Porous biochar composite assembled with ternary needle-like iron-manganese-sulphur hybrids for high-efficiency lead removal

Fan Yang, Shuaishuai Zhang, Dong Wan Cho, Qing Du, Jingpeng Song, Daniel C.W. Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)

Abstract

Hierarchical porous biochar derived from corn straw containing ternary needle-like iron-manganese-sulphur composites (Fe-Mn-S@HCS) are fabricated, and their physicochemical characteristics and performance for Pb removal were examined in detail. Introduction of Mn (transition metal) into Fe-biochar composites can effectively alter the chemical state of Fe; simultaneous doping with S can enhance cation exchange for Pb removal. High uptake of Pb by Fe-Mn-S@HCS in a short time period was observed with the adsorption capacity of 181.5 mg g−1 and the pseudo-second-order rate constant of 0.075 g mg-1 h−1. Complexation, reduction, and precipitation were found to be involved in the Pb removal by Fe-Mn-S@HCS based on the results of HRTEM, XPS, and XRD analyses. This study demonstrated the feasibility of Fe-Mn-S biochar composites for high-efficiency Pb removal from aqueous solution.

Original languageEnglish
Pages (from-to)415-420
Number of pages6
JournalBioresource Technology
Volume272
DOIs
Publication statusPublished - Jan 2019

Keywords

  • Engineered biochar
  • Green/sustainable remediation
  • Lead complexation/precipitation
  • Metal-biochar composites
  • Waste valorization

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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