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Nutrition: Sodium

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Total 421 results found since Jan 2013.

Transformation of 2, 4, 6-trinitrotoluene by Stenotrophomonas strain SG1 under aerobic and anaerobic conditions
Chemosphere. 2022 Oct 31:137085. doi: 10.1016/j.chemosphere.2022.137085. Online ahead of print.ABSTRACTTNT, or 2,4,6-trinitrotoluene, is a common explosive that can contaminate soil and groundwater in production sites, military training areas, and disposal locations. The compound is highly toxic; therefore, there is an urgent need to rehabilitate the impacted environments. Harnessing the microbial ability to biodegrade TNT into environmentally harmless compound(s) is one approach to remediating contaminated sites. In our study, we report on the genomic and metabolic ability of Stenotrophomonas strain SG1 to degrade TNT und...
Source: Chemosphere - November 3, 2022 Category: Chemistry Authors: Swati Gupta Shikhar S Goel Hagar Siebner Zeev Ronen Gurunath Ramanathan Source Type: research

Insight into the microplastics release from disposable face mask: Simulated environment and removal strategy
Chemosphere. 2022 Oct 6:136748. doi: 10.1016/j.chemosphere.2022.136748. Online ahead of print.ABSTRACTThe fight against the COVID-19 epidemic significantly raises the global demand for personal protective equipment, especially disposable face masks (DFMs). The discarded DFMs may become a potential source of microplastics (MPs), which has attracted much attention. In this work, we identified the detailed source of MPs released from DFMs with laser direct infrared spectroscopy. Polypropylene (PP) and polyurethane (PU) accounted for 24.5% and 57.1% of released MPs, respectively. The melt-blown fabric was a dominant MPs source...
Source: Chemosphere - October 9, 2022 Category: Chemistry Authors: Hongru Jiang Jiming Su Yingshuang Zhang Kai Bian Zhiyi Wang Hui Wang Chongqing Wang Source Type: research

Cesium ion-exchange resin using sodium dodecylbenzenesulfonate for binding to Prussian blue.
Abstract Radioactive Cs ions are extremely harmful to the human body, causing cancers and other diseases. Treatments were performed on radioactive Cs present in wastewater after use in industrial or medical fields. Prussian blue (PB) has been widely used for the removal of Cs ions from water but its colloidal structure hinders reuse, making it problematic for practical use. To solve this problem, we used a commercial macroporous polymer resin as a PB matrix. To provide an efficient anchor for PB, the surface of the polymer resin was decorated with sodium dodecylbenzenesulfonate to produce a negatively charged surf...
Source: Chemosphere - February 15, 2020 Category: Chemistry Authors: Cho E, Lee JJ, Lee BS, Lee KW, Yeom B, Lee TS Tags: Chemosphere Source Type: research

Hydrous manganese dioxide modified poly(sodium acrylate) hydrogel composite as a novel adsorbent for enhanced removal of tetracycline and lead from water
In this study, hydrous manganese dioxide (HMO) modified poly(sodium acrylate) (PSA) hydrogel was produced for the first time to remove tetracycline(TC) and lead(Pb(II)) from water. The as-prepared composite was characterized using various techniques, such as SEM-EDS, FTIR, XRD, BET, and XPS, to elucidate the successful loading of HMO and analyze subsequent sorption mechanisms. Different influencing parameters such as adsorbent dose, initial concentration of adsorbates, reaction time, solution pH, and temperature were also investigated. The adsorption kinetic studies of both TC and Pb(II) removal indicated that equilibrium ...
Source: Chemosphere - February 16, 2021 Category: Chemistry Authors: Mengist Minale Zaoli Gu Awoke Guadie Yuan Li Yuan Wang Yuan Meng Xuejiang Wang Source Type: research

Kinetic modelling of high turbid water flocculation using native and surface functionalized coagulants prepared from shed-leaves of Avicennia marina plants
Chemosphere. 2021 Feb 8;272:129894. doi: 10.1016/j.chemosphere.2021.129894. Online ahead of print.ABSTRACTCoagulation performance of shed-leaves of Avicennia marina plants collected from Alang coastline, Gujarat (India) was scrutinized for the treatment of mud and starch water suspensions. For which, native, hydrochloric acid, sodium hydroxide and sodium chloride treated A. marina shed-leaves were processed with minimum environmental impact. Experiments were accomplished for the concentration of water suspensions (10-50 g/L) at the range of pH 7.0-8.0. The performances of these coagulants were assessed in terms of reductio...
Source: Chemosphere - February 15, 2021 Category: Chemistry Authors: Aruna Kanwar Naruka Subburaj Suganya Ponnusamy Senthil Kumar Chanchpara Amit Katakpara Ankita Dhruv Bhatt Madhava Anil Kumar Source Type: research

