Effect of biochar addition on copper and zinc passivation pathways mediated by humification and microbial community evolution during pig manure composting

Ling Zhou; Jiao Xue; Yang Xu; Wenxin Tian; Guowei Huang; Liqian Liu; Yingchao Zhang

doi:10.1016/j.biortech.2023.128575

Effect of biochar addition on copper and zinc passivation pathways mediated by humification and microbial community evolution during pig manure composting

Bioresour Technol. 2023 Feb:370:128575. doi: 10.1016/j.biortech.2023.128575. Epub 2023 Jan 2.

Authors

Ling Zhou¹, Jiao Xue¹, Yang Xu², Wenxin Tian³, Guowei Huang³, Liqian Liu³, Yingchao Zhang⁴

Affiliations

¹ Modern Agricultural Engineering Key Laboratory at Universities of Education Departmentof Xinjiang Uygur Autonomous Region, and School of Mechanical Electrification Engineering, Tarim University, Alaer 843300, China.
² Modern Agricultural Engineering Key Laboratory at Universities of Education Departmentof Xinjiang Uygur Autonomous Region, and School of Mechanical Electrification Engineering, Tarim University, Alaer 843300, China; Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, and the Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
³ Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, and the Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
⁴ Modern Agricultural Engineering Key Laboratory at Universities of Education Departmentof Xinjiang Uygur Autonomous Region, and School of Mechanical Electrification Engineering, Tarim University, Alaer 843300, China; Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, and the Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China. Electronic address: zhangyc@ysu.edu.cn.

PMID: 36603753
DOI: 10.1016/j.biortech.2023.128575

Abstract

The mobility and bioavailability of Cu and Zn are the main threats associated with the land application of pig manure (PM) compost products. This study investigated the impacts of biochar (BC) concentration on passivation of Cu and Zn associated with the compost maturity. The results indicated that 15% and 10% BC favoured the passivation of Cu and Zn, respectively. BC promoted passivation of Cu by accelerating HA production and optimized the abundance of Firmicutes. BC promoted the passivation of Zn by increasing the high temperature peak and the corresponding pH (8-8.5). A higher level (15% and 20%) of BC altered the dominant bacterial phylum from Firmicutes to Proteobacteria. 20% BC inhibited the passivation of Cu and Zn by reducing the highest temperature and lowering the alkalinity of substrate. These results offer new insights into understanding how the addition of BC could reduce the risk of hazardous products during PM composting.

Keywords: Biochar; Compost; Cu and Zn; Microbial community.

MeSH terms

Animals
Charcoal
Composting*
Copper
Manure / microbiology
Metals, Heavy* / analysis
Microbiota*
Organic Chemicals
Soil
Swine
Zinc

Substances

Copper
Zinc
biochar
Manure
Soil
Charcoal
Organic Chemicals
Metals, Heavy