Article
Environmental Sciences
Shumin Zhu, Zaochen Tian, Pin Wang, Weiqiu Zhang, Lingjun Bu, Yangtao Wu, Bingzhi Dong, Shiqing Zhou
Summary: Quantitative insight into HCO3--dependent degradation kinetics is essential for understanding UV processes. A kinetic model was developed to predict kinetics in UV/H2O2 and UV/chlorine processes. The presence of bicarbonate (HCO3-) impacts CBZ degradation and radical chemistry in UV processes, with HCO3- inhibiting CBZ degradation to different degrees. HO center dot and CO3-center dot make comparable contributions to CBZ degradation in UV/H2O2 process in the presence of HCO3-, while ClO center dot is the main contributor at various HCO3- concentrations. Overall, HCO3- and CO3-center dot have a higher impact on the reactions and mechanism of UV/H2O2 processes.
Article
Environmental Sciences
Mingxue Li, Zexiu An, Yanru Huo, Jinchan Jiang, Yuxin Zhou, Haijie Cao, Maoxia He
Summary: This study investigated the reaction mechanisms between brominated contaminants and different oxidants in chlorine-based AOPs and simulated their degradation kinetics under different conditions. The results showed that hydrogen peroxide, chlorine, and chloramine were effective oxidants for removing brominated contaminants.
Article
Environmental Sciences
A. Cibati, R. Gonzalez-Olmos, S. Rodriguez-Mozaz, G. Buttiglieri
Summary: The study found that the complexity of wastewater matrices negatively impacted the efficiency of UV/H2O2 treatment, with urban WWTPs effluents and greywater showing the highest pharmaceutical removal rates, while effluents from hospitals and industries had lower removal rates. The treated wastewater generally showed reduced toxicity, except for industrial wastewater. In terms of removal rates for photo-susceptible, moderately photo-susceptible, and most photo-resistant compounds, urban WWTP effluents and greywater performed the best.
Article
Environmental Sciences
Ying Cao, Jun Yao, Tatjana Solevic Knudsen, Wancheng Pang, Junjie Zhu, Bang Liu, Hao Li, Miaomiao Li, Jianchao Su
Summary: UV/chlorine showed higher BPA degradation efficiency and pH-dependency than UV/H2O2 due to chlorination and the synergy of center dot OH and RCS. The primary radicals, center dot OH and Cl center dot, played a pivotal role in BPA degradation in UV/chlorine process at all pH investigated. Chlorination, hydroxylation, and breakage of the isopropylidene chain were the decomposition pathways in the UV/chlorine system, while only hydroxylation and breakage of the isopropylidene chain occurred in the UV/H2O2 system. Toxicity analysis revealed that the UV/chlorine system produced a mixture with higher toxicity compared to the UV/H2O2 system. Careful consideration of the possible environmental risk is required when using UV/chlorine to remove BPA in real waters.
Article
Chemistry, Physical
M. S. Mansour, Yousra Farid, S. A. Nosier, Ola Adli, M. H. Abdel-Aziz
Summary: This study investigates the feasibility of using photochemical advanced oxidation as a viable technique to address the ecological issue of persistent organic contaminants. UV/H2O2 and photoelectro-Fenton processes were utilized for the degradation of Eosin Yellow in solution. Various operational variables were examined for both methods to optimize the degradation efficiency.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Environmental Sciences
Guo-Qiang Li, Zheng-Yang Huo, Qian-Yuan Wu, Zhuo Chen, Yin-Hu Wu, Yun Lu, Hong-Ying Hu
Summary: Recently, UV-LEDs and chlorine combined system has been used as an emerging advanced oxidation process, with investigations on the quantum yields of chlorine photolysis using polychromatic UV sources. Different trends in radical species productions were observed in 265 nm and 280 nm LED UV/chlorine systems as pH varied from 5.0 to 10.0.
