03407nam a2200409 4500 20260818113305.0 011298s1987 th r 0000|00eng d .b10269642 AIT Thesis no. EV-87-5 Phontong Sujiwatthana Factors affecting solidification of hazardous waste materials Bangkok : Asian Institute of Technology, 1987 48 p. Thesis ; no. EV-87-5 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1987 A cement-silica based technique, one of the solidification processes was studied for waste stabilization. Experiments were conducted in laboratory with four types of hazardous wastes including cadmium (Cd), lead (Pb), aldrin (AD) and chlordane (OHM). Effects of several factors on leachability and compressive strength of solidified mixture were investigated. Portland cement was used to mix with the waste for solidification. The factors studied were the amount of hazardous waste added, water/cement ratio, surface area/volume ratio, pH of extract solution and curing time of solidified samples . Samples were extracted with acidified solution following the extraction procedure. The amount of hazardous waste in leachate was found proportional to the initial amount of waste in a solidified sample. Increase of surface area/volume ratio of solidified sample or decrease in pH of extract solution increased the amount of leached waste. Increase of curing time did not much affect the amount of leached waste but increased the compressive strength mostly until 28 days. When the water/cement ratio was 0.5, amount of leached waste was the least but the sample had the most compressive strength. Also the greatest compressive strength was obtained when the l east amount of hazardous waste was added. Maximum allowable amount of waste to be added in solidification was estimated by modelling techniques . Also the treatment cost per unit we ight of waste was calculated for practical application. Salvage (Waste, etc.) Shin, H. S., Chairperson Chongrak Polprasert, Examination Committee Samorn Muttamara, Examination Committee French Government, Examination Committee Asian Institute of Technology. Thesis ; no. EV-87-5 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19199 .b10269642 mnait x 241101 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050120748461 CREATED : 1994-05-17 RECORD # : i10332005 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003043659 CREATED : 1994-05-17 RECORD # : i10332017 LPATRON : 1012587 LCHKIN : 1998-01-09 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 0 Barcode : 30050120223903 CREATED : 2016-09-05 RECORD # : i12973099 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 42887 42887 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-87-5 30050120748461 2026-08-18 11:33:05 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-87-5 30050003043659 2026-08-18 11:33:05 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. EV-87-5 30050120223903 2026-08-18 11:33:05 2026-08-18 40