Article
Geosciences, Multidisciplinary
Fang Xia, Xiang Niu, Liyin Qu, Randy A. Dahlgren, Minghua Zhang
Summary: Integrated source apportionment and risk assessment for metals in urban watersheds is crucial for pollution control, with risk assessment indicating high levels for copper and cadmium, and different toxicity coefficients influencing total risk levels.
Article
Environmental Sciences
He Xiao, Asfandyar Shahab, Feng Ye, Gangjian Wei, Jieyue Li, Liming Deng
Summary: This study investigated the distribution, pollution level, quantitative source apportionment, and source-specific ecological risk of 10 heavy metals in surface sediments of the Pearl River Estuary. The results showed that the heavy metals were enriched in the inner Pearl River Estuary, with mercury posing an extremely high pollution level and cadmium and zinc showing moderate to high contamination potential. The study also identified natural geogenic and industrial manufacturing sources as the main contributors to the heavy metal pollution. However, the source-specific risk assessment indicated that mixed anthropogenic sources, particularly from surrounding cities, strongly affected the ecological risks.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Chen Wen, Shijun Zhu, Nihong Li, Xia Luo
Summary: This study assessed the spatial distribution and risks of heavy metal elements in surface water and periphytic biofilm samples collected from the Lancang River in China. The results showed that heavy metal levels were significantly higher in the biofilm samples than in the surface water samples. The biofilm samples were mainly polluted by industrial activities, followed by a mixed source of natural and agricultural activities, and traffic emissions. The findings highlight the potential threat of biofilms to ecological and human health.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Reyhane Madadi, Nezha Mejjad, Gabriel Enrique De-la-Torre
Summary: Surface sediment and water samples were collected from Musa Estuary and analyzed for metals concentrations using ICP-MS. Cd had the highest contribution to ecological risk (49% based on PERI index). The Tessier procedure revealed that with increasing contamination, exchangeable and carbonate fractions of Cd, Pb, Ni, Zn, and Cu increased. Cd and Pb were found to have a high risk of release based on the mobility factor and individual contamination factor indices. Cluster analysis showed different sources for different metals. The adsorption of Co, Ni, V, and Zn to sediments was influenced by Eh/pH, DOC/temperature, and salinity.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Jing Wang, Yijia Zheng, Yi Li, Yingbin Wang
Summary: This study analyzed the concentration of heavy metals in surface seawater in the Zhoushan fishing ground during the wet and dry seasons. Four potential sources of heavy metal pollution were identified using a positive matrix factorization model and correlation analysis. The health risk assessment revealed that the non-carcinogenic risk for adults and children was acceptable, and the carcinogenic risk was at a low level. Industrial and traffic sources were found to be the main contributors to pollution.
MARINE POLLUTION BULLETIN
(2023)
Article
Biodiversity Conservation
Siddhant Dash, Smitom Swapna Borah, Ajay S. Kalamdhad
Summary: This study aimed to evaluate sediment pollution loadings and ecological risks, with three objectives. Through hierarchical clustering and principal component analysis, it was found that wetlands are most affected during the post-monsoon season, with most sites falling under moderate risk category. Cd was identified as the primary contributor to ecological risk. Chemical speciation analyses revealed different heavy metals' availability forms in sediment, highlighting the negative impact of Cr, Mn, and Mg on aquatic ecology.
ECOLOGICAL INDICATORS
(2021)
Article
Geochemistry & Geophysics
Huaming Du, Xinwei Lu
Summary: This study investigated the pollution status of heavy metals in surface sediments of the Mianyang section of the Fujiang River in Mianyang City, and analyzed their sources and potential ecological risks. The results showed that the levels of heavy metal content varied at different sites due to urban human activities, with As and Co posing the highest ecological risks. The mixed source was identified as the primary anthropogenic source in the Mianyang section.
