Article
Engineering, Multidisciplinary
Saied Ehsanpour, Majid Riahi Samani, Davood Toghraie
Summary: In this study, eggshell/poly pyrrole composites were used to remove chromium (VI) from water. The experimental factors included contact time, pH of the solution, adsorbent dosage, and adsorption isotherms. The results showed that the composites had a favorable effect on chromium removal, especially when prepared with 2g/L Poly Ethylene glycol in a mixture of water and ethanol solvents. The optimum removal time was 30 minutes, and the highest removal percentage was observed at pH 5. The adsorption process followed Langmuir and Freundlich isotherms, and the maximum chromium adsorption capacity was 175.5 mg/g.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Daniel Alves Barcelos, Maria Clara Goncalves
Summary: Visible-light-photoactive titania micro- or nanoparticles have shown great potential in various industrial applications, especially in environmental remediation. The sol-gel method, with its simplicity, versatility, and green chemistry approach, has been successfully employed for synthesizing crystalline and amorphous TiO2 micro- and nanoparticles. This short review aims to discuss the recent advancements in visible-light-photoactive titania-based nanoparticles for environmental remediation. Co-doping of titania, titania composite design, and the use of amorphous networks have been the most commonly used strategies to achieve this goal. Finally, predictions about the future developments in these fields are provided.
Article
Environmental Sciences
Jianlei Gao, Mengyuan Feng, Yixin Yan, Zixu Zhao, Yingchun Wang
Summary: In this research, a new composite adsorbent (SC@ZVI@CS-AA) was designed and synthesized for the removal of Cr(VI) in groundwater. The adsorption process was dominated by chemisorption and the removal efficiency of Cr(VI) reached 95%. SC@ZVI@CS-AA had good cyclic adsorption performance, showing great potential in the remediation of Cr(VI)-contaminated groundwater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Yefan Qing, Wei Gao, Yantong Long, Yijin Kang, Chen Xu
Summary: In this study, a Ti-based metal-organic framework (MOF) was functionalized by introducing amidoxime groups, resulting in excellent Cr(VI) adsorption performance.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Mehrdad Malekshahi, Samad Sabbaghi, Kamal Rasouli
Summary: Ceramic membranes with high heat and chemical resistance are essential in the nanofiltration process under harsh conditions. In this study, alumina-titania composite ceramic membranes with a gamma-alumina interlayer were fabricated using sol-gel and dip coating techniques for salt rejection. The membranes exhibited crack-free surfaces after calcination at 450°C. XRD analysis revealed the crystal structure of the membranes. The rejection rate of chlorine was pH-dependent. This research provides a composite ceramic nanofiltration membrane for high-pressure desalination, and the membrane's surface remained unchanged after five cycles, making it a promising candidate in the wastewater treatment field.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Metallurgy & Metallurgical Engineering
D. P. Ordinartsev, N. Pechishcheva, S. Kh Estemirova, A. Kim, K. Yu Shunyaev
Summary: In this study, a composite sorbent based on montmorillonite was synthesized, which exhibited enhanced adsorption efficiency for Cr(VI) ions. It has potential applications in wastewater treatment and the extraction of chromium compounds.
Review
Polymer Science
Xiaoqing Yuan, Jingxia Li, Lin Luo, Zhenyu Zhong, Xiande Xie
Summary: This study reviewed the mostly investigated polymeric materials for removing Cr(VI), emphasizing the strategies of assembling functional groups, reducing self-aggregation, and enhancing stability and mechanical strength to improve the performance of polymeric adsorbents. The maximum adsorption capacities of these polymers towards Cr(VI) ranged from 3.2 to 1185 mg/g according to the Langmuir isotherm model. Various mechanisms, including complexation, chelation, reduction, electrostatic attraction, anion exchange, and hydrogen bonding, were involved in the removal of Cr(VI). Factors such as pH, initial concentration, temperature, anions, and cations affected the adsorption of Cr(VI) and the regeneration of the adsorbents. The study provides insights for developing more robust polymeric adsorbents and promoting the treatment of Cr(VI)-containing wastewater.
