Effect of mixed metal oxide‐based catalysts for the removal of hydrophobic phthalates from water

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-09-02 DOI:10.1002/clen.202300253

Salman Farissi, Peringai Aswin, Anbazhagi Muthukumar, Ayyamperumal Sakthivel, Muthukumar Muthuchamy

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Abstract

Contaminants of emerging concern (CECs) such as phthalic acid esters (PAEs) are ubiquitous, toxic and persistent in aquatic environments. Current study explored mixed metal oxide catalysts derived from magnesium aluminium (MAH), magnesium aluminium ruthenium (MAR‐H), magnesium aluminium nickel (MANH) hydroxides and copper aluminium hydroxides of ammonium (CAM‐Am) and sodium molybdate (CAM‐Na) to remove dibutyl phthalate (DBP) and di‐2‐ethyl hexyl phthalate (DEHP) from water. Powder X‐ray diffraction (XRD) studies of the catalysts before and after the treatment showed that their structures were stable and robust. During Fourier Transform Infrared (FTIR) studies, vibrational bands or peaks of ester and alkane functional groups of DBP and DEHP were observed at all the catalysts after treatment. Thermogravimetric analysis (TGA) confirmed phthalate adsorption at the five catalysts. Hydrolysis of DBP and DEHP was observed during treatment using CAM‐Am and CAM‐Na that was analysed and quantified using total organic carbon (TOC), high performance liquid chromatography (HPLC) and high‐resolution mass spectrometry (HRMS). From TOC analyses, optimal conditions of 500 mg L−1 catalyst dosage and 30 h treatment time were deduced for catalytic hydrolysis of DBP and DEHP. Present study illustrated that the catalysts MAH and MANH can adsorb PAEs while CAM‐Na can adsorb and hydrolyse them.

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基于混合金属氧化物的催化剂对去除水中疏水性邻苯二甲酸盐的影响

邻苯二甲酸酯 (PAE) 等新关注污染物 (CEC) 在水生环境中无处不在，具有毒性和持久性。目前的研究探索了由镁铝（MAH）、镁铝钌（MAR-H）、镁铝镍（MANH）氢氧化物以及铵（CAM-Am）和钼酸钠（CAM-Na）铜铝氢氧化物衍生的混合金属氧化物催化剂，以去除水中的邻苯二甲酸二丁酯（DBP）和邻苯二甲酸二-2-乙基己酯（DEHP）。对处理前后的催化剂进行的粉末 X 射线衍射 (XRD) 研究表明，它们的结构稳定而坚固。在傅立叶变换红外（FTIR）研究中，所有催化剂在处理后都观察到了 DBP 和 DEHP 的酯和烷官能团的振动带或峰值。热重分析 (TGA) 证实了五种催化剂对邻苯二甲酸酯的吸附作用。在使用 CAM-Am 和 CAM-Na 处理过程中观察到了 DBP 和 DEHP 的水解，并使用总有机碳 (TOC)、高效液相色谱 (HPLC) 和高分辨率质谱 (HRMS) 对其进行了分析和量化。通过 TOC 分析，推导出了催化水解 DBP 和 DEHP 的最佳条件：500 毫克/升催化剂用量和 30 小时处理时间。本研究表明，催化剂 MAH 和 MANH 可吸附 PAEs，而 CAM-Na 可吸附并水解 PAEs。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.