Article
Engineering, Environmental
Marckens Francoeur, Christelle Yacou, Eddy Petit, Dominique Granier, Sarra Gaspard, Stephan Brosillon, Andre Ayral
Summary: The study aimed to determine the optimal conditions for the preparation of magnetic activated carbons (mACs) from Sargassum sp. as adsorbents and catalytic supports. The mACs showed better adsorption capacity and degradation efficiency for antibiotics when prepared by the post-impregnation method compared to the pre-impregnation method. The physicochemical properties of the mACs were characterized using various techniques, and the use of Sargassum sp. was found to be promising for the removal of organic pollutants from polluted waters.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Huimei Shan, Huinan Mo, Yunquan Liu, Chunya Zeng, Sanxi Peng, Hongbin Zhan
Summary: Graphene oxide chitosan composite (GOCS) is an environmentally friendly composite adsorbent that can adsorb heavy metals, but its efficiency for heavy metal adsorption is often low. Fe-Mn binary oxides (FMBO) have a high removal capacity of As(III), but suffer from poor regeneration. This study proposes a method of doping FMBO into GOCS to obtain a recyclable adsorbent (Fe/Mn-GOCS), which shows a high removal efficiency of As(III) in aqueous solutions. This study provides new insights into the efficient removal of heavy metals from aquatic environments using binary polymer composites modified by binary metal oxides.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Qi Chen, Guiwei Li, Zhili Lu, Yuliang Su, Bin Wu, Baoyou Shi
Summary: This study investigated the removal of manganese(II) by granular activated carbon (GAC) filtration. The results showed that biological GAC filter columns were effective in reducing Mn(II) levels, while sand filter columns did not show significant Mn(II) removal capability. Water quality changes, pretreatment with NaClO, and MnOx coating on GAC media surface did not affect the Mn(II) removal capacity of GAC filters.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Songxue Wang, Qianqian Wu, Rui Huang, Yuan Guo, Boyin Yan, Xiujuan Hao, Jincheng Li, Wenxiang Xia, Jiayu Tian
Summary: A hybrid process of catalytic ceramic membrane integrated with granular activated carbon (GAC) was proposed for removal of organic pollutants in water. The integrated process showed excellent removal efficiency and resistance to humic acid and various anions. Hydroxyl radicals and sulfate radicals were identified as the major reactive species responsible for the degradation process. The integrated process provides a proposed strategy for enhancing the remediation of organic pollutants.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Peng Chen, Zhiliang Cheng, Xuan Zhang, Liping Zhang, Xingzong Zhang, Jinshan Tang, Facheng Qiu
Summary: An integrated process of Ti-Mn oxides catalytic ozonation and ceramic membranes (CM) was proposed to degrade dye wastewater. TiO2/MnO2 hybrid catalysts were loaded on the surface of CM to prepare a reactive ceramic membrane (TiO2/MnO2-CM). The system showed high degradation efficiency and permeate flux. The study revealed that TiO2/MnO2-CM could increase the concentration of ozone in water and catalyze ozone to produce more hydroxyl radicals.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Zarafshan Ali, Amir Ikhlaq, Umair Yaqub Qazi, Asia Akram, Iftikhar Ul-Hasan, Amira Alazmi, Fei Qi, Rahat Javaid
Summary: This research investigated the efficiency of the catalytic activity of iron and manganese-loaded sodium zeolite for removing disperse yellow 42 dye through ozonation. The impregnation method was used to deposit Fe and Mn on the surface of sodium zeolite. Various factors such as ozone dose, contact time, pH, catalyst dose, and hydroxyl radical scavenger action greatly influenced the efficiency of dye removal. The study also examined the chemical oxygen demand (COD) removal in real textile wastewater and found that catalytic ozonation resulted in a higher efficiency compared to ozonation alone.
