نتایج جستجو برای: hexavalent chromium lead

تعداد نتایج: 359911  

استادی, مرضیه, استادی, وجیهه, تیرگر, آرام, ریسمانچیان, مسعود, شاه طاهری, سید جمال الدین, محمد, کاظم, گلبابایی, فریده,

Background and Aim: Exposure to hexavalent chromium in plating operations is associated with skin ulceration, contact dermatitis, respiratory tract irritation, cancer, and kidney damage. We investigated the possibility of using biological monitoring to assess exposure to hexavalent chromium in chrome-plating workers. We compared mean Cr6 concentrations in the breathing zone plus urine chromium,...

2015
Prashant Kumar Shrivastava S. K. Gupta

Several low cost biomaterials such as rice husk, sugar cane bagasse, Tulsi Leaf &branches, coconut shell & coir and fly ash were tested for removal of chromium. All the experiments were carried out in batch process. The adsorbent, which had highest chromium (VI) removal, was coconut shell. An influence of chromium concentration, contact time on removal of chromium from effluent was investigated...

Journal: :Nihon eiseigaku zasshi. Japanese journal of hygiene 1990
M Okamoto H Nakayama T Nose

To reveal the effects of cultural conditions on the cytotoxicity of hexavalent chromium, the uptake of sodium chromate (Na2CrO4) by KB cells and the colony-forming efficiency of the cells were examined under various cultural conditions. The results were summarized as follows: 1) The chromium uptake by the cells after a certain period of incubation with hexavalent chromium was inhibited with the...

Journal: :iranian journal of public health 0
abolfazl barkhordari 1. dept. of occupational health, faculty of health, shahid sadoughi university of medical sciences , yazd, iran. mohammad javad zare sakhvidi 1. dept. of occupational health, faculty of health, shahid sadoughi university of medical sciences , yazd, iran. fariba zare sakhvidi 1. dept. of occupational health, faculty of health, shahid sadoughi university of medical sciences , yazd, iran. gholamhossein halvani 1. dept. of occupational health, faculty of health, shahid sadoughi university of medical sciences , yazd, iran. ali firoozichahak 1. dept. of occupational health, faculty of health, shahid sadoughi university of medical sciences , yazd, iran. gholamabbas shirali 2. dept. of occupational health engineering, school of public health, ahvaz jundishapur university of medical sciences , iran.

welders exposure to nickel and hexavalent chromium in welding fumes is associated with increase of cancer risk in welders. in this study we calculated cancer risk due to exposure to these compounds in welders.the role of exposure parameters in welders on derived incremental lifetime cancer risk were determined by stochastic modeling of cancer risk. input parameters were determined by field inve...

2006
Markku Nurminen

• Abstract This overview considers the occupational carcinogenicity of metallic chromium and trivalent chromium compounds in humans. The evaluations of the potential carcinogenicity of these chemicals by international and national organizations and by individual scientists are unanimous in that the evidence of carcinogenicity is inadequate in humans. For some sources of chromium exposure derive...

Journal: :British journal of industrial medicine 1989
T Nagaya N Ishikawa H Hata

To investigate the usefulness of sister chromatid exchange (SCE) analysis in lymphocytes as an indicator for mutagenic effects after in vivo exposure to hexavalent chromium (Cr), SCE frequency was analysed in lymphocytes of 44 Cr platers occupationally exposed to hexavalent Cr and 47 controls. Although urinary Cr analysis confirmed that the Cr platers were exposed to Cr, no effects of the expos...

Journal: :Reproductive biology 2012
Neila Marouani Olfa Tebourbi Sami Mahjoub Mohamed Tahar Yacoubi Mohsen Sakly Moncef Benkhalifa Khémais B Rhouma

Hexavalent chromium is an environmental contaminant which may be associated with reproductive abnormalities in male rats. In the present study, we examined the effect of hexavalent chromium on male reproductive function of rats. Male Wistar rats received a daily intraperitoneal injection of potassium dichromate (1 or 2 mg/kg body weight) for fifteen consecutive days. A decrease in testis weight...

2014
Farai Mutongo Olga Kuipa Pardon K. Kuipa

Potato peels which are a low cost, renewable agroindustry by-product were used for the removal of hexavalent chromium from aqueous effluents. Batch experiments were carried out with an artificial effluent comprising of potassium dichromate in deionised water. The effects of the initial hexavalent chromium concentration, dose of biosorbent, and removal kinetics were explored. An adsorbent dosage...

In this study, the adsorption of hexavalent chromium and zinc ions from the solution is investigated by raw red mud and mechanical-chemical activated red mud along with the possibility of selective reclamation of these ions from the solution. The mechanical-chemical activation of red mud was done by employing high-energy milling and subsequent acid treatment with HNO3. Raw red mud (RRM) and mec...

Journal: :Ecotoxicology and environmental safety 2008
Jun Yao Lin Tian Yanxin Wang Atakora Djah Fei Wang Huilun Chen Chunli Su Rensheng Zhuang Yong Zhou Martin M F Choi Emilia Bramanti

A multi-channel thermal activity monitor was applied to study soil microbial activity in Wuhan brown sandy soil in the presence of different concentrations of hexavalent chromium (K(2)Cr(2)O(7)). In order to stimulate the soil microbial activity, 5.0mg of glucose and 5.0mg of ammonium sulfate were added to a 1.20-g soil sample under a controlled humidity of 35%. The results show that the poison...

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