Pub Date : 2019-12-31DOI: 10.3126/jncs.v40i0.27281
R. Aryal, B. R. Poudel, S. K. Gautam, H. Paudyal, K. N. Ghimire
Various separation techniques have been successful for the removal of fluoride from aqueous solution. In this review, an extensive list of various biomass-based adsorbents from literature has been explored and their adsorption capacities under different conditions for the removal of fluoride available in the literature to date are presented. Several adsorbents have shown good adsorption capacities; however, modified biomass had shown excellent adsorption capacities compared to commercial materials. This paper reviews the fluoride uptake capacities of biomass materials and their modified forms as adsorbents against different experimental limits.
{"title":"Removal of Fluoride from Aqueous Solution Using Biomass-Based Adsorbents: A Review","authors":"R. Aryal, B. R. Poudel, S. K. Gautam, H. Paudyal, K. N. Ghimire","doi":"10.3126/jncs.v40i0.27281","DOIUrl":"https://doi.org/10.3126/jncs.v40i0.27281","url":null,"abstract":"Various separation techniques have been successful for the removal of fluoride from aqueous solution. In this review, an extensive list of various biomass-based adsorbents from literature has been explored and their adsorption capacities under different conditions for the removal of fluoride available in the literature to date are presented. Several adsorbents have shown good adsorption capacities; however, modified biomass had shown excellent adsorption capacities compared to commercial materials. This paper reviews the fluoride uptake capacities of biomass materials and their modified forms as adsorbents against different experimental limits.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"30 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82743184","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}
Pub Date : 2019-12-31DOI: 10.3126/jncs.v40i0.27287
R. Shrestha, S. Joshi
Activated carbon prepared coconut shell using Phosphoric acid as an activating agent was investigated to find the feasibility ofits application for removal of Cd(II) from aqueous solution through the adsorption process. The activated carbon thus prepared has been characterized by SEM, XRD, FTIR. SEM morphology has revealed the pores of different diameters while FTIR showed the presence of surface functional groups such as carboxyl, phenolic and lactones. Batch mode kinetics and isotherm studies were carried out to evaluate the effects of contact time, adsorbent dose and pH. The optimum pH, contact time and adsorbent dose needed for the adsorption of the heavy metal have been found to be 6, 180 minutes and 2 g/L respectively. Langmuir and Freundlich isotherm models have been employed to analyze the adsorption equilibrium data. It was found that the adsorption isotherm of Cd(II) onto the activated carbon was the best described by Langmuir with an adsorption capacity of 33.71 mg/g. Kinetic studies showed that a pseudo second-order model was more suitable than the pseudo first-order model. It has been concluded that the activated carbon prepared from coconut shell can be used as an effective adsorbent for the removal of Cd(II) from aqueous solution.
{"title":"Isotherms and Kinetic Studies on the Adsorption of Cd(II) onto Activated Carbon Prepared from Coconut (Cocos nucifera) Shell","authors":"R. Shrestha, S. Joshi","doi":"10.3126/jncs.v40i0.27287","DOIUrl":"https://doi.org/10.3126/jncs.v40i0.27287","url":null,"abstract":"Activated carbon prepared coconut shell using Phosphoric acid as an activating agent was investigated to find the feasibility ofits application for removal of Cd(II) from aqueous solution through the adsorption process. The activated carbon thus prepared has been characterized by SEM, XRD, FTIR. SEM morphology has revealed the pores of different diameters while FTIR showed the presence of surface functional groups such as carboxyl, phenolic and lactones. Batch mode kinetics and isotherm studies were carried out to evaluate the effects of contact time, adsorbent dose and pH. The optimum pH, contact time and adsorbent dose needed for the adsorption of the heavy metal have been found to be 6, 180 minutes and 2 g/L respectively. Langmuir and Freundlich isotherm models have been employed to analyze the adsorption equilibrium data. It was found that the adsorption isotherm of Cd(II) onto the activated carbon was the best described by Langmuir with an adsorption capacity of 33.71 mg/g. Kinetic studies showed that a pseudo second-order model was more suitable than the pseudo first-order model. It has been concluded that the activated carbon prepared from coconut shell can be used as an effective adsorbent for the removal of Cd(II) from aqueous solution.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"61 1","pages":"78-83"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91283259","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}