Article
Engineering, Environmental
Qian Wang, Can He, Yue Shan, Zhongguo Zhang, Jiuyi Li
Summary: The aim of this study was to investigate the degradation efficiency and mechanism of atenolol (ATL) using Al2O3 supported manganese-cerium mixed oxides (Mn-Ce@Al2O3) as a catalyst for catalytic ozonation. Mn-Ce@Al2O3 with 0.2 wt% manganese and 0.2 wt% cerium showed excellent catalytic performance, leading to complete ATL degradation and 63% mineralization. The catalyst had a high specific surface area due to the presence of Mn-Ce solid solution on the surface, which promoted the formation of oxygen vacancies and electron transfer. O-2(center dot-) and center dot OH were identified as the main active radicals for ATL degradation and mineralization.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Guangsong Lu, Yunqian Ma, Lihua Zang, Yan Sun, Fei Yu, Rong Xue
Summary: The study demonstrated that FeGAC significantly reduced the start-up time of the anammox system and improved nitrogen removal efficiency. Additionally, FeGAC enhanced the growth and aggregation of anammox bacteria, showing great potential for practical application of the anammox process.
Article
Engineering, Chemical
Lei Guo, Zhiqiang Xiao, Wenquan Sun, Hao Xu, Yanhua Xu, Huaili Zheng, Yongjun Sun
Summary: In this study, a honeycomb ceramic catalyst Fe/Mn@CH with high catalytic activity was prepared and its optimal working conditions and mechanism in the degradation of Fischer-Tropsch synthesis wastewater were systematically studied.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Umair Yaqub Qazi, Rabia Iftikhar, Amir Ikhlaq, Ibtsam Riaz, Rashid Jaleel, Rabia Nusrat, Rahat Javaid
Summary: Due to continuous industrialization, the discharge of hazardous dyes has caused significant environmental problems. This study investigates the effectiveness of Fe-RGO/O-3 process for the removal of dyes and finds that Fe-RGO is an excellent catalyst in the catalytic ozonation process, especially in the presence of radical scavengers.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
L. Jothinathan, Q. Q. Cai, S. L. Ong, J. Y. Hu
Summary: The novel Fe-Mn/PAC pellet prepared by a sol-gel method displayed enhanced removal efficiency of COD and phenol in phenolic wastewater during microbubble ozonation, with a high ozone conversion rate. The Fe-Mn/PAC pellet also significantly increased the exposure of hydroxyl radicals and promoted their generation, leading to reduced ozone consumption and a lower ratio of ozone consumption to COD removal.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Qiu-Yi Dong, Yu-Chun Fang, Bin Tan, Aura Ontiveros-Valencia, Ang Li, He-Ping Zhao
Summary: In this study, diatomite coated with Fe-Mn oxides (DFMO) was synthesized and its adsorption performance towards antimonate was investigated. The results showed that acidic conditions favored the adsorption of antimonate, but neutral pH was more effective when treating electroplating wastewater. Fluoride ions strongly inhibited the adsorption of antimonate, indicating the necessity of pre-treatment before the adsorption process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Yulin Sun, Peixi Liu, Zhihua Wang, Hairong Tang, Yong He, Yanqun Zhu
Summary: A series of Cu-Mn oxides catalysts were synthesized using different precipitants for the catalytic ozonation of ethyl acetate (EA). CuMn-II with H2C2O4 as precipitant exhibited the best catalytic activity due to its abundant surface defects, oxygen vacancies, larger specific surface area, higher content of Mn3+, and more acid sites.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yiming Su, Katherine R. Muller, Hira Yoshihara-Saint, Issam Najm, David Jassby
Summary: The study developed a flow-through, electrically charged, granular-activated carbon-filled column for effective nitrate removal from groundwater. High removal rate was achieved through a combination of electrosorption and electrochemical transformation, with the column being readily regenerated by reversing the polarity of the applied potential.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Kang-He Zhao, Yu-Long Ma, Feng Lin, Shao-Ying Ge, Li Zhu
Summary: The Mn-Cu-Ce tri-metal oxide supported on gamma-Al2O3 catalyst showed improved catalytic ozonation performance in treating coal chemical wastewater, significantly enhancing removal of TOC and improving biodegradability. The synergy between Mn, Cu, and Ce oxides enriched catalytic active sites and promoted the generation of center dot OH radicals, leading to effective degradation and mineralization of pollutants in the wastewater. Additionally, the catalyst exhibited good stability over multiple treatments, making it a promising candidate for advanced treatment of organic wastewaters through catalytic ozonation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Yue Liu, Meiqian Lu, Yeran Yin, Jian Zhou, Guangzhou Qu, Ying Zhang, He Guo, Shoufeng Tang, Chao Liu, Tiecheng Wang
Summary: In this study, a glow discharge plasma (GDP) system was established to decompose heavy metal-organic complexes. The technique showed great performance in water environment and has potential applications in the removal of other heavy metal complexes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Liling Zhou, Ruigang Wang, Yue Liu, Ying Zhang, Jian Zhou, Guangzhou Qu, Shoufeng Tang, Tiecheng Wang
Summary: This study investigated the conversion behaviors and risks of polystyrene nanoplastics (PSNPs) in water under oxidation exposure. The results showed that the conversion of PSNPs may pose a threat to the formation of disinfection byproducts (DBPs).
