Preparation and environmental toxicity of non-sintered ceramsite using coal gasification coarse slag

• Autorzy: Zhao Shenwei , Yao Linying , He Haibin , Zou Yiping , Hu Lei , Zhai Yujia , Yu Yajing , Jia Jianli

Identyfikatory

DOI

10.24425/aep.2019.127983

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

pollution; coal gasification coarse slag; waste control; non-sintered ceramsite; heavy metal fixation

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2019
• Tom: Vol. 45, no. 2
• Strony: 84--90
• Opis fizyczny: Bibliogr. 34 poz., tab., wykr.

Twórcy

autor

Zhao Shenwei

• School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China

autor

Yao Linying

• School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China

autor

He Haibin

• School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China

autor

Zou Yiping

• School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China

autor

Hu Lei

• Department of Civil Engineering, New Mexico State University, Las Cruces, United States

autor

Zhai Yujia

• Shanghai Municipal Engineering Design Institute (Group) CO., LTD, Shanghai, China

autor

Yu Yajing

• School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China

autor

Jia Jianli

• School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, China

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).