Article
Engineering, Environmental
Zitong Xu, Siwei Gu, Dipak Rana, Takeshi Matsuura, Christopher Q. Lan
Summary: The study investigated the removal of Pb2+ ions by chemical precipitation enabled membrane filtration (CPEMF) using microfiltration (MF) and ultrafiltration (UF) membranes. Optimal conditions of 1 mM DIC and pH 8.5 were found to bring the permeate lead level below the drinking water standard, demonstrating the effectiveness of CPEMF in removing lead ions from water.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Tomohiro Kinoshita, Katsunori Yogo
Summary: A lab-scale continuous CO2 capture system for coal-fired power plants using amine-impregnated solid sorbents was optimized through process simulation. Sensitivity analysis on key parameters was conducted, and the simulation results closely matched experimental values. After confirming the reliability of the simulator, cycle time and process time were optimized to achieve a reduction in regeneration heat without compromising CO2 capture efficiency.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Environmental Sciences
Elio Fiorito, Giovanni E. Porcedda, Laura Brundu, Cristiana Passiu, Davide Atzei, Guido Ennas, Bernhard Elsener, Marzia Fantauzzi, Antonella Rossi
Summary: This study investigates the sorption mechanism of calcite on lead ions and finds that calcite can effectively remove lead ions from wastewater within a wide range of initial concentrations.
Article
Environmental Sciences
Jinshan Wei, Bo Shen, Gan Ye, Xianghua Wen, Yonghui Song, Jin Wang, Xiaoguang Meng
Summary: Developed acrylic amine fiber (AAF) for adsorption removal of Selenium (Se) and arsenic (As) from water. Maximum adsorption capacities at neutral pH were found, along with effects of different organic acids and inorganic anions on the adsorption mechanism. Column filtration and regeneration results showed potential for reusing spent AAF with little decrease in adsorption capacity.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Ali Ansari, Enrico Tapire Nadres, Minh Do, Debora Frigi Rodrigues
Summary: This study investigated the continuous adsorption of nitrate using an amine-rich polymer composite adsorbent in a fixed-bed column, finding that the adsorption capacity was influenced by flow rate, influent concentration, and bed height. The highest adsorption capacity was achieved at the lowest flow rate and highest influent concentration and bed height.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Physical
Ofri B. Zusman, Amir Perez, Yael G. Mishael
Summary: The research thoroughly investigated the adsorption mechanism of three chemically-diverse micropollutants on CPN, showing that both anionic and cationic exchange sites coexist on the CPN and can adsorb simultaneously without compromising each other. The adsorption of non-ionic micropollutants was enhanced in the presence of charged micropollutants due to a synergistic effect. The study also demonstrated the efficient filtration of effluent organic matter and micropollutants from TWW by CPN columns compared to granular activated carbon columns.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Environmental
Dawei Zhang, Kejing Zhang, Xiaolan Hu, Qianqian He, Jinpeng Yan, Yingwen Xue
Summary: Cadmium (Cd) pollution is a serious environmental problem with risks to water bodies and human health. This study investigated Cd(II) adsorption onto MgCl2 modified biochar, finding that MgC600 had a higher adsorption capacity due to enhanced ion exchange ability. A quadratic regression model accurately predicted the optimal adsorption conditions, and a new BJP model was proposed for fixed bed filtration process, accurately describing and promoting its application in wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Wei Wang, Mengbo Fan, Jiaming Ni, Weijun Peng, Yijun Cao, Huiyong Li, Yukun Huang, Guixia Fan, Yunliang Zhao, Shaoxain Song
Summary: This study investigates the use of Montmorillonite nanosheet/poly(acrylamide-co-acrylic acid)/sodium alginate hydrogel beads as an adsorbent for dye effluent. The hydrogel beads demonstrate multilayer and heterogeneous adsorption of methylene blue and exhibit excellent dynamic adsorption performance compared to traditional adsorbents. These findings suggest that the hydrogel beads have great potential for practical applications in the treatment of dye effluent.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Olga Gileva, Pabitra Aryal, JunSeok Choe, Yena Kim, Yeongduk Kim, Eunkyung Lee, Moo Hyun Lee, Vitaly Milyutin, KeonAh Shin, Hyojin Yeon
Summary: In the context of the purification program of the AMoRE collaboration, the possibility of deep radiochemical purification of Li2CO3 was examined. Co-precipitation with inorganic salt-based carriers, membrane filtration, and sorption using MDM inorganic sorbent methods were tested and proved successful in removing various impurities. The study provides optimized conditions for high yield and radiopurity of lithium carbonate used for low-radioactive-background experiments with Li-containing detectors.
