数字农科院2.0

Mitigation of di-(2-ethylhexyl) phthalate contamination exposure over supramolecular organic heterojunction

文献类型： 外文期刊

作者： Hailian Wei;Ling Cheng;Xianglong Yang;Qi Zhang;Jin Mao;Peiwu Li

作者机构：

关键词： DEHP;Perylene diimide;Photocatalytic degradation;Selective adsorption;Supramolecular organic heterojunction

期刊名称： Journal of Environmental Chemical Engineering

ISSN： 2213-3437

年卷期： 2024 年 12 卷 6 期

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Di-(2-ethylhexyl) phthalate (DEHP) with endocrine disrupting toxicity has been widely concerned owing to its widespread presence in environment and food. As an essential part of the daily diet, edible oil has become an emerging and nonnegligible source of DEHP intake exposure. Herein, we demonstrated a two-step method to mitigate DEHP exposure from edible oil including firstly selective adsorption and then photocatalytic degradation by supramolecular organic nanomaterial composites. Perylene diimide (PDI) heterojunction with Bi2WO6 was synthesized by a facile ultrasonic-water bath heating method. It was found that PDI/Bi2WO6 showed selective adsorption of DEHP in edible oil via π-π stacking, hydrophobic interactions, and monolayer chemisorption compared with other phthalates. Adsorption kinetics and isotherm simulation results showed that the adsorption process conformed to the second-order kinetics and Langmuir model. Then, under visible light irradiation, PDI/Bi2WO6 with 35 % m(PDI)/m(Bi2WO6) had the highest degradation rate of DEHP, which was 2.16 and 1.76 times higher than that of PDI and Bi2WO6, respectively. The reactive species generated under visible light irradiation, superoxide radicals (•O2−), hydroxyl radicals (•OH), and holes (h+) were synergistically involved in the photodegradation of DEHP to the intermediates of mono(2-ethylhexyl) phthalate (MEHP), mono-dibutyl phthalate (MBP), phthalic acid (PA), and 4-oxohexanoic acid. These findings may provide a technology for minimizing and treating contaminants exposure in the environment and foodstuffs through supramolecular organic nanomaterial heterojunction.

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