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Assessment contributions of physicochemical properties and bacterial community to mitigate the bioavailability of heavy metals during composting based on structural equation models.

Abstract：

:The aim of this study was to explore the pathways to mitigate the bioavailability of heavy metals (HM) during chicken and beef cattle manures composting. For raw materials, HM contents in animal manures from breeding farm were 1.5-3 times as much as that of domestic animal manures. Structural equation models (SEMs) based on denaturing gradient gel electrophoresis (DGGE) showed that mitigating bioavailability of HM was mainly attributed to physicochemical properties (organic matters content and temperature) during beef cattle manures composting. However, both physicochemical properties (organic matters content, temperature, pH and moisture) and bacterial community were critical factors during chicken manures composting. Furthermore, the statistical analysis from high-throughput sequencing verified the results of SEMs. Therefore, the bioavailability of HM will be mitigated by different deactivation pathways according to diverse raw materials composting.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Chen X,Zhao Y,Zeng C,Li Y,Zhu L,Wu J,Chen J,Wei Z

doi

10.1016/j.biortech.2019.121657

subject

Has Abstract

pub_date

2019-10-01 00:00:00

pages

121657

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(19)30887-9

journal_volume

289

pub_type

杂志文章

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