【摘要】 以菌糠为原料,选用廉价且环保的蟹壳为钙源,采用共沉淀法制备磁改性菌糠基富钙生物炭（Fe₂O₃/CSSC）,并用于孔雀石绿（MG）的吸附研究。利用SEM、FTIR等技术进行表征并探讨其吸附机理。结果表明,Fe₂O₃/CS-SC对MG的去除率随吸附时间、吸附剂用量和初始pH的增加而增加,随MG初始浓度的增加而降低。吸附过程是自发和吸热的,表面扩散和颗粒内扩散同时进行,且符合准二级动力学和Langmuir吸附等温线模型。另外,Fe₂O₃/CS-SC具有良好的磁分离特质及再生稳定性。更多还原

【Abstract】 The magnetic modified calcium-rich biochar（Fe₂O₃/CS-SC） was prepared by co-precipitation method from fungus bran as raw material and cheap and environmentally friendly crab shell as calcium source,and was used for the adsorption of malachite green（MG）.The adsorption mechanism was studied by SEM and FTIR.The results showed that the removal rate of MG from Fe₂O₃/CS-SC increased with the increase of adsorption time,adsorbent dosage and initial pH,and decreased with the increase of initial MG concentration.The adsorption process is spontaneous and endothermic,and both surface diffusion and intra diffusion occur simultaneously,which conforms to the quasi-second-order kinetics and Langmuir adsorption isotherm model.In addition,Fe₂O₃/CSSC has good magnetic separation characteristics and regeneration stability.更多还原