数字农科院2.0

Changes In Arsenic And Copper Bioavailability And Oxytetracycline Degradation During The Composting Process

文献类型： 外文期刊

作者： Shehata, E; Liu, YW; Feng, Y; Cheng, DM; Li, ZJ

作者机构：

关键词： Composting; Otc Degradation; Heavy Metal(Loid)S; Bioavailability; Germination Index

期刊名称： MOLECULES

ISSN：

年卷期： 2019 年 24 卷 23 期

页码：

收录情况： JCR（2021版）

摘要： This research focuses on the effects of the composting process on oxytetracycline antibiotic degradation and the bioavailability of arsenic and copper. A compost experiment was conducted using cow and pig manure contaminated with oxytetracycline, and copper and arsenic salts. The changes in physicochemical properties, oxytetracycline concentration, and the germination index were measured. Copper and arsenic were estimated by sequential chemical extraction. We also detected the effects of compost properties, oxytetracycline concentration, and heavy metal (loid)s on the germination index through simple regression analysis. The results showed that the composting process positively and significantly affected heavy metal(loid)s bioavailability, oxytetracycline degradation, and the germination index. Oxytetracycline concentration declined in all treatments, and the decline was more evident in cows' manure. The copper and arsenic bioavailable fraction decreased significantly, while the low bioavailability fraction increased. The germination index increased above 50%, which showed that the compost was free of toxic substances. This result also showed that the compost properties had the most significant impact on the germination index, and their regression had the highest R-2 values (0.84 and 0.99) in the cow and pig manure treatments, respectively. In conclusion, the composting process provides an economical method for oxytetracycline degradation and heavy metal(loid)s bioavailability reduction.

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