Pub Date : 2019-12-31DOI: 10.3126/jncs.v40i0.27271
Amrit Regmi, J. Bhandari, Sitaram Bhattarai, S. K. Gautam
Cuprous oxide nanoparticles were synthesized by the reduction of copper sulphate pentahydrate salt at different concentration using sodium borohydride as a reducing agent, polyethylene glycol-6000 as a stabilizer by simple, chemical co-precipitation methods and the effect of concentration on particle size were also studied. The crystalline size and phase of Cu2O nanoparticles (NPs) were authenticated by X-ray diffraction (XRD), morphology and structure by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental analysis was carried out by energy-dispersive X-ray spectroscopy (EDX). The concentration-dependent antimicrobial properties of Cu2O NPs were studied for a different strain of bacteria. XRD and selected area electron diffraction studies (SAED) patterns confirmed the formation of face-centered-cubic Cu2O nanoparticles with size 4.77 nm and 8.02 nm at two different concentrations of 0.01 M and 0.1 M CuSO4, respectively. SEM and TEM images showed that the nanoparticles were uniform, in the form of clusters, and homogeneously distributed. EDX confirmed that synthesized nanoparticles were in pure form having copper and oxygen ratio 3:1 based on the atomic percentage of the chemical species. Cu2O nanoparticles showed excellent antibacterial activity against both bacterial strains Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli). The antibacterial activities of Cu2O NPs were found to be concentration-dependents and large bactericidal effect were seen for Gram-positive (Staphylococcus aureus) bacteria at higher concentrations of Cu2O NPs.
以硼氢化钠为还原剂，聚乙二醇-6000为稳定剂，采用简单化学共沉淀法，以不同浓度的五水硫酸铜盐为原料，还原合成氧化亚铜纳米颗粒，并研究了浓度对颗粒大小的影响。采用x射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和能量色散x射线能谱(EDX)对Cu2O纳米颗粒(NPs)的晶粒尺寸和物相进行了表征，并对纳米颗粒的形貌和结构进行了表征。对不同菌株的Cu2O NPs进行了浓度依赖性抗菌性能的研究。XRD和选择区域电子衍射(SAED)图证实，在0.01 M和0.1 M CuSO4浓度下，分别形成了尺寸为4.77 nm和8.02 nm的面心立方Cu2O纳米颗粒。扫描电镜(SEM)和透射电镜(TEM)图像显示，纳米颗粒均匀，呈簇状，分布均匀。EDX证实，合成的纳米颗粒是纯形式的，铜和氧的比例为3:1(基于化学物质的原子百分比)。Cu2O纳米颗粒对革兰氏阳性菌(金黄色葡萄球菌)和革兰氏阴性菌(大肠杆菌)均表现出良好的抗菌活性。Cu2O NPs的抑菌活性呈浓度依赖性，高浓度Cu2O NPs对革兰氏阳性(金黄色葡萄球菌)细菌有较强的杀菌作用。
{"title":"Synthesis, Characterizations and Antimicrobial Activity of Cuprous Oxide (Cu2O) Nanoparticles","authors":"Amrit Regmi, J. Bhandari, Sitaram Bhattarai, S. K. Gautam","doi":"10.3126/jncs.v40i0.27271","DOIUrl":"https://doi.org/10.3126/jncs.v40i0.27271","url":null,"abstract":"Cuprous oxide nanoparticles were synthesized by the reduction of copper sulphate pentahydrate salt at different concentration using sodium borohydride as a reducing agent, polyethylene glycol-6000 as a stabilizer by simple, chemical co-precipitation methods and the effect of concentration on particle size were also studied. The crystalline size and phase of Cu2O nanoparticles (NPs) were authenticated by X-ray diffraction (XRD), morphology and structure by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental analysis was carried out by energy-dispersive X-ray spectroscopy (EDX). The concentration-dependent antimicrobial properties of Cu2O NPs were studied for a different strain of bacteria. XRD and selected area electron diffraction studies (SAED) patterns confirmed the formation of face-centered-cubic Cu2O nanoparticles with size 4.77 nm and 8.02 nm at two different concentrations of 0.01 M and 0.1 M CuSO4, respectively. SEM and TEM images showed that the nanoparticles were uniform, in the form of clusters, and homogeneously distributed. EDX confirmed that synthesized nanoparticles were in pure form having copper and oxygen ratio 3:1 based on the atomic percentage of the chemical species. Cu2O nanoparticles showed excellent antibacterial activity against both bacterial strains Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli). The antibacterial activities of Cu2O NPs were found to be concentration-dependents and large bactericidal effect were seen for Gram-positive (Staphylococcus aureus) bacteria at higher concentrations of Cu2O NPs.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"171 1","pages":"5-10"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76647563","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v38i0.27779
R. Panta, Sabita Shrestha
Available with full text.
