Pub Date : 2012-01-29DOI: 10.22034/JCHR.2012.543978
A. Moghimi, M. Shaabanzadeh
A simple method has been developed for the preconcentration of Lead (II) based on the adsorption of its 1-(2-Pyridyl Azo)2-Naphtol (PAN) complex on aOctadecyl bonded silica cartridges. The influence of acidity, eluting agents, stability of the column, sample volume and interfering ions has been investigated in detail. The adsorbed complex could be eluted using environmentally benign HNO34M and the concentration of Lead (II) was determined flame atomic absorption spectrometry. A detection limit of 50 µgL −1 could be achieved and the developed procedure was successfully applied for the determination of Lead (II) in tap water and waste water samples.
{"title":"Extraction and PerconcentrationLead (II) Using Octadecyl Bonded Silica Cartridge and Determination by FAAS","authors":"A. Moghimi, M. Shaabanzadeh","doi":"10.22034/JCHR.2012.543978","DOIUrl":"https://doi.org/10.22034/JCHR.2012.543978","url":null,"abstract":"A simple method has been developed for the preconcentration of Lead (II) based on the adsorption of its 1-(2-Pyridyl Azo)2-Naphtol (PAN) complex on aOctadecyl bonded silica cartridges. The influence of acidity, eluting agents, stability of the column, sample volume and interfering ions has been investigated in detail. The adsorbed complex could be eluted using environmentally benign HNO34M and the concentration of Lead (II) was determined flame atomic absorption spectrometry. A detection limit of 50 µgL −1 could be achieved and the developed procedure was successfully applied for the determination of Lead (II) in tap water and waste water samples.","PeriodicalId":15347,"journal":{"name":"Journal of Chemical Health Risks","volume":"40 1","pages":"33-38"},"PeriodicalIF":0.0,"publicationDate":"2012-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68029108","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 : 2012-01-01DOI: 10.22034/JCHR.2018.544002
A. Moghimi
: phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes were prepared by grafted phenyl-iminodiacetic acid groups onto multi-walled carbon nanotubes via a diazotation reaction. The stability of chemically phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes in concentrated hydrochloric acid which was then used as a recycling and pre-concentration reagent for further uses of phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes. The application of this phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes for sorption of a series of metal ions was performed by using different controlling factors such as the pH of metal ion solution and the equilibration shaking time by the static technique. Zn(II) was found to exhibit the highest affinity towards extraction by these phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes phases. The pronounced selectivity was also confirmed from the determined distribution coefficient ( K d ) of all the metal ions, showing the highest value reported for Zn(II) to occur by phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes. The potential applications of phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes for selective extraction of Zn(II) to occur from aqueous solution were successfully accomplished as well as pre- concentration of low concentration of Zn(II) (60 pg ml -1 ) from natural tap water with a pre-concentration factor of 100 for Zn(II) off-line analysis by flame atomic absorption analysis.
:通过重氮反应将苯基亚氨基二乙酸接枝到多壁碳纳米管上，制备了苯基亚氨基二乙酸接枝多壁碳纳米管。研究了化学上苯基亚氨基二乙酸接枝多壁碳纳米管在浓盐酸中的稳定性，并将浓盐酸作为进一步利用苯基亚氨基二乙酸接枝多壁碳纳米管的回收和预富集试剂。通过对金属离子溶液的pH值和平衡振荡时间的不同控制因素，采用静态技术研究了该多壁碳纳米管对一系列金属离子的吸附。结果表明，锌(II)在苯亚氨基二乙酸接枝的多壁碳纳米管相中具有最高的萃取亲和力。各金属离子的分布系数(K d)也证实了其显著的选择性，表明苯基亚氨基二乙酸接枝的多壁碳纳米管对Zn(II)的选择性最高。成功地实现了苯基亚氨基二乙酸接枝多壁碳纳米管在水溶液中选择性提取Zn(II)的潜在应用，以及从天然自来水中预浓缩低浓度Zn(II) (60 pg ml -1)，预浓缩系数为100，用于火焰原子吸收分析Zn(II)的离线分析。
{"title":"Preconcentration of Zn(II) from Sample Water by Phenyl-iminodiacetic Acid Grafted Multiwalled Carbon Nanotubes","authors":"A. Moghimi","doi":"10.22034/JCHR.2018.544002","DOIUrl":"https://doi.org/10.22034/JCHR.2018.544002","url":null,"abstract":": phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes were prepared by grafted phenyl-iminodiacetic acid groups onto multi-walled carbon nanotubes via a diazotation reaction. The stability of chemically phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes in concentrated hydrochloric acid which was then used as a recycling and pre-concentration reagent for further uses of phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes. The application of this phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes for sorption of a series of metal ions was performed by using different controlling factors such as the pH of metal ion solution and the equilibration shaking time by the static technique. Zn(II) was found to exhibit the highest affinity towards extraction by these phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes phases. The pronounced selectivity was also confirmed from the determined distribution coefficient ( K d ) of all the metal ions, showing the highest value reported for Zn(II) to occur by phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes. The potential applications of phenyl-iminodiacetic acid grafted multiwalled carbon nanotubes for selective extraction of Zn(II) to occur from aqueous solution were successfully accomplished as well as pre- concentration of low concentration of Zn(II) (60 pg ml -1 ) from natural tap water with a pre-concentration factor of 100 for Zn(II) off-line analysis by flame atomic absorption analysis.","PeriodicalId":15347,"journal":{"name":"Journal of Chemical Health Risks","volume":"19 1","pages":"21-27"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68029402","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 : 2012-01-01DOI: 10.22034/JCHR.2018.544007
R. Alebooyeh, A. MohammadiNafchi, M. Jokar
Nowadays tend to use biodegradable packaging; including edible coatings and films for free from synthetic chemicals and do not cause environmental pollution, the industry is growing day by day. The aim of this research was to preparation and characterization of biodegradable films supported with ZnOnanorods. In this study, sago starch based films were prepared and plasticized with sorbitol/ glycerol by casting method. ZnOnanorod with 0, 1, 3and 5%(w/w)was added to the films before casting the films. Films were dried at controlled conditions. Physicochemical properties such as water absorption capacity (WAC), permeability to water vapor (WVP) and water solubility of the films were measured. Also, the effects of addition of nano particles were measured on the antimicrobial properties of the films by agar diffusion method. Results showed that by increasing concentration of ZnOnanorod, solubility in water, WAC, and WVP of the films significantly (p <0.05) decreased. Furthermore, the addition of zinc oxide nanorods showed antimicrobial properties against E. Coli. In summary sago starch films supported with ZnOnanorodscan were used as active packaging for agricultural products as well as food industry.
