Article
Engineering, Environmental
Si Liu, JinHui Huang, Wei Zhang, LiXiu Shi, KaiXin Yi, ChenYu Zhang, HaoLiang Pang, JiaoNi Li, SuZhou Li
Summary: This study investigated the adsorption behavior of Pb(II) on natural-aged and virgin microplastics in different electrolyte solutions. The results showed that natural-aged microplastics had higher adsorption capacity for Pb(II) compared to virgin ones, and the addition of CaCl2 strongly inhibited the adsorption amount of Pb(II). The adsorption kinetics of Pb(II) were better fitted by the pseudo-second order model and Elovich equation and were slowed down greatly at higher ionic strength. The adsorption isotherm of Pb(II) onto microplastics affected by salt ions can be well described by Freundlich model, suggesting a multilayer and heterogeneous adsorption process. pH and fulvic acid in the electrolyte solutions significantly influenced the adsorption of Pb(II) due to changes in electrostatic interactions. Higher pH and ionic strength in different environmental water dramatically decreased the adsorption capacity onto microplastics. The adsorption mechanisms affected by salt ions mainly involve electrostatic interaction, surface complexation, and ionic exchange.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Lingling Wang, Chengxin Guo, Qianqian Qian, Daning Lang, Ronglan Wu, Shawket Abliz, Wei Wang, Jide Wang
Summary: This study comprehensively explored the effects of UV aging and environmental factors on the adsorption of heavy metals by microplastics (PP, PE, and PS). The results showed that aging enhanced the hydrophilicity and oxidation of microplastics, leading to increased adsorption capacity for contaminants compared to pristine microplastics. The adsorption amounts of Pb(II) and Cu(II) by PP, PE, and PS increased by 1.45, 1.46, 1.25 and 1.63, 1.39, 1.22 times, respectively. The adsorption process was governed by chemisorption and nonhomogeneous multilayer adsorption. In a binary composite system, the adsorption capacity of metal ions on microplastics was lower than that in a single system due to a specific inhibitory effect of coexisting ions. External factors such as pH, salinity, and fulvic acid content significantly influenced the adsorption behavior, which was mainly attributed to electrostatic interaction, surface complexation, and van der Waals forces.
Article
Environmental Sciences
Zhukela Lin, Yiwei Hu, Yijun Yuan, Baowei Hu, Binliang Wang
Summary: Microplastics have the potential to concentrate and transport heavy metals in the aquatic environment, with the sorption behavior of heavy metals onto them being pH and ionic strength dependent. Among the tested materials, polyvinylchloride PVC showed the highest maximum sorption capacity for lead (II) under the experimental conditions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Physics, Multidisciplinary
Li-Xin Gao, Xiao-Ke Zhang, An-Lei Zhang, Qi-Ling Xiao, Fei Chen, Jun-Yi Ge
Summary: In this study, an artificial superconducting multilayer was prepared as an alternative approach to study multicomponent superconductivity. The repulsive interactions and coupling strength among superconducting films were controlled by adjusting the thickness of the insulating layer. Magnetization measurements were conducted to investigate the effect of competition between repulsive vortex interactions on macroscopic superconductivity. The vortex phase diagram and optimum critical current density were determined, and a second magnetization effect attributed to the upper layer was observed. These results provide new insights for the study and applications of multilayer superconducting systems.
