Current Green Chemistry最新文献

{"title":"Influence of Eco-friendly Pretreatment of Cellulose Acetate Fabric with Laccase Enzyme on the Textile Properties, Dye Adsorption Isotherms, and Thermodynamic Parameters","authors":"A. Zolriasatein","doi":"10.2174/2213346110666221201163554","DOIUrl":"https://doi.org/10.2174/2213346110666221201163554","url":null,"abstract":"\u0000\u0000Deacetylation of cellulose acetate restores hydroxyl groups on the surface of fibers and improves hydrophilicity. From an environmental point of view, the conventional deacetylation process involves alkalinity and large effluent volume. The goal of this work is to introduce a new eco-friendly bio-treatment process.\u0000\u0000\u0000\u0000In this study, cellulose acetate fabrics were bio-treated with laccase enzyme. Then, the untreated and bio-treated fabrics were dyed with direct and dispersed dyes. Laccase pretreatment improved color strength (16%) and crocking durability. After bio-treatment, the bending rigidity decreased for the warp (17.8) and weft (10.8) directions. The Freundlich model was the best model to describe the adsorption of direct dye onto the untreated fabric. In contrast, the Langmuir model better described the adsorption behavior of bio-treated fabric.\u0000\u0000\u0000\u0000Nernst model was suitable for dispersed dye adsorption. The partition coefficient was increased after laccase treatment. Thermodynamic analysis showed that the dye sorption was endothermic and nonspontaneous.\u0000\u0000\u0000\u0000It was also found that bio-treated fabrics require less external energy. All performed experiments approved the efficiency of the deacetylation process, which led to an improvement in dyeing properties.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46278667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamics, Kinetics and Isotherms Studies for Sorption of Direct and Disperse Dyes onto Eco-friendly pre-treated Cellulose acetate Fabric Using Ultraviolet Irradiation","authors":"A. Zolriasatein","doi":"10.2174/2213346110666221117143316","DOIUrl":"https://doi.org/10.2174/2213346110666221117143316","url":null,"abstract":"\u0000\u0000Owing to the restoration of hydroxyl groups, cellulose acetate fibers can be dyed with direct dyes. There are some drawbacks in the conventional deacetylation process of cellulose acetate from environmental point of view\u0000\u0000\u0000\u0000This process involves high temperature, alkalinity and large volume of effluent. The goal of this work is to improve the dyeing properties of cellulose acetate fabric using an eco-friendly treatment process. In this paper, cellulose acetate fabric was treated with ultraviolet light (UVB) at an air pressure of 1 atm to improve dyeability. Then, the untreated and UV treated fabrics were dyed with direct and dispersed dyes. UV treated cellulose acetate fabric showed higher dye adsorption compare to that of untreated cellulose acetate fabric. Five adsorption isotherm models including sold solution, Langmuir, Freundlich, Temkin and BET were applied to determine the adsorption behavior. At all temperatures studied, experimental data were better fitted with the Freundlich and Nernst models for direct and disperse dyes respectively. Thermodynamic parameters such as change in free energy (∆G0), the enthalpy (∆H0), and the entropy (∆S0) were also evaluated.\u0000\u0000\u0000\u0000The calculated thermodynamic values showed that the adsorption of these dyes onto the cellulose acetate fabric was a physical adsorption process and endothermic in nature. These data also implied that the adsorption of direct dye onto cellulose acetate fabric was spontaneous at the experimental temperature range and adsorption of disperse dyes can be spontaneous at higher temperatures. Moreover, the ∆G0 values for the adsorption of disperse dyes onto the UV-treated fabrics were less than those for untreated fabrics suggesting that UV treated fabrics require less external energy.\u0000\u0000\u0000\u0000Among the kinetic models studied, it was found that the pseudo second-order kinetic model was the best model to describe the dye sorption process on the UV treated and untreated cellulose acetate fabrics. The UV treatment led to an improvement in the boundary layer diffusion effect.