典型文献
Unravelling the effects of complexation of transition metal ions on the hydroxylation of catechol over the whole pH region
文献摘要：
Catechol pollutants(CATPs)serving as chelating agents could coordinate with many metal ions to form various CATPs-metal complexes.Little information is available on the effects of complexation of metal ions on CATPs degradation.This work presents a systematical study of·OH-mediated degradation of catechol and catechol-metal complexes over the whole pH range in advanced oxidation processes(AOPs).Results show that the pH-dependent com-plexation of metal ions(Zn2+,Cu2+,Ti4+and Fe3+)promotes the deprotonation of catechol under neutral and even acidic conditions.The radical adduct formation(RAF)reactions are both thermodynamically and kinetically favorable for all dissociation and complexa-tion species,and-OH/-O-group-containing C positions are more vulnerable to·OH attack.The kinetic results show that the complexation of the four metal ions offers a wide pH range of effectiveness for catechol degradation.At pH 7,the apparent rate constant(kapp)values for different systems follow the order of catechol+Ti4+≈catechol+Zn2+＞catechol+Cu2+＞catechol+Fe3+＞catechol.The mechanistic and kinetic results would greatly improve our understanding of the degradation of CATPs-metal and other organics-metal complexes in AOPs.The toxicity assessment indicates that the·OH-based AOPs have the ability for de-creasing the toxicity and increasing the biodegradability during the processes of catechol degradation.
文献关键词：
中图分类号：
作者姓名：
Zexiu An;Jianfei Sun;Qiong Mei;Bo Wei;Mingxue Li;Ju Xie;Maoxia He;Qiao Wang
作者机构：
Environment Research Institute,Shandong University,Qingdao 266237,China;School of Environmental and Materials Engineering,Yantai University,Yantai 264005,China;College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China
文献出处：
引用格式：
[1]Zexiu An;Jianfei Sun;Qiong Mei;Bo Wei;Mingxue Li;Ju Xie;Maoxia He;Qiao Wang-.Unravelling the effects of complexation of transition metal ions on the hydroxylation of catechol over the whole pH region)[J].环境科学学报（英文版）,2022(05):392-402
A类：
CATPs,plexation,Ti4+and,complexa,kapp,catechol+Ti4+,catechol+Zn2+,catechol+Cu2+,catechol+Fe3+
B类：
Unravelling,effects,complexation,transition,metal,hydroxylation,over,whole,region,Catechol,pollutants,serving,chelating,agents,could,coordinate,many,various,complexes,Little,information,available,degradation,This,work,presents,systematical,study,mediated,range,advanced,oxidation,processes,AOPs,Results,show,that,dependent,promotes,deprotonation,neutral,even,acidic,conditions,radical,adduct,RAF,reactions,both,thermodynamically,kinetically,favorable,dissociation,species,group,containing,positions,more,vulnerable,attack,results,four,offers,wide,effectiveness,At,apparent,rate,constant,values,different,systems,follow,order,mechanistic,would,greatly,improve,understanding,other,organics,toxicity,assessment,indicates,have,increasing,biodegradability,during
AB值：
0.443238
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