Article
Environmental Sciences
Huan Wang, Yudao Chen, Wei Meng, Yaping Jiang, Yaping Cheng
Summary: This study investigated the batch experiment with different aquifer materials using persulfate as a chemical oxidant to oxidize organic contaminants. The results showed that BTEX could be preferentially removed with the addition of persulfate, while ethanol could compete with sulfate radical and potentially inhibit the biodegradation of BTEX.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Xin Shang, Guodong Liu, Xiong Su, Yanqiang Huang, Tao Zhang
Summary: This study presents a successful strategy for the conversion of CO2 into valuable aromatics, such as toluene and xylene, using a composite catalyst containing metal oxides and Zn-modified zeolites. The research demonstrates the crucial role of appropriate acid properties in the coupling reaction, which can be controlled by the introduction of Zn. The enhanced coupling effect leads to improved reactant conversion and selectivity of specific aromatics products.
Article
Chemistry, Physical
Xin Shang, Guodong Liu, Xiong Su, Yanqiang Huang, Tao Zhang
Summary: The study utilizes a composite catalyst containing ZnZrOx and Zn/ZSM-5 to selectively synthesize toluene and xylene in the presence of benzene, achieving high selectivity in the chemical reaction.
Article
Microbiology
Sinchan Banerjee, Anna Bedics, Erika Toth, Balazs Kriszt, Andre R. Soares, Karoly Boka, Andras Tancsics
Summary: Members of the genus Pseudomonas are widely distributed in hydrocarbon contaminated environments due to their ability to degrade various petroleum hydrocarbons. In this study, a novel bacterium designated as MAP12(T) was isolated, which showed efficient degradation of xylene under both aerobic and microaerobic conditions. The analysis of 16S rRNA gene sequence and genome confirmed that MAP12(T) represents a new species of the genus Pseudomonas with distinct characteristics.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Tong Shuai Wang, Bo Song, Qing Hua Sun, Yong Xin Lin, Yuan Sun, Pin Sun, Xiao Dong Jia, William W. Au, Can Hua Mei, Zhao Lin Xia
Summary: This study conducted a retrospective and systematic occupational health risk assessment of enterprises in Shanghai, China that used BTX. The results showed that workers exposed to BTX still face excessive health risks, especially gluers and inkers. Additional control measures recommended by OHRA guidelines are essential to reduce worker exposure levels.
BIOMEDICAL AND ENVIRONMENTAL SCIENCES
(2021)
Article
Chemistry, Physical
Tonglu Lu, Chunxia Zhang, Fangyuan Du, Changsen Zhang, Ruiqin Zhang, Panpan Liu, Juexiu Li
Summary: The synchronous conversion behavior of benzene, toluene, and xylene (BTX) over MnO2 nanowire catalyst was studied. Xylene was found to have competitive adsorption, leading to its preferential conversion and inhibiting the oxidation of toluene and benzene. Doping MnO2 with K+, Na+, and Ca2+ enhanced its ability to oxidize individual VOCs but did not change the conversion mechanism of mixed BTX. K-MnO2 exhibited superior performance with 90% conversion over a long-term operation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Public, Environmental & Occupational Health
Amirreza Abouee-Mehrizi, Zahra Soltanpour, Yousef Mohammadian, Akbar Sokouti, Sajjad Barzegar
Summary: This study assessed exposure to BTEX and their carcinogenic and non-carcinogenic risks in shoe-industry-related workplaces. The concentrations of benzene and toluene exceeded the threshold limit value, and both carcinogenic and non-carcinogenic risks were considerable in all workplaces.
