Article
Engineering, Environmental
Ruyuan Jiao, Jinbo Zhang, Xiaofang Yang, Xinmeng Zhu, Wei Gao, Dongsheng Wang
Summary: In this study, multiple analytical techniques were used to investigate the odor produced during the production of Captan pesticide and evaluate the effectiveness of odorant treatment methods used by the manufacturer. Refining during the production process was found to be the most significant factor influencing the type and concentration of odorants generated. Perchloromethylmercaptan and other chlorine-containing compounds were identified as key odorants based on odor activity value (OAV) calculations. The current odorant treatment showed a 40% removal rate, but also produced a new odorant, dimethyl disulfide. Therefore, a more targeted odorant treatment technique without the generation of new odorants is needed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Analytical
Alexander Brzhozovskiy, Alexey Kononikhin, Anna E. Bugrova, Grigoriy Kovalev, Pierre-Olivier Schmit, Gary Kruppa, Evgeny N. Nikolaev, Christoph H. Borchers
Summary: Mass spectrometry-based quantitative proteomic methods, such as prm-PASEF, are important tools for protein biomarker discovery and validation. This study demonstrated the use of prm-PASEF for absolute protein quantitation in human plasma, with improved sensitivity and a broad dynamic range. The prm-PASEF method showed excellent correlation with MRM, highlighting its suitability for absolute quantitative proteomics.
ANALYTICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Benjamin Heutte, Nora Bergner, Ivo Beck, Helene Angot, Lubna Dada, Lauriane L. J. Quelever, Tiia Laurila, Matthew Boyer, Zoe Brasseur, Kaspar R. Daellenbach, Silvia Henning, Chongai Kuang, Markku Kulmala, Janne Lampilahti, Markus Lampimaeki, Tuukka Petaja, Matthew D. Shupe, Mikko Sipila, Janek Uin, Tuija Jokinen, Julia Schmale
Summary: The Arctic environment is undergoing rapid transformation due to climate change, with aerosols playing a crucial but uncertain role in these changes. However, comprehensive year-round measurements of Arctic aerosol characteristics are limited, hindering the improvement of climate modeling for the future Arctic and global climate.
Article
Meteorology & Atmospheric Sciences
Jianan Zou, Junlin An, Qimin Cao, Honglei Wang, Junxiu Wang, Chen Chen
Summary: The study utilized a single particle aerosol mass spectrometer and a scanning mobility particle sizer spectrometer to measure the chemical composition and size distribution of aerosols in Nanjing, China. The physical and chemical characteristics of aerosols significantly affect scattering coefficients, with rapid optical hygroscopic growth at higher relative humidity. The results suggest that accurate size distribution and source apportionment of aerosols are crucial for simulating atmospheric optical scattering.
ATMOSPHERIC RESEARCH
(2021)
Article
Chemistry, Analytical
Wanzhen Han, Shiyu Du, Caowei Tang, Yiling Li, Ting Jiang, Wei Xu
Summary: The integration of a liquid-phase ion trap with a miniature mass spectrometer improves detection sensitivity and enables enrichment and separation of ions, making it suitable for the analysis of low abundant target molecules.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Emily Krzystowczyk, Vasudev Haribal, Jian Dou, Fanxing Li
Summary: Oxygen is a critical industrial gas with a projected global market reaching $48 billion/year. The chemical looping air separation (CLAS) approach using Sr0.8Ca0.2Fe0.4Co0.6O3-delta (SCFC) oxygen sorbent showed excellent stability and purity, with potential for further optimization. A sensitivity analysis on various operational and design parameters demonstrated the efficiency and potential of CLAS as an oxygen production technology.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Environmental
Xiaoxiao Li, Yuyang Li, Michael J. Lawler, Jiming Hao, James N. Smith, Jingkun Jiang
Summary: The study modified a TDCIMS to measure the composition of UFPs in urban Beijing without the use of radioactive materials. The results showed that UFPs in urban areas contain more nitrogen and sulfur-containing compounds compared to those in forest and marine sites.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Arick Castillo-Landero, Jorge Aburto, Jhuma Sadhukhan, Elias Martinez-Hernandez
