Article
Engineering, Environmental
Isabel F. F. Neto, Helena M. V. M. Soares
Summary: This study introduces an efficient and simple hydrometallurgical process for recycling gold from waste printed circuit boards, utilizing chlorination and ion-exchange steps. The process achieves high recovery rates and purities of gold, minimizing the number of steps and waste produced.
Article
Engineering, Environmental
Istvan B. Illes, Tamas Kekesi
Summary: By studying the leaching kinetics of indium from waste liquid crystal displays (LCD), it was found that high recovery rates can be achieved under certain conditions. Anion-exchange sorption can effectively remove impurities, and specific elements can be eluted and removed using certain solutions. The obtained metallic indium product has a high purity level.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Metallurgy & Metallurgical Engineering
Long Wang, Yuan Sun, Shi-yang Wang, Ting-an Zhang, Guo-zhi Lu
Summary: To improve the recovery efficiency of strategic metals from superalloy scrap, an ultrasonic-assisted leaching method was proposed. During the ultrasonic-assisted leaching process, significant improvement in leaching rates of Re, Ni, Co, Al, Cr, and W were observed compared to the normal leaching process. This improvement can be attributed to the physical and chemical coupling effects of ultrasonic cavitation, which enhance contact between solution and superalloy scrap and promote chemical oxidation.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Engineering, Chemical
Hae Min Kim, Chuan Hu, Ho Hyun Wang, Jong Hyeong Park, Nanjun Chen, Young Moo Lee
Summary: This study reports the use of side-chain-type s-PDTP copolymers as ionomers and membranes for anion exchange membrane fuel cells (AEMFCs). These copolymers exhibit high alkaline stability, excellent micromorphology, and high OH- conductivity. The ionomers with moderate ion-exchange-capacity and rational water uptake show optimal AEMFC performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Polymer Science
Nanjun Chen, Young Moo Lee
Summary: Anion exchange membrane fuel cells (AEMFCs) are considered a low-cost alternative to proton exchange membrane fuel cells (PEMFCs) for clean energy conversion, as they utilize non-platinum group metals as electrocatalysts under alkaline conditions. The development of high-performance anion-exchange polyelectrolytes (AEPs) has led to significant progress in power density and durability of AEMFCs, making them comparable to or even better than PEMFCs.
PROGRESS IN POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Alessandra Carbone, Sabrina Campagna Zignani, Irene Gatto, Rolando Pedicini, Claudio Oldani, Alice Cattaneo, Antonio Salvatore Arico
Summary: Alkaline membrane water electrolysis using perfluorinated polymer as an alternative to hydrocarbon-based anion exchange membranes (AEMs) shows promising applications for green hydrogen production. The introduction of quaternary ammonium groups onto Aquivion (R) perfluorinated backbone through a simple two-step functionalization reaction using a low toxicity dispersant is successful. The formed AEM exhibits enhanced ion dissociation and shows only limited degradation of functional groups in alkaline solution, making it suitable for electrolysis with high current density and low degradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Rekha Panda, Rukshana Parween, Nityanand Singh, Kyoungkeun Yoo, Rajesh Kumar Jyothi, Manis Kumar Jha
Summary: This paper focuses on a novel chemical processing technique for the recovery of silver and low density oil from scrap computer keyboards. The developed bench scale process shows potential for application in the industry after further testing.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Shan Lin, Zhiwen Wang, Qinghua Zhang, Shengru Chen, Qiao Jin, Hongbao Yao, Shuai Xu, Fanqi Meng, Xinmao Yin, Can Wang, Chen Ge, Haizhong Guo, Chi Sin Tang, Andrew T. S. Wee, Lin Gu, Kui-juan Jin, Hongxin Yang, Er-Jia Guo
Summary: This study demonstrates the synthesis of high-quality single-phase chromium oxynitride thin films using in-situ nitrogen doping, which exhibits robust ferromagnetic and insulating state. By increasing nitrogen content, the crystal structure changes and saturation magnetization decreases significantly. The authors also achieve a large and controllable exchange bias field in the chromia heterostructures through synthetic anion engineering, reflecting potential applications in modern magnetic sensors and read heads.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alvaro Seijas-Da Silva, Jose Alberto Carrasco, Bruno J. C. Vieira, Joao C. Waerenborgh, Eugenio Coronado, Gonzalo Abellan
