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首页> 外文期刊>Environmental Science and Pollution Research >Photodegradation of hexabromocyclododecane (HBCD) by Fe(III) complexes/H_2O_2 under simulated sunlight
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Photodegradation of hexabromocyclododecane (HBCD) by Fe(III) complexes/H_2O_2 under simulated sunlight

机译：Fe（III）配合物/ H_2O_2在模拟阳光下对六溴环十二烷（HBCD）的光降解

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摘要

Hexabromocyclododecane (HBCD) is a globally produced brominated flame retardant used primarily as an additive flame retardant in polystyrene and textile products. Photodegradation of HBCD in the presence of Fe(III)-carbox-ylate complexes/H_2O_2 was investigated under simulated sunlight. The degradation of HBCD decreased with increasing pH in the Fe(III)-oxalate solutions. In contrast, the optimum pH was 5.0 for the Fe(III)-citrate-catalyzed photodegradation within the range of 3.0 to 7.0. For both Fe(III)-oxalate and Fe(III)-citrate complexes, the increase of carboxylate concentrations facilitated the photodegradation. The photochemical removal of HBCD was related to the photoreactivity and speciation distribution of Fe(ffl) complexes. The addition of H_2O_2 markedly accelerated the degradation of HBCD in the presence of Fe(III)-citrate complexes. The quenching experiments showed that -OH was responsible for the photodegradation of HBCD in the Fe(III)-carboxylate complexes/H_2O_2 solutions. The results suggest that Fe(III)complexes/H_2O_2 catalysis is a potential method for the removal of HBCD in the aqueous solutions.
机译：六溴环十二烷（HBCD）是全球生产的溴化阻燃剂，主要用作聚苯乙烯和纺织品中的添加剂阻燃剂。在模拟阳光下研究了在Fe（III）-羧酸盐-络合物/ H_2O_2存在下六溴环十二烷的光降解。在草酸铁（III）溶液中，六溴环十二烷的降解随pH值的增加而降低。相反，柠檬酸铁（III）催化的光降解的最佳p​​H为5.0，在3.0至7.0的范围内。对于草酸Fe（III）和柠檬酸Fe（III）配合物而言，羧酸盐浓度的增加促进了光降解。六溴环十二烷的光化学去除与Fe（ffl）配合物的光反应性和形态分布有关。在柠檬酸铁（Ⅲ）配合物存在下，加入H_2O_2可显着加速六溴环十二烷的降解。淬灭实验表明，-OH引起Fe（III）-羧酸盐配合物/ H_2O_2溶液中六溴环十二烷的光降解。结果表明，Fe（III）络合物/ H_2O_2催化是去除水溶液中六溴环十二烷的潜在方法。

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