TOXICOLOGY AND INDUSTRIAL HEALTH
(2023)
Article
Optics
G. L. Sharipov, A. M. Abdrakhmanov, B. M. Gareev, A. A. Tukhbatullin
Summary: This study investigates the spectra of glow emitted during the sonolysis of benzene, toluene, and p-xylene solutions in ethylene glycol, revealing different luminescence bands at varying concentrations. Higher concentrations quench the luminescence, resulting in a continuum spectrum. The findings suggest the penetration of luminophores molecules into the moving and deformed bubble, as well as their collisional excitation in the nonequilibrium intrabubble plasma.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Applied
Tatinaidu Kella, Debaprasad Shee
Summary: This study investigates the direct conversion of n-butanol to aromatics using Zn-deposited HZSM5 catalysts, showing that the presence of Zn enhances the selectivities of aromatics and BTEX. Increasing temperature and decreasing WHSV also contribute to higher selectivities, but high pressure has a adverse effect on the aromatics selectivity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jamal Mehralipour, Ahmad Jonidi Jafari, Mitra Gholami, Ali Esrafili, Majid Kermani
Summary: In this study, toluene and ethylbenzene were efficiently degraded using the photocatalytic-proxone process with BiOI@NH2-MIL125(Ti)/Zeolite nanocomposite. The optimal operating conditions for degradation were found to be a flow rate of 0.1 L min(-1), ozone concentration of 0.3 mg min(-1), hydrogen peroxide concentration of 150 ppm, relative humidity of 45%, and initial pollutants concentration of 50 ppmv. The degradation efficiency remained above 95% for both pollutants, and the nanocomposite showed good stability over 180 min. Oxygen gas promoted the removal of pollutants, while nitrogen gas had an inhibitory effect. Various organic intermediates were identified during the oxidation process. Evaluation of the process resulted in a score of 8 out of 10.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Neslihan Kaya Kinayturk, Taner Kalayci, Belgin Tunali, Deniz Turkoz Altug
Summary: In this study, Benzene molecule was used as the starting point to construct Benzene-like molecules by adding methyl and amine groups, and the changes in physical properties were investigated. The study obtained HOMO-LUMO, MEP, and character tables for these organic molecules, and analyzed the effect of group symmetry. Density functional theory calculations were used to obtain vibrational and electronic spectra, and optimized geometries for four ring molecules. The study concluded the symmetries of Benzene, Toluene, p-Xylene, and p-Toluidine as D6h, C2v, D2h, and C2v respectively. It was found that the lowest C1-C2 bond was in Benzene and p-Xylene, while the highest C1-C2 bond was in Toluene. The study also identified changes in vibrational frequencies with the addition of subgroups, and determined the interaction sites of each molecule through various quantum chemical properties.
Article
Chemistry, Physical
Shu Ren, Chao Tian, Yinghong Yue, Wei Zou, Weiming Hua, Zi Gao
Summary: Sheet-like ZSM-5 zeolites with varied b-axis thicknesses were prepared and studied for benzene alkylation with methanol. The catalysts exhibited comparable benzene conversions and similar textural and acidic properties. Decreasing the b-axis length led to an obvious increase in the selectivity to toluene and xylene, suggesting an enhanced diffusion property of ZSM-5 zeolite.
Article
Engineering, Environmental
Zhuowei Cheng, Junjie Wang, Dongzhi Chen, Jianmeng Chen, Lining Wang, Jiexu Ye, Jianming Yu
Summary: The study demonstrates that the combination of wet scrubber and thermally activated persulfate can efficiently remove p-xylene, with a maximum removal efficiency of 78.5%. By adjusting the activation temperature and PS dosage, as well as controlling the gas flow rate and absorption solution pH, the removal efficiency of p-xylene can be optimized.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Xin Shang, Hongying Zhuo, Qiao Han, Xiaofeng Yang, Guangjin Hou, Guodong Liu, Xiong Su, Yanqiang Huang, Tao Zhang
Summary: A highly active composite catalyst (ZZO/Z5-SG) of ZnZrO and HZSM-5 was reported for xylene synthesis from CO2 hydrogenation in the presence of toluene, achieving a xylene selectivity of 86.5% and CO2 conversion of 10.5%. The catalyst exhibited a remarkably high space time yield of xylene (215 mg g(cat)(-1) h(-1)), surpassing most reported catalysts for CO2 hydrogenation. The enhanced performance of ZZO/Z5-SG could be attributed to high dispersion and abundant oxygen vacancies of ZZO for CO2 adsorption, close interaction between the two components for more feasible hydrogen activation and transfer, and enhanced stability of the formate intermediate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Ines C. Weber, Pascal Ruedi, Petr Sot, Andreas T. Guntner, Sotiris E. Pratsinis
Summary: This study introduces a compact, battery-powered device for detecting benzene concentration in gas mixtures, with high selectivity and sensitivity to various organic compounds. The device can accurately and rapidly detect benzene in indoor air, meeting the strictest legal limits while showing good agreement with mass spectrometry results.
