Article
Environmental Sciences
Yajun Cai, Zhonglyu Ran, Yan Cang, Xu Chen, Muhammad Shaaban, Qi-An Peng
Summary: The study investigated the mechanism of Cr(VI) and As(V) removal by Typha biochar (FBC) with magnetic iron oxide. The results showed that the modified FBC has a high potential for eliminating Cr and As through exchange and reduction processes. The single molecule uptake capacities for Cr(VI) and As(V) were 32.82 and 21.56 mg g-1, respectively. The adsorption process is spontaneous heat absorption, and the adsorption results are consistent with the proposed secondary kinetic model. FBC also exhibited good recyclability with >60% removal efficiency in the second and third reuse of Cr(VI).
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Analytical
Auwal M. Musa, Janice Kiely, Richard Luxton, Kevin C. Honeychurch
Summary: A screen-printed electrode modified with gold-nanoparticle-decorated reduced graphene oxide-carbon nanotubes (rGO-AuNPs/CNT/SPE) was used for the determination of estradiol (E2) in this study. The eco-friendly production of AuNPs using plant extract eliminated the need for severe chemicals and sophisticated fabrication methods. The rGO-AuNPs/CNT/SPE exhibited improved electrochemical performance compared to bare SPE and GO-CNT/SPE, as shown by the relative peak currents. The optimized estradiol sensor showed linear sensitivity from 0.05-1.00 μM with a detection limit of 3 nM and yielded stable and reproducible outcomes.
Article
Environmental Sciences
Md Sazadul Hasan, Mengistu Geza, Jacob B. Petersen, Venkataramana Gadhamshetty
Summary: This study investigated the use of biochar as a filtration media to remove graphene oxide contaminants from aquatic environments, with modified biochar showing enhanced removal efficiency. The results demonstrated that both BC and BC-nZVI had good retention effects on GO, especially at lower ionic strength.
Review
Biotechnology & Applied Microbiology
Qingshuang Zhao, Ting Xu, Xueping Song, Shuangxi Nie, Sun-Eun Choi, Chuanling Si
Summary: This paper reviews the preparation of magnetic biochar and its application in wastewater treatment, emphasizing the effectiveness of magnetic biochar in adsorbing pollutants and its advantages in solving water treatment challenges.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Environmental Sciences
Jing Li, Yalin Wu, Huahua Bai, Xiangli Wen, Qingxiang Zhou, Yongyong Yuan, Yongli Liu, Chunmao Chen, Libing Guo
Summary: The study demonstrated that the optimized magnetic reduced graphene oxide (MrGO) has high adsorption capacity for alkylphenols, with a heterogeneous multi-layer physical adsorption process. The adsorption interactions between MrGO and alkylphenols were mainly pi-pi, hydrogen-bond, and hydrophobic interactions, with different affinities towards different targets. The stability and recyclability of MrGO make it a promising and cost-effective option for remediation.
Article
Biochemistry & Molecular Biology
Wei Guo, Junhui Yue, Qian Zhao, Li Zhang, Shaoyong Lu
Summary: This study evaluated the feasibility of using biochar derived from corn straw and dewatered sludge to remove 17-beta-estradiol from aqueous solutions. The results showed that corn straw biochar had higher adsorption capacity and was influenced by pH levels, while the ionic strength had no significant effect. The possible adsorption mechanisms were suggested as pi-pi interactions, H-bonding, and micropore filling.