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46418696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent Progress on the Application of the Polyaniline-Pd Catalysts for C-C Cross-coupling Bond Forming Reactions: Trend and Future Analysis","authors":"Moumita Roy","doi":"10.2174/2213346110666221117162351","DOIUrl":"https://doi.org/10.2174/2213346110666221117162351","url":null,"abstract":"\u0000\u0000In this review recent progress on the application of the polyaniline supported palladium catalysts in different organic transformations focusing on different C-C bond forming reactions such as Suzuki coupling, Heck reactions, oxidative Heck coupling, Ullmann coupling, Sonogashira and related chemistry. Effect of catalyst preparation, characteristic of the support and supported palladium species on the outcome of the catalyst efficiency are also highlighted. Finally, the emerging trend is summarized for the future of this unique modular catalytic system.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44093447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Review on the Various Mechanisms of Green Synthesis of Metal Nanoparticles for Biomedical Applications","authors":"Deepti Verma, A. Prabhakar, S. Jaiswal, Nimisha Roy, Amar Dhwaj","doi":"10.2174/2213346110666221028143409","DOIUrl":"https://doi.org/10.2174/2213346110666221028143409","url":null,"abstract":"\u0000\u0000Due to the hazardous effects of chemicals used, Green chemistry replaces the conventional techniques involved in nanotechnology. Green chemistry is the branch of science dealing with microbiology, phytology, and chemical engineering with the development of products by manipulating these three domains. Green synthesis is an interdisciplinary domain that relies on the use of non-toxic, bio-safe reagents, which are eco-friendly and safe to use in bio-nanotechnology and provide environmental benefits as an option other than the conventional physical and chemical methods for developing technology. This article will critically present the various approaches and methods for nanoparticle synthesis using microorganisms like bacteria, fungi, yeasts, archaea, viruses, algae, etc. By optimizing with laboratory conditions, nanoparticles of different range of physical characteristics can be synthesized. Nanoparticles with well-defined properties have been reported to be synthesized by green chemistry, for many biomedical applications. Green synthesis of nanoparticles is non-toxic, eco-friendly, and compatible to be used for medicals procedure, and the rate of nanoparticle formation and their size could be regulated by various controlling factors like pH, temperature, concentration, time exposure, etc. The use of microbes for nanoparticle synthesis can be divided broadly into intracellular and extracellular based on their being produced from the extracts of microorganisms, which can be employed either as reducing agents or protective agents for the synthesis either extracellular or intracellular in the presence of enzymes generated by cells. This review aims to summarize nanoparticles of Au, P, Ag, Pt, CdS, Pt ZnO etc via as the primary focus. Additionally, a short glimpse often hybrid chemical-biological methods have also been presented.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45821516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Curcumin-loaded hydrotropic solid dispersion topical gel development and evaluation: A greener approach towards transdermal delivery of drugs","authors":"Devika Tripathi, Sangeeta Mishra, A. Rai, Jagannath Sahoo, D. Sharma, Yadvendra Singh","doi":"10.2174/2213346110666221020121020","DOIUrl":"https://doi.org/10.2174/2213346110666221020121020","url":null,"abstract":"\u0000\u0000Curcumin's poor water solubility still presents a challenge. Because of Curcumin's instability in solubilizing solvents, using a non-sustainable solvent and dissolved oxygen in the Solution might be the problem. Thus, considering all facts, looking for a promising alternative solvent medium is in need. Indeed, a solution of hydrotropic agent has been assessed recently. Hydrotropic agents are the best replacements for organic solvents. These are eco-friendly, safe, and non-toxic agents. Hence, the presented research focuses on improving the solubility of Curcumin through a hydrotropic solid dispersion approach. Amazingly, Curcumin showed a significant solubility enhancement in sodium salicylate hydrotropic Solution. Sodium salicylate hydrotrope ensured the stability of Curcumin in Solution, maintained homogeneity, and exhibited antioxidant properties. Hydrotropy combined with the solid dispersion technique is a simple and effective way to improve the bioavailability of Curcumin. Hydrotropic solid dispersion loaded curcumin topical gel was developed to achieve transdermal delivery of Curcumin. Solid dispersion was prepared by solvent evaporation method and evaluated for in-vitro performance. In-vitro drug dissolution, drug content, FTIR, and XRD were carried out for the prepared HSD.\u0000\u0000\u0000\u0000The selected HSD (1:4) was loaded into a topical gel by dispersion method, and in-vitro parameters like drug content, Spreadability, pH, rate of drug dissolution, and drug content were performed.