Article
Food Science & Technology
Saksit Susakate, Saranya Poapolathep, Chanat Chokejaroenrat, Phanwimol Tanhan, Jana Hajslova, Mario Giorgi, Kanista Saimek, Zhaowei Zhang, Amnart Poapolathep
JOURNAL OF FOOD AND DRUG ANALYSIS
(2019)
Article
Agricultural Engineering
Chanat Chokejaroenrat, Chainarong Sakulthaew, Athaphon Angkaew, Tunlawit Satapanajaru, Amnart Poapolathep, Tharisara Chirasatienpon
AQUACULTURAL ENGINEERING
(2019)
Article
Pharmacology & Pharmacy
Saranya Poapolathep, Mario Giorgi, Narongsak Chaiyabutr, Chanat Chokejaroenrat, Narumol Klangkaew, Napasorn Phaochoosak, Tara Wongwaipairote, Amnart Poapolathep
JOURNAL OF VETERINARY PHARMACOLOGY AND THERAPEUTICS
(2020)
Article
Environmental Sciences
Chainarong Sakulthaew, Chanat Chokejaroenrat, Tunlawit Satapanajaru, Tharisara Chirasatienpon, Athaphon Angkaew
WATER AIR AND SOIL POLLUTION
(2020)
Article
Environmental Sciences
Chanat Chokejaroenrat, Apichon Watcharenwong, Chainarong Sakulthaor, Akira Rittirat
WATER AIR AND SOIL POLLUTION
(2020)
Article
Energy & Fuels
Saksit Imman, Torpong Kreetachat, Punjarat Khongchamnan, Navadol Laosiripojana, Verawat Champreda, Kowit Suwannahong, Chainarong Sakulthaew, Chanat Chokejaroenrat, Nopparat Suriyachai
Summary: In this study, acid-catalyzed pretreatment of pineapple leaves using liquid hot water (LHW) technique was optimized with the central composite-based response surface methodology (RSM). The optimal pretreatment conditions were identified to maximize glucose yield, reaching 91% at specific sulfuric acid concentration and temperature. It was found that high solid loading improved productivity, but the highest theoretical ethanol yield was obtained at 5% solid loading. Analysis of physiochemical characteristics of the pretreated pineapple leaves showed enhanced enzyme digestibility and fermentability for ethanol production.
Article
Chemistry, Multidisciplinary
Apiladda Pattanateeradetch, Chainarong Sakulthaew, Athaphon Angkaew, Samak Sutjarit, Thapanee Poompoung, Yao-Tung Lin, Clifford E. Harris, Steve Comfort, Chanat Chokejaroenrat
Summary: The use of parabens in personal care products can result in their leakage into water bodies, especially in public swimming pools with insufficient water treatment. Researchers developed a catalytic ozonation system using nanomaterials that could enhance ozone efficiency and minimize ozone supply while ensuring the treated water was environmentally acceptable.
Article
Infectious Diseases
Chanat Chokejaroenrat, Chainarong Sakulthaew, Khomson Satchasataporn, Daniel D. Snow, Tarik E. Ali, Mohammed A. Assiri, Apichon Watcharenwong, Saksit Imman, Nopparat Suriyachai, Torpong Kreetachat
Summary: This study investigated the adsorption capabilities of carbonized leonardite (cLND) for removing antibiotics from water, showing potential for efficient removal. The results demonstrated that cLND samples prepared at 450°C and 550°C effectively adsorbed sulfamethoxazole and enrofloxacin, retaining the antibiotics and serving as a low-cost adsorbent.
Article
Environmental Sciences
Athaphon Angkaew, Chainarong Sakulthaew, Matura Nimtim, Saksit Imman, Tunlawit Satapanajaru, Nopparat Suriyachai, Torpong Kreetachat, Steve Comfort, Chanat Chokejaroenrat
Summary: There is increasing interest in using different types of nanoparticle catalysts to activate H2O2 with light for the treatment of organic contaminant and wastewater. Researchers have successfully synthesized a magnetically recoverable Cu0.5Mn0.5Fe2O4 nanoparticle and demonstrated its outstanding catalytic performance in removing organic contaminants. The study also identified the active radical species involved in the degradation process, and showed the excellent catalytic ability of the Cu0.5Mn0.5Fe2O4 nanoparticles in real wastewater.
