PAHs removal by soil washing with thiacalix[4]arene tetrasulfonate

IF 14 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Science and Ecotechnology Pub Date : 2024-04-20 DOI:10.1016/j.ese.2024.100422
Le-Yao Xing , Guan-Han Meng , Ji-Xian Yang , Ming-Han Xu , Yi-Ming Xu , Hai-Xiao Xie , Ai-Jie Wang , Yi-Lu Sun
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Abstract

Remediating soil contaminated with polycyclic aromatic hydrocarbons (PAHs) presents a significant environmental challenge due to their toxic and carcinogenic properties. Traditional PAHs remediation methods—chemical, thermal, and bioremediation—along with conventional soil-washing agents like surfactants and cyclodextrins face challenges of cost, ecological harm, and inefficiency. Here we show an effective and environmentally friendly calixarene derivative for PAHs removal through soil washing. Thiacalix[4]arene tetrasulfonate (TCAS) has a unique molecular structure of a sulfonate group and a sulfur atom, which enhances its solubility and facilitates selective binding with PAHs. It forms host-guest complexes with PAHs through π-π stacking, OH-π interactions, hydrogen bonding, van der Waals forces, and electrostatic interactions. These interactions enable partial encapsulation of PAH molecules, aiding their desorption from the soil matrix. Our results show that a 0.7% solution of TCAS can extract approximately 50% of PAHs from contaminated soil while preserving soil nutrients and minimizing adverse environmental effects. This research unveils the pioneering application of TCAS in removing PAHs from contaminated soil, marking a transformative advancement in resource-efficient and sustainable soil remediation strategies.

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用硫杂六[4]炔四磺酸盐冲洗土壤去除多环芳烃
由于多环芳烃(PAHs)具有毒性和致癌性,如何修复受其污染的土壤是一项重大的环境挑战。传统的多环芳烃修复方法--化学修复、热修复和生物修复--以及传统的土壤清洗剂(如表面活性剂和环糊精)都面临着成本高、生态危害大和效率低的挑战。在这里,我们展示了一种通过土壤洗涤去除多环芳烃的有效且环保的钙烯烃衍生物。硫杂菖蒲[4]炔四磺酸盐(TCAS)具有独特的分子结构,由一个磺酸基团和一个硫原子组成,这增强了它的溶解性,有利于与多环芳烃的选择性结合。它通过 π-π 堆叠、OH-π 相互作用、氢键、范德华力和静电作用与 PAHs 形成主客复合物。这些相互作用使得多环芳烃分子被部分包裹,有助于它们从土壤基质中解吸出来。我们的研究结果表明,0.7% 的 TCAS 溶液可以从受污染的土壤中萃取约 50% 的多环芳烃,同时保留土壤养分,最大限度地减少对环境的不利影响。这项研究揭示了 TCAS 在去除受污染土壤中多环芳烃方面的开创性应用,标志着资源节约型和可持续土壤修复战略的变革性进步。
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来源期刊
CiteScore
20.40
自引率
6.30%
发文量
11
审稿时长
18 days
期刊介绍: Environmental Science & Ecotechnology (ESE) is an international, open-access journal publishing original research in environmental science, engineering, ecotechnology, and related fields. Authors publishing in ESE can immediately, permanently, and freely share their work. They have license options and retain copyright. Published by Elsevier, ESE is co-organized by the Chinese Society for Environmental Sciences, Harbin Institute of Technology, and the Chinese Research Academy of Environmental Sciences, under the supervision of the China Association for Science and Technology.
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