Nanoplastics adsorption and removal efficiency by granular activated carbon used in drinking water treatment process
نویسندگان
چکیده
In this study Granular Activated Carbon (GAC) used in drinking water treatment processes is evaluated for its capacity to adsorb and remove polystyrene (PS) nanoplastics. Batch experiments are conducted ultrapure surface from Lake Geneva, currently as resources. Equilibrium kinetic studies understand adsorption mechanisms limiting factors. Our results show that the removal of PS nanoplastics mainly due electrostatic interactions between positively charged negatively GAC. It found increases with nanoplastic concentration a maximum 2.20 mg/g. The kinetics follows pseudo-second-order model indicates intra-particle diffusion not only rate-controlling step. Langmuir isotherm adsorbed homogeneous monolayer onto GAC 2.15 mg/g agreement experimental value. Geneva efficiency three times higher than increase significantly increasing 6.33 This improvement presence Dissolved Organic Matter (DOM), resulting charge modification, divalent ions making possible PS-DOM complexes, and, aggregation provide good correlation data. contrast, neither nor Freundlich isotherms describe satisfactory way by reveals produced renewable sources can be considered moderate adsorbent plants DOM cationic species play major role.
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2021
ISSN: ['0048-9697', '1879-1026']
DOI: https://doi.org/10.1016/j.scitotenv.2021.148175