Journal of Nepal Chemical Society最新文献_第10页

Removal of Fluoride from Aqueous Solution Using Biomass-Based Adsorbents: A Review 生物质基吸附剂去除水溶液中氟化物的研究进展

Journal of Nepal Chemical Society Pub Date : 2019-12-31 DOI: 10.3126/jncs.v40i0.27281

R. Aryal, B. R. Poudel, S. K. Gautam, H. Paudyal, K. N. Ghimire

引用次数: 8

Isotherms and Kinetic Studies on the Adsorption of Cd(II) onto Activated Carbon Prepared from Coconut (Cocos nucifera) Shell 椰壳活性炭吸附Cd(II)的等温线及动力学研究

Journal of Nepal Chemical Society Pub Date : 2019-12-31 DOI: 10.3126/jncs.v40i0.27287

R. Shrestha, S. Joshi

{"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}

引用次数: 1

Synthesis, Characterizations and Antimicrobial Activity of Cuprous Oxide (Cu2O) Nanoparticles 氧化亚铜纳米颗粒的合成、表征及抗菌活性研究

Journal of Nepal Chemical Society Pub Date : 2019-12-31 DOI: 10.3126/jncs.v40i0.27271

Amrit Regmi, J. Bhandari, Sitaram Bhattarai, S. K. Gautam

{"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}

引用次数: 13

Chemical Synthesis of Silver Nanostructure: Size Dependent Electronic Properties 银纳米结构的化学合成:尺寸依赖的电子性质

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v38i0.27779

R. Panta, Sabita Shrestha

引用次数: 0

Extraction and Characterization of Chitosan and Preparation of Nanocomposites with Resorcinol Formaldehyde Resin 壳聚糖的提取、表征及间苯二酚甲醛树脂纳米复合材料的制备

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v39i0.27028

G. Bhandari, Rajesh Pandit, N. L. Bhandari

引用次数: 1

Green Synthesis of Copper Nanoparticles using Zingiber officinale Extract and Characterization 利用生姜提取物绿色合成纳米铜及其表征

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v39i0.27008

H. Oli, Nabin Sharma, Ekaraj Kc, A. Subedee, R. Timilsina

引用次数: 5

Antimicrobial Studies of Schiff's Base Ligands and Their Oxovanadium (IV) Complexes 席夫碱配体及其氧钒配合物的抗菌研究

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v38i0.27783

L. Mandal, S. Pandey, M. Sharma

引用次数: 2

Study of Some Transition Metal Complexes of Schiff Base: Thermodynamic and Kinetic Aspects 席夫碱过渡金属配合物的热力学和动力学研究

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v38i0.27796

S. P. Singh

引用次数: 0

Effect of N-(7-dimethylamino-4-methyl-3-coumarinyl) Maleimide on Fermentation of Citric Acid by Aspergillus niger NCIM-2101 N-(7-二甲氨基-4-甲基-3-香豆素基)马来酰亚胺对黑曲霉nsim -2101发酵柠檬酸的影响

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v38i0.27798

Umesh Prasad Chaurasia

引用次数: 0

Adsorptive Removal of Cr (VI) from Aqueous Solution onto Charred Sugar Cane Bagasse 焦蔗渣吸附去除水溶液中铬(VI)的研究

Journal of Nepal Chemical Society Pub Date : 2018-12-31 DOI: 10.3126/jncs.v39i0.27035

P. Bhatt, R. Aryal, B. R. Poudel, Sitaram Bhattarai, S. K. Gautam

引用次数: 4