Article
Environmental Sciences
Michael R. McHale, Amy S. Ludtke, Gregory A. Wetherbee, Douglas A. Burns, Mark A. Nilles, Jason S. Finkelstein
Summary: This study reports trends in wet-precipitation chemistry in response to emissions reductions implemented as part of the Clean Air Act Amendments. The concentrations of sulfate and nitrate showed significant decreasing trends, while ammonium concentrations increased. The trends for sulfate and nitrate were strongest in the beginning of the study period and became weaker in later periods.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Heejeong Kim, Wendell W. Walters, Lizzy Kysela, Meredith G. Hastings
Summary: Atmospheric nitrate and sulfate, major inorganic components of particulate matter, have a significant impact on human health, ecosystem health, and air quality. This study investigated the long-term response of particle chemistry in urban and rural environments in southern New England, an area historically affected by nitrogen oxides (NOx) and sulfur dioxide (SO2) emissions. The results showed that there was a significant urban-rural aerosol chemical composition gradient within a 40 km radius. As anthropogenic influences decreased, the relative contribution of marine and crustal sources increased, affecting the chemistry of fine and coarse particles. Total mass concentrations of chemical species, particularly anthropogenic sulfate and particulate ammonium, decreased dramatically over the ten-year period at both urban and rural sites. However, nitrate concentration increased despite significant reductions in NOx emissions, indicating changes in chemical mechanisms. Furthermore, the decrease in SO2 emissions significantly impacted the atmospheric lifetime and transport distance of particulate ammonium.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Yue Zhang, Yiming Yang, Leiming Zhang, Hongmei Xu, Jian Sun, Tao Wang, Fangxiang Li, Xiaojian Chang, Steven Sai Hang Ho, Bin Li, Bing Wang, Junji Cao, Zhenxing Shen
Summary: Understanding the primary emissions of sulfate, nitrate, and ammonium from solid fuel combustion is important for studying their role in haze formation. Through combustion experiments, the direct emissions of these ions from residential coal combustion and biomass burning were quantified. The emissions varied among different fuel types, with sulfate being the dominant ion. These findings suggest that primary emissions from coal combustion contribute significantly to atmospheric sulfate, especially in winter. The contribution of secondary formation to atmospheric sulfate may be overestimated in current source apportionment studies.
ATMOSPHERIC RESEARCH
(2023)
Article
Environmental Sciences
Yangyang Zhang, Xuejun Liu, Lin Zhang, Aohan Tang, Keith Goulding, Jeffrey L. Jr Jr Collett
Summary: The study reported the impact of the Clean Air Action on the chemical components of atmospheric fine particulate matter in the North China Plain, especially on secondary inorganic aerosols. The results showed significant decreases in PM(2.5) concentration and its chemical components, as well as a reduction in polluted days during the observation period.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Miao Tang, Yu Liu, Jun He, Zhe Wang, Zhijun Wu, Dongsheng Ji
Summary: The study observed a decrease in severe PM2.5 pollution episodes during the heating period in Tianjin from 2014 to 2019, with an increase in concentrations of NO3- and SO42- as air quality deteriorated.
Article
Environmental Sciences
Ziqi Gao, Cesunica E. Ivey, Charles L. Blanchard, Khanh Do, Sang-Mi Lee, Armistead G. Russell
Summary: The chemical composition of PM2.5 has a significant impact on human health and air quality. Assessing and quantifying the impacts of various factors on PM2.5 chemical components can guide effective regulations to improve air quality. Generalized additive models (GAMs) were used to assess the factors affecting different PM2.5 species in the South Coast Air Basin. Results show that precursor emissions have the most significant effect on PM2.5 species production, while meteorological factors also influence PM2.5 composition. In the future, meteorological factors will become more significant in affecting PM2.5 speciation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Chung-Te Chang, Ci-Jian Yang, Ko-Han Huang, Jr-Chuan Huang, Teng-Chiu Lin
Summary: This study quantifies the temporal changes of precipitation acidity and its dominant acidifying agents over the last two decades by synthesizing bulk precipitation chemistry in forest sites from three monitoring networks. Results show distinct declines of sulfate and nitrate depositions and increases of precipitation pH in northeast America and central and east Europe, but not in Asia during 1999 and 2018. The decreases of sulfate and nitrate depositions likely reflect the long-term effort of pollutant emission controls.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agronomy
Geoffrey P. Schortgen, Aaron J. Patton
Summary: Ammonium sulfate can reduce the antagonism of hard water on 2,4-D DMA, but the effect varies between adjuvant and fertilizer rates; It is not recommended to mix KNO3 with 2,4-D applications, as it decreases efficacy; Applicators who want to use AMS as a foliar fertilizer should apply it separately from 2,4-D DMA to prevent potential antagonism.
