Article
Biology
Guangshun Yu, Na Feng, Dan Zhao, Hao Wang, Yi Jin, Dandan Liu, Zhenhua Li, Xinjian Yang, Kun Ge, Jinchao Zhang
Summary: Hydroxyl radicals are considered one of the most toxic and harmful free radicals to organisms, making studies involving them increasingly important. Using upconversion nanoparticles for analyte imaging offers significant advantages over traditional methods, including higher spatial resolution, reduced photodamage, and deep tissue penetration.
SCIENCE CHINA-LIFE SCIENCES
(2021)
Article
Chemistry, Analytical
Feifeng Yang, Yue Zhu, Congyu Zhang, Ziyan Yang, Jia Yuan, Qing Zhu, Shushu Ding
Summary: This study presents a novel glass nanopore regulated by hydroxyl radicals, with excellent selective response and efficient regulation of ion transportation. It provides insight into the role of hydroxyl radicals in pathological events and shows promising potential for biomedical research.
ANALYTICA CHIMICA ACTA
(2022)
Article
Engineering, Environmental
Ning Chen, Mengyuan Geng, Danyu Huang, Mengxi Tan, Zipeng Li, Guangxia Liu, Changyin Zhu, Guodong Fang, Dongmei Zhou
Summary: Many studies have examined the redox behavior of sorbed ferrous ions on mineral surfaces, but few have investigated the formation of hydroxyl radicals during Fe(II) oxidation at circumneutral pH. This study found that the production of hydroxyl radicals was significantly higher in Fe(II)/α/γ-Al2O3 systems compared to dissolved Fe(II) alone. However, the production of hydroxyl radicals slightly decreased in Fe(II)/α-FeOOH/α-Fe2O3 systems. Mineral types and solution pH strongly influenced Fe(II) oxidation and hydroxyl radical production, which in turn impacted phenol degradation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Ning Chen, Danyu Huang, Guangxia Liu, Longgang Chu, Guodong Fang, Changyin Zhu, Dongmei Zhou, Juan Gao
Summary: This study found that the (OH)-O-center dot formation plays a crucial role in the degradation of PAHs during redox fluctuations, with the content of active Fe species being a key factor. Oxygenation induces the transformation of these active Fe species, affecting subsequent redox processes and organic contaminant degradation.
Article
Engineering, Environmental
Zixuan Zhao, Yunhe Li, Yuerong Zhou, Yilong Hou, Zhengyi Sun, Wenhao Wang, Jianfeng Gou, Xiuwen Cheng
Summary: In recent years, sulfite (S(IV)) has been used as an alternative to persulfates to remove antibiotics in wastewater. However, there is a need for a cheap, environmentally friendly, and effective catalyst. This study used a micron-scale iron-carbon composite (mZVI@C-800) coupled with S(IV) to degrade metronidazole (MNZ). The results showed that the MNZ removal rate reached 81.5% under optimized reaction conditions. The introduction of carbon enhanced the corrosion of mZVI, releasing more Fe2+ and improving the efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Marie-Claire Giel, Andrew S. Barrow, Christopher J. Smedley, William Lewis, John E. Moses
Summary: This study presents a novel and mild method for catalytic Markovnikov hydration of (E)-aryl enynes to corresponding enones using a bench-stable aminium salt, TBPA. The chemoselective and diastereoselective transformation proceeds under neutral metal-free conditions, delivering excellent product yields. The utility of this transformation is demonstrated through the synthesis of biologically important (E)-3-styrylisocoumarins, including a formal synthesis of achlisocoumarin III.
CHEMICAL COMMUNICATIONS
(2021)
Article
Environmental Sciences
Xiaobin Liao, Linlu Shen, Zhibin Jiang, Menglan Gao, Yu Qiu, Huan Qi, Chao Chen
Summary: This study revealed that metformin can directly form NDMA during ozonation, with the addition of ·OH scavenger enhancing its formation significantly. The impacts of bromide and HCO3- on NDMA formation by O3 and ·OH were different, the increase in pH promoted NDMA production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Ruchi Joshi, Thunyalux Ratpukdi, Kristofer Knutson, Amit Bhatnagar, Eakalak Khan
Summary: In the past two decades, ozone-based advanced oxidation processes (EOPs) have been extensively studied for the removal of emerging organic contaminants in water. However, the formation of carcinogenic bromate during EOPs treatment has become a challenge for the utilization of these processes in bromide-containing water. This review critically examines the mechanisms, influencing factors, advantages and disadvantages, and control strategies for bromate formation by four EOPs, and compares their economic and technical characteristics.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Zhen Wang, Yangyi Yu, Qin Guo, Chaoting Guan, Jin Jiang
Summary: This study investigates the relative role of different reactive intermediates in microscale and nanoscale zerovalent iron (ZVI) activated peroxydisulfate (PDS) processes. The results show that the relative role of Fe(IV) in PDS transformation varies in different stages, and the fast dissolution of nanoscale ZVI leads to a relatively lower relative role of Fe(IV) in PDS transformation.
Article
Engineering, Environmental
Yixin Huang, Jing Zou, Jinbin Lin, Haoyu Yang, Mengyun Wang, Jiawen Li, Wei Cao, Baoling Yuan, Jun Ma
Summary: This study discovers that 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) can serve as both an activator and an electron shuttle to enhance the activation of peroxydisulfate (PDS) and enhance the degradation of diclofenac (DCF). The PDS/ABTS system generates multiple reactive species, with ABTS(center dot+) and (OH)-O-center dot directly contributing to the degradation of DCF. The PDS/ABTS system shows good anti-interference capacity and further improved performance can be achieved by encapsulating ABTS into cellulose.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yu Cao, Shanqing Jiang, Xudong Kang, Hankun Zhang, Qiuya Zhang, Liping Wang
Summary: The Fe-phenol modified biochar enhanced the degradation of atrazine by Fe(VI) under alkaline conditions. Fe(V)/Fe(IV) and ·OH were identified as the main active oxidizing species, contributing to 70% and 24% of degradation, respectively. The combination of Fe-phenol modified biochar and Fe(VI) showed promising potential for atrazine removal with significant reduction in total organic carbon content and toxicity.
