02947nas a2200241 a 450000500170000000800410001703500150005810000240007324500770009726000670017430000220024149000540026350001280031750200790044552018160052465000410234070000340238170000480241570000470246371000440251081000860255485600650264020260817161559.0220131s2021    th uu m rtt   0|  a1eng d  a.b123781360 aThanan Watcharamai 10aAdsorption capacity of metals on microplastics in freshwater environment  aPathum Thani, Thailand :bAsian Institute of Technology,c2021  a44 leaves :bill.1 aResearch studies project report  ;vno. MPA-21-32  aA research study submitted in partial fulfillment of the requirements for the degree of Master in Marine Plastics Abatement  aResearch studies project report (M.) - Asian Institute of Technology, 2021  aMicroplastics 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.        0aMicroplasticsxEnvironmental aspects1 aXue, Wenchao,eChairperson   0 aChongrak Polprasert,eExamination Committee0 aEkbordin WinijkuleExamination committee  2 aGovernment of Japan,eScholarship Donor2 aAsian Institute of Technology.tResearch studies project report  ;vno. MPA-21-32  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B15777