Article
Engineering, Environmental
Li Liu, Yu Bai, Lei Ouyang, Lijin Huang, Qin Shuai
Summary: In this study, a magnetic porous organic polymer, MTAP, was developed for efficient recovery of rare earth elements. The material demonstrated rapid adsorption kinetics, high adsorption capacities, and successful application in industrial wastewater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Seenu Ravi, Seo-Yul Kim, Youn-Sang Bae
Summary: This study introduces two novel benzylphosphate-based covalent porous organic polymers (BPOP-1 and BPOP-2) for efficiently recovering heavy rare earth elements (HREEs) with high adsorption capacities and superior adsorption kinetics. The materials exhibit unusual crystalline nature, large surface area, hierarchical pore structure, and exceptional cyclic adsorption/desorption properties. The introduction of phosphate functionality into a robust porous polymer backbone with high surface area is a promising strategy for selective HREEs capture from wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Quan Wan, Beibei Liu, Miaoyue Zhang, Man Zhao, Yuan Dai, Wenshen Liu, Kengbo Ding, Qingqi Lin, Zhuobiao Ni, Jingjing Li, Shizhong Wang, Chao Jin, Yetao Tang, Rongliang Qiu
Summary: This study investigated the co-transport behavior of three REEs3+ (La3+, Gd3+ and Yb3+) with and without biochar nanoparticles (BC NPs) in water-saturated porous media. It was found that the presence of REEs3+ enhanced the retention of BC NPs in quartz sand (QS), and REE fractionation occurred during the co-transport. This study provides insights into the fate of BC NPs and REEs3+ in porous media and highlights the need to consider the mutual effects between BC NPs and REEs3+ in contaminated aquatic and soil systems.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Bin Ji, Wencai Zhang
Summary: This study focused on the recovery of rare earth elements (REEs) from kaolinite through selective leaching and the synthesis of zeolites from the leaching residue. The results showed that the pH static leaching method achieved over 90% leaching of REEs from metakaolinite, while only extracting less than 2% of the major constituents. Zeolites with different compositions were successfully synthesized, and high purity sodalite exhibited superior adsorption capacity for Ce3+ compared to zeolite A. These findings suggest that kaolinite could be a potential source for REE recovery, and the resulting leaching residue could be used for the synthesis of zeolites as promising adsorbents for Ce3+ recovery.
Article
Nanoscience & Nanotechnology
Alexander T. Brown, Kenneth J. Balkus
Summary: There is a need for the development of new solid-phase adsorbents for element extraction from coal ash. High surface area carbon adsorbents are effective in adsorbing rare earth elements, and MFC-O has shown exceptional extraction capabilities for rare earth elements, thorium, and uranium. The binding properties of MFC-O make it an attractive material for selective extraction of rare earth elements from coal ash.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Bin Ji, Wencai Zhang
Summary: The experiment on rare earth recovery and preparation of porous silica from kaolinite containing rare earth elements shows that thermal treatment and selective leaching are effective methods. In addition, the application of analytical methods and response surface methodology in the process is important for improving product quality and yield.
Article
Engineering, Chemical
Xuyi Wei, Xiaohui Mao, Wenqing Qin, Hongbo Zeng, Junwei Han
Summary: In this study, a natural kaolinite loaded onto alginate hydrogel was used to prepare ALG@KLN composites, which achieved efficient recovery of rare earth elements (REEs) using an eco-friendly method. ALG@KLN exhibited high adsorption capacity and reusability, and the adsorption mechanism was mainly through chemical chelation and electrostatic interaction. This research is of great significance for the development of economical and eco-friendly REE adsorbents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Yinzhi Lv, Lin Chen, Anning Zhang, Guodong Sheng, Qing Liao
Summary: The separation and recycling of rare earth elements (REEs) are important due to their high demand, limited resources, specific uses, and environmental issues. In this study, two-dimensional Ti3C2Tx MXene was used to remove Nd(III) and La(III) REEs from water, and its physicochemical properties were investigated. Various parameters and adsorption kinetics and isotherms were examined. The results showed that Ti3C2Tx MXene has a great potential for extracting REEs from an aqueous solution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Wen-Hui Zhang, Su-Jun Ding, Qing-Song Zhang, Hui Yi, Zi-Xiang Liu, Meng-Li Shi, Rong-Feng Guan, Lu Yue
Summary: Rare earth-doped porous In2O3 nanosheets significantly improve gas-sensing performance, with 6% Yb-doped In2O3 nanosheets exhibiting the best gas-sensing performance, characterized by fast response and recovery time, excellent selectivity, and stability, showing potential for next-generation gas sensor applications.
