两种磁性生物炭耦合Diaphorobacter sp.DFA4去除2,4-DFA和Cu^(2+)的特性  

Removal of 2,4-difluoroanilne and Cu^(2+) by Diaphorobacter sp.DFA4 assisted magnetic biochar

作　　者：高隆基 赵芝清[1] 马源 岳静 廖文杰 黄明慧 GAO Longji;ZHAO Zhiqing;MA Yuan;YUE Jing;LIAO Wenjie;HUANG Minghui(Department of Environmental Engineering,Quzhou University,Quzhou 324000,China;School of Basic Medical Sciences,Hangzhou Normal University,Hangzhou 310058,China)

机构地区：[1]衢州学院环境工程系,浙江衢州324000 [2]杭州师范大学基础医学院,浙江杭州310058

出　　处：《工业水处理》2024年第8期90-98,共9页Industrial Water Treatment

基　　金：国家自然科学基金项目(21607092);浙江省基础公益研究计划项目(LZY21E080001);国家级大学生科技创新活动计划项目(202211488006);省级大学生科技创新活动计划(2018R435002)。

摘　　要：以橘子皮为原料,氯化铁、镍锰铁氧体为磁性介质,制备了氯化铁和镍锰铁氧体改性生物炭(分别记为FBC和MBC),重点考察FBC和MBC介导Diaphorobacter sp.DFA4耦合体系去除2,4-二氟苯胺(2,4-DFA)和Cu^(2+)的特性。结果表明:在0.5~2.0 g/L FBC/MBC的介导作用下,Diaphorobacter sp.DFA4对2,4-DFA和Cu^(2+)的去除效果明显提升。当2,4-DFA初始质量浓度为100~900 mg/L时,相比纯菌Diaphorobacter sp.DFA4培养体系,FBC和MBC介导耦合体系对2,4-DFA的降解强化倍数分别为2.24~4.04倍和1.96~4.71倍,Cu^(2+)去除率则分别由59.70%~69.95%提升至88.57%~93.20%和82.12%~88.20%。当pH为6.0~8.0时,较纯菌Diaphorobacter sp.DFA4培养体系,MBC、FBC介导耦合体系对2,4-DFA的去除率分别提高了15.35%~36.32%和22.43%~37.42%,对Cu^(2+)的去除率则分别提高了37.63%~42.34%和43.61%~47.83%;当盐度由0提高至4%时,两个耦合体系对2,4-DFA的去除率基本保持在85%及以上,而纯菌Diaphorobacter sp.DFA4培养体系对2,4-DFA的去除率则由77.98%降至55.19%。机理分析发现,耦合体系可诱导分泌更多的腐殖酸,且在偏碱条件下,FBC更有利于促使腐殖酸的分泌。Ferric chloride and nickel-manganese ferrite magnetic mesoporous biochars(designated as FBC and MBC,respectively)were synthesized by utilizing orange peels as the biomass feedstock and ferric chloride and nickel-manganese ferrite as magnetic media simultaneously.Subsequently,the characteristics of the FBC-and MBC-mediated coupling system with Diaphorobacter sp.DFA4 for the simultaneous removal of 2,4-difluoroanine and Cu^(2+)in the aqueous phase were investigated.The results demonstrated that FBC and MBC at concentrations ranging from 0.5 g/L to 2.0 g/L significantly enhanced the ability of Diaphorobacter sp.DFA4 to remove 2,4-DFA and Cu^(2+).In the presence of FBC and MBC,the degradation efficiency of 2,4-DFA increased by 2.24-4.04 times or 1.96-4.71 times,respectively,compared to the pure Diaphoractor sp.DFA4 culture system,when the initial concen⁃tration of 2,4-DFA was 100 mg/L to 900 mg/L.The removal efficiency of Cu^(2+)also increased from 59.70%-69.95%to 88.57%-93.20%and 82.12%-88.20%,respectively.Moreover,at pH levels ranging from 6.0 to 8.0,compared to the pure Diaphoractor sp.DFA4 culture system,the removal efficiency of 2,4-DFA in the MBC-and FBC-mediated coupling systems increased by 15.35%-36.32%and 22.43%-37.42%,respectively.The removal rates of Cu^(2+)also increased by 37.63%-42.34%and 43.61%-47.83%,respectively.When the salinity increased from 0 to 4%,both coupling systems maintained removal rates of 2,4-DFA above 85%,while the pure Diaphorobacter sp.DFA4 cul⁃ture system exhibited a decrease from 77.98%to 55.19%.Mechanistic analysis revealed that the coupling systems induced the secretion of more humic acid,and under alkaline conditions,FBC was more conducive to promoting the secretion of humic acid from Diaphorobacter sp.DFA4.

关 键 词：Cu^(2+) 2 4-二氟苯胺 磁性生物炭 Diaphorobacter sp.DFA4 

分 类 号：X703.1[环境科学与工程—环境工程]