Article
Agricultural Engineering
Anna Leithaeuser, Mandy Gerber, Roland Span, Sebastian Schwede
Summary: The impact of pyrochar, hydrochar, and lignite addition on the anaerobic digestion of food waste was investigated. The addition of hydrochar significantly increased methane yield, while the addition of pyrochar and lignite had no significant impact. Lignite exhibited a higher NH4+ adsorption capacity, while hydrochar showed a negative NH4+ adsorption capacity.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Aldo Marchetto, David Simpson, Wenche Aas, Hilde Fagerli, Karin Hansen, Gunilla Pihl-Karlsson, Per Erik Karlsson, Michela Rogora, Tanja G. M. Sanders, Andreas Schmitz, Walter Seidling, Anne Thimonier, Svetlana Tsyro, Wim de Vries, Peter Waldner
Summary: Atmospheric nitrogen and sulfur deposition can have both positive and negative effects on forest ecosystems. Accurate estimation of deposition is crucial for assessing and mitigating these impacts. Comparing deposition estimates obtained through modeling with actual measurements can help improve precision and identify areas for improvement in addressing pollutant deposition.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Agronomy
Niharika Rahman, Patrick J. Forrestal
Summary: This study compared the emissions of nitrous oxide (N2O) from different nitrogen fertilizers and found that ammonium fertilizer has lower N2O emissions compared to nitrate fertilizer while maintaining similar grass yield and nitrogen efficiency. The nitrate portion of fertilizers was identified as a key factor in N2O emissions in temperate grassland. This research provides insight into the annual emission factors of ammonium-N and nitrate-N fertilizers.
Article
Plant Sciences
Ezio Nalin de Paulo, Fernando Shintate Galindo, Flavio Henrique Silveira Rabelo, Joaquim Jose Frazao, Jose Lavres
Summary: Nitrification inhibitors, such as DMPP, applied to soil can reduce nitrogen leaching losses and improve agronomic efficiency and nitrogen use efficiency in cotton plants.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Environmental Sciences
Bangfu Huang, Meng Dai, Zhenjing Wen, Wanjun Li, Gaoyong Zi, Liubin Luo, Zhe Shi, Linjing Yang
Summary: This study aims to investigate the influence of ammonium nitrate produced by ozone denitrification on the crystallisation process of ammonium sulfate, a by-product of ammonia desulfurisation. The study used a laser method to examine the impact of ammonium nitrate on the solubility and metastable zone width of ammonium sulfate. Through scanning electron microscopy and X-ray diffraction, the study explored the influence mechanism and found that the addition of ammonium nitrate affected the size, aspect ratio, dissolution, and crystallinity of ammonium sulfate crystals. The findings provide valuable insights for optimizing the crystallisation process and improving the quality of ammonium sulfate in ammonia desulfurisation.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Mohamed Abdel Salam, Mohamed Mokhtar, Soha M. Albukhari, Doaa F. Baamer, Leonardo Palmisano, Ali A. AlHammadi, Mostafa R. Abukhadra
Summary: The Zeolite impeded geopolymer (Z/G) structure is an enhanced adsorbent for PO43- and NH4+ ions, with higher sequestration capacities compared to other adsorbents. The sequestration reactions exhibit Pseudo-Second order kinetic behavior and conform to Langmuir behavior.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Peter Brimblecombe
Summary: Over the past quarter century, Hong Kong's secondary inorganic aerosol has changed, with primary air pollutants decreasing while secondary pollutants show an overall decline. An increase in the NO3-:SO42- ratio is attributed to automotive sources. Insufficient NH3 to neutralize acid from aerosols leaves free acid in the atmosphere.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Chemistry, Physical
Zahra Heidarnezhad, Arash Ghorbani-Choghamarani, Zahra Taherinia
Summary: A new and efficient magnetic mesoporous material was designed and prepared for carbon-carbon cross-coupling reactions. The catalytic activity of this material was stable and reusable, leading to high yields of products under environmentally friendly conditions.
