Article
Engineering, Environmental
Xuguang Li, Yanxiu Guo, Liangguo Yan, Tao Yan, Wen Song, Rui Feng, Yuwei Zhao
Summary: Ball milling of MoS2 optimizes its surface properties, increasing surface area and S-vacancies to expose more Mo (IV) sites, resulting in enhanced catalytic efficiency for PMS activation. The process also improves adsorption capacity and accelerates the generation of reactive species, leading to more efficient degradation of contaminants like TC in advanced oxidation processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Wei Zhang, Liangguo Yan, Qiaodi Wang, Xuguang Li, Yanxiu Guo, Wen Song, Yanfei Li
Summary: In this study, the ball milling method was used to treat biochar, which enhanced its catalytic performance for tetracycline removal by generating oxygen-functional groups and defects on the surface. Experimental conditions and coexisting substances influenced the degradation efficiency of tetracycline by biochar. The radicals attached to the biochar played a significant role in tetracycline degradation, with both free radicals and non-free radicals participating in the process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Carlos Leiva, Fatima Arroyo-Torralvo, Yolanda Luna-Galiano, Rosario Villegas, Luis Francisco Vilches, Constantino Fernandez Pereira
Summary: This study analyzed the recovery of valuable metals from Bayer red mud using hydrometallurgical techniques, and the subsequent use of the solid as the main component of fired bricks. Optimal conditions for metal recovery were identified, and the compressive strength and environmental safety of the bricks were studied.
Article
Engineering, Chemical
Jiaqi Bu, Qingqing Wan, Zhiwei Deng, Hui Liu, Tianhao Li, Chengyun Zhou, Shian Zhong
Summary: In this study, a new catalyst (MdCu-Ni) was prepared by codoping rural mud and bimetallic oxides and used for electrocatalytic oxidation and PMS advanced oxidation to degrade pollutants. The results showed high removal efficiency and mineralization rate within 90 minutes, and the catalyst demonstrated good stability and high degradation efficiency for other organic pollutants. LC-MS analysis revealed the presence of 16 intermediates during the degradation process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Shrey Agrawal, Nikhil Dhawan
Summary: Red mud, an under-utilized byproduct of the aluminium industry, was subjected to mechanical and thermal activation to enhance acid leaching efficiency. The study found that different treatment methods resulted in varying dissolution rates of aluminium, silicon, and iron in the residue.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Engineering, Environmental
Min Huang, Xiaolei Wang, Cun Liu, Guodong Fang, Juan Gao, Yujun Wang, Dongmei Zhou
Summary: Novel sulfur-doped activated carbon particles were prepared through a simple method and utilized as activators of PMS to efficiently degrade various organic pollutants, with the degradation efficiency being dependent on the S doping content. The study showed that the presence of C-S-C bonds significantly influenced the degradation rate of pollutants like DEP, suggesting their importance in PMS activation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Denis Leybo, Anton S. Konopatsky, Xiaosheng Fang, Dmitry Shtansky
Summary: Due to their high toxicity, even a small amount of phenols entering the surrounding aquatic environment poses a serious danger to all living beings. To address this important problem, commercial micron-sized h-BN powder was ball milled and surface-functionalized, and characterized as a promising photocatalyst.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Su Yang, Baiyan Sui, Xin Liu, Jiao Sun, Jun Wang
Summary: The study developed a novel bleaching system based on PMS/polyphosphates, which has suitable penetration depth and excellent oxidative performance, effectively whitening teeth while minimizing damage to the pulp.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Li Ren, Yuanhong Zhong, Jingyi Xu, Jinxu Chen, Ting Zou, Xiao-Liang Liao, Zhi-Feng Chen, Lin Yu
