Article
Engineering, Environmental
Huiqing Lian, Yanxia Zhao, Chang Tian, Weiying Xu, Tao Yan, Wen Song, Kaimin Shih
Summary: The innovative preparation of titanium-based coagulants by electrodialysis (ED) method has been shown to improve the coagulation capability, leading to higher removal of organic matter and the production of larger and stronger flocs.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Materials Science, Ceramics
Xiaotong Liu, Ya Chen, Baolin Zhu, Shoumin Zhang, Weiping Huang
Summary: 3-dimensional TiO2 nanoflowers were successfully synthesized via a hydrothermal method with MoS2 and Pt modifiers to enhance photocatalytic activity. MoS2/TiO2-NF (2.0%) showed the best performance for water splitting, while Pt-MoS2/TiO2-NF (2.0%) exhibited enhanced and recyclable photocatalytic activity.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Gancheng Zuo, Yuting Wang, Wei Liang Teo, Qiming Xian, Yanli Zhao
Summary: Constructing direct Z-scheme heterojunction (DZH) is crucial for improving the efficiency and stability of catalysts for photocatalytic water splitting. In this study, ultrathin TiO2 nanosheets were integrated into ZnIn2S4 to produce TiO2-ZnIn2S4 heterostructure nanoflowers, enhancing the overall system performance. The optimized DZH nanoflowers exhibit enhanced PWS activity and excellent stability, making them promising candidates for efficient water splitting applications.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Qiaona Liu, Xin Han, An Qian, Ying Chen, Jichang Liu, Renjie Li, Xin Pu, Lei Ye, Xin Jia, Rongjie Wang, Jiangbing Li, Jigang Zhao, Hui Sun, Hao Ling
Summary: Inexpensive and earth-rich cocatalysts, such as the CoNi alloy, have shown promising potential in improving the photocatalytic hydrogen production performance. A novel CoNi-TiO2 photocatalyst was prepared by hydrothermal and chemical reduction methods, and its enhanced performance was attributed to the accelerated charge transfer and inhibited carrier recombination facilitated by the CoNi alloy. The hydrogen production rate of the CoNi-TiO2 photocatalyst was 24 times higher than that of pristine TiO2, reaching 6580.9 mmol g-1 h-1, comparable to 0.5 wt% Pt-TiO2. This study provides valuable insights for the design of efficient non-precious metal TiO2-based photocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Yu Liu, Yu Xiang, Hui Xu, Huili Li
Summary: This study reports the recycling of coagulated flocs for the production of AlCl3 and TiO2 formed flocs through a simple calcination process. The influence of CO32- concentration and HA molecules on the flocs formation processes was studied. The recycled flocs exhibited high photocatalytic degradation performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Qi Li, Pengcheng Wu, Yufan Huang, Peng Chen, Keliang Wu, Jianning Wu, Yan Luo, Lele Wang, Shengchao Yang, Zhiyong Liu, Xuhong Guo
Summary: Traditional surface-to-surface contact heterojunctions suffer from poor stability and low electron-hole separation efficiency. In this study, a novel lattice embedded ZnO@TiO2(B) nanoflowers were prepared to achieve high-efficiency charge separation and stable photocatalytic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Fengyan Song, Hao Sun, Hailong Ma, Hui Gao
Summary: This study introduces mesoporous titanium dioxide nanoparticles (TiO2) modified with carbon dots (CDs) to enhance photocatalytic efficiency. The results demonstrate that the introduction of CDs significantly improves the photocatalytic degradation efficiency.
Article
Chemistry, Multidisciplinary
Jiawei Wang, Guoqiao Wang, Tian Yu, Nengjie Ding, Meicheng Wang, Yao Chen
Summary: Biochar-modified TiO2 (C/TiO2) was prepared and showed improved photocatalytic performance for NH3-N removal from aqueous solutions. Characterization analyses confirmed the successful modification of biochar on TiO2 and the introduction of -COOH groups, which enhanced the photocatalytic performance. The composite C/TiO2 demonstrated a larger surface area and more pores, along with the presence of typical characteristic peaks of anatase-TiO2. NH3-N degradation mainly resulted in N-2 as the degradation product, indicating the potential of C/TiO2 for wastewater treatment and sewage sludge treatment.
