Article
Chemistry, Physical
Sabrina S. Alam, Carolina B. Mather, Youngwoo Seo, Yakov Lapitsky
Summary: PAH/TPP coacervates allow for multi-month release of small, water-soluble molecules, such as anionic and cationic surfactants. The properties and performance of the coacervates in encapsulating and releasing cationic surfactants depend on the mixing order, concentration, and binding strength.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Environmental Sciences
Chongqing Wang, Ruirui Sun, Rong Huang, Yijun Cao
Summary: This study enhances the catalytic efficiency of pyrite by pre-reaction with hydrogen peroxide to degrade recalcitrant contaminants. By optimizing factors such as pre-reaction time, hydrogen peroxide concentration, solution pH, and dye concentration, efficient degradation of contaminants using natural pyrite was achieved. Enhanced dye degradation was attributed to the production of hydroxyl radicals facilitated by self-regulation of pH, Fe2+ release, and Fe2+/Fe3+ cycle.
Article
Environmental Sciences
Iremsu Kayan, Nilgun Ayman Oz, Cetin Kantar
Summary: The aerobic biodegradation combined with pyrite-Fenton process was found effective in treating wastewater containing various chlorophenols by reducing toxicity and improving COD removal efficiency. The type of chlorophenol treated greatly influenced the biodegradation process, with highly chlorinated CPs such as 2,4,6-TCP showing the highest toxicity. Sludge acclimation and pyrite-Fenton pre-treatment enhanced the biomass tolerance to CP toxicity and improved sCOD removal efficiencies, showcasing the potential of this combined system for effective treatment of chlorophenol-containing wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Kaiyun He, Xinchun Guo, Guofeng Wang, Jiaping Xiong, Huiling Peng, Faying Lai, Jinbao He
Summary: This experiment investigated the use of natural pyrite as a catalyst for the electro-Fenton process to treat wastewater with high concentrations of chlorine salts from a pesticide factory. The results showed that using 3 g/L pyrite as catalyst, with graphite cathode and Ti/RuO2-IrO2-SnO2 anode, under optimized conditions, a high treatment efficiency was achieved after 3 hours of treatment. The electro-Fenton process catalyzed by natural pyrite exhibited good potential for efficiently treating pesticide processing plant wastewater with high contents of chlorine salts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Juan Li, Martha Dagnew, Madhumita B. Ray
Summary: This study investigates the effect of coagulation on microfibers from laundry processes and finds that the addition of polyaluminum chloride (PACl) can increase the removal efficiency. The study also observes surface changes of the microfibers during coagulation and identifies charge neutralization and adsorption-bridging as the dominant mechanisms.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Quanyuan Chen, Yuan Yao, Zheying Zhao, Juan Zhou, Zhao Chen
Summary: This study investigated the efficacy of pyrite catalyzed Fenton-like oxidation for tertiary treatment of dyeing wastewater and emphasized the importance of its long-term catalytic activity. The results showed that pyrite can effectively catalyze the oxidation of recalcitrant pollutants in suitable conditions, with its heterogeneous catalysis by Fe(II) on the surface being more significant than Homogeneous catalysis by dissolved iron ions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Viktoriia Klovak, Sergey Kulichenko, Serhii Lelyushok
Summary: The study investigates the influence of charge, hydrophobicity, and spatial characteristics on the analytical signal of cationic and anionic surfactants in their association with fluorescent reagents in aqueous solutions. The results show that the contribution of electrostatic interactions, hydrophobic matching, and spatial matching play a significant role in determining the surfactant analytical signal. The effects observed lead to the design of an analytical system for the determination of sodium dodecyl sulfate with a fluorescent reagent.
Article
Geochemistry & Geophysics
Xiang Gong, Suqi Li, Jiaqiao Yuan, Zhan Ding, Anmei Yu, Shuming Wen, Shaojun Bai
Summary: Efficient treatment of mineral-processing wastewater is a subject of great interest in recent times. This study aimed to degrade xanthate from flotation tailings wastewater using a pyrite-catalyzed Fenton system. The method achieved a sodium butyl xanthate (SBX) removal rate of over 96%, outperforming the H2O2 system by 12.85% under optimal conditions. Natural pyrite acted as a catalyst to enhance the oxidation capacity of H2O2, with hydroxyl radicals (center dot OH) identified as the main active species. The reaction mechanism proposed involves the adsorption of H2O2 onto pyrite surfaces, reaction with Fe2+, formation of center dot OH and Fe3+, and oxidation of SBX to smaller products.
