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UV KrCl 准分子灯光芬顿-like 过程降解水溶液中的双酚 A

Degradation of Bisphenol A in an Aqueous Solution by a Photo-Fenton-Like Process Using a UV KrCl Excilamp.

机构信息

Baikal Institute of Nature Management of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia.

Institute of General and Experimental Biology of Siberian Branch of Russian Academy of Sciences, 6, Sakhyanovoy St., 670047 Ulan-Ude, Russia.

出版信息

Int J Environ Res Public Health. 2021 Jan 28;18(3):1152. doi: 10.3390/ijerph18031152.

DOI:10.3390/ijerph18031152
PMID:33525552
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7908459/
Abstract

Bisphenol A (BPA), a precursor to important plastics, is regarded as a common aquatic micropollutant with endocrine-disrupting activity. In the present study, we explored the capability of a UV KrCl excilamp (222 nm) to degrade BPA by a photo-Fenton-like process using persulfate under flow-through conditions. The first-order rate constants of degradation were obtained and the mineralization of dissolved organic carbon (DOC) was estimated. The results showed complete BPA degradation and high DOC mineralization (70-97%). A comparative analysis of degradation rates and DOC removal in the examined systems (UV, Fe/SO, UV/SO and UV/Fe/SO) revealed a significant synergistic effect in the photo-Fenton-like system (UV/Fe/SO) without the accumulation of toxic intermediates. This indicated that the BPA was oxidized via the conjugated radical chain mechanism, which was based on the photo-induced and catalytic processes involving HO and SO radicals. The primary intermediates of BPA degradation in the UV/Fe/SO system were identified by HPLC/MS and the oxidation pathway was proposed. The high performance of the photo-Fenton-like process employing a quasi-monochromatic UV radiation of a KrCl excilamp offers promising potential for an efficient removal of such micropollutants from aqueous media.

摘要

双酚 A（BPA）是一种重要塑料的前体，被认为是具有内分泌干扰活性的常见水生微量污染物。在本研究中，我们探索了使用流动条件下过硫酸盐的光芬顿类似过程，通过 UV KrCl 准分子灯（222nm）降解 BPA 的能力。获得了降解的一级速率常数，并估计了溶解有机碳（DOC）的矿化。结果表明 BPA 完全降解和高 DOC 矿化（70-97%）。在考察的系统（UV、Fe/SO、UV/SO 和 UV/Fe/SO）中降解速率和 DOC 去除的比较分析表明，光芬顿类似系统（UV/Fe/SO）中存在显著的协同效应，没有有毒中间产物的积累。这表明 BPA 是通过共轭自由基链机制氧化的，该机制基于涉及 HO 和 SO 自由基的光诱导和催化过程。通过 HPLC/MS 鉴定了 UV/Fe/SO 系统中 BPA 降解的主要中间产物，并提出了氧化途径。使用 KrCl 准分子灯的准单色 UV 辐射的光芬顿类似过程的高性能为从水介质中有效去除此类微量污染物提供了有前途的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/c517e604f6a0/ijerph-18-01152-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/60d254640d40/ijerph-18-01152-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/788f74a75ae2/ijerph-18-01152-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/c010fc2c912f/ijerph-18-01152-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/02c315d51d1e/ijerph-18-01152-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/84479877e612/ijerph-18-01152-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/c517e604f6a0/ijerph-18-01152-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/60d254640d40/ijerph-18-01152-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/788f74a75ae2/ijerph-18-01152-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/c010fc2c912f/ijerph-18-01152-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/02c315d51d1e/ijerph-18-01152-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/84479877e612/ijerph-18-01152-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf46/7908459/c517e604f6a0/ijerph-18-01152-g006.jpg

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