Summary: In this study, Fe3-xCuxO4 nanoparticles were used as a heterogeneous catalyst to activate peroxymonosulfate (PMS) for degrading Climbazole (CBZ) in wastewater. The incorporation of copper in magnetite enhanced the catalyst's surface area and reducible ions, leading to improved catalytic efficiency. The optimized Fe(2.3)1Cu(0.69)O(4) exhibited the highest degradation efficiency and stability across a wide pH range. Sulfate radicals were identified as the main active species during the CBZ degradation process. The degradation products of CBZ were found to have lower toxicities.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Emmanuel De Gregorio, Alessio Occhicone, Fabio Montagnaro, Giuseppina Roviello, Laura Ricciotti, Claudio Ferone
Summary: Red Mud, a waste product of the Bayer Process, is costly to dispose of and accounts for 5% of the total costs of aluminum production. However, it contains high-value elements such as rare earths and metals. This study focuses on the recovery of iron in the form of Fe(II) oxalate. Hydrochloric acid showed the highest extraction capacity, while sulfuric and phosphoric acid inhibited extraction. Oxalic acid formed a stable complex and allowed for the recovery of iron oxalate. A CHEMCAD plant achieved a yield of over 16% per pass with a purity of up to 96%wt. The proposed process can be used in conjunction with other methods for recovering valuable substances from red mud.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Review
Environmental Sciences
Basudev Swain, Ata Akcil, Jae-chun Lee
Summary: Significantly unexploited red mud contains valuable rare earth metals and other metals that can be recovered through an industrial-scale valorization process. The global red mud inventory could reach 4 billion tons by 2020, with a potential value of approximately $4.3 trillion in rare earth metals. This article discusses the challenges and opportunities of valorizing red mud and proposes a feasible sequential metal recovery process.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Rishikesh Bajagain, Seung-Woo Jeong
Summary: This study demonstrates that nZVI can effectively activate PMS to generate ROS for efficient degradation of diesel-contaminated soil. The optimal concentrations of PMS and nZVI were found to be 3% and 0.2%, achieving a degradation efficiency of up to 61.2% in 2 hours.
Article
Engineering, Chemical
Lisha Jiang, Jianxin Song, Yi Hu, Mengnan Yuan, Xuemin Wang, Kai Wang, Wei Liu
Summary: A feasible high-energy ball-milling strategy was used to prepare Fe-doped bismuth oxysulfide (Bi2O2S) that showed durable activation of peroxymonosulfate (PMS) to degrade tetracycline (TC) under light irradiation at a wide range of pH. The synergy between Fe doping and Fe-O bond increased active sites for charge separation and PMS activation, facilitating the redox regeneration of Fe3+ to Fe2+. The optimized Fe-doped BiOS catalyst with 3.3%Fe/BiOS achieved efficient removal of tetracycline within 30 minutes. Nonradical (1O2) and accessible radical (O2.-, SO4.�, .OH) pathways were proposed as responsible for PMS-activated TC degradation under light irradiation. This work provides a reproducible method for scalable production of high-efficiency photocatalysts through high-energy ball-milling, and extends the application of the PMS activation system in practical environmental remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Andrei Shoppert, Dmitry Valeev, Mamodou Malal Diallo, Irina Loginova, Marie Constance Beavogui, Abdukhakim Rakhmonov, Yevgeniy Ovchenkov, Denis Pankratov
Summary: This study investigates the hydrochemical conversion of goethite to magnetite in high-iron bauxite residue. The results demonstrate the possibility of obtaining pure magnetite and achieving high extraction ratio of aluminum under specific conditions.
Article
Chemistry, Physical
Qingsong Liu, Xiangci Xue, Zengqing Sun, Xiaoxian Huang, Min Gan, Zhiyun Ji, Xuling Chen, Xiaohui Fan
Summary: A valorization process was developed to convert phosphogypsum and red mud into a precursor for high-strength, alkali-activated materials using a sodium silicate solution containing seawater as the activator. Mineral reconstruction during calcination resulted in the formation of ye'elimite, anhydrite, and gehlenite, which contributed to the alkali-activation process and the formation of thenardite and C-A-S-H gel. The mechanical properties of the synthesized materials, ranging from 12.9 MPa to 40.6 MPa, were controlled by the activator modulus and liquid-to-solid ratio. This research contributes to the efficient valorization of phosphogypsum and red mud into cementitious construction materials.
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)