Article
Polymer Science
Shifan Wang, Yuan Liu, Aiwen Yang, Qi Zhu, Hua Sun, Po Sun, Bing Yao, Yunxiao Zang, Xihua Du, Liming Dong
Summary: This study successfully synthesized a magnetic xanthate-modified polyvinyl alcohol and chitosan composite (XMPC) for efficient removal and recovery of heavy metal ions from aqueous solutions. The XMPC exhibited good adsorption performance, with the ability to be reused and easily separated through magnetic attraction, making it a promising candidate for heavy metal removal in sewage treatment systems.
Article
Environmental Sciences
Yingya Wang, Hanbing Zhang, Muhammad Yaseen, Zhangfa Tong, Ninghua Chen, Huazhen Shi
Summary: Organic modification of magnetic alkaline Ca-bentonite resulted in the preparation of a film material with magnetic separation ability and enhanced removal performance for heavy metal cations. The modified material exhibited higher adsorption capacity for heavy metal ions and could be efficiently recycled with minimal decrease in adsorption capacity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Polymer Science
Nur Maisarah Mohamad Sarbani, Endar Hidayat, Kanako Naito, Yoshiharu Mitoma, Hiroyuki Harada
Summary: The aim of this research was to synthesize magnetite hydrogel beads (CMC-CS-Fe3O4) for the removal of chromium (VI) and lead (II) from water. The results showed that CMC-CS-Fe3O4 with a CMC:CS (3:1) ratio had the best adsorption capacity for Cr (VI) and Pb (II) at pH levels of 2 and 4, respectively. The maximum adsorption capacities were 3.5 mg/g for Cr (VI) and 18.26 mg/g for Pb (II) within 28 h at 30°C.
Article
Environmental Sciences
Thi-Thuy Luu, Van-Phuc Dinh, Quang-Hung Nguyen, Ngoc-Quyen Tran, Duy-Khoi Nguyen, Thien-Hoang Ho, Van-Dong Nguyen, Dong Xuan Tran, H. A. Tuan Kiet
Summary: In this study, red mud modified by chitosan (RM/CS) was found to be an effective adsorbent for removing Pb(II) from aqueous solution, with a significantly increased surface area and high maximum adsorptive capacity. The adsorption process was mainly controlled by intra-diffusion mechanisms, and the interaction between Pb(II) and carbonate groups on the material's surface played a primary role once adsorption equilibrium was reached. The results suggest that RM/CS has potential as a material for removing Pb(II) from aqueous solution.
Article
Engineering, Environmental
Suhaib S. Salih, Mohammed Kadhom, Muayad A. Shihab, Tushar K. Ghosh
Summary: In this study, pristine chitosan modified vermiculite was successfully prepared and applied for the simultaneous adsorption of Pb(II) and phenol in industrial wastewaters. The adsorbents showed high specific surface area and their adsorption performance was systematically investigated. The results indicated that the adsorption process of both pollutants followed the pseudo-second-order model and the maximum adsorption capacities were determined. Moreover, the adsorption of one contaminant was not affected by the other adsorbed one.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Shuang Liu, Ye Li, Jiashuai Yan, Yuzhi Zhou, Cong Liu, Yangyang Zuo, Dongxue Liu
Summary: Xanthate-modified cross-linked chitosan (chitosan-SH) was synthesized by hydrothermal method for the removal of ruthenium [Ru(III)] from aqueous solutions. The adsorption process by chitosan-SH was found to be fast, reaching equilibrium within 30 minutes with a removal percentage of 94.7% at pH 7.0. Parameters like pH, contact time, initial Ru(III) concentration, solution volume, and adsorbent concentration were investigated to understand their effects on adsorption capacity, showing potential application of chitosan-SH as an adsorbent for Ru(III) in wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Xiya Yang, Lingyuan Chen, Dong Ren, Shixing Wang, Zhaogang Ren
Summary: An O-hydroxyphenyl thiourea-modified chitosan (OTCS) with excellent Pb(II) adsorption performance and selectivity was prepared as an adsorbent. The structure and morphology of the adsorbent were characterized, and it was found that OTCS exhibited high adsorption capacity for Pb(II) and followed pseudo-second-order kinetics and Langmuir isotherm model. The results suggest that OTCS has great potential for application.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Environmental Sciences
Si Wan, Xiangyu Wang, Cuiyu Yuan, Bing Wang, Huanyu Chen, Kun Ouyang, Qiulai Xiang, Deng Zhou, Runhua Chen
Summary: Multi-group magnetic biochar (MMBC) was prepared by encapsulating rice husk biochar in magnetic nanoiron. The adsorption of Pb(II) on MMBC was investigated and characterized. The results showed that MMBC had a high efficiency for Pb(II) removal, reaching 90.85%. Kinetic analysis indicated that the adsorption process followed pseudo-second-order kinetics and the isotherm models of Langmuir, Temkin, and Dubinin-Radushkevich (D-R) provided good fits. The maximum saturated adsorption capacity was calculated to be 66.83 mg.g(-1) at 303 K +/- 1. The mechanism for Pb(II) adsorption involved electrostatic attraction, functional group complexation, and ion exchange. MMBC showed good regeneration performance, with a 65% removal rate after five cycles. Therefore, MMBC is a promising and cost-effective remediation agent for Pb(II) removal from wastewater.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2022)
Article
Chemistry, Multidisciplinary
Sukanta K. Mondal, Chenglin Wu, Felix C. Nwadire, Ali Rownaghi, Aditya Kumar, Yusuf Adewuyi, Monday U. Okoronkwo
Summary: Biopolymers and alkali-activated materials are effective adsorbents for heavy metal removal from aqueous solutions. This study prepared hybrid adsorbents from both materials and investigated the effect of chitosan dosage on the removal efficiency of Pb(II) and Zn(II). The adsorbents showed high removal efficiencies for both metals, with Zn(II) being more effectively adsorbed. The addition of chitosan had little impact on the overall efficiency, except for a decrease with 0.05% chitosan. The choice of alkaline activating solution also influenced the adsorption performance.
