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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. Environmental Sources Nanoplastics Sign in to save

Effect of Agricultural Organic Inputs on Nanoplastics Transport in Saturated Goethite-Coated Porous Media: Particle Size Selectivity and Role of Dissolved Organic Matter

Environmental Science & Technology 2022 125 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Xiaoxue Ouyang, Jie Ma, Yasir Arafat, Xiaoxue Ouyang, Yongtao Li, Xiaoxue Ouyang, Xiaoxue Ouyang, Xiaoxue Ouyang, Jie Ma, Xiaoxue Ouyang, Jie Ma, Yan Qiu, Yali Chen, Jie Ma, Jie Ma, Junying Zhao, Junying Zhao, Xiaoxue Ouyang, Xiaoxue Ouyang, Xiaoxue Ouyang, Xiaoxue Ouyang, Yali Chen, Junying Zhao, Xiaoxue Ouyang, Yali Chen, Xiaoxue Ouyang, Yujie Zhao Junying Zhao, Yujie Zhao Yujie Zhao Yongtao Li, Xiaoxue Ouyang, Jie Ma, Xiaoxue Ouyang, Liping Weng, Liping Weng, Liping Weng, Liping Weng, Liping Weng, Liping Weng, Jie Ma, Yujie Zhao Liping Weng, Liping Weng, Yasir Arafat, Yujie Zhao Liping Weng, Liping Weng, Yongtao Li, Yujie Zhao Liping Weng, Yongtao Li, Yongtao Li, Yongtao Li, Yujie Zhao Liping Weng, Yali Chen, Yali Chen, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yujie Zhao Yongtao Li, Yujie Zhao Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yongtao Li, Yujie Zhao

Summary

Researchers examined how dissolved organic matter from agricultural inputs like biochar, wheat straw, and swine manure affects nanoplastic transport through goethite-coated porous media, finding that DOM type and nanoparticle size selectively influence mobility.

The transport of nanoplastics (NPs) through porous media is influenced by dissolved organic matter (DOM) released from agricultural organic inputs. Here, cotransport of NPs with three types of DOM (biochar<sub>DOM</sub> (BC<sub>DOM</sub>), wheat straw<sub>DOM</sub> (WS<sub>DOM</sub>), and swine manure<sub>DOM</sub> (SM<sub>DOM</sub>)) was investigated in saturated goethite (GT)-coated sand columns. The results showed that codeposition of 50 nm NPs (50NPs) with DOM occurred due to the formation of a GT-DOM-50NPs complex, while DOM loaded on GT-coated sand and 400 nm NPs (400NPs) aided 400NPs transport due to electrostatic repulsion. According to the quantum chemical calculation, humic acid and cellulose played a significant role in 50NPs retardation. Owing to its high concentration, moderate humification index (HIX), and cellulose content, SM<sub>DOM</sub> exhibited the highest retardation of 50NPs transport and promoting effect on 400NPs transport. Owing to a high HIX, the effect of BC<sub>DOM</sub> on the mobility of 400NPs was higher than that of WS<sub>DOM</sub>. However, high cellulose content in WS<sub>DOM</sub> caused it to exhibit a 50NPs retardation ability that was similar to that of BC<sub>DOM</sub>. Our results highlight the particle size selectivity and significant influence of DOM type on the transport of NPs and elucidate their quantum and colloidal chemical-interface mechanisms in a typical agricultural environment.

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