当前位置: X-MOL 学术J. Clean. Prod. › 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.)
Fabrication and environmental assessment of photo-assisted Fenton-like Fe/FBC catalyst utilizing mealworm frass waste
Journal of Cleaner Production ( IF 9.7 ) Pub Date : 2020-01-27 , DOI: 10.1016/j.jclepro.2020.120259
Lei He , Shan-Shan Yang , Shun-Wen Bai , Ji-Wei Pang , Guo-Shuai Liu , Guang-Li Cao , Lei Zhao , Xiao-Chi Feng , Nan-Qi Ren

The massive generation of dye wastewater and mealworm waste has shown potential dangers. In this study, an innovative method was developed to fabricate an efficient photo-assisted Fenton-like heterogeneous catalyst, namely, iron (Fe)-loaded mealworms (the larvae of Tenebrio molitor Linnaeus) frass-based biochar (Fe/FBC). The physico–chemical properties were characterized by X-ray powder diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Brunsuer-Emmett-Teller, Raman spectroscopy, inductively coupled plasma spectroscopy, and N2 sorption-desorption isotherms. The results revealed the successful loading of Fe(III) on Fe/FBC surface with a loaded content of 6.0 wt%, and increased graphitization degree with high surface area (90.65 m2 g−1) appeared in Fe/FBC. Excellent removal efficiency toward malachite green (MG) dye (67% TOC within 5 min) and good recycling performance of Fe/FBC were observed in photo-assisted heterogeneous Fenton-like system, indicating that the aid of light irradiation may accelerate the heterogeneous Fenton-like reaction and realize the synergistic effect of enhanced MG degradation. Three key possible MG degradation pathways, involving N-de-methylation, hydroxylation, and destruction of the conjugated chromophore, were proposed based on the results of ultra-performance liquid chromatography-tandem mass spectrometry. Life cycle assessment study was applied to evaluate the environmental impacts of the following two disposal strategies for frass wastes: Fe/FBC catalyst facilitation (scenario A) and composting treatment (scenario B) at midpoint level. Regarding ten impact categories, scenario A produced lower environmental footprint compared to scenario B, indicating that the facilitation of Fe/FBC is a financially and environmentally viable strategy for relieving the greenhouse effect, energy crisis, water toxicity, and eutrophication.



中文翻译:

利用粉虱残渣制备光助Fenton型Fe / FBC催化剂及其环境评价

大量产生的染料废水和粉虫废物显示出潜在的危险。在这项研究中,开发了一种创新的方法来制造高效的光助Fenton样多相催化剂,即负载铁(Fe)的粉虫(Tenebrio molitor Linnaeus的幼虫)基于弗拉斯的生物炭(Fe / FBC)。通过X射线粉末衍射,扫描电子显微镜,能量色散X射线光谱,X射线光电子光谱,傅里叶变换红外光谱,Brunsuer-Emmett-Teller,拉曼光谱,电感耦合等离子体光谱等方法表征其理化性质和N 2吸附-解吸等温线。结果显示,Fe(III)成功地以6.0 wt%的负载量负载在Fe / FBC表面,并且石墨化程度增加,具有高表面积(90.65 m 2  g -1)出现在Fe / FBC中。在光辅助异质Fenton样体系中观察到对孔雀绿(MG)染料的优异去除效率(5分钟内TOC为67%)和良好的Fe / FBC回收性能,表明借助光照射可以加速异质Fenton类反应并实现增强的MG降解的协同作用。基于超高效液相色谱-串联质谱法的结果,提出了三种可能的MG降解途径,包括N-去甲基化,羟基化和共轭生色团的破坏。生命周期评估研究用于评估以下两种处理废品的策略对环境的影响:中点水平的Fe / FBC催化剂促进(方案A)和堆肥处理(方案B)。

更新日期:2020-01-27
down
wechat
bug