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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Gut & Microbiome Remediation Sign in to save

The changes of microplastics’ behavior in adsorption and anaerobic digestion of waste activated sludge induced by hydrothermal pretreatment

Water Research 2022 57 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Chao Jiang, Xiaowei Zheng, Xiaowei Zheng, Xiaowei Zheng, Bing‐Jie Ni Bing‐Jie Ni Xiaowei Zheng, Xiaowei Zheng, Xiaowei Zheng, Chao Jiang, Bei Lü, Bei Lü, Xiaowei Zheng, Xiaowei Zheng, Chao Jiang, Chao Jiang, Xiaowei Zheng, Bing‐Jie Ni Xiaowei Zheng, Xiaowei Zheng, Yalei Zhang, Bing‐Jie Ni Bing‐Jie Ni Yalei Zhang, Xiaowei Zheng, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bei Lü, Chao Jiang, Bei Lü, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Gang Luo, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yalei Zhang, Yalei Zhang, Yalei Zhang, Shicheng Zhang, Zheng Chen, Shicheng Zhang, Bing‐Jie Ni Yang Gao, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yalei Zhang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Shicheng Zhang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yalei Zhang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yalei Zhang, Yalei Zhang, Yalei Zhang, Gang Luo, Gang Luo, Gang Luo, Yalei Zhang, Bing‐Jie Ni Shicheng Zhang, Gang Luo, Yalei Zhang, Yalei Zhang, Yalei Zhang, Yalei Zhang, Yalei Zhang, Gang Luo, Yalei Zhang, Yalei Zhang, Bing‐Jie Ni Bing‐Jie Ni Shicheng Zhang, Bing‐Jie Ni Yalei Zhang, Yalei Zhang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yalei Zhang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni

Summary

This study measured microplastic concentrations in the guts of juvenile Atlantic cod and haddock in the Gulf of Maine, finding particles in over 60% of individuals examined. Fibers were most common and the authors linked sources to fishing activity and coastal urbanization.

Polymers
PE PS PVC

Waste activated sludge (WAS) contains high concentrations of microplastics (MPs), which could serve as vectors of various organic pollutants and heavy metals, causing synergistic transportation and pollution. The application of combined hydrothermal pretreatment (HTP) and anaerobic digestion (AD) has raised growing concerns since the low-temperature hydrothermal treatment could enhance the biogas production of WAS. However, the changes in physicochemical properties, adsorption performances, and effects on AD of MPs by HTP have not been studied. The study used three typical MPs in WAS, and it was found that the HTP (170°C & 30min) increased MPs' specific surface area and carbonyl index (CI) while decreasing the relative crystallinity. The adsorption capacity to Cd increased through the carbonylation for polyethylene microplastic (PE-MP) and polystyrene microplastic (PS-MP) while decreasing by the dechlorination for polyvinyl chloride microplastic (PVC-MP). Meanwhile, increased hydrophilicity reduced the adsorption capacities of all three typical MPs for ofloxacin. The above results indicated that the HTP could be worth blocking the adsorption of polar MPs for polar pollutants. For the pristine MPs, only PVC-MP at the highest concentration (0.5 g kg VS) significantly (p < 0.05) reduced methane production by 16.2 ± 3.3% of WAS without the HTP. However, the HTP resulted in significant (p < 0.05) inhibition of methane production of WAS at high concentrations of PE-MP and PVC-MP (e.g., 0.1 and 0.5 g kg VS), which was due to the acceleration of the released toxic plastic additives (dibutyl phthalate, dimethyl phthalate, and bisphenol-A). Microbial analysis showed the abundances of vital anaerobes, such as acid-producing bacteria (Acetoanerrobium and Mesotoga), proteolytic bacteria (Proteiniborus), and methanogens (Methanosaeta) clearly decreased with the PE-MP and PVC-MP after the HTP, which might result in the decreased methane production. The study provided deep-insight of MPs' behaviors during the combined HTP-AD process.

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