Article
Environmental Sciences
Lei Tian, Shan-Shan Liu, Xun-Heng Jiang, Li-Sha Chen, Shao-Lin Wu, Wen-Jun Xiao, Jie-Ping Fan, Dai-She Wu, Jian-Ping Zou
Summary: This study investigates the selective oxidation capacity of coexisting SO4 center dot(-) and center dot OH towards organic moieties with differing electronegativity, shedding light on the degradation pathways of an organic contaminant.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Soil Science
Ruixia Han, Jitao Lv, Suhuan Zhang, Zhe Wang, Gang Li, Shuzhen Zhang
Summary: This study investigates the microbial reduction of iron and the production of reactive oxygen species (ROS) in soils. The results show sustained production of hydroxyl radicals (·OH) during redox cycles, which is positively correlated to the content of bio-reduced Fe(II). Furthermore, the study suggests that dithionite extractable Fe can serve as an indicator to evaluate the potential of ·OH production.
Article
Chemistry, Applied
Chenxi Zhang, Yu Liu, Tuo Zhang, Chenyan Lv, Jiachen Zang, Guanghua Zhao
Summary: In this study, homopolymeric scallop ferritin was prepared for the first time and found to have a stronger ability to protect DNA from iron-induced oxidative damage compared to homopolymeric shrimp ferritin. This difference is attributed to the lower production of hydroxyl radicals during iron oxidation in the presence of scallop ferritin. Kinetic results showed that scallop ferritin catalyzes the oxidation of ferrous ions into non-toxic ferric ions faster than shrimp ferritin. The crystal structure of scallop ferritin revealed differences in the triple axis channel and ferroxidase site compared to shrimp ferritin, contributing to its stronger ferroxidase activity.
Article
Chemistry, Physical
Arvind Kumar, Anupama Datta, Satish Kumar
Summary: A naphthopyran derivative with a suitably positioned hydroxyl group was synthesized and characterized. The derivative formed complexes with metal ions, and showed a noticeable color change in the presence of Cu2+ ions. The metal binding was analyzed using UV-vis spectrophotometry and digital colorimetry, and the formation of complexes was investigated using density functional theory and time-dependent theory.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Analytical
Gang Qu, Yuxin Zhao, Qiaoli Zhang, Jina Wu, Xiaosen Li, Yang Yang, Shilei Liu
Summary: In this study, magnetic mesoporous materials combined with real-time in situ mass spectrometry were used for the high-throughput detection of hydrolyzed products of organophosphorus nerve agents. The method showed good linearity, low limits of detection and quantification, and high extraction recoveries. The magnetic preparation method used was quick, cost-effective, rugged, and safe. The results demonstrated the potential of this method for rapid and efficient determination of the target analytes in environmental samples.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Anna Hildebrand, Mariam Merchant, Danny O'Hare
Summary: Substandard and falsified artemisinin derivatives in antimalarials have caused significant deaths and economic losses. This study evaluates the feasibility of voltammetric methods for identifying and quantifying artemether. The findings suggest that electrochemical analysis shows promise as a method for artemether identification and quantification.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Marx Osorio Araujo Pereira, Alvaro Ferreira Junior, Edson Silvio Batista Rodrigues, Helena Mulser, Giovanna Nascimento de Mello e Silva, Wallans Torres Pio dos Santos, Eric de Souza Gil
Summary: Brazilian spotted fever (BSF) is a serious and rapidly evolving disease. A new impedimetric immunosensor was developed for rapid diagnosis by measuring specific antibodies in plasma. The sensor demonstrated selectivity and accuracy, and has potential for important applications in diagnostic testing.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Kathrin Schilling, Ronald A. Glabonjat, Olgica Balac, Marta Galvez-Fernandez, Arce Domingo-Relloso, Vesna Slavkovich, Jeff Goldsmith, Miranda R. Jones, Tiffany R. Sanchez, Ana Navas-Acien
Summary: Analysis of trace elements in urine is an important tool for assessing exposures, diagnosing nutritional status, and guiding public health and healthcare intervention. This study provides a sensitive method for analyzing 18 elements in urine samples, using only 100 μL. The results show good accuracy and sensitivity of the method.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Mengya Li, Shijie Liu, Shiliang Guo, Dong Liang, Miaoyun Li, Yaodi Zhu, Lijun Zhao, Jong-Hoon Lee, Gaiming Zhao, Yangyang Ma, Yanxia Liu
Summary: In this study, a magnetic flow device was developed to purify spores in a culture medium system. The device used magnetic nanoparticles to absorb vegetative cells, separating them from the spores. The achieved purity of the collected spores was over 95%. The study also demonstrated a rapid quantitative detection method using Raman spectroscopy.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Wanqiong Liu, Zixuan Wu, Jianwei Peng, Zebin Xu, Yong Liang
Summary: Metal-organic frameworks (MOFs) are effective carriers for molecular imprinting, but their poor dispersibility in aqueous solution is a significant drawback. In this study, we have applied amphiphilic block copolymers and molecularly imprinted technology on MOFs to improve the hydrophilicity of molecularly imprinted fluorescent materials.
ANALYTICAL METHODS
(2024)