- 5
- Database :
- Directory of Open Access Journals
- Journal :
- Water Supply
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0a311afd73d4405381477b70e00a82a9
- Document Type :
- article
- Full Text :
- https://doi.org/10.2166/ws.2020.306