1. Facile One-Pot Synthesis of Sustainable Carboxymethyl Chitosan – Sewage Sludge Biochar for Effective Heavy Metal Chelation and Regeneration.
- Author
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Ifthikar, Jerosha, Jiao, Xiang, Ngambia, Audrey, Wang, Ting, Khan, Aimal, Jawad, Ali, Xue, Qiang, Liu, Lei, and Chen, Zhuqi
- Subjects
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CHEMICAL synthesis , *CARBOXYMETHYL compounds , *CHITOSAN , *SEWAGE sludge , *BIOCHAR , *CHELATION - Abstract
In this paper, sewage sludge, a solid waste from wastewater treatment plant, which eagerly requires proper treatment was reused as solid support in the form of sewage sludge biochar, then modified with carboxymethyl chitosan to form a bio-adsorbent. Further, carboxymethyl chitosan coating on sewage sludge biochar improved carboxymethyl chitosan’s stability in water. The prepared bio-adsorbent revealed a shorter equilibrium time (<60 min) for Pb(II) adsorption and a superior capacity of 594.17 mg g −1 for Hg(II) adsorption, which are so far the best recorded performance achieved for chitosan based adsorbents. Additionally, the adsorbent was highly selective for heavy metal ions and it also presented a good stability and reusability for industrial applications. These outcomes demonstrate waste valorization through a green, facile and one-pot approach that turns the solid waste of sewage sludge into biochar adsorbent with propitious applications in the elimination of heavy metal ions from wastewater. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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