Article
Chemistry, Multidisciplinary
Masoud Mohammadi, Arash Ghorbani-Choghamarani
Summary: The synthesis of a novel nanomagnetic solid acid catalyst and its excellent catalytic activity and reusability were reported.
Article
Multidisciplinary Sciences
Sayed Mohammad Ramish, Arash Ghorbani-Choghamarani, Masoud Mohammadi
Summary: A three-dimensional walnut-like Zn-based MOF microsphere system was designed and synthesized, which exhibited excellent catalytic performance in selectively synthesizing polyhydroquinoline compounds with high yields and short reaction time.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Abbas Rezaei, Arash Ghorbani-Choghamarani, Bahman Tahmasbi
Summary: In this study, a novel nickel metal-organic framework (Ni-DAMP-MOF) was prepared using 4,6-diamino-2-mercaptopyrimidine as a chelating agent. The MOF showed high catalytic activity and selectivity in the synthesis of pyranopyrazoles and oxidation of sulfides.
Article
Energy & Fuels
Ali Naghipour, Arash Ghorbani-Choghamarani, Zahra Taherinia
Summary: In this study, a mesoporous heterogeneous nanocatalyst was successfully synthesized and applied in the esterification process for biodiesel production. The catalyst showed high activity and stability, making it suitable for rapid production of high-quality biodiesel.
Article
Chemistry, Multidisciplinary
Farhad Khanmohammadi-Sarabi, Arash Ghorbani-Choghamarani, Hamid Aghavandi, Mohammad Ali Zolfigol
Summary: In this study, a novel nanomagnetic solid catalyst, ZnFe2O4@SiO2@l-methionine-Zr, was synthesized, which contains zirconium catalytic sites on the surface of ZnFe2O4 MNPs. A new and efficient magnetic material was designed and prepared by immobilizing the l-methionine complex of zirconium on ZnFe2O4@SiO2 nanoparticles. The proposed catalyst was characterized and successfully applied in the synthesis of tetrazoles and polyhydroquinoline derivatives. The use of this heterogeneous nanocatalyst in the mentioned organic reactions offers good results, such as the use of commercially available chemicals, inexpensive starting materials, high reaction efficiencies, easy recovery, and reusability of the catalyst for at least five continuous cycles.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Hamid Aghavandi, Arash Ghorbani-Choghamarani, Masoud Mohammadi
Summary: In this work, a novel Praseodymium complex immobilized onto the SBA-15 channels was synthesized by a simple procedure. The designed catalyst showed excellent performance in the synthesis of bis(pyrazolyl)methane derivatives.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Hamid Aghavandi, Arash Ghorbani-Choghamarani
Summary: In this work, a novel and green nanomagnetic solid acid catalyst, ZnFe2O4@SiO2-SO3H, was synthesized and identified. The catalyst contains sulfuric acid catalytic sites on the surface of ZnFe2O4 magnetic nanoparticles. The synthesized catalyst was accurately characterized by various physicochemical methods. It was found to have excellent catalytic activity for the synthesis of tetrahydrobenzo[b]pyran and DHQZ in ethanol solvent, with yields of 86-97%. The heterogeneous nature of the catalyst was confirmed and its recyclability was demonstrated with negligible loss of activity (97-92%). The amount of sulfamic acid in ZnFe2O4@SiO2-SO3H was determined through back titration.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Multidisciplinary
Zahra Moradi, Arash Ghorbani-Choghamarani
Summary: This research project introduces the preparation of a new mesoporous silica compound (AGC-ZM-2022) using a fatty acid as a template. Palmitic acid, a commonly found saturated fatty acid in animals, plants, and microorganisms, was used as the template to design the mesoporous silica compound. AGC-ZM-2022 was synthesized through the sol-gel method, using tetraethylorthosilicate as the silica source and palmitic acid as the template instead of traditional templates. The physical properties and structure of AGC-ZM-2022 were characterized using various techniques such as FT-IR, SEM, XRD, TEM, and BET.
