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Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting

Open access
Zhang, Junya, Chen, Meixue, Sui, Qianwen, Tong, Juan, Jiang, Chao, Lu, Xueting, Zhang, Yuxiu, Wei, Yuansong·2016·Water Research

Abstract

Composting is commonly used for the treatment and resource utilization of sewage sludge, and natural zeolite and nitrification inhibitors can be used for nitrogen conservation during sludge composting, while their impacts on ARGs control are still unclear. Therefore, three lab-scale composting reactors, A (the control), B (natural zeolite addition) and C (nitrification inhibitor addition of 3,4-dimethylpyrazole phosphate, DMPP), were established. The impacts of natural zeolite and DMPP on the levels of ARGs were investigated, as were the roles that heavy metals, mobile genetic elements (MGEs) and the bacterial community play in ARGs evolution. The results showed that total ARGs copies were enriched 2.04 and 1.95 times in reactors A and C, respectively, but were reduced by 1.5% in reactor B due to the reduction of conjugation and co-selection of heavy metals caused by natural zeolite. Although some ARGs (blaCTX-M, blaTEM, ermB, ereA and tetW) were reduced by 0.3-2 logs, others (ermF, sulI, sulII, tetG, tetX, mefA and aac(6')-Ib-cr) increased by 0.3-1.3 logs after sludge composting. Although the contributors for the ARGs profiles in different stages were quite different, the results of a partial redundancy analysis, Mantel test and Procrustes analysis showed that the bacterial community was the main contributor to the changes in ARGs compared to MGEs and heavy metals. Network analysis determined the potential host bacteria for various ARGs and further confirmed our results.

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Metadata

Authors
Zhang, J., Chen, M., Sui, Q., Tong, J., Jiang, C., Lu, X., Zhang, Y., & Wei, Y.
Venue
Water Research
Publisher
Elsevier BV
Published
2016-03
Volume
91
Pages
339-349
ISSN
0043-1354 (ISSN-L)
OpenAlex
W2239975387
Cited by
320
References
44
FWCI
17.31
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting. https://app.cochat.ai/papers/10.1016/j.watres.2016.01.010
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Zhang, J., Chen, M., Sui, Q., Tong, J., Jiang, C., Lu, X., Zhang, Y., & Wei, Y. (2016). Impacts of addition of natural zeolite or a nitrification inhibitor on antibiotic resistance genes during sludge composting. Water Research. https://doi.org/10.1016/j.watres.2016.01.010

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