Review
Engineering, Environmental
Yonghai Gan, Jingbiao Li, Li Zhang, Bingdang Wu, Wenguang Huang, Haojie Li, Shujuan Zhang
Summary: Titanium coagulants have attracted attention for their outstanding performance and lack of metal residues, but face challenges in controllability, speciation analysis, and identifying specific application scenarios. Cost reduction and sludge recycling are important measures to promote the future application of titanium coagulants in water treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Dawang Zhou, Hongxia Luo, Fangzhou Zhang, Jing Wu, Jianping Yang, Huaping Wang
Summary: This study demonstrates the efficient degradation of fiber-based microplastics through photocatalytic degradation. The results provide a feasible solution for fast degradation of organic pollutants and offer new insights for environmental remediation strategies in the future.
ADVANCED FIBER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Nikolaos G. Moustakas, Felix Lorenz, Martin Dilla, Tim Peppel, Jennifer Strunk
Summary: Research shows that removing photogenerated holes from TiO2 in gas-solid photocatalytic reactions hinders the production of CH4 in CO2 reduction, and coupling the reaction with sacrificial oxidation reactions also inhibits CH4 formation. Additionally, the addition of H-2 can have detrimental effects on the reaction.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Applied
Lin Yang, Bingbing Zhang, Zhuo Li, Chen Wang, Linyu Jiao, Bing Wang, Yafei Wang, Haixia Ma, Xiaoxun Ma
Summary: Utilizing subphthalocyanine and 4,4'-dihydroxybiphenyl, a novel axial substituted SubPc derivative was synthesized by solvothermal method and decorated onto TiO2 nanoparticles to fabricate a highly efficient photosensitive catalyst. The composite showed outstanding performance in organic dye degradation and demonstrated remarkable stability, providing new ideas for the construction of photosensitive catalysts for water purification based on TiO2.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Fugong Qi, Zhenwen Yang, Qiwen Qiu, Ying Wang, Huijun Li
Summary: In this study, molecular dynamics simulation was used to investigate the TiO2/Ti interfacial reaction. The simulation results revealed that a decrease in oxygen concentration in TiO2 and the formation of defective TiO2 occurred after the interfacial reaction. Based on these findings, defective TiO2 with a narrow band gap was successfully synthesized, and its outstanding photocatalytic activity was demonstrated.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Chi Zhang, Xiurong Yang, Zihan Zhang, Jiachen Li, Wujing Jin, Haixia Ma
Summary: In this study, the decomposition mechanism of ammonium perchlorate (AP) on graphitic carbon nitride (g-C3N4) catalyst was investigated using density functional theory calculation. The main decomposition pathway of AP was found to be HClO4 -> ClO3- -> ClO2- -> ClO- -> Cl-. Additionally, the oxidation of g-C3N4 surface weakened its catalytic capacity for AP decomposition but enhanced its catalytic capacity for the adsorption and dehydrogenation of NH3.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Haiyang Fan, Guiyun Yi, Xiuxiu Zhang, Baolin Xing, Chuanxiang Zhang, Lunjian Chen, Yulong Zhang
Summary: Different from reported core-shell magnetic hybrids, the Fe3O4-TiO2/RGO recyclable photocatalysts have a unique structure that utilizes the magnetism of Fe3O4 while also showcasing its photocatalytic properties in synergy with TiO2 and RGO. The catalyst maintains superior magnetism, stability, and recycling performance, showing high photo-degradation ability under UV-light with optimized composites. The uniform loaded Fe3O4 nanoparticles on RGO accelerate electron transfer and promote the generation of hydroxyl radicals and superoxide anion, leading to outstanding photocatalytic performance for organic water remediation.
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.