04331nas a2200385 a 4500 20260818153815.0 100111s2009 th uu|m rtt 0| a1eng d .b12071997 AIT Thesis no.EV-09-14 Nang Htay Yin Lysimeter study on co-disposal of e-waste with municipal solid waste Pathum Thani, Thailand : Asian Institute of Technology, 2009 89 leaves : ill. + 1 online resource Thesis ; no. EV-09-14 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management Thesis (M.Sc.) - Asian Institute of Technology, 2009 E-waste or WEEE (waste from electrical and electronic equipment) becomes the fastest growing sector of solid waste stream in the world. Globally, 20-50 million tons of E-waste is generated each year, which accounts for 5% of all municipal solid waste (Cobbing, 2008). When the solid waste like E-waste containing large number of toxic chemicals is dumped with municipal solid waste (MSW), not only soil and groundwater can be badly contaminated. The study was conducted on the co-disposal of MSW with E-waste scrap in terms of lysimeter test. L-1 (lysimeter - 1) which is filled with solely MSW acts as control lysimeters whereas L-2 (lysimeter - 2) and L-3 (lysimeter - 3) are test lysimeters where the content of E-waste scrap is 20 % and 25 % (by weight) respectively. The lysimeters are operated with daily leachate recirculation, leachate characteristics, gas production and composition monitoring. Moreover, TCLP (Toxicity Characteristics Leaching Procedure) test is conducted to determine the leaching ability of heavy metals from E-waste scraps. No significant variations have been found out in the organic parameters of the leachate in all lysimeters. Even though L-3 which has the highest content of E-waste scrap is not much different from L-1 leachate characteristics. The concentration of the organic parameters are still increasing showing that waste is not stabilized yet. However, in terms of leaching, it has been found out that leaching greatly depend on the organic content. As L-3 has the lowest organic content whereas highest E-waste scraps content, it has less leached out for some heavy metals like Cu which leached out more in L-2 than in L-3. Moreover, Pb has the highest adsorption capacity because highest amount (172.4 mg/L) of lead leached in TCLP test; however, it is detected lowest in the leachate (0.44 - 0.61 mg/L) in all lysimeters. The leachability of heavy metals is different in TCLP test and lysimeter study. The leachability in all lysimeter can be presented as Fe > Zn > Ni > Cu > Pb > Cr > Hg. However, iri TCLP results, it is as Pb > Zn > Fe > Ni > Cu> Be > Cr > As > Cd. The leachability is different because the runtime of TCLP is only 18 hrs whereas in lysimeters is more than 5 months and in TCLP no media for heavy metals to occur adsorption where as it can happens in lysimeters due to MSW presence. Reduction in the sulphate amount and less concentration in the leachate shows that heavy metal precipitation in terms of sulphide form which is retained in the waste due to leachate recirculation. Waste electronic apparatus and appliances Visvanathan, C., Chairperson Nguyen, Thi Kim Oanh, Examination Committee Chart Chiemchaisri, Examination committee Asian Institute of Technology Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-09-14 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B02455 .b12071997 mnait u 240329 0 100111 m a u 0 mnait mnarc 22 40 Barcode : 30050120735088 CREATED : 2010-11-01 RECORD # : i1262679x LPATRON : 1021468 LCHKIN : 2010-11-19 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 1 Barcode : 30050160048681 CREATED : 2016-05-31 RECORD # : i13006320 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 70905 70905 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-09-14 30050120735088 2026-08-18 15:38:15 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-09-14 30050160048681 2026-08-18 15:38:15 2026-08-18 40