Article
Environmental Sciences
Huixin Du, Hongzhu Ma, Baoshan Xing
Summary: This study collected and identified naturally weathering plastics to understand their properties under different weathering conditions, and explored the adsorption and desorption of crystal violet on microplastics in various environmental contexts. The results showed that different types of weathered plastics exhibited distinct surface structures, and there were various possible interactions between the organic pollutant and microplastics.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Peng Zhang, Guanghua Lu, Yu Sun, Jiaqi Zhang, Jianchao Liu, Zhenhua Yan
Summary: In this study, the size effects of aged microplastics (AMPs) on the uptake, elimination, tissue distribution, and potential toxicity of roxithromycin (ROX) in Carassius auratus were investigated. The results showed that AMPs promoted the accumulation of ROX in various tissues, and exacerbated the pathological abnormalities induced by ROX. High-throughput sequencing and metabolomics revealed the impact of AMPs and ROX on gut microbiota and metabolites.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Engineering, Environmental
Peng Zhang, Guanghua Lu, Yu Sun, Zhenhua Yan, Tianjian Dang, Jianchao Liu
Summary: The study found that aging of microplastics enhances their adsorption and bioaccumulation of roxithromycin, and combined exposure with antibiotics leads to inflammation and functional abnormalities in the intestines of Carassius auratus. Furthermore, the effects of microplastics and antibiotics on gut microbiota are closely related to carbohydrate and amino acid metabolism activities, as well as the abundance of antibiotic resistance genes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Wei Huang, Jiaqin Deng, Jie Liang, Xinghui Xia
Summary: This study compared the adsorption behavior of lead (Pb(II)) onto environmentally-relevant tire wear particles (TWP), ultraviolet-aged polylactic acid microplastics (UV-PLA), and ultraviolet-aged polystyrene microplastics (UV-PS). The results showed that aging processes significantly improved the adsorption capacity of Pb(II), with TWP having the highest adsorption amount. The mechanisms of adsorption differed for each type of microplastic, with electrostatic interaction and complexation playing important roles. Furthermore, the presence of humic acid affected the adsorption capacity, and the desorption ability of Pb(II) varied among the different microplastics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xinyue Su, Yan Chen, Yanfei Li, Jing Li, Wen Song, Xuguang Li, Liangguo Yan
Summary: The study aimed to improve the efficiency of heavy metal adsorption using biochar-based materials. A composite material (BC-LDH) was prepared by loading MgAl-layered double hydroxide (MgAl-LDH) onto coconut shell biochar (BC) for the decontamination of Pb(II) and Cu(II) in water. The BC-LDH exhibited higher removal capacities for Pb(II) and Cu(II) compared to BC and LDH. Characterization results revealed that the interaction mechanisms between BC-LDH and heavy metals included mineral precipitation, cation exchange and isomorphic replacement, electrostatic attraction, and surface complexation.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Yanji Jiang, Zhiming Qin, Jiao Fei, Dianji Ding, Huimin Sun, Jun Wang, Xianqiang Yin
Summary: This study explored the mechanism of heavy metal adsorption on microplastics in the presence of surfactants. The results showed that the application of surfactants greatly enhanced the adsorption capacity by promoting heavy metal entry into the cracks of microplastics. The pore structure of microplastics was closely related to the adsorption behavior. The desorption process using high concentration of surfactant solution released less heavy metals compared to low concentration solution, primarily due to the crack structure of microplastics. This research contributes to a better understanding of the adsorption mechanism of heavy metals on microplastics in the presence of surfactants, which can help control the ecological risks of microplastics.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Mengchen Xu, Shuncheng Hu, Zhaohao Cui, Changqing Liu, Yihua Xiao, Rutao Liu, Wansong Zong
Summary: Microplastics (MPs) undergo aging in the environment, affecting their physicochemical properties and interactions with biomacromolecules. This study investigated the structural and functional changes of catalase (CAT) induced by virgin and aged PVC-MPs. Results showed that light irradiation aged the PVC-MPs, leading to surface roughness and the presence of holes and pits. Aged MPs had more binding sites than virgin MPs, and they quenched the fluorescence of CAT and interacted with tryptophane and tyrosine residues. The interaction of CAT with aged MPs caused structural changes and dispersion of CAT. However, MPs had no effects on the heme groups and activity of CAT. This study highlights the potential negative effects of MPs on antioxidant enzymes and provides insights into the interaction mechanisms between MPs and biomacromolecules.
