摘要
采用共沉淀法制备Cu-Zn-Fe型层状双氢氧化物(Cu-Zn-Fe-LDH),并与过氧化钙(CaO_(2))进行复合,得到基于CaO_(2)的Cu-Zn-Fe-LDH(Cu-Zn-Fe-LDH-CaO_(2))复合材料,通过XRD、FTIR、TEM对其进行表征;以亚甲基蓝为模型污染物考察复合材料的降解性能,对降解条件进行优化。结果表明,在复合材料用量为50 mg、亚甲基蓝初始浓度为6 mg·L^(-)1、溶液pH值<3、KH_(2)PO_(4)用量为10 mg时,降解效果最佳。CaO_(2)溶解过程对H_(2)O_(2)的释放和类Fenton反应起到一定调节作用,以CaO_(2)取代H_(2)O_(2)可减少氧化剂的流失及其对环境产生的不利影响。
We firstly prepared Cu-Zn-Fe type layered dihydroxides(Cu-Zn-Fe-LDH)by a co-precipitation method,then mixed it with calcium peroxide(CaO_(2))to obtain Cu-Zn-Fe-LDH composite based on CaO_(2)(Cu-Zn-Fe-LDH-CaO_(2)),and characterized the composite by XRD,FTIR,and TEM.Moreover,using Methylene Blue(MB)as a pollutant model,we investigated the degradation performance of the composite,and optimized the degradation conditions.The results show that the degradation effect is the best under the optimal degradation conditions as follows:the composite dosage is 50 mg,the MB initial concentration is 6 mg·L^(-1),the solution pH value is less than 3,and the KH_(2)PO_(4)dosage is 10 mg.The dissolution process of CaO_(2)plays a certain role in the regulation of H_(2)O_(2)release and Fenton-like reaction.The replacement of H_(2)O_(2)by CaO_(2)can reduce the loss of oxidant and its adverse effects on the environment.
作者
钟书华
伍梓芃
何瑜
宋功武
ZHONG Shuhua;WU Zipeng;HE Yu;SONG Gongwu(Ezhou Ecological and Environmental Monitoring Center,Department of Ecology and Environment of Hubei Province,Ezhou 436000,China;School of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)
出处
《化学与生物工程》
CAS
2021年第5期63-67,共5页
Chemistry & Bioengineering