Article
Engineering, Environmental
Susanna Nilsson, Alicia Ronda, Alberto Gomez-Barea
Summary: The use of alkaline residue from the acetylene industry as in-bed sorbent to remove H2S from syngas was investigated. The reaction rate was affected by the presence of CO2 and H2O in the gas mixture. The sulfidation rate of calcined CS was influenced by operating parameters and showed promising potential as an alternative to conventional sorbents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Chuande Yu, Zhaojiang Wu, Shengye Wang, Qilong Zhong, Bo Yang, Jiajie Xu, Ke Xiao, Eric Guibal
Summary: In this study, a highly stable amine coated alginate melamine (ML/APG) sponge was prepared and applied in a combined process of sorption and desorption for Pd(II) concentration. The sorption and desorption steps were operated in fixed-bed recirculation mode (FR) and one-pass mode (FO) respectively. The results showed that FR can achieve sorption equilibrium with less solution and time compared to FO, and also improved the rational use of the sorbent. The ML/APG sponge exhibited excellent stability and reusability.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Dandan Zhao, Chen Fu, Sudan Lin, Yongzhi Xu, Haoran He, Siyuan Liu, Xueqing Shi
Summary: The study successfully fabricated a novel lead-imprinted PVDF membrane for selective removal of lead from water. The membrane showed high adsorption capacity, fast kinetics, high selectivity, and outstanding regeneration performance. XPS studies revealed that lead uptake was mainly due to the complex reaction between lead and carboxyl and hydroxyl in the membrane.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Antonio Ewerton da Silva Almeida, Gabriela Rezende de Souza, Flavia Vilela Correa, Jaiza Ribeiro Mota e Silva, Luiz Fernando Coutinho de Oliveira, Evelise Roman Corbalan Gois Freire
Summary: This study investigates the removal of Fe2+ from water using bioclastic granules of the algae Lithothamnium calcareum in a fixed-bed column. The results show a removal efficiency of around 50% and high values of retardation factor, indicating strong interaction between the algae and the solute. Evaluation of the mass balance was performed using sigmoidal models to assess the effectiveness of the column experiment.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Khim Hoong Chu, Mohd Ali Hashim
Summary: This study compared four breakthrough curve models and found that the log-Gompertz and Chu-Hashim models performed well in predicting antibiotic breakthrough data, showing strong correlations and accurate breakthrough time predictions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Pummarin Khamdahsag, Dickson Y. S. Yan, Pongnapa Poompang, Nichapa Supannafai, Visanu Tanboonchuy
Summary: Arsenite was effectively removed via oxidation and adsorption in fixed-bed columns using K-OMS2 and Fe-BTC. K-OMS2 showed high efficiency in oxidizing As(III) to As(V) with leached Mn and K concentrations below the groundwater standard. Fe-BTC exhibited good adsorption capacity for As(V) with low Fe leaching and more than 75% removal efficiency. In the combined use of the two columns, over 62% of total As was removed under optimal conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Jinshan Wei, Jin Wang, Xiaoming Sun
Summary: In this study, a novel H2O2 treatment strategy was developed to enhance the urea oxidation reaction (UOR) efficiency of NiFe-layered double hydroxides (NiFe-LDH). The H2O2-treated sample showed significant catalytic activity enhancement, and this strategy can also be applied to other electro-catalytic oxidation reactions.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Jian Wang, Yucheng Tian, Jian Wei, Chunjian Lyu, Huibin Yu, Yonghui Song
Summary: This study conducted a long-term experiment using A2O-MBR system to analyze the effect of DBP on bacterial community and their carbon and nitrogen metabolic pathways. The results showed that DBP significantly influenced the structure of bacterial community, resulting in reduced bacterial diversity and decreased COD and TN removal efficiency.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Chemical