Article
Green & Sustainable Science & Technology
Ying Zhang, Jianhua Qu, Yihang Yuan, Haijiao Song, Yang Liu, Siqi Wang, Yue Tao, Yanhong Zhao, Zhuoran Li
Summary: Sulfide-modified magnetic hydrochar (MHC-S4) was synthesized and found to effectively adsorb Cd(II)/Pb(II) over a wide pH range and achieve fast uptake equilibrium. In single system, MHC-S4 showed excellent adsorption properties with maximum monolayer uptake of 62.49 and 149.33 mg/g for Cd(II) and Pb(II), respectively. However, the binding rate and uptake of metal ions in the binary system were inferior, and Pb(II) exhibited significant inhibition to Cd(II) adsorption onto MHC-S4. The results suggested that sulfide-modified magnetic hydrochar is a high-performance adsorbent for heavy metals removal.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biochemistry & Molecular Biology
Ping Sun, Wei Zhang, Binze Zou, Lincheng Zhou, Zhengfang Ye, Quanlin Zhao
Summary: A new type of magnetic composite adsorbent with good adsorption performance was successfully prepared, having a large adsorption capacity for heavy metal ions, wide pH applicability, good reuse, and rapid magnetic separation capabilities.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Environmental
Hang Yin, Qiuqiu Xiong, Miao Zhang, Bowen Wang, Fenge Zhang
Summary: In this study, magnetic composite microspheres (SCFP) were successfully prepared and used for the removal of Cu(II) from water. Batch experiments revealed that SCFP exhibited excellent adsorption capacity with a removal rate of 97.1% for Cu(II). Comprehensive analysis of the structure and adsorption mechanism of SCFP provided insights into its superior performance. These findings suggest the potential of SCFP for the removal of Cu(II) from water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Applied
Siu Hua Chang
Summary: This paper provides an overview of Au(III) recovery from aqueous solutions using raw and modified chitosan, focusing on their synthesis, characteristics, modifications, sorption properties, and comparison between the two. The challenges and future prospects of using modified chitosan in large-scale applications for Au(III) recovery from aqueous solutions are also addressed.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Nuohan Xu, Mei Li, Kaixun Tian, Pei Liang, Yinyue Zhou
Summary: A magnetic mesoporous adsorbent carbon modified with iminodiacetic acid (Fe3O4@mC-IDA) was successfully synthesized and demonstrated high efficiency in removing Pb(II). The adsorbent showed a fast adsorption speed, easy separation ability, and fine reusability. The adsorption mechanism was found to involve the formation of tridentate chelates and electrostatic attraction between the adsorbent and Pb(II).
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Zhao Yang, Zhongwei Zhao, Xuan Yang, Zongli Ren
Summary: The study prepared x-mAC functionalized magnetic activated carbon material for the removal of cationic dyes and tetracycline hydrochloride from aqueous solutions, achieving good removal efficiency. The material shows potential application prospects in the field of wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Environmental Sciences
Linlin Ma, Nan Chen, Chuanping Feng, Miao Li, Yu Gao, Yutian Hu
Article
Chemistry, Physical
Jibo Qin, Weihua Cui, Chuanping Feng, Chuanglei Fan, Yang Deng, Yu Gao, Nan Chen
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Nanoscience & Nanotechnology
Dan Wang, Xinfeng Xiao, Bo Han, Weiming Ni, Yu Gao, Lin Li, Jianliang Xue
Article
Energy & Fuels
Jin Gao, Jie Ming, Meng Xu, Xinge Fu, Liang-Feng Duan, Cong-Chao Xu, Yu Gao, Jian-Liang Xue, Xin-Feng Xiao
Summary: In the past 50 years, marine oil spills have caused serious environmental pollution globally. This study isolated 12 petroleum-degrading strains from the seawater in Jiaozhou Bay, China, with strain MJ4 showing the highest diesel-degrading rate. Single-factor experiments and response surface methodology were used to optimize the environmental factors affecting the diesel oil degradation process of Bacillus sp. MJ4.