Article
Chemistry, Inorganic & Nuclear
Ying Cheng, Shuyi Yang, E. Tao
Summary: The study focuses on the synthesis of magnetic graphene oxide composite to effectively adsorb chromium in wastewater, with up to 90% of Cr3+ being adsorbed within 140 minutes. The removal of chromium is mainly through chemical adsorption, and the external magnetic field enables the efficient recovery of the adsorbents.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Xinyu Zhang, Hai Nguyen Tran, Yena Liu, Chao Yang, Tingwei Zhang, Jiaqi Guo, Wenyuan Zhu, Mehraj Ahmad, Huining Xiao, Junlong Song
Summary: In this study, a facile one-pot approach was developed for the synthesis of magnetic self-nitrogen-doped biochar using K3[Fe(C2O4)3] as an activator and iron supplier. The magnetic self-nitrogen-doped biochar exhibited a large specific surface area and excellent adsorption capacities for Congo red and Rhodamine B.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Chaoke Bulin, Rongxiang Zheng, Jinling Song, Jinxiao Bao, Guoxiang Xin, Bangwen Zhang
Summary: Researchers have successfully prepared a magnetic graphene oxide-chitosan nanohybrid and applied it in wastewater remediation. The interaction mechanism between the nanohybrid and Hg(Pi) was investigated through spectroscopic analysis and adsorption fitting. The nanohybrid showed efficient adsorption of Hg(Pi) and NO3-, suggesting its potential as an effective adsorbent.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Zahra Niavarani, Daniel Breite, Andrea Prager, Isabell Thomas, Mathias Kuehnert, Bernd Abel, Roger Glaeser, Agnes Schulze
Summary: Composite microfiltration polyethersulfone membranes with molecularly imprinted particles (MIPs) were developed for efficient and selective adsorption of 17β-estradiol from water. The membranes exhibited significant adsorption loading and high selectivity for 17β-estradiol, even in the presence of other micropollutants. The membranes also showed excellent reusability and a maximum adsorption capacity more than 200 times higher than commercial nanofiltration.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Biochemistry & Molecular Biology
Yujia Yang, Rui Shan, Yaoxin Xiao, Fengxiao Zhao, Haoran Yuan, Yong Chen
Summary: CeO2-doped magnetic coconut coir biochar (Ce-MCB) was prepared as an efficient adsorbent for Pb2+ absorption. The enhanced absorption capacity was attributed to the increase in oxygen-containing functional groups and mineral precipitation. Ce-MCB showed a maximum theoretical adsorption capacity of 140.83 mg/g and sustained absorption above 70% after four cycles, indicating its potential in wastewater treatment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Environmental
Fengsong Zhang, Zhuo Wei, Jim J. Wang
Summary: Inadequate handling of poultry manure can lead to significant environmental pollution. Composting poultry manure with corn stalks, mushroom residues, and rice husk biochar can effectively degrade estrogen, stabilize heavy metals, and reduce ammonia emissions. Biochar shows a promotional effect on microbial degradation of estrogen, indicating its potential in improving environmental quality during composting.
Article
Materials Science, Multidisciplinary
Hongwei Sun, Jingjie Yang, Yue Wang, Yucan Liu, Chenjian Cai, Afshin Davarpanah
Summary: The study found that magnetic Fe3O4 biochar had the highest efficiency in removing tetracycline, with adsorption effectiveness influenced by material ratio and acidic conditions. The adsorption process mainly involved chemical adsorption and physical adsorption, with differences in adsorption mechanisms among the materials. The magnetic biochar maintained a certain adsorption capacity after five cycles.
Article
Biochemical Research Methods
Jun-Seong Ahn, Chang-Hyun Jang
Summary: An LC-based aptasensor has been developed to detect 17 beta-estradiol (E2) at picomolar levels by utilizing competitive reactions and interfacial events. The aptasensor changes the optical response of liquid crystals (LCs) through electrostatic interactions with a cationic surfactant (CTAB) and the aptamer. The conformational change of the aptamer due to binding with E2 weakens the electrostatic attraction, resulting in a dark optical image. The E2 sensor showed a detection limit of 3.1 pM in TBS and 6.8 pM in human urine, demonstrating high sensitivity and selectivity without the need for complex analysis equipment.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Agriculture, Dairy & Animal Science
Jasmine Fusi, Maria Cristina Veronesi, Alberto Prandi, Monica Probo, Massimo Faustini, Tanja Peric
Summary: This study investigated the changes in sexual hormones in dogs during puberty using hair and nail samples to analyze the concentrations of testosterone (T), 17 beta-estradiol (E2), and progesterone (P4). Traditional methods using blood samples are not suitable for long-term studies, but hair and nails have been identified as suitable retrospective biological specimens. The results showed significant increases in T levels in male dogs and E2 levels at puberty and P4 levels after puberty in female dogs. Hair and nail T and nail P4 concentrations could differentiate between male and female dogs at specific sampling times. This study demonstrates the usefulness of hair and nails as biological specimens for studying the changes in T, E2, and P4 during the peripubertal period in dogs.
