Red mud-modified biochar reduces soil arsenic availability and changes bacterial composition

Qi ZOU, Wenhui AN, Chuan WU, Wai Chin LI, Anqin FU, Ruiyang XIAO, Huikang CHEN, Sheng-Guo XUE

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15 Citations (Scopus)

Abstract

Worldwide arsenic (As) contamination in soils induces pollution of surface and ground waters, reduces crop quality and yield, and threatens human health. Biochar-based material has been proposed as ameliorants for contaminated soils. Here soil incubations were conducted to investigate the effects of biochar, red mud and red mud-modified biochar on the pH, total organic carbon content, sodium bicarbonate (NaHCO₃)-extractable As concentration and microbial community composition of As-contaminated soils. Results show red mud-modified biochar reduces the concentration of NaHCO₃-extractable As by 27%, whereas this concentration increases by 23% using biochar alone and 6% using red mud alone. Similar trends are observed for HCl-extractable As. The red mud and red mud-modified biochar treatments increased the relative abundance of Proteobacteria and its affiliated genera, such as Kaistobacter, Rhodanobacter and Rhodoplanes. Copyright © 2017 Springer International Publishing AG, part of Springer Nature.
Original languageEnglish
Pages (from-to)615-622
JournalEnvironmental Chemistry Letters
Volume16
Issue number2
Early online dateDec 2017
DOIs
Publication statusPublished - 2018

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Arsenic
arsenic
mud
Availability
Soils
Chemical analysis
soil
Soil pollution
Sodium Bicarbonate
soil pollution
Organic carbon
Surface waters
bicarbonate
total organic carbon
Crops
community composition
biochar
Groundwater
microbial community
relative abundance

Citation

Zou, Q., An, W., Wu, C., Li, W., Fu, A., Xiao, R., et al. (2018). Red mud-modified biochar reduces soil arsenic availability and changes bacterial composition. Environmental Chemistry Letters, 16(2), 615–622. doi: 10.1007/s10311-017-0688-1

Keywords

  • Arsenic
  • Biochar
  • Iron
  • Microbial community
  • Red mud
  • Soil