标题：Study of the effect of weathered coal activated by ultrasonic on speciation of Cr in soil
作者：Liu, Miao; Tang, Shi; Wang, Guojing; Xu, Yuxin; Zhang, Xue
作者机构：[Liu, Miao; Wang, Guojing; Xu, Yuxin] Shandong Agr Univ, Coll Resources & Environm, Tai An, Shandong, Peoples R China.; [Tang, Shi] China Natl Petr 更多
会议名称：4th International Conference on Energy Engineering and Environmental Protection (EEEP)
会议日期：NOV 19-21, 2019
来源：FOURTH INTERNATIONAL CONFERENCE ON ENERGY ENGINEERING AND ENVIRONMENTAL PROTECTION
摘要：The humic acid in weathered coal contains a large number of reactive functional groups which can stably combine with heavy metal ions in the environment. This changes its biochemical stability and water solubility, reducing the migration of heavy metal ions in the soil environment to achieve the purpose of remediation of heavy metal pollution. The goal of this paper is to investigate the effects of ultrasonic activated weathered coal on the speciation of chromium (Cr) in soil and bioavailability of Cr under pakchoi cultivation. The results showed that in comparison to the control group, both the content of exchangeable, reducible and oxidizable Cr and the absorption of Cr in the soil decreased after adding weathered coal. Under the conditions of 60g/kg of ultrasonic activated weathered coal, the content of Cr absorbed by pakchoi plants was the lowest, which was 62.0% lower than that of the control group. Additionally, the content of Cr in soil reached the maximum value, which was 12.7% higher than that of the control group. Cr mainly exists as a residual state in the environment and this was 755.8% higher than that of the control group. Under the same conditions of weathered coal addition, U-WC can significantly reduce the Cr content of the weak acid extracted, reducible and oxidizable fraction in the soil, and the effective Cr content is reduced, thereby reducing Cr migration and biotoxicity in soil. This provides a theoretical basis for the application of weathered coal humic acid fertiliser in the application of weathered coal fertiliser in Cr-polluted areas.