Article
Environmental Sciences
Yingqun Ma, Chenchen Yang, Yao Shi, Zhichao Liu, Wei Cao, Quan Wen, Yanwen Qin
Summary: Experiments were conducted to simultaneously eliminate and detoxify microgram levels of As(III) in natural water containing micromolar levels of H2O2 and Fe(II). The results showed that the molar ratio of oxidant to As(III) played an important role in the oxidation of As(III). Increasing the concentration of the oxidants did not result in complete As(III) oxidation. However, when H2O2 and Fe(II) coexisted in the reaction system, As(III) was completely oxidized and eliminated. The research also showed that H2O2 and Fe(II) at natural levels can significantly influence arsenic mobilization in natural water, providing an environmentally friendly choice for the elimination and detoxification of microgram levels of As(III) in drinking water.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Engineering, Environmental
Shangding Yang, Liuyang He, Pai Peng, Yanli Liu, Yongfei Ma, Li Wu, Zulin Zhang, Lie Yang
Summary: The study investigated the degradation of thiacloprid (TCP) using a Fe2+/UV/peroxydisulfate (PDS) system. Under optimized conditions, the system achieved a degradation efficiency of 97.5% for TCP with low toxicity intermediates. Therefore, the Fe2+/UV/PDS system shows promise as an effective and environmentally friendly method for TCP removal from wastewater.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Materials Science, Multidisciplinary
Man-Man Chen, Zuju Ma, Bing-Xuan Li, Wen-Bo Wei, Xin-Tao Wu, Hua Lin, Qi-Long Zhu
Summary: This study identified non-centrosymmetric arsenates as a new source of IR NLO materials with unique zero-dimensional structures and key NLO parameters, showing wide phase-matching ranges, significant second-harmonic generation efficiency, and large laser-induced damage thresholds. Theoretical studies highlighted the critical role of discrete As-based coordination polyhedra in the linear optical and NLO responses of these compounds.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Construction & Building Technology
Yuan Wang, Zhi Wang, Linbo Jiang, Yixuan Sun, Bin Tan, Jinghang Niu
Summary: Ferrous sulfate can adjust the setting time of cement paste and enhance its compressive strength. It also reduces the content of portlandite in hydration products, thereby lowering the leaching amount of chromium (VI). The replacement of gypsum by ferrous sulfate further immobilizes chromium (VI) and reduces its leaching.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Environmental
Yanni Xi, Tanghuan Xie, Yanfen Liu, Yangtao Wu, Huinian Liu, Zhu Su, Yicai Huang, Xingzhong Yuan, Chang Zhang, Xin Li
Summary: The composite material CMC-FeS@EPS was developed for the removal of Cr(VI) from water, showing higher efficiency compared to traditional materials, with good performance in a wide range of pH values and in the presence of other ions. FTIR and XPS analysis demonstrated that EPS functional groups accelerated the adsorption and precipitation process, while electrochemical results showed faster electron transfer to Cr(VI) in CMC-FeS@EPS compared to CMC-FeS.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Ivan Celio Andrade Ribeiro, Isabela Cristina Filardi Vasques, Jessica Cristina Teodoro, Marcelo Braga Bueno Guerra, Jefferson Santana da Silva Carneiro, Leonidas Carrijo Azevedo Melo, Luiz Roberto Guimaraes Guilherme
Summary: This study developed a novel low-cost chemical compound named hydroxyl-eggshell (ES-OH) for arsenic removal from aqueous solutions, providing a local and environmentally-friendly way of recycling eggshells. The adsorption mechanism of ES-OH on arsenic was found to be vladimirite precipitation followed by weak electrostatic interactions, showing promising potential for application in egg-processing industries.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Robert Stanton, Emma Russell, Hayden Brandt, Dhara J. Trivedi
Summary: The effective capture of common water contaminants using metal-organic frameworks (MOFs) presents a remedy for current environmental concerns arising from the pollution of water sources. The interactions between the anions and the MOF largely determine the efficiency of capture. Different MOFs exhibit distinct host-guest interactions, with the importance of utilizing different binding modes highlighted for strong interactions and efficient uptake of anions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Environmental Sciences
