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Effects of polymer aging on sorption of 2,2',4,4'-tetrabromodiphenyl ether by polystyrene microplastics.
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-09 , DOI: 10.1016/j.chemosphere.2020.126706 Juan Wu 1 , Pengcheng Xu 1 , Qinghua Chen 1 , Dong Ma 1 , Wei Ge 2 , Tao Jiang 3 , Chao Chai 1
Chemosphere ( IF 8.1 ) Pub Date : 2020-04-09 , DOI: 10.1016/j.chemosphere.2020.126706 Juan Wu 1 , Pengcheng Xu 1 , Qinghua Chen 1 , Dong Ma 1 , Wei Ge 2 , Tao Jiang 3 , Chao Chai 1
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The sorption behavior of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) on aged polystyrene (PS) microplastics via seawater soaking, ultraviolet (UV) irradiation, seawater soaking and UV irradiation together was investigated. The effects of environmental factors including salinity, pH, and dissolved organic matter (DOM) on sorption of BDE-47 by the aged PS microplastics were analyzed. The equilibrium sorption capacity of BDE-47 by virgin PS, aged PS with seawater soaking, aged PS with UV irradiation and aged PS with seawater soaking and UV irradiation was 6.16, 4.96, 3.53, and 3.75 ng/g, respectively. The decrease in sorption capacity was related to the increase of surface crystallinity and the appearance of surface oxygen-containing functional groups. The kinetic and isotherm models suggested that aging did not change the sorption mechanism of BDE-47 on PS microplastics. pH had negligible impacts on BDE-47 sorption by virgin and aged PS. Sorption capacity of BDE-47 on aged PS in water with high salinity was lower than that on virgin PS, and DOM has less effect on the sorption of BDE-47 on aged PS.
中文翻译：
聚合物老化对聚苯乙烯微塑料吸附2,2'，4,4'-四溴二苯醚的影响。
研究了2,2'，4,4'-四溴二苯醚（BDE-47）通过海水浸泡，紫外线（UV），海水浸泡和UV辐射在老化的聚苯乙烯（PS）微塑料上的吸附行为。分析了盐度，pH和溶解性有机物（DOM）等环境因素对老化的PS微塑料吸附BDE-47的影响。原始PS，经过海水浸泡的老化PS，经过紫外线辐射的老化PS和经过海水浸泡和UV辐射的老化PS的BDE-47的平衡吸附容量分别为6.16、4.96、3.53和3.75 ng / g。吸附能力的下降与表面结晶度的增加和表面含氧官能团的出现有关。动力学和等温线模型表明，老化并没有改变BDE-47在PS微塑料上的吸附机理。pH值对未使用和老化的PS对BDE-47吸附的影响可忽略不计。在高盐度水中，BDE-47对老化PS的吸附能力低于原始PS，而DOM对BDE-47在老化PS上的吸附影响较小。
更新日期：2020-04-09
中文翻译：
聚合物老化对聚苯乙烯微塑料吸附2,2'，4,4'-四溴二苯醚的影响。
研究了2,2'，4,4'-四溴二苯醚（BDE-47）通过海水浸泡，紫外线（UV），海水浸泡和UV辐射在老化的聚苯乙烯（PS）微塑料上的吸附行为。分析了盐度，pH和溶解性有机物（DOM）等环境因素对老化的PS微塑料吸附BDE-47的影响。原始PS，经过海水浸泡的老化PS，经过紫外线辐射的老化PS和经过海水浸泡和UV辐射的老化PS的BDE-47的平衡吸附容量分别为6.16、4.96、3.53和3.75 ng / g。吸附能力的下降与表面结晶度的增加和表面含氧官能团的出现有关。动力学和等温线模型表明，老化并没有改变BDE-47在PS微塑料上的吸附机理。pH值对未使用和老化的PS对BDE-47吸附的影响可忽略不计。在高盐度水中，BDE-47对老化PS的吸附能力低于原始PS，而DOM对BDE-47在老化PS上的吸附影响较小。
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