Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China.
Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning 110016, China.
Sci Total Environ. 2021 Jan 20;753:141809. doi: 10.1016/j.scitotenv.2020.141809. Epub 2020 Aug 20.
In recent years, the safety and ecology threat of cyanobacterial burst has drawn wide concern, especially the release of toxic microcystin-LR (MC-LR). To break through the bottleneck of uncomplete MC-LR degradation by conventional physical-chemistry methods, Fenton-based advanced oxidation processes (AOPs) developed rapidly due to striking degradation efficiency through the potent hydroxyl radicals (HO·) oxidation. Herein, a comprehensive overview is presented on the recent achievements of the various Fenton-based technologies (including conventional Fenton, photo-Fenton, electro-Fenton, ozone-Fenton and sono-Fenton) for MC-LR degradation. In particular, the comparisons between various Fenton-based technologies about advantages and drawbacks are discussed. Based on analyzing the degradation intermediates and pathways, the destruction of Adda chain via hydroxylation was confirmed to be essential for detoxification of MC-LR. Roles of influencing factors such as MC-LR initial concentration, dosages of the catalyst and oxidant, environment alkalinity, natural organic matters (NOMs) as well as other inorganic ions are specifically summarized. This Review also gave special emphasis on technique optimization trends for Fenton application of MC-LR degradation, as well as key challenges and future opportunities in this fast developing field.
近年来，蓝藻水华爆发带来的安全和生态威胁引起了广泛关注，尤其是微囊藻毒素-LR（MC-LR）的释放。为了突破传统物理化学方法不完全降解 MC-LR 的瓶颈，基于芬顿的高级氧化工艺（AOPs）由于强羟基自由基（HO·）氧化而具有显著的降解效率，因此迅速发展起来。本文对各种基于芬顿的技术（包括传统芬顿、光芬顿、电芬顿、臭氧化芬顿和声芬顿）在 MC-LR 降解方面的最新成果进行了全面综述。特别是讨论了各种基于芬顿的技术的优缺点比较。通过分析降解中间体和途径，确认了 Adda 链的羟化破坏对于 MC-LR 的解毒至关重要。还特别总结了 MC-LR 初始浓度、催化剂和氧化剂用量、环境碱度、天然有机物（NOMs）以及其他无机离子等影响因素的作用。本文还特别强调了 MC-LR 降解中芬顿应用的技术优化趋势，以及该快速发展领域的关键挑战和未来机遇。
