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Transport and Retention of Microplastics in Saturated Porous Media with Peanut Shell Biochar (PSB) and MgO-PSB Amendment: Co-Effects of Cation and Humic Acid
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Transport and retention of microplastics in saturated porous media with peanut shell biochar (PSB) and MgO-PSB amendment: Co-effects of cations and humic acid
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Researchers investigated how humic acid and monovalent and divalent cations (sodium and calcium) interact to control microplastic transport through biochar-amended porous media, finding that MgO-modified peanut shell biochar retained 75.5% of incoming microplastics versus 34.2% for unamended sand. Calcium ions dominated over humic acid at higher ionic strength, while in sodium solutions humic acid was the primary control on transport.
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