Article
Environmental Sciences
Bowen Yang, Jiawei Dai, Yuan Zhao, Zhanchao Wang, Jingwei Wu, Caiya Ji, Yuhu Zhang, Xiao Pu
Summary: Biochar-coupled Fe3O4@SiO2/TiO2/g-C3N4 composites were successfully synthesized and exhibited excellent performance in removing high-concentration tetracycline (TC) through middotOH and middotO(2)(-) generation. The composites showed a removal rate of 91.88% within 3 hours and a degradation rate constant of 0.0068 min(-1). The outstanding performance was attributed to factors such as high specific surface area, enhanced visible light response, introduction of magnetic nanoparticles and biochars, Z-scheme heterojunction, and extraordinary adsorption capacity.
Article
Chemistry, Physical
Daniela Meroni, Melissa G. Galloni, Carolina Cionti, Giuseppina Cerrato, Ermelinda Falletta, Claudia L. Bianchi
Summary: This study demonstrates, for the first time, the high efficiency of PANI/TiO2 nanostructures in the removal of NO2 under dark and light conditions. The heterostructures were synthesized using a green method and characterized for their composition, structure, morphology, and oxidation state. The results show that the unique PANI structure promotes two mechanisms for NO2 removal in the dark (adsorption and chemical reduction), while photocatalytic behavior prevails under light irradiation, leading to complete NOx degradation. The best-performing materials exhibit high stability without significant activity loss during recycling tests. Overall, this material can provide an innovative and efficient solution for NOx abatement day and night.
Article
Biochemistry & Molecular Biology
Laura Cervera-Gabalda, Cristina Gomez-Polo
Summary: In this study, magnetic carbon nanocomposites were successfully used for the removal of Cr (VI). The results showed that the magnetic adsorbents synthesized at high annealing temperature exhibited high magnetization for magnetic separation and large specific surface area for enhanced pollutant adsorption. The adsorption tests confirmed the ability of the synthesized nanostructures to remove Cr (VI), and the materials showed reusability after consecutive adsorption cycles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Chemical
Houda Boustila, Yasmine Boutillara, Leticia Fernandez Velasco, Ali Djellali, Sana Tazibet
Summary: This study investigates the dynamic adsorption of Cr(VI) and Pb(II) in single and binary mixture solutions using differently activated carbon materials obtained from olive stones under different pH conditions. The results show that the surface pH of activated carbon plays a crucial role in the adsorption of Cr(VI), while the medium pH and the contaminant concentration affect the efficiency of the adsorption process.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Ewelina Weidner, Katarzyna Siwinska-Ciesielczyk, Dariusz Moszynski, Teofil Jesionowski, Filip Ciesielczyk
Summary: A novel TiO2-ZrO2 hybrid oxide material enriched with lanthanum was successfully synthesized via a sol-gel process and applied in tetracycline removal. Lanthanum was introduced to enhance adhesion of organic compound to the material's surface, improving adsorption capacity and photocatalytic activity. The material showed high efficiency in removing tetracycline from wastewater solutions.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Nur Shafiqah Jamaluddin, Nur Hashimah Alias, Sadaki Samitsu, Nur Hidayati Othman, Juhana Jaafar, Fauziah Marpani, Woei Jye Lau, Yong Zen Tan
Summary: Hexavalent chromium is a hazardous heavy metal that can cause severe effects on human health and the environment. In this study, delaminated MXene was successfully synthesized and used to efficiently remove hexavalent chromium from water through adsorption-assisted photocatalysis.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Mabkhoot Alsaiari
Summary: Efforts to create a novel visible light efficient photocatalyst using biomass derived active carbon modified TiO2 have shown successful results in reducing chromium (VI) to chromium (III) under visible light. The developed photocatalysts demonstrated enhanced photo-reduction efficiencies and recyclability, with promising potential for practical applications.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
Article
Engineering, Environmental
Haowen Zou, Jiawei Zhao, Feng He, Zhong Zhong, Jinsheng Huang, Yulin Zheng, Yue Zhang, Yicheng Yang, Fang Yu, M. Asaad Bashir, Bin Gao
Summary: A novel biochar/iron oxide composite was successfully prepared by ball milling iron-laden biochar, showing fast kinetics and large adsorption capacity for Cr(VI) removal. The composite performed well under acidic pH conditions, but the presence of competition ions inhibited the removal efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(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)