重金属在生物炭添加堆肥过程中的钝化效应：强调细菌群落。
The passivation effect of heavy metals during biochar-amended composting: Emphasize on bacterial communities.
机构信息
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Jilin Provincial Engineering Center of CWs Design in Cold Region & Beautiful Country Construction, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
出版信息
Waste Manag. 2020 Dec;118:360-368. doi: 10.1016/j.wasman.2020.08.043. Epub 2020 Sep 11.
Available information on passivation effect of biochar on heavy metals (HMs) through regulating bacterial communities remains limited. Thus, this study investigated the correlation between bacterial diversity and HM-fractions (Zn, Cu, Cd, Cr and Pb) during composting with different dose of biochar (5% and 10%, dry weight basis), in order to ascertain the passivation effect on HMs under the influence of bacterial community. The addition of 10% biochar showed better passivation effect with reduction in bioavailability factor (BF) of Zn, Cu, Cd and Pb by 4.10%, 44.12%, 18.75% and 30.06%, respectively. In addition, it brought forward the variation in primary bacterial phylum to the thermophilic phase. The results of redundancy analysis (RDA) and structural equation models (SEMs) indicated that C:N ratio was an important factor in controlling the morphological transformation of HM by affecting the bacterial community structure. Our results maybe provide a novel insight into HM-passivation from an interaction mechanism on C:N ratio and bacterial community.
有关生物炭通过调节细菌群落对重金属（HM）钝化效应的可用信息仍然有限。因此，本研究调查了不同剂量生物炭（5%和 10%，干重基础）在堆肥过程中细菌多样性与 HM 分数（Zn、Cu、Cd、Cr 和 Pb）之间的相关性，以确定在细菌群落影响下对 HM 的钝化效应。添加 10%的生物炭表现出更好的钝化效果，Zn、Cu、Cd 和 Pb 的生物有效性因子（BF）分别降低了 4.10%、44.12%、18.75%和 30.06%。此外，它使主要细菌门的变化提前到了高温阶段。冗余分析（RDA）和结构方程模型（SEM）的结果表明，C：N 比是通过影响细菌群落结构来控制 HM 形态转化的重要因素。我们的结果可能从 C：N 比和细菌群落的相互作用机制为 HM 钝化提供了新的见解。
Zotero 插件