Summary: This paper introduces a novel methodology to intensify a chemical process guided by modularity, aiming to improve safety and energy efficiency. A case study demonstrates that a design guided by modularity is the safest and most energy-efficient.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Physics, Applied
Zhiming Ou, Qin Zhang, Shuai Hu, Yanping Dang
Summary: This paper presents a microfluidic system that enables manipulation of particles. The system consists of a microfluidic chip, a driving device, a manipulation dish, and associated accessories. The microfluidic chip integrates a swirl structure with three microchannels, allowing for trapping, rotating, transporting, pairing, and enriching particles with different parameters. The driving device, composed of three push-pull syringe pumps, ensures stability of the swirl flow field during manipulation. Experimental results demonstrate the system's ability to achieve multifunctional and long-term particle manipulation lasting for hours.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
A. Bianco, I Neefjes, D. Alfaouri, H. Vehkamaki, T. Kurten, L. Ahonen, M. Passananti, J. Kangasluoma
Summary: Mass spectrometry is an effective method for identifying and quantifying environmentally relevant molecules, but it cannot distinguish between isomers. This study combines an experimental set-up using a differential mobility analyser with computational ion mobility calculations to successfully identify isomers. The experimental set-up allows for analysis in both the gas and liquid phase, making it a versatile tool for isomer separation.
Article
Environmental Sciences
Haijie Wang, Zitao Yan, Zuojian Zhang, Kui Jiang, Jin Yu, Yong Yang, Bo Yang, Jinian Shu, Zhangqi Yu, Zhiyang Wei
Summary: This study monitored the release of volatile organic compounds (VOCs) during soil disturbance at an abandoned chemical pesticide plant. The results showed an increase in VOC concentrations, which poses a health risk to on-site workers. Additionally, the study identified specific VOCs that contribute to noncarcinogenic and carcinogenic risks, as well as dominant odour contributors during soil disturbance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Christian Ieritano, J. C. Yves Le Blanc, Bradley B. Schneider, Justine R. Bissonnette, Alexander Haack, W. Scott Hopkins
Summary: A workflow was developed to analyze Verapamil and its metabolites, and it was observed that the ionogram of protonated Verapamil had two peaks while the metabolites had only one peak. This was attributed to the protonation at the tertiary amino moiety of Verapamil, which generated a chiral quaternary amine.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Casper Brady, Quinten Debruyne, Ankita Majumder, Brian Goodfellow, Raul Lobo, Ted Calverley, Bingjun Xu
Summary: The study proposes an integrated process for increasing aromatic product yields through methane dehydroaromatization, chemical looping for selective hydrogen oxidation, and subsequent water removal. Validation through a unique multibed recirculating reactor shows potential economic viability under certain circumstances.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Weixuan Zhu, Haotian Ye, Xiong Zou, Yang Yang, Hongguang Dong
Summary: The study optimized the absorption process of multiple gas feeds and proposed pre-allocation of raw gases and multi-feeding operation. The results showed that mass transfer can be significantly strengthened, and the simultaneous optimization of mass and energy can be achieved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Physics, Applied
Peizhou Zhang, Huantong Shi, Yizhu Wang, Cheng Zhang, Ming Xu, Dongsheng Wang, Xingwen Li, Jian Wu, Aici Qiu
Summary: The x-ray spectrum of a flash radiography source based on wire-shorted rod-pinch diode (RPD) is measured and calculated. The RPD is driven by a two-stage linear transformer driver, delivering high current in a short time. The spectrum is reconstructed using a spectrometer and simulated dosimeter responses. The measured spectrum shows an endpoint photon energy of about 130 keV. The radiation characteristics of the RPD are also modeled, and the results show some discrepancies compared to the measured spectrum.
JOURNAL OF APPLIED PHYSICS
(2023)