Journal of Chemical Health Risks最新文献_第9页

Extraction and PerconcentrationLead (II) Using Octadecyl Bonded Silica Cartridge and Determination by FAAS 十八烷基键合硅胶筒萃取富集铅(II)及火焰原子吸收光谱法测定

Journal of Chemical Health Risks Pub Date : 2012-01-29 DOI: 10.22034/JCHR.2012.543978

A. Moghimi, M. Shaabanzadeh

引用次数: 0

Preconcentration of Zn(II) from Sample Water by Phenyl-iminodiacetic Acid Grafted Multiwalled Carbon Nanotubes 苯基亚氨基二乙酸接枝多壁碳纳米管对样品水中锌(II)的预富集

Journal of Chemical Health Risks Pub Date : 2012-01-01 DOI: 10.22034/JCHR.2018.544002

A. Moghimi

{"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}

引用次数: 0

The Effects of ZnOnanorodson the Characteristics of Sago Starch Biodegradable Films 氧化锌对西米淀粉生物降解膜特性的影响

Journal of Chemical Health Risks Pub Date : 2012-01-01 DOI: 10.22034/JCHR.2018.544007

R. Alebooyeh, A. MohammadiNafchi, M. Jokar

{"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}

引用次数: 41

Investigation of heavy metals (Cadmium, Lead) in Chironomidae and Gammarus pulex Namrood River – Tehran Province 德黑兰省纳姆鲁德河中螯虾科和野螯虾重金属(镉、铅)的调查

Journal of Chemical Health Risks Pub Date : 2011-01-01 DOI: 10.22034/JCHR.2012.543979

M. Rezaei, A. Kamali, M. Shapoori

{"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}

引用次数: 2