한빛사논문
- 조회161
Namyeon Kim a, So Yoon Kim a, Seung-Woo Lee b, Eun-Hee Lee a
aDepartment of Microbiology, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, Republic of Korea
bDepartment of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Republic of Korea
Corresponding author : Eun-Hee Lee
Abstract
Microplastics are ubiquitous environmental contaminants, and concern about microplastics functioning as vectors for coexisting environmental contaminants has been increasing. In this study, we evaluated the potential of microplastics as a vector for microcystins (MCs) in an aquatic environment. Six microplastics-polyvinylidene chloride, polystyrene, polyamide-6 (PA-6), polyvinyl chloride, poly(ethylene terephthalate), and polyethylene-were used in the experiments, and the PA-6 microplastics showed strong affinity toward the cyanotoxin microcystin-leucine arginine (MC-LR) with an adsorption efficiency of 89.5 ± 0.1 %. The adsorption of MC-LR onto PA-6 microplastics was well described by the pseudo-first-order kinetics and Langmuir isotherm models, and the adsorption was considered to be driven mainly by polar-polar interactions. The maximum adsorption capacity (qm) of MC-LR onto PA-6 microplastics was estimated to be 85.64-129.05 μg per g of PA-6 microplastics. Coexisting ions of NaCl, MgSO4, KH2PO4, CaCO3, and Na2HPO4 marginally affected the adsorption of MC-LR onto the PA-6 microplastics. However, water-quality parameters of conductivity and total-nitrogen content in environmental freshwaters influenced the adsorption of MC-LR onto PA-6 microplastics. The adsorption capability of PA-6 microplastics was evaluated using extracellular MCs (i.e., MC-LR, MC-YR, MC-RR, and total MCs) released from Microcystis aeruginosa cells during their growth.
논문정보
- Research article
- 2023년 03월 (BRIC 등록일 2023-08-22)
- 국내 연구진
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