螃蟹壳生物炭修复铬污染土壤效果研究

The Effect of Crab Shell Biochar in Remediation of Chromium-Contaminated Soil

土壤铬污染问题出现在多种含铬原辅料使用行业企业的地块,开展相应污染修复技术研究具有重要的现实意义。本文选择了废弃螃蟹壳作为土壤铬污染治理修复药剂的原材料,按照典型的废弃生物质热解改性方式对废弃螃蟹壳进行了改性处理,并对改性后材料的治理修复效果进行了研究。结果表明制备的螃蟹壳生物炭具有稳定化铬以及还原Cr(Ⅵ)的效果,其中按照6%投加C400时可以将铬的浸出总量下降73.4%,按6%投加C600时可以将浸出液中Cr(Ⅵ)的比例减少至39.0%。

The problem of soil chromium pollution occurs in a variety of chromium-related industries and enterprise plots,and it is of great practical significance to carry out corresponding pollution remediation technologies.In this paper,waste crab shells were selected as raw materials for chromium pollution control and remediation agents,and the waste crab shells were modified according to the typical method of pyrolysis modification of waste biomass.The treatment and remediation effects of the modified materials were studied.The results show that the corresponding prepared crab shell biochar has the effect of stabilizing chromium and reducing hexavalent chromium.The total amount of chromium leaching can be reduced by 73.4%when C400 is added at 6%.The proportion of hexavalent chromium was reduced to 39.0%when C600 is added at 6%.