Article
Environmental Sciences
Xin Shi, Yue Wang, Xianhong Deng, Wenbin Wu, Wenting Hua, Ziqin Zhou, Kai Xin, Lihong Tang, Zhiyuan Ning
Summary: In this study, a novel magnetic nanoadsorbent was successfully synthesized, which exhibited water stability and biocompatibility in wastewater, and showed high selective capture for Pb(II) and Cu(II). The nanoadsorbent retained high uptake capacity after multiple cycles and had weak interference from other ions. The mechanism of interaction between the nanoadsorbent and heavy metal ions was analyzed based on electrostatic potential and average local ionization energy. The results showed that the interaction was bridged by oxygen active sites. This hierarchical and highly water-dispersible nanoadsorbent has the potential to be used for wastewater treatment.
Article
Environmental Sciences
Ying Chen, Hangzhe Li, Yue Yin, Sujie Shan, Tinglin Huang, Huan Tang
Summary: The interaction between microplastics (MPs) and background organic substances can alter their original binding preferences and lead to a redistribution of these substances. The transfer of polychlorinated biphenyls (PCBs) and hydroxy PCBs from humic acid (HA) to MPs was found to be driven by van der Waals interactions, with hydrogen bonds playing an additional role.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Shi Zhou, Juehao Ai, Jiachang Qiao, Huimin Sun, Yanji Jiang, Xianqiang Yin
Summary: This study focuses on the adsorption mechanism of neonicotinoids on agricultural film microplastics and their effect on the transport of microplastics in quartz sand. The adsorption of neonicotinoids on microplastics was a combination of physical and chemical processes, and appropriate acidity and ionic strength favored the adsorption. The presence of neonicotinoids promoted the transport of microplastics, particularly at low concentrations, and sodium chloride improved their stability. These findings highlight the increased environmental risk posed by the coexistence of microplastics and agricultural chemicals.
Article
Environmental Sciences
Hanghang Zhao, Peiyue Li, Fengmei Su, Xiaodong He, Vetrimurugan Elumalai
Summary: This study assessed the changes in toxicity of polybutylence terephthalate (PBT) microplastics (MPs) following adsorption of heavy metals and antibiotics. The adsorption behavior of Cd(II) and tetracycline (TC) on PBT was investigated, and the results showed that the adsorption process could be described by kinetic and isothermal models. It was also found that the adsorption amount was higher in competitive systems than in single solutions, likely due to the formation of Cd(II)-TC complexes and changes in PBT functional groups.
Article
Engineering, Environmental
Jie Dong, Weihua Xu, Shaobo Liu, Youzi Gong, Ting Yang, Li Du, Qiang Chen, Xiaofei Tan, Yunguo Liu
Summary: A novel magnetic catalyst, CoFe2O4@BC, was developed using alkaline lignin as feedstock for biochar, and successfully activated PAA for sulfamethoxazole (SMX) elimination. The catalyst showed a wider application prospect in treating various wastewater due to its remarkable stability and magnetic separability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Weihua Xu, Ting Yang, Shaobo Liu, Li Du, Qiang Chen, Xin Li, Jie Dong, Zhuang Zhang, Sihui Lu, Youzi Gong, Liang Zhou, Yunguo Liu, Xiaofei Tan
Summary: Iron nanoparticles have been extensively studied and applied in environmental protection due to their unique characteristics. Modified iron nanoparticles can improve the efficiency of pollutant removal, and the use of stable iron nanoparticles may be a solution to overcome aggregation and retention issues. The application of iron nanoparticles has significant effects on environmental pH value, pollutant morphology, and toxicity to microorganisms.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Green & Sustainable Science & Technology
Biao Song, Eydhah Almatrafi, Xiaofei Tan, Songhao Luo, Weiping Xiong, Chengyun Zhou, Meng Qin, Yang Liu, Min Cheng, Guangming Zeng, Jilai Gong
Summary: Biochar has gained attention as an integrated solution for agricultural waste recycling, soil improvement, carbon sequestration, and greenhouse gas reduction. However, the environmental benefits of biochar are hindered by its limited use in soil management, due to a lack of understanding and promotion. This review article discusses biochar applications in agricultural soil systems, focusing on carbon-neutral strategies and the importance of effective agricultural management for carbon sequestration.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Guoyu Li, Genying Zeng, Zhangkai Chen, Jiaming Hong, Xiaodong Ji, Zhiqiang Lan, Xiaofei Tan, Meifang Li, Xinjiang Hu, Chunfang Tang
Summary: The study presented the synthesis of C3N5 nanosheet/Ag2CO3 nanocomposites (CNAC-X) as efficient photocatalysts for the visible-light-driven degradation of methylene blue and tetracycline hydrochloride. Due to the synergistic effect of nanosheet structures, carbon defects, and Z-scheme heterojunctions, CNAC-10 exhibited the highest photocatalytic activity.