Article
Engineering, Environmental
Qi'en Ouyang, Juan Liu, Wenhuan Yuan, Xudong Wei, Yanyi Liu, Zhi'an Bao, Yeliang Huang, Jin Wang
Summary: This study used high-precision Tl isotopic compositions to investigate the migration pathway and source apportionment of Tl in sediments from a pyrite mine area in south China. The results showed that anthropogenic Tl sources had the greatest influence on the Tl isotopic fractionation in the sediments. Additionally, a ternary mixing model revealed that waste from pyrite mining activities affected the downstream sediments up to 10 km. These findings highlight the significance of Tl isotopic signature in tracing Tl contamination sources and guiding targeted remediation efforts.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Banan Soukarieh, Mostafa Hamieh, Inas Abdel Malak, Helene Budzinski, Farouk Jaber
Summary: In this study, the contamination source and ecological risk of organochlorinated compounds in the Litani system were investigated for the first time. The levels of polychlorinated biphenyls (PCBs) and organochlorinated pesticides (OCPs) were assessed in surficial sediments. The results showed that the levels of OCPs were significantly higher than those of PCBs, and the contamination mainly originated from agricultural activities in the surrounding areas of the Litani River.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Banan Soukarieh, Mostafa Hamieh, Inas Abdel Malak, Helene Budzinski, Farouk Jaber
Summary: This paper investigates the contamination source and ecological risk of organochlorinated compounds in the Litani system. The levels of PCBs and OCPs were assessed in surficial sediments, and the results showed that the levels of OCPs were significantly higher than those of PCBs. The overall eco-toxicological risk imposed by the organochlorine contamination was considered low, with the contamination primarily coming from agricultural activities in the surrounding areas of the Litani River.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Zeyu Yang, Keval Shah, Sonia Laforest, Claire Courtemanche, William Durand, Patrick Lambert, Bruce P. Hollebone, Carl E. Brown, Michael Goldthorp, Kevin Watson, Chun Yang, Diane Dey, Vanessa Beaulac
Summary: The study revealed the presence of various petroleum-related compounds in the sediments of the St. Clair River, with higher levels typically found in river bottom sediments. While the detected PAHs at most sampling sites were not found to be potentially toxic to benthic organisms, some light molecular weight PAHs in part of the river bottom sediments may have adverse impacts on sediment-dwelling organisms.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Chushan Huang, Lijuan Zhang, Jiuling Meng, Yunjiang Yu, Jianying Qi, Peng Shen, Xin Li, Ping Ding, Mianbiao Chen, Guocheng Hu
Summary: This study investigated the characteristics of heavy metals in urban road dust from different cities and functional areas in the Pearl River Delta, South China. The results showed that the contamination levels of heavy metals were higher in industrial and commercial areas, with Foshan City having the highest contamination. Industrial activities, traffic activities, and building pollution were identified as the main sources of heavy metal contamination. While there were no significant carcinogenic and noncarcinogenic risks for adults, children showed significant noncarcinogenic effects from exposure to As and Cr, despite the low contamination levels of these metals. Ingestion was identified as the main pathway for heavy metal exposure through urban road dust.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
He Xiao, Asfandyar Shahab, Beidou Xi, Qixin Chang, Shaohong You, Jieyue Li, Xiaojie Sun, Hongwei Huang, Xiangkui Li
Summary: This study collected 61 sediment samples along the Lijiang River to analyze pollution levels and ecological risks. The results showed high concentrations of Cd, Hg, Zn, and Pb in the river sediments, with the midstream area being the most polluted and posing a higher potential ecological risk, primarily due to urbanization and agricultural activities.
ENVIRONMENTAL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Teng-Fei Ma, Jin Wu, Yi-Chang Yu, Ting-Ting Chen, Yuan Yao, Wei-Ling Liao, Li Feng, Jiang Pan
Summary: The study analyzed and assessed the levels of six heavy metals in sediments from the upper reaches of Liangtan River. It found that the contamination level and potential risk of heavy metals were low in the sediments.
Article
Environmental Sciences
Aimei Zhu, Jihua Liu, Shuqing Qiao
Summary: This study quantitatively identified the sources of nine heavy metals in the sediments of the Bohai Sea and found that most metals were below detectable contamination levels. However, Cd and Hg were moderately to significantly enriched, posing potential risks to aquatic ecosystems. Anthropogenic activities and atmospheric deposition were likely the main sources of these two metals.
MARINE POLLUTION BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
Jinyan Cui, Wei Zhan
Summary: Demonstrating lipid assembly chemistry to a general audience can be challenging due to physical and intellectual complexities. This demonstration offers a modular and progressive learning approach, using three hands-on experiments to convey key concepts and cover the important area of lipid phase separation in current membrane biophysics research.
