Organic matter, a critical factor to immobilize phosphorus, copper, and zinc during composting under various initial C/N ratios

文献类型： 外文期刊

第一作者： Wang, Lixia

作者： Wang, Lixia;Li, Yingxin;Yan, Baixing;Ou, Yang;Cui, Hu;Li, Yingxin;Cui, Hu;Prasher, Shiv O.;Cui, Yanru

作者机构：

关键词： Initial C/N; Fractions redistribution; Organic matter; Redundancy analysis

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2019 年 289 卷

页码：

收录情况： SCI

摘要： The status of heavy metals and the P fractions in compost affects their environmental risk. The present study investigated the effects of different initial carbon to nitrogen (C/N) ratios (15, 22, 27) on redistribution of Cu, Zn, and P fractions during composting. The results showed that the composting process transformed Cu, Zn and P from mobile fractions to more stable fractions. Compost with an initial C/N of 22 showed the most effective immobilization of Cu, Zn and P because of yielding greatest degree of polymerization. Multivariate statistical analysis identified organic matter as the most critical factor for explaining the redistribution of Cu, Zn, and P fractions in composting. However, the degree of organic matter degradation (organic matter content and Humic acid/Fulvic acid) better explained the change of bioavailability factor for Cu and the mobility of P during composting. This research provided guidance for providing technology to reduce environmental risk in compost.

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