Synergistic degradation of Methylene Blue by novel Fe-Co bimetallic catalyst supported on waste silica in photo-Fenton-like system

IF 4.6 3区环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL Sustainable Environment Research Pub Date : 2021-11-03 DOI:10.21203/rs.3.rs-1016987/v1

K. G. Quiton, Ming-Chun Lu, Y. Huang

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引用次数: 3

Abstract

In this present study, a novel method to fabricate bimetallic Fe-Co catalyst supported on waste silica was investigated for the photo-Fenton-like (PFL) degradation of Methylene Blue (MB) dye. The uniqueness of this work is on the preparation of the catalyst via fluidized-bed crystallization (FBC) process. Under the optimum conditions of initial pH of 3.0, 3.0 mM of H 2 O 2 , and 1.0 g L -1 of FBC-derived Fe-Co/SiO 2 catalyst (fFCS), the maximum response for the decoloration and mineralization efficiencies of 20 mg L -1 of MB in 60 min were 100 and 65%, respectively. Compared to the impregnated Fe-Co/SiO 2 catalyst, the fFCS catalyst exhibited comparable decoloration and mineralization efficiencies, and relatively lower metal leaching for both iron and cobalt. Superoxide radical was unveiled to be the dominant reactive oxygen species in the PFL system over the fFCS catalyst. The catalysts were characterized by Fourier Transform Infrared spectroscopy, Energy Dispersive X-ray spectroscopy and Scanning Electron Microscopy. The results show the successful incorporation of iron and cobalt on the surface of the SiO 2 support material.

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新型二氧化硅负载铁钴双金属催化剂在光- fenton -like体系中协同降解亚甲基蓝

本文研究了一种新型二氧化硅负载双金属Fe-Co催化剂的制备方法，用于光fenton -like降解亚甲基蓝(MB)染料。这项工作的独特之处在于通过流化床结晶(FBC)工艺制备催化剂。在初始pH为3.0、h2o浓度为3.0 mM、fbc衍生Fe-Co/ sio2催化剂(fFCS)浓度为1.0 g L -1的条件下，MB浓度为20 mg L -1, 60 min的最大脱色率和矿化率分别为100%和65%。与Fe-Co/ sio2浸渍催化剂相比，fFCS催化剂的脱色和矿化效率相当，铁和钴的金属浸出率相对较低。在PFL体系中，超氧自由基是fFCS催化剂的主要活性氧。采用傅里叶红外光谱、x射线能谱和扫描电镜对催化剂进行了表征。结果表明，铁和钴在sio2支撑材料表面成功结合。

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来源期刊

Sustainable Environment Research Multiple-

CiteScore

8.00

自引率

2.00%

发文量

审稿时长

30 weeks

期刊介绍： The primary goal of Sustainable Environment Research (SER) is to publish high quality research articles associated with sustainable environmental science and technology and to contribute to improving environmental practice. The scope of SER includes issues of environmental science, technology, management and related fields, especially in response to sustainable water, energy and other natural resources. Potential topics include, but are not limited to: 1. Water and Wastewater • Biological processes • Physical and chemical processes • Watershed management • Advanced and innovative treatment 2. Soil and Groundwater Pollution • Contaminant fate and transport processes • Contaminant site investigation technology • Soil and groundwater remediation technology • Risk assessment in contaminant sites 3. Air Pollution and Climate Change • Ambient air quality management • Greenhouse gases control • Gaseous and particulate pollution control • Indoor air quality management and control 4. Waste Management • Waste reduction and minimization • Recourse recovery and conservation • Solid waste treatment technology and disposal 5. Energy and Resources • Sustainable energy • Local, regional and global sustainability • Environmental management system • Life-cycle assessment • Environmental policy instruments