提供全文。
{"title":"Chemical Synthesis of Silver Nanostructure: Size Dependent Electronic Properties","authors":"R. Panta, Sabita Shrestha","doi":"10.3126/jncs.v38i0.27779","DOIUrl":"https://doi.org/10.3126/jncs.v38i0.27779","url":null,"abstract":"Available with full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"185 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74945717","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v39i0.27028
G. Bhandari, Rajesh Pandit, N. L. Bhandari
Available with full text.
提供全文。
{"title":"Extraction and Characterization of Chitosan and Preparation of Nanocomposites with Resorcinol Formaldehyde Resin","authors":"G. Bhandari, Rajesh Pandit, N. L. Bhandari","doi":"10.3126/jncs.v39i0.27028","DOIUrl":"https://doi.org/10.3126/jncs.v39i0.27028","url":null,"abstract":"Available with full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77402318","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v39i0.27008
H. Oli, Nabin Sharma, Ekaraj Kc, A. Subedee, R. Timilsina
Available with full text.
提供全文。
{"title":"Green Synthesis of Copper Nanoparticles using Zingiber officinale Extract and Characterization","authors":"H. Oli, Nabin Sharma, Ekaraj Kc, A. Subedee, R. Timilsina","doi":"10.3126/jncs.v39i0.27008","DOIUrl":"https://doi.org/10.3126/jncs.v39i0.27008","url":null,"abstract":"Available with full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"580 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76413858","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v38i0.27783
L. Mandal, S. Pandey, M. Sharma
Available with full text.
提供全文。
{"title":"Antimicrobial Studies of Schiff's Base Ligands and Their Oxovanadium (IV) Complexes","authors":"L. Mandal, S. Pandey, M. Sharma","doi":"10.3126/jncs.v38i0.27783","DOIUrl":"https://doi.org/10.3126/jncs.v38i0.27783","url":null,"abstract":"Available with full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90860342","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v38i0.27796
S. P. Singh
Available with full text.
提供全文。
{"title":"Study of Some Transition Metal Complexes of Schiff Base: Thermodynamic and Kinetic Aspects","authors":"S. P. Singh","doi":"10.3126/jncs.v38i0.27796","DOIUrl":"https://doi.org/10.3126/jncs.v38i0.27796","url":null,"abstract":"Available with full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91244427","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v38i0.27798
Umesh Prasad Chaurasia
Available with Full text.
提供全文。
{"title":"Effect of N-(7-dimethylamino-4-methyl-3-coumarinyl) Maleimide on Fermentation of Citric Acid by Aspergillus niger NCIM-2101","authors":"Umesh Prasad Chaurasia","doi":"10.3126/jncs.v38i0.27798","DOIUrl":"https://doi.org/10.3126/jncs.v38i0.27798","url":null,"abstract":"Available with Full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83926580","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}
Pub Date : 2018-12-31DOI: 10.3126/jncs.v39i0.27035
P. Bhatt, R. Aryal, B. R. Poudel, Sitaram Bhattarai, S. K. Gautam
Available with full text.
提供全文。
{"title":"Adsorptive Removal of Cr (VI) from Aqueous Solution onto Charred Sugar Cane Bagasse","authors":"P. Bhatt, R. Aryal, B. R. Poudel, Sitaram Bhattarai, S. K. Gautam","doi":"10.3126/jncs.v39i0.27035","DOIUrl":"https://doi.org/10.3126/jncs.v39i0.27035","url":null,"abstract":"Available with full text.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83043928","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：