TY - JOUR N2 - In this study, non-sintered ceramsite was prepared using coal gasification coarse slag obtained from a methanol plant. The basic performance and heavy metal leaching toxicity were analyzed. The results showed that seven out of nine non-sintered ceramsite groups were in accordance with the national standard of compressive strength (5 MPa), while only three groups met the national standard of water absorption index of less than 22%. The heavy metal concentrations in these three groups were found to be lower than that specified in National Class IV of surface water environment standards. The concentration of Cr was found to be 16.45 μg/L, which represents only 1% of the IV standard. The optimum mixing ratio, which showed high compressive strength (6.76 MPa) and low water absorption (20.12%), was found to be 73% coal gasification coarse slag, 15% cement, and 12% quartz sand. The characterization using Fourier transform infrared spectroscopy showed that the formation of gelatin in ceramsite enhances the performance of the ceramsite base and increases the immobilization of heavy metal. The study proved that the preparation of non-sintered ceramsite using coal gasification coarse slag reduces its environmental risk and achieves efficient utilization of the slag. Therefore, it can be concluded that it is a feasible and environmental friendly method for the disposal of coal slag. L1 - http://www.czasopisma.pan.pl/Content/111662/PDF/Archives%20vol%2045%20no%202%20a4_internet_10.pdf L2 - http://www.czasopisma.pan.pl/Content/111662 PY - 2019 IS - No 2 EP - 90 DO - 10.24425/aep.2019.127983 KW - pollution KW - coal gasification coarse slag KW - waste control KW - non-sintered ceramsite KW - heavy metal fixation A1 - Zhao, Shenwei A1 - Yao, Linying A1 - He, Haibin A1 - Zou, Yiping A1 - Hu, Lei A1 - Zhai, Yujia A1 - Yu, Yajing A1 - Jia, Jianli PB - Polish Academy of Sciences VL - vol. 45 DA - 29.05.2019 T1 - Preparation and environmental toxicity of non-sintered ceramsite using coal gasification coarse slag SP - 84 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/111662 T2 - Archives of Environmental Protection ER -