Journal ArticleDOI
Hierarchical porous biochar from shrimp shell for persulfate activation: A two-electron transfer path and key impact factors
Jiangfang Yu,Lin Tang,Ya Pang,Guangming Zeng,Haopeng Feng,Jiajing Zou,Jingjing Wang,Chengyang Feng,Xu Zhu,Xilian Ouyang,Jisui Tan +10 more
TLDR
In this article, hierarchical porous biochar from shrimp shell (PSS-bio) was prepared and applied for persulfate activation for 2,4-dichlorophenol removal.Abstract:
Herein, hierarchical porous biochar from shrimp shell (PSS-bio) was prepared and applied for persulfate activation for 2,4-dichlorophenol removal. The pyrolysis temperature was found to play an important role in carbon structure and property modulation, where PSS-bio obtained at 800 °C (PSS-800) exhibited the fastest adsorption capacity and the best catalytic activity with the degradation rates 29 times higher than that of PSS-bio obtained at 400 °C (PSS-400). Further analysis demonstrated that hierarchical pores and carbon configuration were two key impact factors of biochar in AOP. Interestingly, the original free-radical dominated pathway in PSS-400 also changed into a non-radical one (direct two-electron transfer path) in PSS-800, whose efficiency could be somewhat disturbed by pH values, humic acid and anions regardless of their concentrations as low as 5 mM or as high as 500 mM, demonstrating its application potential for the treatment of both highly saline water and organic-rich water.read more
Citations
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Nonradicals induced degradation of organic pollutants by peroxydisulfate (PDS) and peroxymonosulfate (PMS): Recent advances and perspective
TL;DR: In this review, nonradical pathways and reaction mechanisms for oxidation of various organic pollutants by PDS and peroxymonosulfate are overviewed and nonradical based persulfate activation mechanisms by metal oxides and carbon materials are updated.
Journal ArticleDOI
Activation of persulfates by carbonaceous materials: A review
TL;DR: In this paper, the synergistic effect for persulfate improvement in the composites or in the hybrid activation systems is explored, and the influence of the environmental conditions, such as pH, temperature, inorganic anions and dissolved organic matter, on the activation processes are discussed.
Journal ArticleDOI
High-efficiency degradation of organic pollutants with Fe, N co-doped biochar catalysts via persulfate activation.
TL;DR: The radical quenching studies, electron paramagnetic resonance (EPR) measurements, and electrochemical analyses verified that the mechanism of AO7 degradation in the Fe-N-BC/PS system included both radical and non-radical pathways involving the generation of OH, SO4-, O2-, 1O2, and electron transfer.
Journal ArticleDOI
Biomass-derived porous graphitic carbon materials for energy and environmental applications
Qiang Chen,Xiaofei Tan,Yunguo Liu,Shaobo Liu,Meifang Li,Yanling Gu,Peng Zhang,Shujing Ye,Zhongzhu Yang,Yuanyuan Yang +9 more
TL;DR: In this paper, a review of the principal synthesis methodologies of BPGC is presented, and three electrochemical energy storage and conversion systems that utilize BPGCs are intensively investigated, including supercapacitors (SCs), lithium-ion batteries (LIBs), and fuel cells (FCs).
Journal ArticleDOI
Preparation of biochar and biochar composites and their application in a Fenton-like process for wastewater decontamination: A review.
TL;DR: The preparation methods for biochar and biochar composites are reviewed to systematically analyze the influential factors on the preparation process and the mechanisms by which biochar removes different organic pollutants are comprehensively reviewed.
References
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Degradation efficiencies of azo dye Acid Orange 7 by the interaction of heat, UV and anions with common oxidants: Persulfate, peroxymonosulfate and hydrogen peroxide
TL;DR: It was found that PMS could be activated by some anions, but PS and H( 2)O(2) cannot, and the activation efficiencies of PMS are remarkable, whereas remarkable by HCO(3)(-), HPO(4)(2-), Cl(-) and CO(3)2-).
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