Article
Engineering, Environmental
Nan Zhao, Xiaofei Tan, Juan Xiong, Nan Chen, Jia Gao, Rui Wang, Xixiang Yang, Weihua Zhang, Weixian Zhang, Rongliang Qiu
Summary: Fe-based materials have been widely used for the removal of Cr(VI) and As(III) in wastewater, but the quantitative understanding of their removal mechanism and the functions of Fe is still lacking. This study prepared three types of iron carbide based biochar composites with different Fe dosages and found that the Fe dosage has a positive effect on the removal of Cr(VI) and As(III). X-ray absorption near-edge structure analysis and pickling experiment revealed the important role of Fe in the removal process. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy provided insights into the adsorption mechanism, while quenching experiment, electron spin resonance analysis, and XPS analysis contributed to the understanding of the reduction and oxidation process. These quantitative mechanisms improve our understanding of the removal of Cr(VI) and As(III) and can guide the preparation and application of Fe/C composites for the removal of redox-active contaminants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Hailan Yang, Shujing Ye, Han Wang, Chengyun Zhou, Ting Xiong, Yuanyuan Deng, Qianmin Fu, Guangming Zeng, Zhuotong Zeng, Xiaofei Tan
Summary: This paper systematically studied the disinfection byproducts formation potential (DBPFP) of biochar and its derived dissolved organic matter (DOM), and found that different aging processes could increase the DBPFP of biochar. Especially, the DBPFP of biochar increased significantly with chemical aging. Even aged biochar showed potential to reduce DBPFP and integrated toxic risk value of the mixed system when coexisting with the environmental concentration of humic acid.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Engineering, Environmental
Xuemei Zheng, Weihua Xu, Jie Dong, Ting Yang, Zichen Shangguan, Jing Qu, Xin Li, Xiaofei Tan
Summary: This paper summarizes the positive effects of biochar on microorganisms in soil bioremediation, including acting as a shelter, providing nutrients, and improving soil conditions. These effects result in variations in microbial abundance, activity, and community structure. Biochar also acts as an electron mediator to promote electron transfer in microbial degradation. However, the potential toxic substances carried by biochar that can threaten microbial communities should not be overlooked. This review helps us better understand the role of biochar in soil bioremediation and enables targeted selection and modification of biochar for desired outcomes in practical applications.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Xiaofei Tan, Yuanyuan Deng, Zihan Shu, Chen Zhang, Shujing Ye, Qiang Chen, Hailan Yang, Lei Yang
Summary: In this study, an environmentally friendly, low-cost, and efficient composite material for arsenic adsorption was prepared using industrial solid waste and phytoremediation plant waste, and its excellent removal capacity and regenerative properties were verified through experiments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yuanyuan Yang, Xiaofei Tan, Eydhah Almatrafi, Shujing Ye, Biao Song, Qiang Chen, Hailan Yang, Qianmin Fu, Yuanyuan Deng, Zhuotong Zeng, Guangming Zeng
Summary: This study successfully synthesized alfalfa biochar loaded with Mg/Fe layered double hydroxide (AF-LDH) for the removal of trace metal(loid)s from stormwater. The results showed that the composite material could efficiently remove multiple pollutants and can be reused. Fourier transform infrared spectra and X-ray diffraction analysis supported the reconstruction of the material structure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Engineering, Environmental
Binbin Shao, Leyuan Shen, Zhifeng Liu, Lin Tang, Xiaofei Tan, Dongbo Wang, Weimin Zeng, Ting Wu, Yuan Pan, Xiansheng Zhang, Lin Ge, Miao He
