04102nas|a2200421 a 4500 20260817172042.0 060913s2006 th uu|m rtt 0| a1eng d .b11992748 AIT Thesis no.EV-06-6 Chatinai Chusai Cadmium remobilization from contaminated soil : a case study in Maesot District, Tak Province, Thailand Pathum Thani, Thailand : Asian Institute of Technology, 2006 84 leaves : ill. Thesis ; no. EV-06-6 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering Inter-University Program on Environmental Toxicology, Technology and Management, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 2006 Highly cadmium contamination in Maesot district, Tak province of Thailand had revealed by the study of the International Water Management Institute (IMWI) in 1998. Rice and water supply from this area have the concentration of cadmium higher than the standard. In this study the concentration of cadmium contaminated in the soil was measured by Inductively Coupled Plasma Optical Emission Spectrometer, and the average value of cadmium concentration in the soil is 26.64 mg/Kg. This value is eight times higher than the standard value for cadmium concentration allowed in any agriculture soil which is set at 3 mg/Kg. Not only the soil, but also the crops from this area which were determined the concentration of cadmium in their biomass. For corn seed and green bean, the concentration of cadmium in the edible parts were not detectable. However, in the edible part of leafy vegetables the average value is higher than the standard value for cadmium contamination allowed in food and additives which is set at 0.2 mg/Kg. Environmental conditions likes pH value, Oxidation Reduction Potential and organic matter in the soil are the main parameters which could change the form of metal fraction of cadmium to the mobile form. The accumulation of cadmium in mobile form decrease in order; leafy vegetables > root vegetables > grain crops. So, the crops that should he allowed to produce in this area are grain crops like corn and bean A lab scale of cadmium remobilizing test (remediation potential) was also carried out using cadmium contaminated soil by lowering the soil pH from 7 to 4. Soil acidification has proved to influence cadmium transportation and induced speciation changed from insoluble fraction to soluble fraction which are more solubility and easily remobilized. Cadmium was removed from the contaminated soil from 3 ppm down to 0.5 ppm which is accounted for 83% cadmium removal. Thus the soil become clean and having cadmium in a safety range for agriculture Cadmium Soil pollution Thailand Tak Preeda Pakpian, Chairperson Visvanathan, C., Examination Committee Jutamad Satayavivad, Examination committee Chulabhorn Research Institute Mahidol University AIT Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-06-6 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B10831 .b11992748 mnait u 240401 0 060913 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120748420 CREATED : 2005-04-16 RECORD # : i12495827 LPATRON : 1018284 LCHKIN : 2009-11-13 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 6 TOT RENEW : 1 Barcode : 30050120748412 CREATED : 2005-04-16 RECORD # : i12495839 LPATRON : 1018284 LCHKIN : 2008-11-18 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 8 TOT RENEW : 8 Barcode : 30050160050372 CREATED : 2016-05-25 RECORD # : i12991752 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 14607 14607 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-06-6 30050120748420 2026-08-17 17:20:42 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-06-6 30050120748412 2026-08-17 17:20:42 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-06-6 30050160050372 2026-08-17 17:20:42 2026-08-17 40