Effects of cations on biofilm formation and characteristics in integrated fixed film activated sludge process at different carbon and nitrogen loadings
In this study, the effects of cations indicated as the monovalent to divalent cations (M/D) ratio on the biofilm formation and characteristics, and on the IFAS performances for carbon and ammonium removals were evaluated. The experiments were conducted in three IFAS systems feeding with the same wastewater but different M/D ratios and two carbon and nitrogen loadings. The findings revealed that high monovalent with low divalent cations at the M/D ratios higher than 2.0 produced excessive polysaccharides in EPS resulting in high viscosity of activated sludge flocs causing viscous bulking with high SVI values, decreasing the...
Source: Chemosphere - February 24, 2021 Category: Chemistry Authors: Tongchai Sriwiriyarat Sinchai Kuhakaew Source Type: research

Pore volume upgrade of biochar from spent coffee grounds by sodium bicarbonate during torrefaction
This study has successfully produced mesoporous biochar at low temperatures to fulfill "3E", namely, energy (biofuel), environment (biowaste reuse solid waste), and circular economy (bioadsorbent).PMID:33639554 | DOI:10.1016/j.chemosphere.2021.129999
Source: Chemosphere - February 27, 2021 Category: Chemistry Authors: Wei-Hsin Chen Jyun-Ting Du Kuan-Ting Lee Hwai Chyuan Ong Young-Kwon Park Chien-Chang Huang Source Type: research

Highly efficient and selectivity removal of heavy metal ions using single-layer Na < sub > x < /sub > K < sub > y < /sub > MnO < sub > 2 < /sub > nanosheet: A combination of experimental and theoretical study
Chemosphere. 2021 Feb 22;275:130068. doi: 10.1016/j.chemosphere.2021.130068. Online ahead of print.ABSTRACTManganese oxides (MnO2) are widely applied in heavy metal ions removal due to their low-cost, environmental-friendly and biocompatibility. However, the adsorption capacity of MnO2 need to be further improved to satisfy the demand of practical application. Herein, a highly dispersed single layer NaxKyMnO2 nanosheet was synthesized by a facile wet-chemical method with sodium dodecyl sulfonate as surfactant. The high surface specific area, excellent dispersibility and abundant oxygen vacancies endowed NaxKyMnO2 nanosheet...
Source: Chemosphere - March 7, 2021 Category: Chemistry Authors: Ruichao Peng Hao Li Yongting Chen Feipeng Ren Fengyu Tian Yawei Gu Honglei Zhang Xiurong Huang Source Type: research

Extraction of extracellular polymeric substances from dam lake fresh sediments derived from crystalline bedrock
Chemosphere. 2021 Feb 26;275:130103. doi: 10.1016/j.chemosphere.2021.130103. Online ahead of print.ABSTRACTExtracellular polymeric substances (EPS) produced by microorganisms have a key role in the sedimentary compartment, e.g. promoting aggregation and biostabilisation of sediment particles and increasing chemical reactivity at the water/sediment interface. Therefore, proper extraction methods are needed to study this EPS matrix. In this work, nine extraction methods based on physical (centrifugation, sonication), chemical (sodium hydroxide, sodium pyrophosphate, sodium tetraborate), and both chemical and physical (cation...
Source: Chemosphere - March 7, 2021 Category: Chemistry Authors: Thibaut Le Guet Marilia Camotti Bastos Valentin Robin Isabelle Bourven Gilles Guibaud Source Type: research

Impact of ambient relative humidity and acidity on chemical composition evolution for malonic acid/calcium nitrate mixed particles
Chemosphere. 2021 Mar 1;276:130140. doi: 10.1016/j.chemosphere.2021.130140. Online ahead of print.ABSTRACTThe chemical compositions in atmospheric aerosols, which often evolve with environmental factors, have significant impact on climate and human health, while our fundamental understanding of chemical process is limited owing to their sensitive to atmospheric conditions. pH and RH are critical chemical factors of aerosols, impacting reaction pathways and kinetics that ultimately govern final components in particles. Herein, we monitored the chemical composition in internally mixed malonic acid/calcium nitrate with the mo...
Source: Chemosphere - March 10, 2021 Category: Chemistry Authors: Chun-Yun Du Wei Wang Na Wang Shu-Feng Pang Yun-Hong Zhang Source Type: research

Hydrolysis of FTOH precursors, a simple method to account for some of the unknown PFAS
In this report we suggest hydrolysis of precursors, as a complementary method to account for the unknown PFAS. It was shown here that hydrolysis allows to preserve structural information on the perlfuorinated parts of the precursors, which can be an advantage for the purpose of accurate risk assessment or source identification. A convenient procedure for hydrolysis with 4% sodium hydroxide in water-methanol mixture (1:9) at 60 °C for 16 h was shown to convert model substances - FTOH acrylate, methacrylate and isobutyrate esters as well as FTOH phenylcarbamate to free FTOHs. Analysis of extracts of textile samples with pre...
Source: Chemosphere - March 18, 2021 Category: Chemistry Authors: Vladimir A Nikiforov Source Type: research