Effect of Cu2+ on the Laccase-Inducted Formation of Non-Extractable Residues of Tetrabromobisphenol A in Humic Acids

被引:1
作者
Zhou, Yue [1 ]
Jiang, Bingqi [2 ]
Wang, Yongfeng [3 ]
Sun, Feifei [1 ]
Ji, Rong [1 ,3 ]
机构
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, 163 Xianlin Ave, Nanjing 210023, Peoples R China
[2] Fujian Prov Acad Environm Sci, 13 Huan Bei San Cun, Fuzhou 350013, Peoples R China
[3] Nanjing Univ, Quanzhou Inst Environm Protect Ind, Beifeng Rd, Quanzhou 362000, Peoples R China
基金
中国国家自然科学基金;
关键词
Non-extractable residues; Heavy metals; Organic pollutants; Humic supramolecules; ORGANIC-MATTER; BOUND RESIDUES; HEAVY-METALS; SOIL; TRANSFORMATION; SUBSTANCES; DECOLORIZATION; PURIFICATION; SORPTION; REMOVAL;
D O I
10.1007/s00128-022-03602-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We used (14) C-radiolabelling to study the non-extractable residues (NERs) formation of tetrabromobisphenol A (TBBPA) in a humic acid (HA) suspension under catalysis of laccase in the presence of copper. When entering the suspension after TBBPA adsorbing to HA supramolecular associates, Cu2+ at low concentrations (even without toxicity to laccase) significantly reduced the amount and first-order kinetic constant of the NER formation, while Cu2+ had no significant effect on the formation after it was complexed with HA. The inhibition effect of Cu2+ on the NER formation is explained to be attributed to the prevention of laccase-induced oxidation of TBBPA in the voids of HA associates by complexation of Cu2+ with periphery molecules of the associates. The results provide insights into varying effects of heavy metals on the environmental fate of organic contaminants and suggest that co-existing heavy metals could increase their environmental risk by reducing their NER formation.
引用
收藏
页码:1162 / 1166
页数:5
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