环境工程学报2024，Vol.18Issue(4)：1032-1043,12.DOI:10.12030/j.cjee.202310086
KMnO4缓释氧化剂降解地下水中的苯酚和苯胺
Degradation of phenol and aniline in groundwater by KMnO4 slow-release oxidant
摘要
Abstract
In order to achieve the purpose of controlled release,effective transport and efficient remediation of the oxidant,the slow-release technology is used to realize the long-term and efficient remediation of the groundwater aquifer by the oxidant.The potassium permanganate(KMnO4)slow-release materials with the addition of activated carbon were experimentally prepared by melt molding method,and the optimal ratios and sizes of slow-release materials were determined by release kinetics.In addition,the phenol-aniline degradation kinetics by KMnO4 slow-release materials and the effect of groundwater quality on phenol-aniline degradation were also investigated.Finally,an experiment was conducted on the degradation of phenol and aniline using slow-release materials in a two-dimensional sand tank.The results showed that the slow-release effect of KMnO4 slow-release material with a mass ratio of 3∶3∶2∶1 for paraffin,potassium permanganate,activated carbon,and silica sand,which was a 1 cm cube,was the best.The release kinetics study showed that the release rate of the sustained-release material after 30 d was 64.17％,indicating that it had excellent sustained-release properties,and the first-order kinetics equation was used to fit the experimental data with good correlation.And there were numerous holes and gaps appeared on the surface of KMnO4 retarded material after retardation,and the content of Mn,O,Si,and K elements on the surface increased significantly.This indicating that the release principle of KMnO4 slow-release material in water was mainly dissolution diffusion.Under the action of the slow-release oxidant,the concentration changes of phenol and aniline in the two-dimensional sand tank form a conical repair area centered on the slow-release material,and the concentration of phenol and aniline in the longitudinal direction decreased rapidly.This experimental result provides theoretical support for the remediation of actual groundwater aquifer pollution.关键词
KMnO4缓释氧化剂/苯酚/苯胺/降解Key words
KMnO4 slow-release oxidant/phenol/aniline/degradation分类
资源环境引用本文复制引用
张渺,乔微涵,胡志欣,董鲁钰,夏玉瑾,王雪丽,杨胜科..KMnO4缓释氧化剂降解地下水中的苯酚和苯胺[J].环境工程学报,2024,18(4):1032-1043,12.基金项目
国家重点研发计划资助项目(2020YFC1808300) （2020YFC1808300）
陕西省自然科学基金资助项目(2022JQ-081) （2022JQ-081）