Article
Engineering, Environmental
Shanshan Zheng, He Ji, Wenlei Qin, Chunyan Chen, Zihao Wu, Kaiheng Guo, Wenrui Wei, Wanqian Guo, Jingyun Fang
Summary: This study investigated the mechanism of UV photolysis of ClO2- and the production of reactive species. It was found that UV photolysis primarily transforms ClO2- to ClO2 and then to HOCl/OCl-, ClO3-, and Cl-. Both ClO2 and HOCl/OCl- are major reactive chlorine species. Additionally, hydroxyl radical (HO·) and chlorine atom (Cl·) are also formed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Woorim Lee, Sandro Marcotullio, Hoonsik Yeom, Heejong Son, Tae-Hun Kim, Yunho Lee
Summary: This study investigated the reaction kinetics and degradation efficiency of methylparaben and its halogenated products (Cl-, Br-, Cl,Cl-, Br,Cl-, and Br,Br-methylparabens) during ozonation and UV 254 /H2O2 treatment. The results showed that ozonation and UV/H2O2 were effective in controlling the presence of methylparaben and its halogenated products.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Xin Lei, Yu Lei, Shuangshuang Cheng, Xin Yang
Summary: This study investigated the reaction kinetics between chlorine radicals and N-nitrosamines, and found a positive correlation between the number of methylene groups and the reaction rate of chlorine radicals. The UV/chlorine advanced oxidation process slightly increased the degradation of N-nitrosamines compared to UV irradiation alone, and chloride ions did not inhibit their removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Jie Wang, Lijing Pang, Yue Gao, Kangying Guo, Qinyan Yue, Xing Xu, Baoyu Gao
Summary: The study investigates the effect of wavelength on the removal of hexazinone using ultraviolet light-emitting diode (UV-LED) in combination with H2O2. It is found that the highest degradation efficiency of hexazinone is achieved at a wavelength of 265 nm in the UV-LED/H2O2 process, with the lowest energy consumption. Dual-wavelength UV-LED irradiation (265 and 280 nm) accelerates the photolysis of H2O2 and increases the efficiency of pollutant degradation. The UV-LED/H2O2 process demonstrates high degradation efficiency and energy savings in various pH environments, except under strongly alkaline conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Diya Wen, Daoyi Chen, Yuelu Jiang
Summary: Unwanted proliferation and adhesion of microalgae pose significant problems in maritime and coastal industrial activities. This study investigated the algicidal mechanisms of UV-LEDs and the synergistic effects of UV-LEDs combined with chlorine treatments in seawater, showing that the combined treatments were more effective in inactivating microalgae. The optimal combination of UV285 and 0.8 mg L-1 chlorine demonstrated the highest inactivation rate with lower energy consumption, indicating a synergistic algicidal effect for potential industrial applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Jordin Metz, Pengxiao Zuo, Bo Wang, Michael S. Wong, Pedro J. J. Alvarez
Summary: Combining ultraviolet light and chlorine can enhance the degradation of perfluorooctanoic acid (PFOA), a type of per- and polyfluoroalkyl substance (PFAS). This method not only increases the removal rate of PFOA, but also generates a significant amount of fluoride. Radical scavenger tests confirmed the important role of Cl· and Cl-2(·) in the degradation process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Environmental Sciences
Ae-Jung Hong, Jaewon Lee, Youngho Cha, Kyung-Duk Zoh
Summary: This study investigated the degradation mechanism and kinetics of Propiconazole (PRO) during UV photolysis and UV/H2O2 processes, and identified the transformation products (TPs). The results showed that the UV/H2O2 process was effective in removing PRO, its TPs, and the resulting toxicity in water.
Article
Environmental Sciences
Zehong Chen, Pan Xia, Dazhi Wang, Xiaodong Niu, Lixin Ao, Qiang He, Sha Wang, Zhihong Ye, Ignasi Sires
Summary: This study discusses the role of active chlorine and Fe(IV)-oxo species (FeIVO2+) as primary oxidizing agents in the HClO-mediated Fered-Fenton (EF-Fere-HClO) process and their dependence on the pollutant structure. It was found that the reaction between HClO and Fe2+ generates FeIVO2+, rather than center dot OH or Cl center dot suggested in the literature. The FeIVO2+ and center dot OH can selectively react with electron-rich compounds and simultaneously non-selectively attack other compounds formed from Fenton's reaction.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Miljana Radovic Vucic, Rada Baosic, Jelena Mitrovic, Milica Petrovic, Nena Velinov, Milos Kostic, Aleksandar Bojic
Summary: The study found that photodegradation is most effective in the first 10 minutes of treatment of organic pollutants in simulated urban wastewater. Pearson's correlation coefficient analysis and principal component analysis were used to determine the relationship between different degradation processes and the structure of compounds and degradation efficiency. This analysis allows for a more efficient choice of degradation processes and determination of treatment costs.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
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)