还原性有机酸络合铁负载活性炭纤维降解染料废水  

Degradation of dye wastewater by reductive organic acids coupled with ferric supported activated carbon fibers

作　　者：王文涛 赖欣婷 何旭斌 姚玉元[1] WANG Wentao;LAI Xinting;HE Xubin;YAO Yuyuan(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,Zhejiang,China;Zhejiang Longsheng Group Co.,Ltd.,Hangzhou 312300,Zhejiang,China)

机构地区：[1]浙江理工大学材料科学与工程学院,浙江杭州310018 [2]浙江龙盛集团股份有限公司,浙江绍兴312300

出　　处：《精细化工》2021年第5期1023-1029,共7页Fine Chemicals

基　　金：国家自然科学基金(21908201);中国博士后科学基金(2020M671793);浙江理工大学基本科研业务费专项资金资助(2020Q007)。

摘　　要：采用还原性有机酸络合铁离子并负载到活性炭纤维(ACFs)上,制备出非均相Fenton催化剂用于去除染料废水中有机污染物。采用SEM、FTIR和ICP-AES对制备出的草酸铁(Oxa-Fe)络合物负载ACFs(Oxa-Fe/ACFs-3)进行了表征。发现草酸铁络合物均匀负载在ACFs上,其中铁的质量分数为0.96%。在Oxa-Fe/ACFs-3和H_(2)O_(2)添加量分别为10g/L和100mmol/L(以染料废水体积计),50℃条件下对20m L染料废水进行了降解,染料废水化学需氧量(COD)去除率在100 min内可达62.2%。此外,考察了该催化剂pH适用范围以及重复使用性能。结果表明,Oxa-Fe/ACFs-3促进了H_(2)O_(2)活化产生活性自由基·OH和·O_(2)^(-),实现了对染料废水中有机污染物的降解。对比了不同还原性有机酸络合铁负载ACFs处理染料废水的性能,发现有机酸还原性越强,越有利于染料废水COD去除率的提高。Heterogeneous Fenton catalysts were prepared for the removal of organic pollutants from dye wastewater by using reductive organic acids coupled with iron ions supported activated carbon fibers(ACFs). The prepared ferric oxalate complex supported ACFs(Oxa-Fe/ACFs-3) was characterized by SEM, FTIR and ICP-AES. It was proved that the ferric oxalate complex was uniformly loaded on the surface on ACFs, and the mass fraction of iron was 0.96%. When the addition amount of Oxa-Fe/ACFs-3 and H_(2)O_(2) were 10 g/L and 100 mmol/L based on the volume of dye wasteruater, respectively, and 20 m L dye wastewater was degraded at 50 ℃, the removal rate of chemical oxygen demand(COD) could reach 62.2% within 100 min. In addition, the suitable p H range and reusability of this catalyst were investigated. The results showed that Oxa-Fe/ACFs-3 promoted the activation of H_(2)O_(2) to generate active radicals ·OH and ·O_(2)^(–), which realized the degradation of organic pollutants in dye wastewater. The performances of different reducing organic acids complexed with ferric supported ACFs in the treatment of dye wastewater were compared. It was found that the enhancement of reducibility of organic acids was beneficial for the improvement of COD removal rate in dye wastewater.

关 键 词：还原性有机酸 活性炭纤维 非均相FENTON 水处理技术 

分 类 号：X703[环境科学与工程—环境工程] TQ342+.74[化学工程—化纤工业]