{"title":"The Effects of ZnOnanorodson the Characteristics of Sago Starch Biodegradable Films","authors":"R. Alebooyeh, A. MohammadiNafchi, M. Jokar","doi":"10.22034/JCHR.2018.544007","DOIUrl":"https://doi.org/10.22034/JCHR.2018.544007","url":null,"abstract":"Nowadays tend to use biodegradable packaging; including edible coatings and films for free from synthetic chemicals and do not cause environmental pollution, the industry is growing day by day. The aim of this research was to preparation and characterization of biodegradable films supported with ZnOnanorods. In this study, sago starch based films were prepared and plasticized with sorbitol/ glycerol by casting method. ZnOnanorod with 0, 1, 3and 5%(w/w)was added to the films before casting the films. Films were dried at controlled conditions. Physicochemical properties such as water absorption capacity (WAC), permeability to water vapor (WVP) and water solubility of the films were measured. Also, the effects of addition of nano particles were measured on the antimicrobial properties of the films by agar diffusion method. Results showed that by increasing concentration of ZnOnanorod, solubility in water, WAC, and WVP of the films significantly (p <0.05) decreased. Furthermore, the addition of zinc oxide nanorods showed antimicrobial properties against E. Coli. In summary sago starch films supported with ZnOnanorodscan were used as active packaging for agricultural products as well as food industry.","PeriodicalId":15347,"journal":{"name":"Journal of Chemical Health Risks","volume":"2 1","pages":"13-16"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68029482","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 : 2011-01-01DOI: 10.22034/JCHR.2012.543979
M. Rezaei, A. Kamali, M. Shapoori
Marine ecosystem pollution is one of the important problems of today environment. In this study the existence of heavy metal in the Namrood River, situated in Firoozkooh in Tehran province, Iran has been investigated. The Namrood River is located near Firoozkooh route, and is affected by pollutant from tourist centers, entertainment, gas stations, nearby villages' sewage systems, farming effluent, and hatchery farms. In some areas, its water is heavily polluted possibly by heavy metals. After selecting two stations in upstream and downstream of the river, they were sampled three times in both cold and hot seasons of year (mid-March, and June) for Chironomidae, and Gammarus plux sediments. The measured heavy metals were cadmium and lead. The results showed that the concentration of cadmium in measured samples varied from 0.010-0.2033 ppm. The concentration of lead in samples varied from 0.11-2.16 ppm. The results also indicated that sediments of samples taken from the upper station in the cold season had a higher proportion of cadmium and a higher concentration of lead than sediments in the lower station during the hot season.
{"title":"Investigation of heavy metals (Cadmium, Lead) in Chironomidae and Gammarus pulex Namrood River – Tehran Province","authors":"M. Rezaei, A. Kamali, M. Shapoori","doi":"10.22034/JCHR.2012.543979","DOIUrl":"https://doi.org/10.22034/JCHR.2012.543979","url":null,"abstract":"Marine ecosystem pollution is one of the important problems of today environment. In this study the existence of heavy metal in the Namrood River, situated in Firoozkooh in Tehran province, Iran has been investigated. The Namrood River is located near Firoozkooh route, and is affected by pollutant from tourist centers, entertainment, gas stations, nearby villages' sewage systems, farming effluent, and hatchery farms. In some areas, its water is heavily polluted possibly by heavy metals. After selecting two stations in upstream and downstream of the river, they were sampled three times in both cold and hot seasons of year (mid-March, and June) for Chironomidae, and Gammarus plux sediments. The measured heavy metals were cadmium and lead. The results showed that the concentration of cadmium in measured samples varied from 0.010-0.2033 ppm. The concentration of lead in samples varied from 0.11-2.16 ppm. The results also indicated that sediments of samples taken from the upper station in the cold season had a higher proportion of cadmium and a higher concentration of lead than sediments in the lower station during the hot season.","PeriodicalId":15347,"journal":{"name":"Journal of Chemical Health Risks","volume":"1 1","pages":"39-44"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68029113","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}
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