JOURNAL OF CHEMICAL EDUCATION
(2022)
Article
Materials Science, Ceramics
Pan Wang, Ce Fu, Wei Zhan, Rong-Hua Zhang, Luo-Yi Yan, Zheng Cheng, Xin Zhang, Xin-Wen Zhou
Summary: The rheological phase method (RPM) is a green synthesis method that can produce nanoscale LaXO3 (X = Co, Mn, Ni) catalysts with high catalytic activity. The catalysts synthesized by RPM have a nanoscale porous structure and a small amount of residual carbon, resulting in improved oxygen reduction reaction (ORR) performance compared to the solid-phase method. Among the three catalysts, LaMnO3 exhibits the strongest ORR activity with a calculated electron transfer number close to 4 and a kinetic current density of 6.63 mA cm-2, both higher than LaCoO3 and LaNiO3. This study provides a new green synthesis method for perovskite oxygen reduction catalysts.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Daikun Li, Wei Zhan, Xinlei Gao, Qi Wang, LiPin Li, Jun Zhang, Guiyuan Cai, Wei Zuo, Yu Tian
Summary: In this study, an aminated waste paper (WP-NH2) membrane was successfully prepared by oxidation, grafting, and crosslinking of polyethyleneimine (PEI) on various types of waste paper. WP-NH2 exhibited high adsorption capacity for anionic dyes and antibiotics and remained stable after multiple regenerations. Mechanistic studies revealed the adsorption mechanisms for different contaminants. The WP-NH2 membrane efficiently filtered out dyes and antibiotics from water, showing high selectivity and potential application in industrial wastewater remediation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Daikun Li, Wei Zhan, Wei Zuo, LiPin Li, Jun Zhang, Guiyuan Cai, Yu Tian
Summary: Developing hydrogel adsorbents with both high mechanical property and high adsorption capacity is challenging due to the conflict between swelling and adsorption. This study proposes a method of preparing advanced hydrogel adsorbents with high entanglements and low crosslinks. Highly entangled hydrogels exhibit high elasticity, low hysteresis, and good fatigue resistance, while abundant carboxyl functional groups serve as sites for adsorbing pollutants and regulating swelling. Compared with highly crosslinked hydrogels, highly entangled hydrogels show significantly improved adsorption capacity and rate, as well as efficient deswelling during regeneration.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Lixin Li, Ying Lv, Chao Jia, Dawei Yin, Zilong Dong, Zhaoshun Zhan, Jiazhen Han, Jun Zhang
Summary: Sludge-cyanobacteria composite carbon (SCC) was successfully synthesized and showed excellent adsorption performance for heavy metal removal. The adsorption mechanism was investigated and the results provided theoretical and experimental basis for understanding the performance of composite carbon materials.
Article
Automation & Control Systems
Jiayuan Zhang, Wei Zhan, Mehrdad Ehsani
Summary: In this paper, a hidden Markov model (HMM) is utilized to diagnose the severity of interturn short-circuit (SC) fault in permanent magnet synchronous motors (PMSMs). The diagnosis result extends a similar result for DC motors. A bisecting search method is proposed to reduce torque ripples and maintain maximum torque capability when the fault allows motor operation. The advantages of the new fault-tolerant control (FTC) method over existing methods in the literature are analyzed. Significantly reduced torque ripples compared to existing FTCs and the assumption of SC resistance equal to zero made in another paper is eliminated.
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Qing-Ping Xie, Wei Zhan, Jian-Zhi Shi, Feng Liu, Bao-Long Niu, Xue He, Meng Liu, Jing Wang, Qi-Qi Liang, Yue Xie, Peng Xu, Xu Wang, Bao Lou
Summary: By studying the genome sequence of Larimichthys polyactis, researchers have revealed the evolutionary relationship between L. polyactis and Larimichthys crocea. They have identified the male-specific gene dmrt1 and its upstream regulatory gene rnf183, which showed sexually dimorphic expression. Comparative genomic analysis also revealed chromosome rearrangements and translocations between the two species. The findings not only contribute to understanding the genetic basis of hermaphrodite evolution but also provide valuable insights for fish aquaculture improvement.
