Highly Efficient Lead Distribution by Magnetic Sewage Sludge Biochar: Sorption Mechanisms and Bench Applications

Jerosha Ifthikar; Jia Wang; Qiliang Wang; Ting Wang; Huabin Wang; Aimal Khan; Ali Jawad; Tingting Sun; Xiang Jiao; Zhuqi Chen

doi:10.1016/j.biortech.2017.03.133

Highly Efficient Lead Distribution by Magnetic Sewage Sludge Biochar: Sorption Mechanisms and Bench Applications

Bioresour Technol. 2017 Aug:238:399-406. doi: 10.1016/j.biortech.2017.03.133. Epub 2017 Mar 31.

Authors

Affiliations

¹ Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
² Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
³ Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China; Department of Environmental Engineering, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
⁴ Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China. Electronic address: zqchen@hust.edu.cn.

PMID: 28458173
DOI: 10.1016/j.biortech.2017.03.133

Abstract

Highly efficient magnetic sewage sludge biochar (MSSBC) discloses feasible fabrication process with lower production cost, superior adsorption capacity, usage of waste sewage sludge as resource, selected by external magnetic field and exceptional regeneration property. 2gL^-1 MSSBC exhibited a high adsorption capacity of 249.00mgg^-1 in 200ppmPb(II) and the lead-MSSBC equilibrium was achieved within one hour, owing to the existence of the copious active sites. The adsorption kinetics was well described by the pseudo-second-order model while the adsorption isotherm could be fitted by Langmuir model. Mechanism study demonstrated the adsorption involved electrostatic attraction, ion exchange, inner-sphere complexation and formation of co-precipitates at the surface of MSSBC. Additionally, adsorption performance maintained remarkable in a broad pH window. These outcomes demonstrated the promising waste resource utilization by a feasible approach that turns the solid waste of sewage sludge into biochar adsorbent with auspicious applications in elimination of Pb(II) from wastewater.

Keywords: Adsorption; Biochar; Lead removal; Magnetic separation; Sewage sludge.

MeSH terms

Adsorption
Charcoal*
Hydrogen-Ion Concentration
Kinetics
Lead*
Sewage*

Substances

Sewage
biochar
Charcoal
Lead