03997nas a2200445 a 4500 20260817161559.0 220131s2021 th uu m rtt 0| a1eng d .b12378136 AIT RSPR no.MPA-21-32 Thanan Watcharamai Adsorption capacity of metals on microplastics in freshwater environment Pathum Thani, Thailand : Asian Institute of Technology, 2021 44 leaves : ill. Research studies project report ; no. MPA-21-32 A research study submitted in partial fulfillment of the requirements for the degree of Master in Marine Plastics Abatement Research studies project report (M.) - Asian Institute of Technology, 2021 Microplastics can cause many problems to the marine and freshwater environments. They have plenty of surface area, high hydrophobic ability, and great approach to interact with microorganisms. With those properties, pollutants and contaminants could be attached by microplastics and/or be carried on their surface. From these reasons, microplastics and their attached pollutants can be distributed around the world, and causing complex toxic compounds or substances to the aquatic living animals, and transmitted along throughout the food chain. This research study aims to quantify the adsorption capacity of metals, chromium (Cr), copper (Cu), and lead (Pb), on different microplastics types, polypropylene (PP) and polystyrene (PS), and to compare and analyze the adsorption behavior and kinetic mechanism of metals in freshwater environment. The freshwater was sampled at 14:00 hours on the 21st of May 2021 at the canal between the AIT Library and School of Environment, Resources and Development (SERD) in Asian Institute of Technology, Thailand. The water properties, temperature, pH, EC, TDS, salinity, and resistivity were 29.5 °C, 6.43, 500.9 æS/cm, 250.4 mg/L, 0.24 ppt, and 1997 ], respectively. In addition, the metal contents of chromium, copper, and lead in freshwater sample were 18.38, 11.14, <5.00 æg/L. The adsorption efficiency of metals on microplastics particles were sorted from most to least as copper, lead, and chromium, respectively. And more metal contents could adsorb on polystyrene more than on polypropylene. The adsorption behavior in this research study experiment in 12-day period was similar with the pseudo first order of kinetic model. The adsorption time which reached the equilibrium is tentatively 7-day time or a few days after 7-day time. Microplastics Environmental aspects Xue, Wenchao, Chairperson Chongrak Polprasert, Examination Committee Ekbordin Winijkul Examination committee Government of Japan, Scholarship Donor Asian Institute of Technology. Research studies project report ; no. MPA-21-32 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15777 .b12378136 mnait m 240419 0 220131 m b m 0 mnait mnait mnarc mnarc 67 40 20 Barcode : - CREATED : 2022-01-31 RECORD # : i13360942 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120884589 CREATED : 2022-05-13 RECORD # : i13378909 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121023096 CREATED : 2023-04-01 RECORD # : i13422017 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121023088 CREATED : 2023-04-01 RECORD # : i13422029 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 1817 1817 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT RSPR no.MPA-21-32 2026-08-17 16:15:59 2026-08-17 67 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT RSPR no.MPA-21-32 30050120884589 2026-08-17 16:15:59 1 2026-08-17 40 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT RSPR no.MPA-21-32 30050121023096 2026-08-17 16:15:59 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT RSPR no.MPA-21-32 30050121023088 2026-08-17 16:15:59 2 2026-08-17 20