当前位置：
X-MOL 学术
›
Environ. Sci. Technol.
›
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.)
Highly Efficient Utilization of Nano-Fe(0) Embedded in Mesoporous Carbon for Activation of Peroxydisulfate
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2019-07-22 , DOI: 10.1021/acs.est.9b02170 Yunwen Wu 1 , Xiaotong Chen 1 , Yu Han 1 , Dongting Yue 1 , Xinde Cao 1, 2 , Yixin Zhao 1, 2 , Xufang Qian 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2019-07-22 , DOI: 10.1021/acs.est.9b02170 Yunwen Wu 1 , Xiaotong Chen 1 , Yu Han 1 , Dongting Yue 1 , Xinde Cao 1, 2 , Yixin Zhao 1, 2 , Xufang Qian 1
Affiliation
|
Nanoscale zerovalent iron (nZVI) particles have received much attention in environmental science and technology due to their unique electronic and chemical properties. However, the aggregation and oxidation of nZVI brings much difficulty in practical application of environmental remediation. In this study, we reported a composite nano-Fe(0)/mesoporous carbon by a chelation-assisted coassembly and carbothermal reduction strategy. Nano-Fe(0) particles with surface iron oxide (Fe2O3·FeO) were wrapped with graphitic layers which were uniformly dispersed in mesoporous carbon frameworks. The unique structure made the nano-Fe(0) particles stable in air for more than 20 days. It was used as a peroxydisulfate (PDS) activator for the oxidation treatment of 2,4,6-trichlorophenol (TCP). The TOF value of MCFe for TCP degradation is nearly 3 times higher than those of FeSO4 and Fe2O3·FeO and nearly 2 times than that of commercial nZVI. The reactive oxygen species (ROS) including •SO4–, HO•, and •O2–, 1O2 are efficiently generated by PDS activation with MCFe. The PDS activation process by nano-Fe(0) particles was intrinsically induced by the ferrous ions (Fe(II)) continuously generated at the solid/aqueous interface. Namely, the nano-Fe(0) particles were highly efficiently utilized in sulfate radical-based advanced oxidation processes (SR-AOP). The porous structure also assists the absorption and transfer of TCP during the degradation process.
中文翻译：
嵌入中孔碳中的纳米Fe（0）的高效利用来活化过氧二硫酸盐
纳米级零价铁（nZVI）颗粒由于其独特的电子和化学特性而在环境科学和技术中受到了广泛关注。然而，nZVI的聚集和氧化在环境修复的实际应用中带来了很多困难。在这项研究中，我们通过螯合辅助共组装和碳热还原策略报告了一种复合纳米Fe（0）/中孔碳。具有表面氧化铁（Fe 2 O 3的纳米Fe（0）颗粒（FeO）被石墨层包裹，这些石墨层均匀地分散在中孔碳骨架中。独特的结构使纳米Fe（0）粒子在空气中稳定超过20天。它用作过氧二硫酸盐（PDS）活化剂，用于氧化处理2,4,6-三氯苯酚（TCP）。TCP降解的MCFe的TOF值比FeSO 4和Fe 2 O 3 ·FeO的TOF值高将近3倍，比商品nZVI的TOF值高将近2倍。活性氧（ROS）包括•SO 4 –，HO•和•O 2 –，1 O 2通过使用MCFe激活PDS可以有效生成这些元素。纳米Fe（0）颗粒的PDS活化过程是由在固/水界面连续产生的亚铁离子（Fe（II））固有地诱导的。即，纳米Fe（0）颗粒在基于硫酸根的高级氧化工艺（SR-AOP）中得到了有效利用。多孔结构还有助于降解过程中TCP的吸收和转移。
更新日期：2019-07-22
中文翻译：
嵌入中孔碳中的纳米Fe（0）的高效利用来活化过氧二硫酸盐
纳米级零价铁（nZVI）颗粒由于其独特的电子和化学特性而在环境科学和技术中受到了广泛关注。然而，nZVI的聚集和氧化在环境修复的实际应用中带来了很多困难。在这项研究中，我们通过螯合辅助共组装和碳热还原策略报告了一种复合纳米Fe（0）/中孔碳。具有表面氧化铁（Fe 2 O 3的纳米Fe（0）颗粒（FeO）被石墨层包裹，这些石墨层均匀地分散在中孔碳骨架中。独特的结构使纳米Fe（0）粒子在空气中稳定超过20天。它用作过氧二硫酸盐（PDS）活化剂，用于氧化处理2,4,6-三氯苯酚（TCP）。TCP降解的MCFe的TOF值比FeSO 4和Fe 2 O 3 ·FeO的TOF值高将近3倍，比商品nZVI的TOF值高将近2倍。活性氧（ROS）包括•SO 4 –，HO•和•O 2 –，1 O 2通过使用MCFe激活PDS可以有效生成这些元素。纳米Fe（0）颗粒的PDS活化过程是由在固/水界面连续产生的亚铁离子（Fe（II））固有地诱导的。即，纳米Fe（0）颗粒在基于硫酸根的高级氧化工艺（SR-AOP）中得到了有效利用。多孔结构还有助于降解过程中TCP的吸收和转移。
京公网安备 11010802027423号