\u0000\u0000\u0000\u0000The solubility study has substantially enhanced the solubility of Curcumin in a 2M sodium salicylate hydrotropic solution. Sodium salicylate was compatible with formulating the solid dispersion. Hydrotropic solid dispersion was successfully prepared in 1:4 ratios. XRD results have shown the amorphous nature of Curcumin in the presence of sodium benzoate. The dissolution studies have shown improved release compared to pure Curcumin and PM (1:4). The prepared HSD was then incorporated into a gel by dispersion method using carbopol 934 and hydroxypropyl methylcellulose as a gelling agent. The Cur-HSD gel was homogeneous and transparent in appearance.\u0000\u0000\u0000\u0000The gel showed excellent Spreadability and drug content of 94.2 with 90.21% of percent drug release for 120 min and showed improved release in the presence of hydrotrope for improved topical delivery of Curcumin.\u0000\u0000\u0000\u0000Thus, to enhance the topical delivery of poorly soluble phytoconstituents, hydrotropes are suggested as a greener approach and to be applied for other poorly soluble phytoconstituents.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41257394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Metal-Free Regioselective Deuteration of 2-Methylquinolin-8-ol and 2,5-Dimethylquinolin-8-ol, Spectroscopic and Computational Studies","authors":"J. Nycz, Marcin Szala, J. Małecki, M. Książek, J. Kusz","doi":"10.2174/2213346110666221019142941","DOIUrl":"https://doi.org/10.2174/2213346110666221019142941","url":null,"abstract":"\u0000\u0000Introducing deuterium to a molecule is of interest for a wide variety of research, including investigation of reaction mechanisms or kinetics, analysis of drug metabolism, structural elucidation of molecules, and syntheses of isotopically labeled materials used for NMR spectroscopy and medicinal research.\u0000\u0000\u0000\u0000The transition-metal-free regioselective deuteration of 2-methylquinolin-8-ol (1a) and 2,5-dimethylquinolin-8-ol (2a) with ambient reaction conditions and low-cost reagents is described in the paper.\u0000\u0000\u0000\u0000Regioselective H/D isotope exchange has been presented by combining the following techniques 1H NMR, 13C NMR, GC-MS, and X-ray crystallography. The molecular orbitals of the deuterated molecule 1a have been calculated by density functional theory (DFT) to provide an elucidation of the isotope exchange.\u0000\u0000\u0000\u0000The metal-free regioselective green deuteration based on modified Skraup-Doebner-Von Miller synthesis and water-d2 KOD solution or water-d2 D2SO4 solution of hydroxyquinolines was elaborated.\u0000\u0000\u0000\u0000The metal-free regioselective green deuteration of hydroxyquinoline-type compounds with ambient reaction conditions and low-cost reagents provided valuable tools for isotopic labeling. The modified Skraup-Doebner-Von Miller synthesis of deuterated hydroxyquinolines has the potential to allow higher deuteration capacity. The presented isotopic exchange reactions also possess synthetic values as the source of deuterated compounds for the studies of NMR spectroscopy, medicinal research, and drug discovery processes.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45607152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"\"Assessment of Xylem Discs from Fruiting and Shading Plants in Tap-water Desalination\"","authors":"S. Lubbad, Atta Elfarram","doi":"10.2174/2213346110666221019142003","DOIUrl":"https://doi.org/10.2174/2213346110666221019142003","url":null,"abstract":"\u0000\u0000The low rainwater recharge rate and high seawater intrusion into water aquifer present a dilemma of high ground-water salinity for the narrow coastal Gaza Strip. Thus, extremely saline water causes impairment to household appliances and deteriorates the performance of the reverse-osmosis desalination units.\u0000\u0000\u0000\u0000Accordingly, xylem discs of different plants, such as Mulberry, Pomegranate, Olives, Centroza, and Ficus, were investigated for desalination of tap-water by flow-through experimentation. Various parameters such as the total dissolved salt of the inflow water, disc thickness, flow-rate and the type of plant were investigated. Finally, the morphology of the xylem discs of the five plants were screened using optical microscope.\u0000\u0000\u0000\u0000It was found that xylem of different plants showed dissimilar efficiencies in water desalination. Thus, Centroza established the highest desalination efficiency of 31%, followed by Olive and Ficus as 26 and 25%, respectively, while Pomegranate and Mulberry established the poorest salt removal of 17 and 14%, respectively. Successive three-disc set up established ~ 50% desalination of inflow-water of ~5000 ppm.