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Understanding and mitigating the distinctive stresses induced by diverse microplastics on anaerobic hydrogen-producing granular sludge

Journal of Hazardous Materials 2022 15 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.

Yuting Zhang, Yuting Zhang, Wei Wei, Wei Wei, Wei Wei, Yuting Zhang, Yuting Zhang, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Chen Wang, Yuting Zhang, Yuting Zhang, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Yuting Zhang, Bing‐Jie Ni Wei Wei, Yuting Zhang, Wei Wei, Chen Wang, Wei Wei, Chen Wang, Wei Wei, Wei Wei, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Yuting Zhang, Yuting Zhang, Yuting Zhang, Chen Wang, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Chen Wang, 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 Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Chen Wang, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yuting Zhang, Bing‐Jie Ni Wei Wei, Bing‐Jie Ni

Summary

Researchers compared how polyethylene, PET, and PVC microplastics differentially stress anaerobic hydrogen-producing granular sludge, finding that PVC caused the greatest inhibition of hydrogen production (reduced to 66.6% of control) due to its more toxic leachates. Adding biochar to the sludge mitigated MP-induced inhibition by adsorbing leached chemicals, restoring hydrogen production efficiency.

Polymers

PE PET PVC

Study Type Environmental

This work comparatively studied the different stress responses of anaerobic hydrogen-producing granular sludge (HPG) to several typical MPs in wastewater, i.e., polyethylene (PE), polyethylene terephthalate (PET), and polyvinyl chloride (PVC) MPs. A new approach to mitigating the inhibition caused by MPs based on biochar was then proposed. The results displayed that microbe in HPG had diverse tolerances to PE-MPs, PET-MPs and PVC-MPs, with the hydrogen production downgraded to 82.0 ± 3.2 %, 72.3 ± 2.5 % and 66.6 ± 2.3 % (p < 0.05) of control respectively, due to the distinct leachates toxicities and oxidative stress level induced by different MPs. The discrepant mitigation reflected in the hydrogen yields of biochar-based HPGs raised back to 88.7 ± 1.4 %, 85.3 ± 3.8 % and 88.5 ± 3.5 % of control. The MPs induced disintegrated granule morphology, fragile microbial viability and impaired defensive function of extracellular polymeric substances were restored by biochar. The effective mitigation was revealed to be due to the strong adsorption of MPs by biochar, reducing direct contact between microbes and MPs. Biochar addition also enhanced protection for HPG by increasing EPS secretion and weakened the oxidative damage to anaerobes induced by MPs. Biochar manifested the disparate adsorption properties of three MPs. The most superior mitigation in HPG contaminated by PVC-MPs was attributed to the strongest affinity of biochar to PVC-MPs and effective alleviation of PVC leachates toxicity.

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