Article
Engineering, Chemical
Lingxian Han, Yu Peng, Jiutong Ma, Zhan Shi, Qiong Jia
Summary: This study for the first time employed copolymer precursors to construct HCPs and successfully applied them to the adsorption of REEs, laying a foundation for further design and application of various HCPs in the field of adsorption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Francois Nkinahamira, Alaaeddin Alsbaiee, Yuwen Wang, Xiaoyong Yang, Tian-Yuan Chen, Meixian Cao, Meiling Feng, Qian Sun, Chang-Ping Yu
Summary: The synthesized PCDP-M-SHM composite showed excellent rare earth element (REE) recovery performance, achieving quantitative desorption of adsorbed REEs using dilute acidic solutions, and selective purification of REEs from synthetic solutions and industrial wastewater with enrichment factors ranging from 10 to 30. The separation factor confirmed the effectiveness of PCDP-M-SHM to recover REEs from digested sludge with much higher distribution coefficients than coexisting elements. These results suggest that the synthesized adsorbent is a promising solution for REEs separation and purification from water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yalin Yang, Qiuting Yan, Xiulan Weng, Gary Owens, Zuliang Chen
Summary: In this study, iron nanoparticles (FeNPs) synthesized from euphorbia cochinchinensis extracts were successfully used for selective recovery of rare earth elements (REEs) from mining wastewater. The FeNPs showed high selectivity for Y(III) and Ce(III) compared to Zn(II) due to selective adsorption and ion exchange mechanisms. The FeNPs exhibited excellent reusability, making them a potential high-quality selectivity material for recovering REEs from mining wastewaters.
Article
Biochemistry & Molecular Biology
Ahmed M. Shahr El-Din, Moubarak A. Sayed, Tarek M. Monir, Nesreen M. Sami, Amal M. I. Aly
Summary: A novel alginate complex was developed for selective separation of molybdenum from rare earth elements, showing excellent adsorption capacity and recovery performance for Mo(VI) ions. The material was characterized and investigated, confirming its potential for selective separation of molybdenum from REEs-containing solutions and demonstrating good reusability over multiple cycles. The adsorption mechanism was elucidated to be governed by electrostatic interaction and ion exchange.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Applied
Xiaorui Wang, Wei Cheng, Renda Xu
Summary: This study investigates the adsorption behaviors of rare earth elements (REY) on organic matter in coal through leaching tests and molecular simulation calculations. The results show that the organic matter in coal has a strong adsorption capacity for heavy rare earth elements (HREY) compared to light rare earth elements (LREY). The molecular simulation calculations also confirm the advantage of HREY in adsorption on organic matter. These findings are of great significance for the application of rare earth elements in coal-based resources.
JOURNAL OF RARE EARTHS
(2023)
Article
Metallurgy & Metallurgical Engineering
Binyuan Gao, Min Gan, Chongran Sun, Hui Chen, Xi Liu, Qianzi Liu, Yuguang Wang, Haina Cheng, Hongbo Zhou, Zhu Chen
Summary: A cell-free cascade enzymatic process was developed to produce gluconate from low-cost rice straw as an alternative to ammonium sulfate for leaching ion-adsorption rare earth ores. Compared to fermentation, the enzymatic process showed higher yield and superior leaching efficiency. This study provides a new avenue for potentially economical production of biogenic lixiviants from renewable and cheap feedstocks.
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)