Summary: This review discusses the formation of disinfection byproducts (DBPs) from emerging organic micropollutants (EOMPs) during chlorine-based disinfection processes (Cl-DPs). The typical Cl-DPs and their mechanisms are introduced, and the formation pathways, mechanisms, and influencing factors of DBPs in the presence of different EOMPs are discussed. The review also summarizes and discusses the detection and control methods of DBPs, and proposes future research directions and challenges in controlling their formation during disinfection processes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Ling Xiang, Eydhah Almatrafi, Hailan Yang, Haoyang Ye, Fanzhi Qin, Huan Yi, Yukui Fu, Xiuqin Huo, Wu Xia, Hong Li, Ming Yan, Chengyun Zhou, Guangming Zeng, Xiaofei Tan
Summary: This study revealed that Fe(IV), 1O2, center dot O2, and IO3 center dot were identified as multiple active species in the magnetic ferrite-modified biochar (MFBC)/PI system. The MFBC/PI system exhibited stable degradation efficiency under wide pH ranges and the presence of various interfering anions. The contribution of iron leaching-precipitation equilibrium and redox equilibrium to the degradation efficiency of the PI/MFBC system was verified through a continuous cycle experiment. Moreover, the interaction between biochar and iron provided active site dispersion and fast electron transfer.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Computer Science, Artificial Intelligence
Xiuling Zhang, Xiaofei Tan, Zhaoci Luo, Jun Zhao
Summary: In recent years, there has been a new attempt to capture label co-occurrence in multi-label text classification using the sequence-to-sequence (Seq2Seq) model. However, existing approaches often overlook the semantic information in the labels themselves and the Seq2Seq model is influenced by the order of label sequences. Therefore, a novel Seq2Seq model with a different label semantic attention mechanism (S2S-LSAM) is proposed to generate fused information that combines label and text information. This model can effectively select the text features most relevant to the labels.
INTERNATIONAL JOURNAL OF MACHINE LEARNING AND CYBERNETICS
(2023)
Article
Engineering, Environmental
Hong Li, Rongliang Qiu, Yetao Tang, Xiaoguang Duan, Yanling Gu, Hailan Yang, Qiang Chen, Zihan Shu, Ling Xiang, Shaobo Liu, Xiaofei Tan
Summary: Fe(IV) formation and PS activation in biochar/PS systems under a wide range of pH conditions were investigated using Fe-BC250. It was found that Fe-BC250/PS system showed superior performance in contaminant removal under alkaline conditions due to the slow release of Fe2+ and the formation of Fe(IV). This study provides new insights into Fe(IV) formation mechanism and highlights the potential application of low-cost iron-carbon composites in water treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Hailan Yang, Rongliang Qiu, Yetao Tang, Shujing Ye, Shaohua Wu, Fanzhi Qin, Ling Xiang, Xiaofei Tan, Guangming Zeng, Ming Yan
Summary: Residual flotation reagents in mineral processing wastewater can pose severe ecological threats when discharged untreated. Metal-free biochar-induced persulfate-advanced oxidation processes (KCBC/PS) efficiently degrade aniline aerofloat (AAF) at low doses of catalyst and oxidant. The dominant reactive oxygen species in the KCBC/PS system is O-2(center dot-), which achieves deep mineralization of AAF. The electron transfer mechanism and active sites play important roles in the KCBC/PS system, allowing for wide pH adaptation and resistance to inorganic anions in real mining wastewater treatment. Carbonyl group is the active site for the non-radical pathway of biochar, while the conversion of SO4 center dot- to superoxide radicals represents a defect. The study also reveals a possible degradation pathway of AAF and its reduced environmental toxicity.
Article
Engineering, Environmental
Yanling Gu, Xiaofei Tan, Xiaoxi Cai, Shaoheng Liu
Summary: The study found that biochar effectively immobilized arsenic and cadmium in sediment, reducing their bioavailability and toxicity in the environment. Results also showed that biochar efficiently enriched microbial biodiversity and population in sediment, with water hyacinth biochar performing the best among all samples.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
