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In situ formation of bimetallic FeNi nanoparticles on sand through green technology:Application for tetracycline removal

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Frontiers of Environmental Science & Engineering 2020年第1期14卷 185-197页

作者： Ravikumar KVG Debayan Ghosh M rudula Pulimi chandrasekaran natarajan Amitava Mukherjee Centre for Nanobiotechnology VITVelloreTamil NaduIndia

In this study,FeNi nanoparticles were green synthesized using Punica granatum(pomegranate)peel extract,and these nanoparticles were also formed in situ over quartz sand(GS-FeNi)for removal of tetracycline(TC).Under the optimized operating conditions,(GS-FeNi concentration:1.5%w/v;concentration of TC:20 mg/L;interaction period:180 min),99±0.2%TC removal was achieved in the batch reactor The removaT capacity was 181±1 mg/g.A detailed characterization of the sorbent and the solution before and after the interaction revealed that the removal mechanism(s)involved both the sorption and degradation of *** reusability of reactant was assessed for four cycles of operation,and 77±4%of TC removal was obtained in the *** judge the environmental sustainability of the process,residual toxicity assay of the interacted TC solution was performed with indicator bacteria(Bacillus and Pseudomonas)and algae(Chlorella sp.),which confirmed a substantial decrease in the *** continuous column studies were undertaken in the packed bed reactors using *** the optimized conditions,quite high removal efficiency(978±5 mg/g)was obtained in the *** application of GS-FeNi for antibiotic removal was further evaluated in lake water,tap water,and ground water spiked with TC,and the removal capacity achieved was found to be 781±5,712±5,and 687±3 mg/g,*** work can pave the way for treatment of antibiotics and other pollutants in the reactors using novel green composites prepared from fruit wastes.

关键词： GS-FeNi nanoparticles Tetracycline removal Re-usability Residual toxicity Column studies

Assessing combined toxic effects of tetracycline and P25 titanium dioxide nanoparticles using Allium cepa bioassay

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Frontiers of Environmental Science & Engineering 2021年第1期15卷 101-112页

作者： Barsha Roy Khushboo Kadam Suresh Palamadai Krishnan chandrasekaran natarajan Amitava Mukherjee School of Biosciences and Technology VITVellore 632014India Centre for Nanobiotechnology VITVellore 632014India

Usage of titanium dioxide nanoparticles(TiO_(2) NPs)and tetracycline(TC)has increased significantly in the present *** leads to their release and accumulation in the *** the compounds,individually,can have adverse toxic effects on the *** binary mixtures can increase this degree of *** present study aimed to evaluate the toxicity of both the contaminants in individual and binary mixtures in Allium ***,the toxicity of TiO_(2) NPs upon UVA pre-irradiation was also *** showed that UVA pre-irradiated NPs(UVA-TiO_(2) NPs)had a significant decrease in cell viability than their non-irradiated counterparts(NI-TiO_(2)),denoting an increase in photocatalytic activity upon UVA *** low concentrations of TC(EC10=0.016µmol/L)mixed with TiO2 NPs significantly increased the toxicity for both UVA-TiO_(2) and NI-TiO_(2) *** ROS generation was significantly high for UVA-TiO_(2) ***,TC did not have any effects on ROS *** the compounds exhibited genotoxic potential in *** chromosomal abnormalities like anaphase bridges,telophase bridges,laggard chromosomes,binucleate cells,*** *** binary mixture of UVA-TiO_(2) NPs and TC showed the highest chromosomal aberrations(64.0%±1.26%)than the mixture with NI-TiO_(2) or the individual *** decreased significantly after recovery(46.8%±1.92%),denoting the self-repair *** study proved that UVA-TiO2 NPs were more toxic and could be enhanced further when mixed with a sub-lethal concentration of *** work will help to assess the risk of both compounds in the environment.