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Deling Yuan, Kai Yang, Eryu Zhu, Xiongbo Li, Mengting Sun, Lichun Xiao, Qiga Hari, Shoufeng Tang
Summary: In this study, an EC/Fe2+/PAA process was established for efficient removal of organic dyes. The results showed that hydroxyl radicals (OH), organic radicals (CH3CO2·, CH3CO3·), and singlet oxygen (O-1(2)) were the dominant species generated from the activated PAA by the synergetic effect of EC and Fe2+.
Article
Engineering, Chemical
Yao Xiang, Huilin Liu, Eryu Zhu, Kai Yang, Deling Yuan, Tifeng Jiao, Qingrui Zhang, Shoufeng Tang
Summary: This article reviews the development of inorganic heterogeneous co-catalytic Fenton methods in wastewater treatment. It summarizes two distinct types of catalysts, transition metals and non-metals, discusses their reaction mechanisms and advantages/disadvantages in practical applications, and proposes four optimization methods and future research needs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Deling Yuan, Zhihui Zhai, Eryu Zhu, Huilin Liu, Tifeng Jiao, Shoufeng Tang
Summary: This study established a UV/SPB synergistic system to effectively remove HA from water, determined the factors influencing HA elimination, and explored the mechanisms of synergy and HA degradation.
Article
Engineering, Civil
Xingyu Tan, Zhi Fang, Zhongli Peng, Hui Zheng, Shoufeng Tang, Yuan Liao
Summary: This paper proposes a prefabricated steel-UHPC composite deck system equipped with notched perfobond strips for cable-stayed bridges, and develops a prediction method for crack widths at wet joints.
ENGINEERING STRUCTURES
(2022)
Article
Chemistry, Analytical
Bencheng Yu, Zihui Ren, Shoufeng Tang
Summary: This paper proposes a robust resource allocation algorithm for reconfigurable intelligent reflector (RIS) systems based on imperfect channel state information. The algorithm addresses the issues of channel uncertainty, user information leakage, and harvested energy improvement. Simulation results demonstrate the algorithm's superiority in terms of fairness of harvested energy compared to traditional robust algorithms.
Article
Engineering, Chemical
Shoufeng Tang, Huilin Liu, Eryu Zhu, Tongtong Zhao, Zetao Wang, Tifeng Jiao, Qingrui Zhang, Deling Yuan
Summary: This study established a boosted PDS/Fe2+ Fenton-like system using PCA as a complexing reagent, which efficiently eliminated typical dyes and antibiotics. The system performed well under various conditions and showed that sulfate radical was the dominant active substance responsible for pollutant removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Bencheng Yu, Zihui Ren, Shoufeng Tang
Summary: This paper studies the robust beamforming problem in dense transmission systems with imperfect channel state information. By applying the uplink-downlink duality theory, the non-convex optimization problem can be transformed into an equivalent uplink decoupling optimization problem. For finite systems, an instantaneous updating uplink-downlink power algorithm is proposed, relying on instantaneous CSI. For massive MIMO systems, an updating uplink-downlink power algorithm is proposed, which only requires statistical CSI.
