نتایج جستجو برای: removal methods
تعداد نتایج: 1991906 فیلتر نتایج به سال:
background and aims: the removing of (potential) toxic heavy metal ions from sewage, especially in industrial and mining waste effluents, has been widely studied in recent years. the aim of present study was to investigate the various methods for lead removal of lead ions from industrial wastewater. methods: this study was a review research. data were collected through different databases in va...
the aim of this paper is eliminating cr(vi) by natural hap. hap is a inexpensive material which is used from bovine critical bone ash in order to remove heavy metal ions like cr(vi). some experiments in different ph are performed (ph=2,3,7). maximum adsorption was appeared at ph=2, dosage=0.3 gr, c0=10 mg/l. cr(vi) removal depends on ph value and initial amount of cr(vi) result of experiments w...
Industrial development and extensive use of heavy metals have led to the problem of environmental pollution. Nickel compounds are toxic to plants and have detrimental effects on their growth. Valerian is a plant used in herbal medicine. Considering the hazards of nickel, various methods have been developed to remove this contaminant from herbs irrigation wastewater, including the common chemica...
Introduction: Antibiotics as a type of pharmaceutical compounds are widely used in modern medicine and veterinary industries. They enter the environment in different ways, including agricultural runoff, direct discharge of urban wastewater treatment or human waste, direct disposal of medical, veterinary industrial waste and to name but a few. Antibiotics have been able to influence the microbia...
I read the letter on ‘Early implant removal: an ethical dilemma’ by Bari et al. in the January 2013 issue of the Journal with interest, a great feeling of disappointment and I shared the feelings of alarm with the authors. The piece reported a 29-year-old woman who was so dissatisfied with her subdermal implant that she attempted removal herself without anaesthetic and she broke the device. She...
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
CONTEXT Contraception for women on enzyme-inducing drugs. OBJECTIVE To gather preliminary information on the contraceptive efficacy of the hormone-releasing intrauterine system (IUS) Mirena, when used concurrently with enzyme-inducers. DESIGN Observational series. SETTING/PARTICIPANTS Mirena users on enzyme-inducers were recruited from within the Margaret Pyke Centre and via doctors from ...
introduction: antibiotics as a type of pharmaceutical compounds are widely used in modern medicine and veterinary industries. they enter the environment in different ways, including agricultural runoff, direct discharge of urban wastewater treatment or human waste, direct disposal of medical, veterinary industrial waste and etc. antibiotics have been able to influence the microbial population....
industrial development and extensive use of heavy metals have led to the problem of environmental pollution. nickel compounds are toxic to plants and have detrimental effects on their growth. valerian is a plant used in herbal medicine. considering the hazards of nickel, various methods have been developed to remove this contaminant from herbs irrigation wastewater, including the common chemica...
Although pharmaceutical compounds such as antibiotics have been of great help to animals and humans, the excessive use them become a global problem due resistance pathogens these drugs, for this reason series methods reported that we will see below allow remove efficiently, economically, environmentally friendly antibiotics.
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