The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.
Microplastics in sewage sludge from the wastewater treatment plants in China
Abstract
Sludge disposal such as land application is suspected as a significant source of microplastic (MP) pollution in the environment. To examine such a hypothesis, the present study was conducted to investigate the occurrence of MPs in sludge by analyzing 79 sewage sludge samples collected from 28 wastewater treatment plants (WWTPs) in 11 Chinese provinces. MP concentrations in the sludge samples ranged from 1.60-56.4 × 103 particles per kilogram of dry sludge, with an average of 22.7 ± 12.1 × 103 particles per kilogram of dry sludge. Thereinto, the sludge-based MP contents were greater in eastern China than in western China and varied during different months. Their colors and types were mainly white (59.6%) and fibers (63%), respectively. Microscope Fourier Transform infrared spectroscopy revealed that most of MPs belonged to polyolefin, acrylic fibers, polyethylene and polyamide. Some WWTP parameters, such as servicing area, proportion of industrial wastewater, secondary treatment and sludge dewatering may have affected MP concentrations in sludge. Based on the total sludge production in China, the average amount of sludge-based MPs entering into natural environmental was estimated to be 1.56 × 1014 particles per year. The findings confirmed that sewage sludge discharge is an important source of MP pollution in the environment. Further evaluation of the associated environmental hazards with MPs is deemed necessary.
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Cites
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Cited by
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Self-citationEvidence of microplastic accumulation in agricultural soils from sewage sludge disposal
Corradini, F., Meza, P., Eguiluz, R., Casado, F., Huerta-Lwanga, E., & Geissen, V. (2019) · Science of The Total Environment · doi:10.1016/j.scitotenv.2019.03.368 · Cited by 1,436
Source, migration and toxicology of microplastics in soil
Guo, J.-J., Huang, X.-P., Xiang, L., Wang, Y.-Z., Li, Y.-W., Li, H., Cai, Q.-Y., Mo, C.-H., & Wong, M.-H. (2020) · Environment International · doi:10.1016/j.envint.2019.105263 · Cited by 1,211
Environmental source, fate, and toxicity of microplastics
Wang, C., Zhao, J., & Xing, B. (2021) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2020.124357 · Cited by 1,077
Microplastics in soil: A review on methods, occurrence, sources, and potential risk
Yang, L., Zhang, Y., Kang, S., Wang, Z., & Wu, C. (2021) · Science of The Total Environment · doi:10.1016/j.scitotenv.2021.146546 · Cited by 907
Metadata
- Authors
- Li, X., Chen, L., Mei, Q., Dong, B., Dai, X., Ding, G., & Zeng, E. Y.
- Venue
- Water Research
- Publisher
- Elsevier BV
- Published
- 2018-10
- Volume
- 142
- Pages
- 75-85
- ISSN
- 0043-1354 (ISSN-L)
- OpenAlex
- W2806646530
- Cited by
- 1,031
- References
- 11
- FWCI
- 27.22
- Type
- journal article
- Language
- en
- Open access
- closed
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