MOLECULAR ECOLOGY RESOURCES
(2023)
Article
Chemistry, Physical
Huijing Wang, Xi Quan, Qinyi Xiong, Linlin Yin, Yu Tian, Jun Zhang
Summary: In recent years, cuprous oxide (Cu2O) has been recognized as an important photocatalyst for efficient pollutant removal. However, the single Cu2O has shown limited degradation efficiency. In this study, a new photocatalyst (CuCD) was synthesized by coating beta-cyclodextrin on Cu2O, resulting in a significant reduction in particle size. The CuCD exhibited excellent photocatalytic activity, showing 2.0-fold, 1.7-fold, and 2.1-fold increases in the degradation rates of tetracycline (TC), methylene orange (MO), and congo red (CR), respectively, compared to pristine Cu2O. This work demonstrates the synergistic effect of adsorption and photocatalysis by introducing beta-cyclodextrin on Cu2O, providing efficient mass and electron transfer channels for accelerated separation and migration of photogenerated electrons.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hui Jin, Jinyan Cui, Wei Zhan
Summary: A liposome-based micromotor system that achieves directional motion in water by using regional enzymatic conversion and gas generation is presented. These liposomes, composed of low-melting and high-melting lipids along with cholesterol, maintain stable Janus configuration through lipid liquid-liquid phase separation. Local placement of enzymes is achieved through affinity binding, resulting in enzyme-decorated liposomes that undergo directional motion in the presence of substrate hydrogen peroxide. Experimental details on liposome size control, motor assembly, and substrate distribution are provided, highlighting the importance of asymmetry in achieving particle directional motion.
Article
Agricultural Engineering
Yaruo Jin, Wei Zhan, Rui Wu, Yahong Han, Shanshan Yang, Jie Ding, Nanqi Ren
Summary: This study investigates the effects of microalgae on simultaneous nitrification and denitrification (SND) in microalgal-bacterial sequencing batch reactors (MB-SBR). The results show that the MB-SBR achieves better performance than the control, with SND efficiency of 68.01% and total nitrogen removal efficiency of 66.74%. Microalgae change the compositions and properties of extracellular polymeric substances (EPS), improving the capacity of nitrogen transfer, conversion, and storage. The study also reveals that microalgae promote the enrichment of functional groups and genes related to SND and introduce diverse nitrogen removal pathways. Co-occurrence network analysis demonstrates the interactions between bacteria and microalgae, highlighting the role of microalgae as keystone connectors in SND.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Qinyu Wang, Wei Zuo, Yu Tian, Lingchao Kong, Guiyuan Cai, Haoran Zhang, Lipin Li, Jun Zhang
Summary: Heavy metals, especially the anionic heavy metal chromium, pose a significant threat to global water resources and human health. In this study, an ultralight nanofibrillated cellulose/chitosan aerogel was developed for efficient removal of both Cr(VI) and Cr(III). The aerogel exhibited high adsorption capacity, excellent selectivity, and mechanical integrity. Additionally, it showed regeneration capability and promising application prospects for alleviating heavy metal pollution in agriculture.
Article
Green & Sustainable Science & Technology
Lu Liu, Jun Zhang, Yifan Chen, Ze Guo, Ganzhan Xu, Linlin Yin, Yu Tian, Stevo Lavrnic
Summary: The treatment of sludge digestion liquid is a challenge in wastewater treatment. In this study, a novel anaerobic fluidized bed membrane bioreactor system (US-AnFMBR) was developed by combining ultrasonic processing and biochar. This system achieved improved sludge properties, removal of pollutants, and mitigation of membrane fouling, allowing for the recovery of nitrogen and phosphorus resources for agricultural reuse.
Article
Environmental Sciences
Wei Zuo, Zhiwei Chen, Jun Zhang, Wei Zhan, Huili Yang, Lipin Li, Weichen Zhu, Yuqing Mao
Summary: The microalgae-based system is increasingly recognized as an efficient method for wastewater treatment, offering high quality effluent, low carbon emission, and resource utilization. However, the efficiency of the system can be hampered by light masking in sewage. This study investigated the effect of cerium on nutrient removal in an algae wastewater treatment system using laboratory scale experiments with Chlorella under different light intensities. The results showed that under optimal conditions, the system achieved high removal rates for NH4-N, TP, and COD, and cerium played a crucial role in activating protein synthesis and antioxidase. Excessive cerium could be toxic, but this toxicity could be alleviated by strong light and the activation of SOD and CAT enzymes. Overall, this research contributes to the development of microalgae-based systems for wastewater treatment and provides insights into improving light utilization efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Daikun Li, Jun Zhang, Wei Zhan, Guiyuan Cai, LiPin Li, Wei Zuo, Qinyu Wang, Yu Tian
Summary: This study demonstrates the potential application of PSMM-NH2 hollow microspheres in efficient adsorption of anionic dyes with high adsorption capacity and fast adsorption rate. The PSMM-NH2 membrane can be used for both efficient filtration of dyes and separation of oil-water mixtures.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