\u0000\u0000\u0000\u0000Hence, disposable cost-effective xylem desalination unit is proposed as guard filter to be installed between the faucet and household desalination units and washing machines or dishwashers, in order to improve the performance and extend the life-time of these appliances.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46820129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fungal-Assisted Bioremediation of Agricultural Organic Pollutants (Pesticides and Herbicides)","authors":"P. Chaurasia, S. L. Bharati, Sunita Singh, Nagendra Sharma, Nagraj, Darshan M. Rudakiya","doi":"10.2174/2213346109666220927121948","DOIUrl":"https://doi.org/10.2174/2213346109666220927121948","url":null,"abstract":"\u0000\u0000Extensive use of pesticides and herbicides in the agricultural fields for the safeguard of crops engenders the huge concern regarding pollution of these agricultural fields as well as directly or indirectly linked to aquatic environment. In order to find out the apt bioremediation techniques that could be potentially used against these highly noxious agricultural pollutants, utilization of fungi and their associated enzymes like laccases and others may be an imperative tool against these pesticides, insecticides, and herbicides. Fungal system including fungal enzymes have proved their efficacy in the degradation studies of malathion (1), acetamiprid (2), 2, 4-D (3), chlorimuron-ethyl, imidacloprid (4), flubendiamide (5), thiamethoxam (6), pyrimethanil (7), cypermethrin (8), nicosulfuron (9), chlorpyrifos (10), isoproturon (11), chlorothalonil (12), DDT (13), atrazine (14), and alachlor (15) like agricultural organic pollutants which have been meritoriously and succinctly conferred here. \u0000There are limited recent works on fungal system-mediated bioremediation of pesticides and herbicides in compare to bacterial system that is why; authors have objectively decided to compile the recent promising researches on the topic to provide an effective and informative update on the significant applicability of fungal system in the removal of such organic pollutants. Herein, authors have best tried to present a clear, subject-centric and compact picture on the operative contribution of fungal systems (fungi and associated enzymes) in the biodegradation of different pesticides/insecticides or herbicides.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49567194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Meet the Associate Editor","authors":"J. Nycz","doi":"10.2174/221334610902221222161020","DOIUrl":"https://doi.org/10.2174/221334610902221222161020","url":null,"abstract":"","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46030918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biodegradation of polymers with microbial agents","authors":"Avinash Sharma, V. Devadas, Praseetha P. Nair, Chowlani Manpoong, Bhagya, D. Kartha","doi":"10.2174/2213346109666220620155653","DOIUrl":"https://doi.org/10.2174/2213346109666220620155653","url":null,"abstract":"\u0000\u0000Pollution by plastics is a major concern in this era. This paper discusses the research achievements concerning the degradation of polymers using different microbes. The Bacterial and fungal populations that reside in waste or dumped plastics decompose plastics naturally by enzymatic aerobic or anaerobic biodegradation. Bacteria and fungi with polymer-degrading ability are isolated through various technologies. The specific bacterial species like Bacillus sp., Rhodococcus sp., Pseudomonas sp., Staphylococcus sp., Arthrobacter sp., Microbacterium sp. and Phanerochaete sp. etc.. & specific fungal species like Aspergillus sp. or Penicillium sp. etc.. degrade polymers in the relevant rate of duration. The microbial polymer degradation will reform soil properties, soil ecology, soil ecosystem, agricultural crop production and improve the quality of surface and subsurface water. It restricts the pollution in the soil layer and mitigates the release of waste polymer from the polymer industry. Eventually, it will help to sustain the ecology and natural ecosystem. Furthermore, the scientific investigation may build standard materials and methods for producing biodegradable fertilizers for polymer degradation. Overall assessment of the study indicates that there is a possibility of developing effective bacterial or fungal consortia suited for external application on plastic debris for faster degradation; as well as to tackle waste management in polymer industries.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68187113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}