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)
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
Chemistry, Multidisciplinary
Xinjiang Hu, Daixi Zhou, Hui Wang, Wenlong Zhang, Haoxiang Zhong, Yongsheng Chen
Summary: Single atom catalysts (SACs) based on M1-Nx-Cy have emerged as a frontier research field in catalysis, offering high reactivity, maximum atomic utilization, and high selectivity. This review summarizes the fabrication methods of M1-Nx-Cy based SACs via support anchoring and coordination design strategies, characterizes single metal atoms, and discusses their environmental applications. The potential of M1-Nx-Cy based SACs to address current and future environmental pollution problems is emphasized.
CHINESE CHEMICAL LETTERS
(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
Yuanhao Ouyang, Honghui Jiang, Haoxiang Zhong, Guoyu Li, Xiaodong Ji, Qi Jin, Wei Xue, Xinjiang Hu, Mingshan Zhu
Summary: This study developed a g-C3N4 with N2C-type defects/MoO3 Z-scheme photocatalyst (D-CN/MoO3) for the degradation of microcystin (MC-LR) in visible light. The D-CN/MoO3 could photodegrade 100% of MC-LR within 25 min, which was significantly higher than pure g-C3N4. The degradation mechanism was found to be the selective attack of 1O2 on the Adda side chain of MC-LR and subsequent decarboxylation reaction of h+, leading to effective mineralization and reduced toxicity of MC-LR. The D-CN/MoO3 also demonstrated excellent stability and adaptability, showing potential for decontamination of MC-LR in eutrophic water.
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.
Review
Engineering, Environmental
Qianzhen Fang, Hailan Yang, Shujing Ye, Peng Zhang, Mingyang Dai, Xinjiang Hu, Yanling Gu, Xiaofei Tan
Summary: This review comprehensively discusses the generation pathways and identification methods of singlet oxygen (1O2) in catalysts/PMS systems. The generation pathways are summarized based on the inclusion of metal element in catalysts, while the influence of metal valence states and geometric structures on 1O2 generation is thoroughly discussed. Identification methods include EPR, quenching experiments, reaction in D2O solution, and chemical probe tests. Several perspectives for further studies on 1O2 in catalysts/PMS systems are proposed.
Article
Engineering, Environmental
Chenxi Huang, Meifang Li, Ping Wang, Shiyu Song, Beixia Chai, Meijuan Zhang, Xinjiang Hu, Jingju Cai, Shaohua Wu, Qingyun He
Summary: A novel nitrogen-doped magnetic graphene oxide confined Fe-Co dual single-atom catalyst was prepared by one-step molten salt assisted high-temperature pyrolysis. The catalyst showed significant removal efficiency for tetracycline and exhibited good separation and catalytic performance. The effects of key parameters on the degradation of tetracycline were investigated, and the catalytic potential in actual water and regeneration performance of the material were evaluated.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Qizhuo Liu, Xiaodong Ji, Jiaqin Deng, Honghui Jiang, Guoyu Li, Yuanhao Ouyang, Xin Li, Chunfang Tang, Xiaofei Tan, Xinjiang Hu
Summary: In this study, a high photocatalytic activity porous carbon nitride nanosheet was prepared using a simple pyrolysis technique. The nanosheet has a larger specific surface area and higher charge mobility, resulting in enhanced degradation efficiency of microcystin.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jiaqin Deng, Ying Fang, Changlan Hou, Yanru Zhang, Meifang Li, Jianing Han, Wanxuan Du, Chunfang Tang, Xinjiang Hu
Summary: This study investigates the regeneration of spent biochar adsorbent and the degradation of adsorbed PFOA using ultrasonic assisted activation of persulfate. The results demonstrate that PFOA can be efficiently degraded by the synergistic effect of ultrasound and persulfate.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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)
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)
