Article
Mining & Mineral Processing
Gde Pandhe Wisnu Suyantara, Daniyarov Berdakh, Hajime Miki, Tsuyoshi Hirajima, Keiko Sasaki, Daishi Ochi, Yuji Aoki
Summary: This study investigated the effect of hydrogen peroxide treatment on the flotation behavior of chalcocite and enargite. The results showed that hydrogen peroxide treatment can reduce the floatability of chalcocite and enargite, and it can also selectively separate these two minerals.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Biomedical
Pingyun Yuan, Geng Dou, Tao Liu, Xiaoyan Guo, Yongkang Bai, Dake Chu, Shiyu Liu, Xin Chen, Yan Jin
Summary: A nano-modulator was developed to manipulate the hypoxia, glucose, radicals, and temperature in tumor tissue, achieving synergistic therapy with high efficiency and minimal side effects. The results showed excellent tumor inhibition and high survival rate of tumor-bearing mice, indicating the potential of this approach for tumor treatment.
Article
Geochemistry & Geophysics
Xiang Gong, Suqi Li, Jiaqiao Yuan, Zhan Ding, Anmei Yu, Shuming Wen, Shaojun Bai
Summary: Efficient treatment of mineral-processing wastewater is a subject of great interest in recent times. This study aimed to degrade xanthate from flotation tailings wastewater using a pyrite-catalyzed Fenton system. The method achieved a sodium butyl xanthate (SBX) removal rate of over 96%, outperforming the H2O2 system by 12.85% under optimal conditions. Natural pyrite acted as a catalyst to enhance the oxidation capacity of H2O2, with hydroxyl radicals (center dot OH) identified as the main active species. The reaction mechanism proposed involves the adsorption of H2O2 onto pyrite surfaces, reaction with Fe2+, formation of center dot OH and Fe3+, and oxidation of SBX to smaller products.
Article
Engineering, Chemical
Daniyarov Berdakh, Hajime Miki, Tsuyoshi Hirajima, Keiko Sasaki, Akbarshokh Ulmaszoda, Ryota Nakao, Daishi Ochi, Yuji Aoki, Gde Pandhe Wisnu Suyantara
Summary: This study evaluated the feasibility of separating molybdenite from chalcocite using oxidation treatment. The results showed that H2O2 oxidation treatment enables the selective flotation of molybdenite.
Article
Chemistry, Physical
Qiqi Sun, Zheren Chi, Xing Qin, Limei Qin, Yongsheng Li, Dechao Niu
Summary: This study proposes a stepwise-confined self-reduction strategy to construct a dynamic self-reduction dual-metal (Cu/Fe) nanocatalyst that can generate reactive oxygen species in an acidic and reductive tumor microenvironment. In vitro and animal experiments demonstrate that this synergistic catalyst can significantly inhibit tumor growth while ensuring the safety of treatment. This work provides a versatile pathway for the precise construction of bioapplicable multimetal-based nanocatalysts for efficient and safe diagnosis and treatment of tumors.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
A. El-bouazzaoui, Y. Ait-khouia, I. Demers, M. Benzaazoua
Summary: This paper investigates the flotation challenges of gersdorffite in environmental desulfurization and provides a better understanding of its surface chemistry and collector adsorption behavior. The results of this study are important for understanding the flotation behavior of gersdorffite.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Khouloud Talbi, Lamia Mammeri, Bouchra Lekikot, Mohamed El Hadi Benssassi, Tahar Sehili
Summary: This study explores the use of copper(II)-nitrilotriacetic acid (CuII-NTA) as a catalyst in the Fenton-like process for the degradation of sulfamethoxazole (SMX) using hydrogen peroxide (H2O2) under neutral pH conditions. The results show that the efficiency of the Cu-II-NTA/H2O2 process is limited by the slow CuII-NTA/CuI-NTA redox cycle, but can be improved by the addition of hydroxylamine (HA) to enhance the regeneration of CuI. The study also evaluates the effects of various factors on the degradation rates of SMX, such as initial concentrations, pH, Cu(II):NTA molar ratio, and temperature.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Pengxiang Qiu, Jiawei Zhu, Shuo Gao, Shuai Zhang, Jiayu Gu, Fengling Liu, Zhaobing Guo