Summary: In this study, a hybrid NiFe-LDH family is synthesized through anion exchange reactions using surfactant molecules, increasing the interlayer space and achieving complete magnetic decoupling of the layers. The results of magnetic analysis and Mossbauer spectroscopy validate the potential of molecular engineering for designing hybrid layered magnetic materials approaching the 2D magnetic limit.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Chunyan Li, Shehani T. Wetthasinghe, Huina Lin, Tianyu Zhu, Chuanbing Tang, Vitaly Rassolov, Qi Wang, Sophya Garashchuk
Summary: An efficient modeling approach is presented to assess the chemical stability of cationic cobaltocenium derivatives using machine learning techniques. The stability of the complexes is found to strongly correlate with the energies of the highest occupied and lowest unoccupied molecular orbitals. Neural network models are developed to predict the bond dissociation energies with high accuracy. The results demonstrate the potential of machine learning techniques in predicting complex relationships with small data sets.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2022)
Article
Chemistry, Physical
Shehani T. Wetthasinghe, Chunyan Li, Huina Lin, Tianyu Zhu, Chuanbing Tang, Vitaly Rassolov, Qi Wang, Sophya Garashchuk
Summary: Metallocenium cations, used in an anion exchange membrane of a fuel cell, show great thermal and alkaline stability, which can be enhanced by modifying the substituent groups on the cyclopentadienyl rings. This study establishes a relationship between the bond dissociation energy (BDE) of cobaltocenium derivatives and chemistry-informed descriptors obtained from electronic structural calculations.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Yuan Liu, Yitong Dong, Tong Zhu, Dongxin Ma, Andrew Proppe, Bin Chen, Chao Zheng, Yi Hou, Seungjin Lee, Bin Sun, Eui Hyuk Jung, Fanglong Yuan, Ya-kun Wang, Laxmi Kishore Sagar, Sjoerd Hoogland, F. Pelayo Garcia de Arquer, Min-Jae Choi, Kamalpreet Singh, Shana O. Kelley, Oleksandr Voznyy, Zheng-Hong Lu, Edward H. Sargent
Summary: This study introduces a new type of perovskite quantum dots that remain stable in a thin layer of precursor solution and utilize strained QDs as nucleation centers to drive homogeneous crystallization. These new materials show suppressed Auger bi-exciton recombination and bright luminescence under high excitation, leading to primary red LEDs with significantly enhanced performance compared to control materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Wen Ma, Chengdong Peng, Xueling Song, Lu Zhang, Honghan Fei
Summary: In this study, a new type of 3D coordination polymers capable of efficiently oxidizing benzylic C(sp(3))-H bonds in a green and heterogeneous manner were synthesized. Furthermore, this material could cleave Co-II-carboxylate bonds to form atomically thin cobaltate nanosheets, leading to enhanced catalytic performance.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xingyu Wu, Nanjun Chen, Chuan Hu, Harm-Anton Klok, Young Moo Lee, Xile Hu
Summary: A fluorination strategy is reported to create a phase-separated morphological structure in poly(aryl piperidinium) anion-exchange membranes (AEMs). The fluorinated AEMs possess high conductivity and dimensional stability, as well as excellent mechanical and chemical stability. AEMFCs using these fluorinated AEMs achieve outstanding peak power density and remain stable over extended operation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Tariq Sheikh, Gokul M. Anilkumar, Tisita Das, Atikur Rahman, Sudip Chakraborty, Angshuman Nag
Summary: Hybrid lead halide perovskites and their derivatives are important optoelectronic materials, but their water instability is a major challenge in material design. In this study, a hybrid lead halide perovskite derivative system, (4,4'-VDP)Pb2Br6, was designed using the concepts of pi-conjugation and cation-pi interaction. The system exhibited improved photoconductivity and water stability due to the electronic communication between the Pb-Br units and the intermolecular cation-pi interaction throughout the organic sublattice.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Analytical
Monika Gorska, Pawel Pohl
Summary: In this study, novel atmospheric pressure microplasma systems were investigated for the determination of Ga and In by optical emission spectrometry (OES), with optimized working parameters and the addition of low molecular weight organic compounds (LMWOCs) into the solution. The impact of concomitant ions on the signals intensity of Ga and In was also studied, showing the resistance to matrix effects. The detection limits obtained under optimized conditions were comparable to those obtained by large-scale instrumentation, confirming the accuracy and reliability of the developed FLC-APGD-OES method.
