Bioleaching of silicon in electrolytic manganese residue (EMR) by Paenibacillus mucilaginosus: Impact of silicate mineral structures

Ying Lv, Jia Li, Hengpeng Ye, Dongyun Du, Peng Sun, Mengyu Ma, Tian C. Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Electrolytic manganese residue (EMR) is characterized by high silicon content, and thus, is an important silicon source. While considerable research has been conducted on bioleaching EMR for silicon recovery, sufficient information is not available on the impact of specific silicate mineral structures in EMR on silicon bioleaching. In the present study, the mineral composition of EMR was determined firstly, and then the leaching effect of Paenibacillus mucilaginosus on these different silicate minerals were investigated by shake flask experiments. Results showed that the silicon in EMR was mainly composed of quartz, sericite, muscovite, biotite, olivine and rhodonite; Paenibacillus mucilaginosus had a significantly different weathering and decomposition effects on different silicate minerals. Among them, sericite, muscovite and biotite with layered structure had the most obvious silicon leaching effect, followed by rhodonite with island structure, while silicon leaching from olivine with chained structure and quartz with frame structure was much more difficult. One can roughly judge the adaptability of bioleaching of silicon in EMR using Paenibacillus mucilaginosus if the main form of silicate minerals in EMR is determined.

Original languageEnglish (US)
Pages (from-to)127043
Number of pages1
JournalChemosphere
Volume256
DOIs
StatePublished - Oct 1 2020

Keywords

  • Available silicon
  • Bioleaching
  • Electrolytic manganese residue
  • Paenibacillus mucilaginosus
  • Silicate mineral

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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