当前位置：
X-MOL 学术
›
New J. Chem.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Application and mechanism of ferrihydrite in the EDDS improved heterogeneous photo-Fenton system: the role of different reactive species under different conditions
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-04-06 , DOI: 10.1039/d0nj00628a Hongjie Xie 1, 2, 3, 4, 5 , Mengqi Luo 1, 2, 3, 4, 5 , Wenyu Huang 1, 2, 3, 4, 5 , Ying Huang 1, 2, 3, 4, 5 , Xiaoqing Feng 1, 2, 3, 4, 5 , Zisong Xu 1, 2, 3, 4, 5 , Wei Luo 5, 6, 7, 8 , Shuangfei Wang 3, 5, 9, 10, 11 , Hongfei Lin 5, 9, 10 , Gilles Mailhot 12, 13, 14, 15, 16
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-04-06 , DOI: 10.1039/d0nj00628a Hongjie Xie 1, 2, 3, 4, 5 , Mengqi Luo 1, 2, 3, 4, 5 , Wenyu Huang 1, 2, 3, 4, 5 , Ying Huang 1, 2, 3, 4, 5 , Xiaoqing Feng 1, 2, 3, 4, 5 , Zisong Xu 1, 2, 3, 4, 5 , Wei Luo 5, 6, 7, 8 , Shuangfei Wang 3, 5, 9, 10, 11 , Hongfei Lin 5, 9, 10 , Gilles Mailhot 12, 13, 14, 15, 16
Affiliation
|
The application of carboxylic acid and natural iron oxide in heterogeneous AOP systems for the treatment of organic pollutants in water has attracted extensive attention. In this work, ethylenediamine-N,N′-disuccinic acid (EDDS) was complexed with ferrihydrite to improve the photo-Fenton system for bisphenol A (BPA) degradation, and the mechanism of the system was investigated. TEM, XRD and BET were used to investigate the morphology, structure and specific surface area of ferrihydrite. The characterization results revealed that ferrihydrite was amorphous and agglomerated, its main composition was 2–2lfh, and its specific surface area was 297.5 m2 g−1. BPA degradation experiments, carried out at different influence factors including the initial concentration of EDDS, amount of ferrihydrite and initial concentration of H2O2, showed a maximum degradation rate of BPA of 85.1% under the optimal conditions (at 1.0 mmol L−1 EDDS, 0.6 g L−1 ferrihydrite and 0.5 mmol L−1 H2O2). Finally, in order to analyze the mechanism of BPA degradation, 2-propanol and chloroform were used as free radical scavengers to capture hydroxyl radicals (˙OH) and superoxide anion radicals (˙O2−) respectively. The results indicated that ˙OH radicals and 1O2 play an important role under aerobic conditions, while ˙O2− radicals produced by the reaction of H2O2 and holes are non-negligible under anaerobic conditions. Moreover, the iron dissolution also plays a promoting role in BPA degradation. Overall, Fe(III) and Fe(II) redox processes are accelerated due to the Fe(III)–EDDS complex reaction under irradiation and in the presence of ˙O2− radicals and trace iron dissolution, which increases the number of reactive species in the system. The BPA degradation is facilitated by various reactive species including ˙OH radicals, 1O2 and ˙O2− radicals.
中文翻译：
亚铁水合物在EDDS改进的非均质光芬顿体系中的应用及其机理：不同条件下不同反应物种的作用
羧酸和天然氧化铁在非均相AOP系统中用于处理水中有机污染物的应用引起了广泛关注。在这项工作中，将乙二胺-N，N'-二琥珀酸（EDDS）与亚铁酸盐复合以改善光-芬顿体系对双酚A（BPA）的降解，并研究了该机理。用TEM，XRD和BET研究了水铁矿的形貌，结构和比表面积。表征结果表明，水铁矿为无定形团聚体，主要成分为2〜2lfh，比表面积为297.5 m 2 g -1。在EDDS的初始浓度，三水铁矿的量和H 2 O 2的初始浓度等不同影响因素下进行的BPA降解实验表明，在最佳条件下（1.0 mmol L -1时），BPA的最大降解率为85.1％。EDDS，0.6 g L -1亚铁酸盐和0.5 mmol L -1 H 2 O 2）。最后，为了分析BPA退化的机制，2-丙醇和氯仿用作自由基清除剂，以（O捕获羟基自由基（OH）和超氧化物阴离子自由基2 - ）分别。结果表明˙OH自由基和1 O 2玩需氧条件下具有重要作用，而ö 2 -基团的H的反应产生2 ö 2和孔是在厌氧条件下不可忽略的。此外，铁的溶解在BPA降解中也起促进作用。总体而言，铁（III）和Fe（II）的氧化还原过程中，由于加速到的Fe（III）-EDDS下照射和在O3存在复杂反应2 -基团和痕量铁溶解，这增加了反应性物质的数量在系统中。包括˙OH自由基，1 O 2和variousO在内的各种反应性物质可促进BPA降解2 -自由基。
更新日期：2020-04-06
中文翻译：
亚铁水合物在EDDS改进的非均质光芬顿体系中的应用及其机理：不同条件下不同反应物种的作用
羧酸和天然氧化铁在非均相AOP系统中用于处理水中有机污染物的应用引起了广泛关注。在这项工作中，将乙二胺-N，N'-二琥珀酸（EDDS）与亚铁酸盐复合以改善光-芬顿体系对双酚A（BPA）的降解，并研究了该机理。用TEM，XRD和BET研究了水铁矿的形貌，结构和比表面积。表征结果表明，水铁矿为无定形团聚体，主要成分为2〜2lfh，比表面积为297.5 m 2 g -1。在EDDS的初始浓度，三水铁矿的量和H 2 O 2的初始浓度等不同影响因素下进行的BPA降解实验表明，在最佳条件下（1.0 mmol L -1时），BPA的最大降解率为85.1％。EDDS，0.6 g L -1亚铁酸盐和0.5 mmol L -1 H 2 O 2）。最后，为了分析BPA退化的机制，2-丙醇和氯仿用作自由基清除剂，以（O捕获羟基自由基（OH）和超氧化物阴离子自由基2 - ）分别。结果表明˙OH自由基和1 O 2玩需氧条件下具有重要作用，而ö 2 -基团的H的反应产生2 ö 2和孔是在厌氧条件下不可忽略的。此外，铁的溶解在BPA降解中也起促进作用。总体而言，铁（III）和Fe（II）的氧化还原过程中，由于加速到的Fe（III）-EDDS下照射和在O3存在复杂反应2 -基团和痕量铁溶解，这增加了反应性物质的数量在系统中。包括˙OH自由基，1 O 2和variousO在内的各种反应性物质可促进BPA降解2 -自由基。
京公网安备 11010802027423号