Article
Chemistry, Applied
Krzysztof Greda, Pawel Pohl
Summary: A new method of optical emission spectrometry (OES) using micmplasma source was developed for the determination of Na, K, Mg, Ca, and Zn in wine, without the need for acid digestion. The study also found that red wines have higher levels of K and Mg, and different grape varieties can be distinguished based on the concentrations of K and Ca.
Article
Chemistry, Applied
Piotr Cyganowski, Joanna Wolska
Summary: This study presents a new approach for synthesizing aromatic amines using nitroaromatic compounds (NARs) in contaminated wastewaters. The researchers developed anion exchange membranes with gold nanoparticles (AuNPs) to simultaneously reduce and separate the NARs. The nanocomposite membranes formed using tetrahydrofuran (THF) showed better performance in the reduction and separation process.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Analytical
Monika Gorska, Pawel Pohl
Summary: Novel atmospheric pressure glow discharge microplasma systems were investigated for the direct determination of Br and Cl, showing resistance to foreign ions at relatively high concentrations in water and juices samples.
Article
Chemistry, Applied
Anna Dzimitrowicz, Pawel Pohl, Magda Caban, Piotr Jamroz, Piotr Cyganowski, Mateusz Bykowski, Aleksandra Klimczak, Aleksandra Bielawska-Pohl
Summary: This research proposed a method for functionalizing orange juice using direct current atmospheric pressure glow discharge, which increased the concentration of certain substances and prolonged the shelf life of the juice. The treated juice showed no toxicity towards non-malignant cells, but exhibited cytotoxicity towards malignant cells, making it a potential alternative to untreated juice.
Article
Chemistry, Applied
Pawel Pohl, Anna Dzimitrowicz, Piotr Cyganowski, Piotr Jamroz
Summary: Cold atmospheric pressure plasma (CAPP) technology can be used to treat fruit and vegetable beverages, not only extending their shelf-life, but also improving their nutritional properties and anticancer activity. The presence of numerous reactive oxygen and nitrogen species (RONS) at the plasma-liquid interface can increase the content of nutritional and bioactive compounds in the beverages.
Article
Chemistry, Analytical
Pawel Pohl, Maja Welna, Anna Szymczycha-Madeja, Krzysztof Greda, Piotr Jamroz, Anna Dzimitrowicz
Summary: The Box-Behnken response surface design and individual desirability functions were used to develop a new and simplified sample preparation method for coffee brews. The method showed high precision and accuracy, and was successfully applied to the multielement analysis of different types of coffee and various brewing devices.
Article
Multidisciplinary Sciences
Piotr Cyganowski, Anna Dzimitrowicz
Summary: Stable and efficient heterogeneous nanocatalysts for the reduction of 4-nitrophenol have been widely studied in recent years. This research presents a unique in situ method to produce novel polymeric nanocomposites containing rhenium nanostructures (ReNSs), which enhances the catalytic activity and stability for the decomposition of 4-nitrophenol. The nanomaterials were characterized using FT-IR, TEM, and XRD, and the catalytic efficiency was evaluated using UV-Vis spectra and pseud-first order modeling. The results showed successful loading of ReNSs in the polymeric matrices, with a high conversion rate of 90% and a rate constant of 0.29 min(-1) over 11 catalytic cycles.