Article
Environmental Sciences
Chanat Chokejaroenrat, Athaphon Angkaew, Kanidrawee Techauay, Tharisara Chirasatienpon, Saksit Imman, Chanakarn Sakulthaew, Nopparat Suriyachai, Torpong Kreetachat, Chainarong Sakulthaew
Summary: Herbicide use is crucial for crop yield increase, but it has led to groundwater contamination in some countries. This study aimed to develop a slow-release reductant for treating herbicide-contaminated groundwater. We found that slow-release Fe-0 extended degradation time and improved herbicide removal, especially for the herbicide alachlor.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Infectious Diseases
Chainarong Sakulthaew, Chanat Chokejaroenrat, Sidaporn Panya, Apisit Songsasen, Kitipong Poomipuen, Saksit Imman, Nopparat Suriyachai, Torpong Kreetachat, Steve Comfort
Summary: Copious use of antibiotics in aquaculture farming systems has led to contamination of surface water in certain countries. Our goal was to develop a slow-release oxidant that could be used on-site to decrease antibiotic concentrations in discharges from aquaculture lagoons. We achieved this by creating a slow-release permanganate (SR-MnO4-) composed of a biodegradable wax and a phosphate-based dispersing agent. Kinetic experiments confirmed the first-order reaction between antibiotic and MnO4-, with second-order rates ranging from 0.056 to 0.128 s(-1) M-1. Batch experiments indicated that solution pH, water matrices, and humic acids affected the degradation efficiency of sulfadimethoxine (SDM). A mixture of KMnO4/beeswax/paraffin (SRB) at a ratio of 11.5:4:1 (w/w) demonstrated better biodegradability and continual release of MnO4-, although MnO2 formation altered release patterns. The addition of tetrapotassium pyrophosphate (TKPP) delayed MnO2 aggregation and increased SDM removal efficiency to 90%. The release data of MnO4- fit the Siepmann-Peppas model in the long term (t < 48 d), while the Higuchi model provided a better fit for shorter timeframes (t < 8 d). Our flow-through discharge tank system, using SRB with TKPP, consistently reduced SDM concentration in both DI water and lagoon wastewater. These findings support the effectiveness of SRB with TKPP as a composite for treating antibiotic residues in aquaculture discharge water.
Article
Infectious Diseases
Chanat Chokejaroenrat, Chainarong Sakulthaew, Athaphon Angkaew, Apiladda Pattanateeradetch, Wuttinun Raksajit, Kanokwan Teingtham, Piyaporn Phansak, Pawee Klongvessa, Daniel D. Snow, Clifford E. Harris, Steve D. Comfort
Summary: The amount of antibiotics and personal care products entering local sewage systems and natural waters is increasing, raising concerns about human health effects. A Cu0.5Mn0.5Fe2O4 nanoparticle adsorptive photocatalyst was developed to remove paraben and oxytetracycline (OTC). Both adsorption and photocatalytic reactions occurred simultaneously with the photocatalyst, and OTC degradation involved multiple reactions. The nanoparticles showed remarkable performance in degrading the tested antibiotics and personal care products.
Article
Chemistry, Multidisciplinary
Kitipong Poomipuen, Chainarong Sakulthaew, Chanat Chokejaroenrat, Athaphon Angkaew, Kanidrawee Techauay, Thapanee Poompoung, Kanokwan Teingtham, Piyaporn Phansak, Piyangkun Lueangjaroenkit, Daniel D. Snow
Summary: In this study, manganese spinel ferrite and graphitic carbon nitride were successfully used as an activator for peroxymonosulfate (PMS) under visible light irradiation to remove hormone-contaminated water. The nanocomposites enhanced the performance by improving the crystallinity, reducing particle agglomeration, amplifying magnetism, improving recyclability, and increasing active surface area. The study also identified the degradation byproducts and possible pathways of the hormones.
Article
Engineering, Environmental
A. Angkaew, C. Sakulthaew, T. Satapanajaru, A. Poapolathep, C. Chokejaroenrat
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