Article
Engineering, Chemical
Pan Xia, Zehong Chen, Dazhi Wang, Xiaodong Niu, Xiaoyu Tang, Lixin Ao, Qiang He, Sha Wang, Zhihong Ye
Summary: Chloride ions have both positive and negative effects on the Fered-Fenton treatment of high salinity wastewater. On one hand, chloride ions contribute to the degradation of pollutants by generating active chlorine. On the other hand, chloride ions inhibit the production of hydroxyl radicals, leading to a decrease in their concentration. Therefore, the dominant role shifts from hydroxyl radicals to chlorite ions in the presence of chloride ions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Tim Kohlmann, Martin Goez
Summary: The study explored static and dynamic quenching of pyrene by methyl viologen in sodium alkyl sulfate micelles of varying volumes. The results showed that under high concentrations of NaCl, a significant portion of viologen resided in the aqueous phase and quenched dynamically across the micelle-water interface. The aggregation numbers of micelles were found to be linearly dependent on the alkyl chain length and the temperature compared to the Krafft temperature.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Hao Wang, Hongyou Yin, Zeng Zhang, Yan Wu, Chang Yi, Tingting Shen
Summary: gamma-Cu-2(OH)(3)Cl is a chloride-resistant catalyst that effectively mineralizes aromatic contaminants in high chloride solutions. Its ability to resist chloride interference is attributed to the formation of sigma-Cu-ligand complexes, improved self-redox property, and neutral pH conditions. This catalyst shows enhanced mineralization of phenol and acceleration of its degradation into small carboxylic acids in the presence of chloride.
APPLIED CATALYSIS A-GENERAL
(2022)
Review
Environmental Sciences
Mathurin Francois, Kuen-Song Lin, Nova Rachmadona, Kuan Shiong Khoo
Summary: The use of fossil fuels, GHG emissions, and waste are urgent problems for the environment and public health. Among various chemical activating agents, FeCl3 is the most cost-effective and environmentally friendly one to enhance AD and improve biomethane quality and quantity. FeCl3 can increase the BET surface area of biochar and effectively remove contaminants in wastewater and biogas. However, further research is needed to investigate its ability in removing water vapor and carbon dioxide during biogas production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Nayara de Melo Costa-Serge, Chan Li, Raquel Fernandes Pupo Nogueira, Serge Chiron
Summary: The study investigated the activation of PMS, PDS, and H2O2 by CuMgFe-B(OH)4 LDH for the degradation of selected antibiotics and bacterial disinfection in urban wastewater. Different behaviors were observed based on the oxidants used, with H2O2 being effective for disinfection but not antibiotics degradation. PDS showed limited disinfection capacity, while PMS activated with LDH exhibited superior performance in removing antibiotics and inactivating pathogens.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
C. Ozgur, K. Senel, B. Aykut-Senel, S. S. K. Bekaroglu
Summary: The discharge of wastewater from net washing is a major problem in the marine ecosystem due to its high organic and saline content. This study investigated the treatability of net washing wastewater using the Fenton process. The results showed that the dosage of H2O2 was the most effective parameter, and increasing the peroxide dose led to a higher COD removal rate.
GLOBAL NEST JOURNAL
(2023)
Article
Environmental Sciences
Shunda Lin, Guojun Lv, Zeinab Khalid, Xuguang Jiang, Jianhua Yan
Summary: This study used a calcium sulfate-Friedel's salt precipitation method to dechlorinate and desulfurize MSWI fly ash in the waterwashing solution. The experimental results showed that a high chloride removal rate and sulfide removal rate could be achieved in the optimized two-stage process.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Elmira Ramazanova, Seung Hwan Lee, Woojin Lee
Summary: The study reveals that Kazakhstan's soil is contaminated by heavy metals, with potential anthropogenic origins for lead and cadmium pollution. Some cities have hazardous levels of heavy metals, posing risks to residents' health. Urgent soil remediation is necessary for protecting citizens from heavy metal contamination.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Sungyoon Park, Minsoo Kim, Yejee Lim, Jimin Yu, Siyu Chen, Sang Woon Woo, Sunho Yoon, Sungjun Bae, Han S. Kim
Summary: This study examined the binding characteristics of REEs within coal ash and found that the majority of REEs are strongly bound in the residual fraction, requiring the use of strong acids for extraction. Additionally, it was discovered that a significant portion of REEs can be recovered from wastewaters produced during coal ash-derived zeolite synthesis.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Nurbek Nurlan, Ainash Akmanova, Shanawar Hamid, Woojin Lee
Summary: The presence of oxyanions in groundwater significantly affects the reactivity and selectivity of Cu-Pd-hematite bimetallic catalysts for NO3- reduction, making their successive application challenging.