Article
Chemistry, Physical
Arash Ghorbani-Choghamarani, Zahra Taherinia
Summary: Metal sulfide is a compound semiconductor material that can exist in different forms of metallic ions. Layered transition metal sulfide, such as VS2 and VS4, has attracted significant interest due to its similarity to graphene and its diverse applications in fields including photoelectric devices, electro-catalysis, batteries, and energy storage. This study presents a practical synthetic method to form mesoporous vanadium sulfides with controlled morphologies by adjusting the molar ratio of vanadium acetylacetonate and L-cysteine using a one-step solvothermal method. The catalytic activity of these vanadium sulfides was investigated in several reactions, and their structural properties were characterized using various techniques.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Masoud Mohammadi, Arash Ghorbani-Choghamarani, Noorullah Hussain-Khil
Summary: In this study, a novel chelan complex - L-aspartic acid with copper (II) - is developed on the surface of silica-modified nanomagnetic zirconium ferrite as a new catalytic support. The resulting complex exhibits significant catalytic activity in the synthesis of Pyrano[2,3-c]pyrazoles and 2-amino-3-cyanopyridine derivatives. Mechanistic studies revealed a similar reaction sequence for both reactions, with an additional oxidation step for the synthesis of 2-amino-3-cyanopyridines to pyridines. Various aryl and hetero-aryl aldehydes were employed for the synthesis of six-membered heterocycles.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Multidisciplinary Sciences
Zahra Moradi, Arash Ghorbani-Choghamarani
Summary: In this study, a new type of magnetic mesoporous material (Fe3O4@SiO2@KIT-6@2-ATP@Cu-I) was designed and synthesized, and its application in the synthesis of amides and anilines was investigated. The structure of Fe3O4@SiO2@KIT-6@2-ATP@Cu-I was characterized and identified using various techniques. The synthesized catalyst can be easily removed from the reaction medium using an external magnet and can be reused multiple times.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Organic
Ali Reza Ataee-Najari, Mahmoud Zarei, Hossein Ahmadi, Mohammad Ali Zolfigol, Arash Ghorbani-Choghamarani, Mojtaba Hosseinifard
Summary: In this research, [Zr-UiO-66-CO2H]Br was introduced as a versatile heterogeneous acid catalyst for the ring-opening of epoxides. The study also discusses the appropriate method for designing an active and efficient Bronsted acid site in metal-organic frameworks. [Zr-UiO-66-CO2H]Br was successfully used for the preparation of a-aryloxy alcohols under mild and green conditions.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Zeinab Shirvandi, Arash Ghorbani-Choghamarani, Amin Rostami
Summary: In this study, a new palladium nanocatalyst supported on l-threonine functionalized magnetic mesocellular silica foams was synthesized and characterized. The catalyst showed excellent catalytic activity for Stille, Suzuki, and Heck coupling reactions, and could be recovered and reused for at least five consecutive runs without losing activity by applying an external magnetic field.
Article
Chemistry, Multidisciplinary
Mitra Darabi, Mohsen Nikoorazm, Bahman Tahmasbi, Arash Ghorbani-Choghamarani
Summary: In this study, a novel and green heterogeneous catalyst KIT-6@SMTU@Ni was successfully synthesized via a new method of Ni(ii) complex stabilization on modified mesoporous KIT-6. The synthesized catalyst was characterized using various techniques. It was found to be efficient in the synthesis of 5-substituted 1H-tetrazoles and pyranopyrazoles, with high yields and reasonable reaction times. The catalyst also exhibited excellent reusability and had other advantages such as using green solvents and commercially available materials.
