Lead removal by a magnetic biochar derived from persulfate-ZVI treated sludge together with one-pot pyrolysis

Yi-di Chen; Shih-Hsin Ho; Dawei Wang; Zong-Su Wei; Jo-Shu Chang; Nan-Qi Ren

doi:10.1016/j.biortech.2017.09.125

Lead removal by a magnetic biochar derived from persulfate-ZVI treated sludge together with one-pot pyrolysis

Bioresour Technol. 2018 Jan:247:463-470. doi: 10.1016/j.biortech.2017.09.125. Epub 2017 Sep 20.

Authors

Yi-di Chen¹, Shih-Hsin Ho², Dawei Wang³, Zong-Su Wei⁴, Jo-Shu Chang⁵, Nan-Qi Ren¹

Affiliations

¹ State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China.
² State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China. Electronic address: stephen6949@hit.edu.cn.
³ Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23219, USA.
⁴ Wolfson Faculty of Chemical Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel.
⁵ State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China; Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan.

PMID: 28965077
DOI: 10.1016/j.biortech.2017.09.125

Abstract

In this study, a novel method to treat the persulfate-ZVI dewatered WAS by producing a magnetic biochar as an environmentally friendly biosorbent (nZVI-WSBC) to remove heavy metals (HMs) from wastewaters was proposed. The nZVI-WSBC exhibited good adsorption property of Pb²⁺ and the adsorption isotherm data were fitted well to Langmuir isotherm. Corresponding reaction kinetics fitted well with the pseudo second-order adsorption model. Notably, nZVI-WSBC was successfully used for efficient removal of HMs from real. This study comprehensively demonstrates the mechanisms between Pb²⁺ and nZVI-WSBC surfaces, providing a breakthrough in making a sustainable biosorbent from the dewatered iron-containing WAS.

Keywords: Adsorption isotherm and kinetics; Dewatered ion-containing biochar; Lead removal; Waste activated sludge; Zero-valent iron.

MeSH terms

Adsorption
Charcoal*
Lead*
Sewage*
Water Pollutants, Chemical

Substances

Sewage
Water Pollutants, Chemical
biochar
Charcoal
Lead