Summary: In this study, modified amorphous boron with high electrochemical performance was fabricated through a simple high-temperature annealing process. The self-regulation of the crystal phases interface in the modified boron resulted in strong electronic interaction and improved electrochemical activity. The modified boron exhibited high H2O2 production rate and pollutant degradation efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Review
Engineering, Environmental
Yong Liu, Yang Zhao, Jianlong Wang
Summary: Fenton processes, utilizing the reaction between Fe2+ and H2O2 to produce hydroxyl radicals for the degradation of organic pollutants, are efficient but face challenges with traditional bulk feeding of H2O2. In-situ production of H2O2 through O-2 activation in Fenton/Fenton-like processes is gaining attention for its potential advantages in industrial wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Xingjie Wang, Miaoxin Chen, Liyuan Ma, Peng Liu, Jianwei Zhou, Devin J. Sapsford
Summary: This study investigated the degradation behavior of residual xanthate adsorbed on pyrite surface and found that pyrite was effective in treating residual xanthates in mineral processing wastewater. The removal rate constant increased with increasing pyrite loading, and acidic pH and high temperature favored xanthate degradation. Dissolved oxygen played a critical role in the degradation process. However, the reuse of pyrite was limited by the accumulation of oxidation products.
MINERALS ENGINEERING
(2023)
Review
Chemistry, Physical
Ling Xin, Jiwei Hu, Yiqiu Xiang, Caifang Li, Liya Fu, Qiuhua Li, Xionghui Wei
Summary: Advanced oxidation technology, such as fenton-like reagent oxidation and ozone oxidation, is crucial for degrading organic pollutants. Fenton-like reactions are characterized by their low cost, simplicity, thoroughness, and lack of secondary pollution. Materials like graphene, carbon nanotubes, and fullerenes play a significant role in enhancing the catalytic effect of fenton-like catalysts.
Article
Chemistry, Physical
Jiaxiang Liang, Yanping Hou, Jie Sun, Hongxiang Zhu, Han Pang, Jinhang Yang, Mi Wang, Jiangli Sun, Jianhua Xiong, Wenyu Huang, Zebin Yu, Shuangfei Wang
Summary: This work aims to explore the effect of optimal overpotential discrepancy between two-electron oxygen reduction reaction (OP2eORR) and metal reduction reaction (OPMRR) of the cathode on electro-Fenton (EF) system performance, and propose a strategy to eliminate overpotential discrepancy. The research demonstrates that cathodes with the same overpotential as the desired reaction exhibit superior EF performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Samira Sheikhi, Behjat Jebalbarezi, Reza Dehghanzadeh, Ammar Maryamabadi, Hassan Aslani
Summary: This research assessed the usage of Fe (VI)/PMS and Fe(VI)/H2O2 oxidation for removing sulfamethoxazole (SMX) from water. The study found that Fe(VI)/PMS system achieved complete removal of SMX at low concentration and appropriate pH. The degradation pathways and toxic effects of SMX transformation products were also identified.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Thays de Oliveira Guidolin, Kelvin Goularte dos Santos, Oscar Rubem Klegues Montedo, Fabiano Raupp Pereira, Sabrina Arcaro, Maria Alice P. Cechinel
Summary: This study investigated the use of pyritic waste as a catalyst for the discoloration of textile effluents. The particle size and pre-treatment of the catalyst were found to affect the efficiency of the discoloration process. The results showed that the catalyst concentration, H2O2 concentration, and reaction time were important factors in achieving optimal discoloration. The study also revealed the stability of the catalyst and its potential environmental benefits.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Zhong Chen, Ducheng Yao, Chengcheng Chu, Shun Mao
Summary: This article introduces strategies for improving the efficiency of photocatalytic H2O2 production and discusses its potential and challenges in environmental applications.
CHEMICAL ENGINEERING JOURNAL
(2023)