Article
Biotechnology & Applied Microbiology
Lin Li, Xiufang Shang, Xiaojie Sun, Xinfeng Xiao, Jianliang Xue, Yu Gao, Hongge Gao
Summary: The gram-negative bacterial strain Stenotrophomonas acidaminiphila 4-1 was isolated for its ability to resist hexavalent chromium and showed promising potential for chromium removal. Results indicated a removal rate of 75.69% for Cr(VI) with an initial substrate concentration of 15 mg L-1.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Xue Jianliang, Li Nana, Xiao Xinfeng, Bai Yu, Gao Yu, Wang Kunhua, Hu Xiangming, Cheng Dongle, Jiang Qing
Summary: The study presents a simple yet effective method to modify the wettability of Enteromorpha from hydrophilic to hydrophobic, achieving efficient oil adsorption and oil-water separation. By grafting n-octyltriethoxysilane on the surface of Enteromorpha, the modified material exhibits excellent adsorption capacities and oil-water separation performance. Under optimized conditions, the maximum adsorption capacity is 11.4 g/g with a contact angle of 137 degrees.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Zhengyuan Feng, Chuanping Feng, Nan Chen, Wang Lu, Shizhong Wang
Summary: This study proposed a new strategy for synthesizing a composite hydrogel, which possesses good reusability, rapid adsorption kinetics, cost-effectiveness, and high adsorption capacity. The experimental results demonstrated that the MBC/CMC/PAA composite hydrogel exhibited stable removal efficiency for Cu2+ and Pb2+ and had a higher allowable compression force. Additionally, this research developed a new method for preparing adsorbents and verified their applicability for the removal of Cu2+ and Pb2+ in real solutions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Chaorui Zhao, Nan Chen, Tong Liu, Chuanping Feng
Summary: Excessive sulfate levels are harmful to the environment and human health. This study aimed to find readily available organics for sulfate-reducing bacteria (SRB) in order to tackle sulfate pollution and develop sulfate removal and sulfur recovery methods. The research explored the utilization of different carbon sources by SRB, including alcohols, small organic acids, and sugars, and their impact on microbial sulfate reduction. The results showed that the conversion pathways of carbon sources and the presence of incomplete oxidizers significantly influenced the sulfate reduction process, as well as shaping the microbial community.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Zhengyuan Feng, Chuanping Feng, Nan Chen, Shizhong Wang
Summary: In this study, a novel magnetic hydrogel PAA/CMS/Fe3S4 was prepared for the adsorption of Pb and Cu from water. Fe3S4 was added as a magnetic factor to the hydrogel, which not only prevented its oxidation but also enhanced the adsorption capacity. The hydrogel exhibited stability in the pH range of 3.0 to 6.0 and followed pseudo-second-order and Langmuir-Freundlich models during the adsorption process. Functional groups in PAA/CMS/Fe3S4 were identified through FTIR and XPS, indicating complexation with Pb and Cu. XRD results suggested the formation of PbS and CuS due to the presence of Fe3S4. Density-functional theory analysis revealed a stronger interaction between Pb and Fe3S4 compared to Cu and Fe3S4. Overall, PAA/CMS/Fe3S4 magnetic hydrogel shows promise as an effective adsorbent for Pb and Cu removal, and this work provides a new approach for the application of Fe3S4 in magnetic adsorbents.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Environmental
Haishuang Wang, Nan Chen, Chuanping Feng, Yang Deng, Wang Lu
Summary: In this study, it was found that microorganisms may be the driving force to distinguish vanadium release and reduction processes in a complex contaminated system with a liquid carbon source. Experiments were conducted to observe the variation of nitrate and V(v) under anaerobic conditions with different liquid carbon sources. The results showed that certain microbial genera were associated with the release and reduction of V(v), providing a potential bioremediation strategy for nitrate and V(v) co-contaminated environments.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Energy & Fuels
Xin-Ge Fu, Ke Shi, Jian-Liang Xue, Chuan Chen, Yu Bai, Yan-Lu Qiao, Yi-Xuan Liu, Xiang-Ming Hu, Yu Gao, Hao Yu
Summary: This study investigated the adsorption process of petroleum hydrocarbon by immobilised petroleum-degradation bacteria, showing that the bacteria have many holes for adsorption. The adsorption of diesel is found to be a spontaneous, entropy-increasing, and endothermic process. Diesel is first adsorbed through hydrogen bonding on the surface of immobilised petroleum-degradation bacteria before being biodegraded, providing valuable knowledge for controlling petroleum hydrocarbon pollution through immobilisation technology.
Article
Chemistry, Multidisciplinary
Weiming Ni, Xinfeng Xiao, Yanjun Li, Lin Li, Jianliang Xue, Yu Gao, Fei Ling
Summary: The DETA impregnated modified attapulgite hybrid ZIF-8 composite was developed for adsorbing aspirin and ibuprofen in aqueous solution, showing high adsorption capacity and reusability. The research results indicate great potential for the composite material to adsorb NSAIDs effectively.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xuezhi Wang, Weihua Cui, Weiwu Hu, Chuanping Feng
Article
Engineering, Environmental
Chen Yang, Chuanping Feng, Nan Chen, Yang Deng, Weiwu Hu, Lijing Xue
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Tong Liu, Nan Chen, Yang Deng, Fangxin Chen, Chuanping Feng
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