Zhuang Guo, Jian Wei, Zongkun Wu, Yanfei Guo, Yonghui Song
Summary: Maintaining perfect activity and stability in catalytic ozonation system has always been a challenge. This study synthesized a Cu-doped g-C3N4 material, which showed a significant enhancement of reaction rate and high stability in the system. The study also proposed a novel catalytic mechanism involving the Lewis acid site inducing surface hydroxyl groups to promote the generation of (OH)-O- circle.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Shilong Li, Liang Duan, Yonghui Song, Slawomir W. Hermanowicz
Summary: Membrane bioreactors (MBR) have been widely used in wastewater treatment due to their high effluent quality and low sludge generation. The sludge retention time (SRT) is an important parameter in MBR operation, which directly affects the microbial community. This study investigated the microbial communities of three different MBRs at short SRTs using microarray analysis. The results revealed significant differences in microbial composition, including the dominant phylum, Proteobacteria, and the dominant group at the class and order level between the MBRs with different SRTs.
Article
Biochemistry & Molecular Biology
Yang Zhao, Liang Duan, Xiang Liu, Yonghui Song
Summary: OsMFCs are a novel wastewater treatment technology that uses FO membrane to reduce membrane resistance for enhanced electricity generation. The water flux characteristics and unique characteristics of the membrane material have a significant impact on power generation. The membrane microenvironment plays a crucial role in reducing membrane impedance.
Article
Environmental Sciences
Liangjie Wang, Juan Li, Xinyao Liu, Jiali Zhang, Ping Zeng, Yonghui Song
Summary: In this study, the role of singlet oxygen (1O2) in the removal of organic compounds was evaluated. The results showed that surface-bound SO4·- was the dominant species, and the quenching effect of FFA was not solid evidence to identify 1O2. It was also found that the selective removal of some organics was due to the good ability of corresponding inorganic radicals (Cl·, NO3·, HCO3·, or HPO4·) to degrade these organics, rather than 1O2 as the key reactive oxygen species.
Article
Environmental Sciences
Guanying Wang, Guanglei Qiu, Jian Wei, Zhuang Guo, Weiye Wang, Xiaoling Liu, Yonghui Song
Summary: With the development of industries, explosion accidents occur frequently during production, transportation, usage, and storage of hazardous chemicals. The activated carbon-activated sludge (AC-AS) process shows promising potential in efficiently treating wastewater with high concentrations of toxic compounds. In this study, AC and AS were used to treat wastewater from an explosion accident, resulting in increased removal efficiency and shortened treatment time compared to traditional processes. Metagenomic analysis and spectroscopy were used to explore the enhancement mechanism of AC on AS, revealing the important roles of certain bacteria and genes in pollutant degradation. This study demonstrates the universal characteristics of the AC-AS process for treating wastewater with high levels of organic matter and toxicity.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Xinyu Dong, Wenxuan Yi, Peng Yuan, Yonghui Song
Summary: Implementing runoff control infrastructure is an effective measure in stormwater management, but its cost-effectiveness is a major concern. Existing studies mainly focus on optimizing the cost-effectiveness of runoff control infrastructure, neglecting potential layout scenarios with high extra environmental benefits. This study quantified a carbon dioxide equivalent-based index to represent the extra environmental benefits and integrated it into the assessment framework.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Lijie Duan, Jian Wei, Jinshan Wei, Minghao Wang, Yong Wang, Xue Cheng, Mengbin Gu, Xinyi Zhang, Xianghua Wen, Yonghui Song