Article
Engineering, Environmental
Yerdaulet Abuov, Gaini Serik, Woojin Lee
Summary: CO2-enhanced oil recovery (EOR) has lower greenhouse gas (GHG) emissions than conventional oil production methods. Kazakhstan and China have lower net GHG emissions from CO2-EOR compared to their average oil production, while other countries/regions such as Iraq, Saudi Arabia, and Kuwait, which can source CO2 from natural gas combined cycle power plants, have even lower emissions. The study also found that CO2-EOR can compete with current upstream projects in Kazakhstan by increasing oil production and reducing GHG emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yoogyeong Kim, Yeongkyun Son, Sungjun Bae, Tae-Hyun Kim, Yuhoon Hwang
Summary: In this study, magnesium/aluminum-layered double hydroxide (MgAl-LDH) and bentonite (BT) nanocomposites (LDH-BT) were prepared using different methods and their chromate adsorption performance was investigated. The results showed that the LDH-BT composites prepared by solid-phase hybridization exhibited high chromate removal efficiency, with a positive relationship between the LDH ratio and chromate removal efficiency. It was confirmed that LDH-BT is a practical nanocomposite for soil and groundwater remediation.
Article
Chemistry, Multidisciplinary
Nurbek Nurlan, Ainash Akmanova, Woojin Lee
Summary: This article summarizes the technology of using nanomaterials as catalysts to reduce bromate to harmless substances, analyzes the advantages and disadvantages of this technology, discusses the challenges facing the use of hydrogen for bromate reduction, and factors such as reduction efficiency, durability, and stability of the catalysts. In addition, an economic evaluation of bromate removal, safe hydrogen supply, storage, and transportation is provided.
Editorial Material
Chemistry, Multidisciplinary
Thorsten Schaefer, Woojin Lee, Gopala Krishna Darbha
Article
Chemistry, Physical
Akmaral Tleubergenova, Yerdaulet Abuov, Saniya Danenova, Nurgabyl Khoyashov, Amina Togay, Woojin Lee
Summary: Kazakhstan has been known as a significant exporter of fossil fuel energy, but with the global energy sector shifting to low-carbon solutions, new emerging energy technologies like hydrogen production require a diverse resource base. Thus, Kazakhstan must assess its resource availability to remain competitive in an evolving energy market.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Jueun Jung, Minhee Choi, Anil Kumar Reddy Police, Jungho Lee, Sungjun Bae
Summary: Investigated the efficiency of different chemical-based cations in removing total phosphorus (T-P) from wastewater, and found that Fe3+ showed the highest removal efficiency. Dissolving Fe3+ from Fe(III)-containing minerals proved to be an effective method for T-P removal through chemical precipitation.
Article
Environmental Sciences
Hasan Fareed, Kyunghoon Jang, Woojin Lee, In S. Kim, Seunghee Han
Summary: A novel tortuous brick-and-mortar structure utilizing intercalation of PVA on SGO membranes was specifically tailored for brine treatment by pervaporation, providing excessive resistance to silica scaling and organic fouling, as well as ultrafast water transport without compromising salt rejection.
Article
Multidisciplinary Sciences
Karina Turdiyeva, Woojin Lee
Summary: The study investigates heavy metals contamination, drinking water quality, and associated health risks from Central Asian Rivers (Syr-Darya, Nura, and Ili Rivers). The concentrations of Fe, Cd, Cr (VI), Hg, Mn, and As exceeded drinking water standards in at least one water body. The study highlights the urgent need for heavy metal removal, effective monitoring, and good quality drinking water supply to mitigate health risks.
Article
Environmental Sciences
Yingkar Bahetnur, Woojin Lee
Summary: The study reveals the high-level risks of cancer and noncancer diseases caused by the use of contaminated surface water in Central Asia households. It also provides a framework for evaluating water quality. Water scarcity, security, and deterioration have been serious environmental concerns in the region. The contamination of the Esil River, originating in Kazakhstan, was studied, and human health risk assessment of heavy metals (Cd, Pb, Cr(VI), and As) in 15 relevant surface water bodies was conducted.
Article
Green & Sustainable Science & Technology
Nurlan Seisenbayev, Miriam Absalyamova, Alisher Alibekov, Woojin Lee
Summary: This study investigated the reactive transport modeling of CO2 injection into the Kazakhstan reservoir to identify mineralogical and porosity changes due to geochemical reactions. The study found that reservoirs with a higher abundance of secondary carbonates may be better suited for long-term CO2 sequestration, and an increase in porosity favors higher CO2 storage capacity. On the other hand, a reduced surface area limits the formation of dawsonite, which is crucial for CO2 trapping.
Article
Engineering, Environmental
Ainash Akmanova, Seunghee Han, Woojin Lee
Summary: The study found that sucrose-modified nano-zero-valent iron showed high degradation rate and stability in treating doxycycline in water, indicating potential application in environmental remediation of pharmaceutical contaminants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Olga Lem, Sunho Yoon, Sungjun Bae, Woojin Lee
Summary: This study synthesized novel green nano-zerovalent iron (G-NZVI) using onion peel extract, demonstrating its high reductive capacity and excellent oxidation resistance. The G-NZVI showed complete removal of BrO3 under both aerobic and anaerobic conditions, outperforming other well-known reductants. These findings suggest that organic onion peel waste can be reused to synthesize highly reactive nanoparticles for water treatment.
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)