Article
Engineering, Environmental
Shiyu Pan, Tongtong Zhao, Huilin Liu, Xiongbo Li, Mengzhen Zhao, Deling Yuan, Tifeng Jiao, Qingrui Zhang, Shoufeng Tang
Summary: This study proposes the use of tungsten di-sulfide as a cocatalyst to enhance the Fenton-like system for metro-nidazole degradation. The results show that WS2 accelerates the Fe3+/Fe2+ circulation and H2O2 disintegration, with hydroxyl radicals and carbonate radicals identified as crucial species for MTZ decomposition.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Kai Yang, Zhihui Zhai, Huilin Liu, Tongtong Zhao, Deling Yuan, Tifeng Jiao, Qingrui Zhang, Shoufeng Tang
Summary: In this study, the effective activation of peracetic acid (PAA) by natural chalcopyrite (CuFeS2) was reported for the first time to eliminate metronidazole (MTZ) pollutants. Various factors, including PAA concentration, CuFeS2 dosage, initial pH, initial MTZ concentration, and water matrix, were examined for their influence on MTZ decontamination. The results showed that high MTZ degradation (83.92%) was achieved after 30 minutes under conditions of 460 mu M PAA, 4 g L-1 CuFeS2, and initial pH 3. CuFeS2 exhibited satisfactory recyclability after multiple cycles. The study also identified the presence of hydroxyl radicals, organic radicals, and ferryl ion species in the synergistic system, with hydroxyl radicals contributing mainly to MTZ degradation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Shoufeng Tang, Eryu Zhu, Zhihui Zhai, Huilin Liu, Zhibing Wang, Tifeng Jiao, Qingrui Zhang, Deling Yuan
Summary: We used gallic acid (GA) as a complexing agent to stabilize the regeneration of Fe2+ during the Fe2+/peroxydisulfate (PDS) Fenton-like reaction to remove metronidazole (MTZ). By optimizing the dose of GA and Fe2+ and pH conditions, we achieved an 83% removal rate of MTZ at a GA:Fe2+ molar ratio of 1:1 (30 μM) and initial pH of 5 and 6.2 after 120 minutes. The Fe2+ and GA complexes expanded the pH range and effectively stabilized the regeneration of Fe2+, resulting in the decontamination of MTZ. The presence of sulfate radical (SO4.-), hydroxyl radicals, and singlet oxygen in the ternary system contributed to MTZ removal, with SO4.- playing a dominant role.
Article
Geosciences, Multidisciplinary
Ye Zhang, Shoufeng Tang, Ke Shi, Xiamin Tong
Summary: In order to establish an effective coal mine floor water inrush prediction model, a neural network prediction method based on an improved SMOTE algorithm and an optimized deep confidence network was proposed. The superiority of this method was verified by comparing the actual condition and the prediction of a typical mining area in North China, achieving a prediction accuracy of 94% for coal mine water inrush.
Article
Environmental Sciences
Yao Xiang, Deling Yuan, Eryu Zhu, Tongtong Zhao, Tifeng Jiao, Qingrui Zhang, Shoufeng Tang
Summary: By utilizing molybdenum carbide as a cocatalyst, the reduction of Fe3+ was enhanced in the activation of peroxydisulfate for efficient degradation of dexamethasone. The proposed Fe3+/PDS/fi-Mo2C system can effectively remove dexamethasone in a wide pH range. The reaction mechanism and cycling process were clarified.
Article
Engineering, Electrical & Electronic
Li Shidang, Wei Mingsheng, Zhao Juan, Liu Jiayue, Tang Shoufeng
Summary: This paper proposes an algorithm for future cellular Internet-of-Things (IoT) networks that ensures fairness-aware energy efficiency maximization in the short packet domain, meeting the requirements of ultra-high reliability and ultra-low latency.
JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY
(2022)