关键词： Binary toxicity Cell viability Mitotic index Chromosomal aberration Reactive oxygen species Nanoparticles internalization

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Cytogenetic studies of chromium(Ⅲ) oxide nanoparticles on Allium cepa root tip cells

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Journal of Environmental Sciences 2015年第12期27卷 150-157页

作者： Deepak Kumar A.Rajeshwari Pradeep Singh Jadon Gouri Chaudhuri Anita Mukherjee natarajan chandrasekaran Amitava Mukherjee Centre for Nanobiotechnology VIT University Centre of Advanced Study Department of BotanyUniversity of Calcutta

The current study evaluates the cytogenetic effects of chromium（Ⅲ） oxide nanoparticles on the root cells of Allium *** root tip cells of *** were treated with the aqueous dispersions of Cr2O3 nanoparticles（NPs） at five different concentrations（0.01,0.1,1,10,and 100 μg/m L） for 4 *** colloidal stability of the nanoparticle suspensions during the exposure period were ascertained by particle size *** 4 hr exposure to Cr2O3 NPs,a significant decrease in mitotic index（MI） from 35.56%（Control） to 35.26%（0.01 μg/m L）,34.64%（0.1 μg/m L）,32.73%（1 μg/m L）,29.6%（10 μg/m L） and 20.92%（100 μg/m L） was *** optical,fluorescence and confocal laser scanning microscopic analyses demonstrated specific chromosomal aberrations such as-chromosome stickiness,chromosome breaks,laggard chromosome,clumped chromosome,multipolar phases,nuclear notch,and nuclear bud at different exposure *** concentration-dependent internalization/bio-uptake of Cr2O3 NPs may have contributed to the enhanced production of anti oxidant enzyme,superoxide dismutase to counteract the oxidative stress,which in turn resulted in observed chromosomal aberrations and cytogenetic *** results suggest that *** root tip assay can be successfully applied for evaluating environmental risk of Cr2O3 NPs over a wide range of concentrations.

关键词： A.cepa Bio-uptake Chromosomal aberration C2O3 nanoparticles Mitotic index SOD

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Corrigendum to ＂Silver nanoparticles tolerant bacteria from sewage environment＂

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Journal of Environmental Sciences 2016年第6期28卷 280-280页

作者： Sudheer Khan Amitava Mukherjee natarajan chandrasekaran Nanobio-medicine Laboratory School of Bio-Sciences and Technology VIT University Vellore 632014 India

Figure 3 and the section 1.2 in the above-referenced article was published without a citation in error. The figure should have been credited as follows： Copyright 2016 Elsevier Inc. Reprinted with permission from Ra...

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跨国CEO眼中的2012年投资环境

博鳌观察 2012年第1期 128-132页

作者：项兵 Motek Singh Ahluwalia Michael Andrew Stewart A.Baker 谢国民傅成玉 natarajan chandrasekaran 平手晴彦艾尔克·霍克斯特洪起俊雷夫·约翰森罗伯特·金米特 K.K.Modi 蒋亚飞梁稳根西室泰三卢英德鲍尔森李润雨三村明夫马蔚华宫内义彦武藤敏郎庄睿思 Malvinder Singh Ramadorai Subramanian 赵国华 Artem Volynets 长江商学院印度计划委员会毕马威美国世强律师事务所泰国正大集团中国石油化工集团公司印度塔塔信息技术有限公司日本武田药品荷兰皇家孚宝董事会韩国韩华集团瑞典爱立信德勤跨境投资中心印度Modi公司华为技术有限公司中国三一集团东京证券交易所百事可乐日本新日铁中国招商银行日本欧力士集团日本大和总研 GE 印度南新制药法国施耐德电气集团俄罗斯En+

跨国公司是对外直接投资的主要表现形式,他们亦是当今经济全球化发展中最重要的商业单元。跨国公司CEO们对2012年全球投资环境的研判,很具参考价值。同时,对于全球化未来的战略性发展,来自第一线的各国CEO们,也有自己独特的看法。4月2...

跨国公司是对外直接投资的主要表现形式,他们亦是当今经济全球化发展中最重要的商业单元。跨国公司CEO们对2012年全球投资环境的研判,很具参考价值。同时,对于全球化未来的战略性发展,来自第一线的各国CEO们,也有自己独特的看法。4月2日上午,博鳌亚洲论坛年会上呈现了一场精彩的闭门会,美国前财政部长鲍尔森和长江商学院院长项兵,召集了全球20余家跨国公司的CEO们,一起分析研判了2012年全球对外直接投资(FDI)的投资环境和可能的投资机会。

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