Summary: In this study, boron nitride (BN) photocatalysis was found to effectively degrade 6:2 FTS with a removal rate of 100%, a degradation rate of 1.8 h-1, and a defluorination rate of 57.3%. The superior performance of BN was attributed to oxygen dopants defects, and ball-milled BN with increased oxygen dopants exhibited a higher degradation rate of 2.88 h-1. Furthermore, the study demonstrated that holes (h+), hydroxyl radicals (center dot OH), and superoxide (center dot O2-) played significant roles in the heterogeneous photocatalytic degradation of 6:2 FTS.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Jian Wang, Dongping Liu, Huibin Yu, Yonghui Song
Summary: This study investigates the inhibitory effect of dibutyl phthalate (DBP) on dissolved organic matter (DOM) removal from wastewater. It is found that DBP has a stronger inhibition on the removal of tryptophan-like and tyrosine-like DOM fractions. Additionally, the concentration of DBP also affects the metabolic pathways of microorganisms in degrading DOM in anoxic units.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yanchun Xiao, Huibin Yu, Yonghui Song
Summary: The influences of anthropogenic activities on sedimentary fulvic acid (FA) fractions from different reaches of an urban river were identified using fluorescence spectroscopy and correlation spectroscopy. The study found that autochthonous sources were more significant than terrestrial sources, with the contribution decreasing from rural to urban sections. Six components of FA fractions were identified, and pollution sources were determined. The results also revealed the transformation mechanism of FA fractions and the critical environmental variables affecting the transformation.
Article
Environmental Sciences
Zhuang Guo, Yifan Lv, Jian Wei, Jiali Zhang, Yonghui Song
Summary: In this study, a low-cost FC/HZ catalyst loaded with CeO2 and Fe3O4 was synthesized, which could efficiently degrade sulfamethazine (SMZ) and remove 39.6% of total organic carbon through catalytic ozonation. The FC/HZ catalyst exhibited high catalytic activity over a wide pH range and showed excellent recyclability and stability. The possible catalytic mechanism and degradation pathway of SMZ were revealed through experiments and material characterization. This study offers an effective strategy for preparing recyclable catalysts and eliminating SMZ in aqueous solution.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Chunjian Lyu, Xiaojie Li, Huibin Yu, Yonghui Song, Hongjie Gao, Peng Yuan
Summary: In this study, the researchers monitored the potential nitrification rate, denitrification potential, and net N2O production rate in riparian soils, and used metagenomic sequencing to understand the mechanism of microbial N removal. The riparian soils showed a strong denitrification process, with higher rates of denitrification than nitrification and N2O production. Near farmland edges, the rates of denitrification, nitrification, and N2O production were lower. The composition of the N-cycling microbial community varied between different soil depths.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Chemical
Tianjie Qin, Jinshan Wei, Chucheng Zhou, Xierong Zeng, Ji Zhou, Ya-yun Li
Summary: In this study, a modification strategy based on crystal facets regulation of decahedral bismuth vanadate (BVO) was reported. Ag and MnO2 nanoparticles were assembled on {010} and {110} crystal facets of BVO, respectively, to enhance the catalytic performance in photocatalysis. The results showed that using BAM-1.5, the removal efficiency of CIP and TC reached 93.6% and 93.4% in 100 min, which were 4.23 times and 3.81 times faster than BVO. The enhanced catalytic performance can be attributed to the synergistic effect of local surface plasmon resonance and Z-scheme heterojunction of Ag/MnO2 on the BVO. This work provides an intriguing and feasible solution for the preparation of advanced photocatalyst and pave the way for new catalyst finding.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