Eric F. Zama, Gang Li, Yu-Ting Tang, Brian J. Reid, Ngwa M. Ngwabie, Guo-Xin Sun
Summary: This study demonstrated that unmodified biochar can effectively enhance the removal of As(III) through calcium-arsenic precipitation, with the best results achieved at pH 6.5.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Yancheng Ma, Shaojun Jiang, Jie Zhong, Xukai Chen, Yuehong Shu
Summary: In this study, a novel monolithic composite material, PSA-nFeS, was successfully synthesized for efficient removal of Cr(VI) pollution in water, demonstrating high removal efficiency and a new removal mechanism.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Dong Chen, Xiaohu Du, Kunyuan Chen, Guangrong Liu, Xin Jin, Chuanfu Song, Feidei He, Qiang Huang
Summary: FeS nanoparticles loaded on nitrogen-doped biochar were successfully prepared by pyrolyzing coffee husks treated with Mohr's salt. The FeS/NBC composite exhibited a synergistic scavenging effect of Cr(VI) and showed promising potential for chromium pollution remediation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Mohd Hushni Mohd Yusof, Shamsul Sarip, Abdul Yasser Abd Fatah, Hazilah Mad Kaidi, Firdaus Muhammad-Sukki, Nor Fazilah Mohd Hashim
Summary: Access to safe drinking water is essential for human health. This study explores the potential of the in-situ stannous reagent generator (SRG) as a disruptive green technology for Cr (VI) treatment. The SRG technology efficiently and safely reduces Cr (VI) levels in drinking water, reducing health risks and chemical handling risks.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Yumeng Wang, Jiaxi Zhang, Shaofeng Wang, Xiangfeng Zeng, Xin Wang, Peiwen Zhang, Yu Song, Danni Zhang, Yongfeng Jia
Summary: This study proposed an in-situ method for stabilizing hazardous calcium arsenic residues (CARs) by introducing small amounts of ferrous (FeII) solution to induce the formation of stable ferrous arsenate minerals. The results showed that the addition of FeII significantly inhibited the dissolution of arsenic (As) in the CARs slurries. Characterization revealed the formation of stable ferrous arsenate minerals, parasymplesite and/or ferrisymplesite, as the mechanism of the stabilization effects. This FeII treatment method provides an alternative option for in-situ CARs stabilization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
I Gedeike, K. Baltakys, A. Eisinas
Summary: This study investigated the influence of Cr3+ ions on the formation of calcium silicate hydrates and the thermal stability of the synthesized compounds in the CaO-SiO2 center dot nH(2)O-H2O system. The results showed that Cr3+ ions participated in the formation of calcium silicate hydrates and influenced the sequence of the formed compounds during hydrothermal synthesis. The oxidation state of chromium changed during calcination, and calcium chromate was formed. The findings of this study are important for understanding the formation and thermal stability of calcium silicate hydrates.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Environmental Sciences
Ruoling Ni, Xianxian Chu, Ran Liu, Jinlin Shan, Yimei Tian, Weigao Zhao
Summary: This study investigated the immobilization and release of chromium by pipe scales and discovered the characteristics of different types of scales. Results showed that block pipe scales and lumpy pipe scales exhibited similar trends, but block pipe scales had the highest potential for chromium release, indicating a high risk. The study also identified turning points in the release process associated with anions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Chemistry, Physical
Xiong Peng, Shujun Liu, Zhijia Luo, Xiwen Yu, Wanwen Liang
Summary: In this study, a novel nitrogen and sulfur functionalized 3D macroporous cellulose material (MPS) was successfully prepared and showed high removal efficiency and selectivity towards Cr(VI) in wastewater treatment. The presence of MoS42- in MPS contributed significantly to the selectivity. The results provide a new idea for the design of adsorbents with superior selectivity for removing Cr(VI).
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)