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Remediation
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Insights into catalytic removal and separation of attached metals from natural-aged microplastics by magnetic biochar activating oxidation process
Water Research2020
205 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 45
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Shujing Ye,
Shujing Ye,
Maocai Shen,
Yafei Zhang
Yafei Zhang
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Haipeng Wu,
Hailan Yang,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Shujing Ye,
Maocai Shen,
Shujing Ye,
Maocai Shen,
Shujing Ye,
Maocai Shen,
Shujing Ye,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Jie Liang,
Jie Liang,
Shujing Ye,
Biao Song,
Min Cheng,
Shujing Ye,
Biao Song,
Maocai Shen,
Biao Song,
Biao Song,
Maocai Shen,
Shujing Ye,
Shujing Ye,
Maocai Shen,
Biao Song,
Hailan Yang,
Shujing Ye,
Biao Song,
Hailan Yang,
Maocai Shen,
Xiaofei Tan,
Shujing Ye,
Xiaofei Tan,
Jie Liang,
Min Cheng,
Xiaofei Tan,
Hailan Yang,
Xiaofei Tan,
Shujing Ye,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Shujing Ye,
Shujing Ye,
Shujing Ye,
Shujing Ye,
Shujing Ye,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Yafei Zhang
Jie Liang,
Jie Liang,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Jie Liang,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Biao Song,
Xiaofei Tan,
Hailan Yang,
Min Cheng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Haipeng Wu,
Guangming Zeng,
Biao Song,
Haipeng Wu,
Guangming Zeng,
Guangming Zeng,
Maocai Shen,
Maocai Shen,
Guangming Zeng,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Maocai Shen,
Guangming Zeng,
Maocai Shen,
Guangming Zeng,
Haipeng Wu,
Haipeng Wu,
Maocai Shen,
Jie Liang,
Maocai Shen,
Maocai Shen,
Biao Song,
Maocai Shen,
Guangming Zeng,
Maocai Shen,
Shujing Ye,
Maocai Shen,
Guangming Zeng,
Shujing Ye,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Hailan Yang,
Biao Song,
Guangming Zeng,
Guangming Zeng,
Shujing Ye,
Maocai Shen,
Maocai Shen,
Xiaofei Tan,
Shujing Ye,
Xiaofei Tan,
Guangming Zeng,
Guangming Zeng,
Biao Song,
Guangming Zeng,
Jie Liang,
Jie Liang,
Jie Liang,
Shujing Ye,
Xiaofei Tan,
Biao Song,
Jiaqi Liu,
Shujing Ye,
Xiaofei Tan,
Hailan Yang,
Xiaofei Tan,
Xiaofei Tan,
Yafei Zhang
Jie Liang,
Jie Liang,
Guangming Zeng,
Guangming Zeng,
Guangming Zeng,
Yafei Zhang
Summary
A magnetic biochar material activated persulfate to degrade the organic layer on aged microplastics, releasing bound metals like lead and then re-adsorbing them from solution for magnetic separation. The approach demonstrates a combined oxidation and adsorption strategy for removing hazardous metals associated with microplastics in contaminated water.
Natural-aged microplastics with changed surface properties accumulate, redistribute and spread in all water fields as carriers of hazardous substances. The combined hazard of co-contamination of microplastics and hazardous substances expands the ecological risks, which urgently needs to design treatment schemes for pollutant removal from microplastics. In this paper, a facile and applicable magnetic biochar with porosity and graphitization (PGMB) was prepared for realizing the goal of metal removal from the microplastics. Heterogeneous catalysis of persulfate (PS) activated by PGMB achieved the decomposition of organics, with the decrease of more than 60% of the attached Pb on the surface of microplastics, and the adsorbed metal amount by PGMB in this system (31.29 mg/g) is much higher than that by the individual PGMB group (7.07 mg/g). Analysis demonstrated that the organic layer covered on the microplastic surface over the long-term weathering provided the key sites for metal sorption, whose decomposition and peeling were the critical steps in whole process. The prepared PGMB was responsible for activating PS to produce reactive species for decomposing the organic matter accompanied with detaching metals from microplastic surface, also would keep the role for re-adsorption of the released metals and separation from aqueous phase by magnetic force. The influences of natural environmental factors including salinity, common matrix species, and temperature on the performance of PGMB/PS system for metal removal from microplastics were discussed to illustrate the universality of the scheme in saline or organic-rich waters. The results of this study provided underlying insights for removing metals from microplastic surface, and decreasing the harm risks in the co-contamination of microplastics and hazardous substances.