SCIENTIFIC REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Katarzyna Smolinska-Kempisty, Joanna Wolska, Marek Bryjak
Summary: The study demonstrates successful grafting of molecularly imprinted layers on the surface of modified polypropylene porous membranes, which showed better performance compared to non-imprinted membranes in filtration and sorption processes.
Article
Biochemistry & Molecular Biology
Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: A fully validated ICP-OES-based method combined with simplified sample preparation was proposed for the determination of elements in YM drinks. Acidification with HNO3 and US provided the best results with LODs at 0.11-8.5 ng g(-1), precision below 5%, and trueness better than 5%. YM drinks commercially available in Poland were analyzed and found to have low bioaccessibility of essential elements but relatively high bioaccessible caffeine content.
Article
Environmental Sciences
Mujahid Ameen Khan, Anna Dzimitrowicz, Magda Caban, Piotr Jamroz, Dominik Terefinko, Wlodzimierz Tylus, Pawel Pohl, Piotr Cyganowski
Summary: The common utilization of antimicrobial agents in medicine and veterinary creates serious problems with multidrug resistance. This study used a DBD-CAPP system as a tool to deactivate nitrobased pharmaceuticals in solutions. The reactive species generated in the DBD-CAPP-treated liquid played a dual role in the degradation of the drugs and the production of Re nanoparticles. The catalytically enhanced DBD-CAPP achieved higher removal of Furazolidone and Chloramphenicol in waste solutions compared to DBD-CAPP alone.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Bachir Ben Seghir, Meriem Hima, Fatima Moulatti, Ibtihal Sahraoui, Ilham Ben Amor, Soumeia Zeghoud, Hadia Hemmami, Imane Kouadri, Asma Ben Amor, Mohammed Messaoudi, Shakeel Ahmed, Abdelkrim Rebiai, Pawel Pohl
Summary: The green approach-based nanoparticle synthesis is a cost-effective and ecologically responsible method. This article describes a simple method for producing MgO and ZnO nanoparticles using aqueous extracts of Zingiber officinale and Glycyrrhiza roots, and investigates their characterization and antibacterial activity.
Article
Engineering, Chemical
Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: An analytical method for determining total Sn in canned tomatoes was developed using hydride generation (HG) coupled to inductively coupled plasma optical emission spectrometry (ICP OES) without laborious sample preparation. Different reagents were tested for ultrasound-assisted extraction to replace the traditional wet sample digestion, and aqua regia showed the best results. The developed method had a detection limit of 0.74 ng g(-1), a precision of better than 6%, and a trueness of 98.4-104%.
Article
Biochemistry & Molecular Biology
Esra Altiok, Fatma Sen, Joanna Wolska, Piotr Cyganowski, Marek Bryjak, Nalan Kabay, Muserref Arda, Mithat Yuksel
Summary: This research investigated the removal of boron and arsenic from geothermal water using newly synthesized gel-like chelating resins. The results showed that the novel resins were able to reduce boron and arsenic concentrations in geothermal water below permissible levels for agricultural irrigation and drinking water. The optimal resin concentration for boron removal was determined to be 2 g/L, while for arsenic removal, a resin concentration of 8 g/L was needed for 94% removal using the novel resins compared to 32 g/L for commercially available resin. Column performance characteristics of the resins were also studied and compared to a commercially available resin.
Article
Engineering, Environmental
Anna Dzimitrowicz, Agata Motyka-Pomagruk, Piotr Cyganowski, Piotr Jamroz, Dominik Terefinko, Pawel Pohl, Tymoteusz Klis, Magda Caban
Summary: The study found that cold atmospheric pressure plasmas can effectively remove hazardous and endocrine disturbing compounds from wastewater, including Bisphenol A, Bisphenol S, etc., and may be applied in wastewater treatment plants in the future.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
