نتایج جستجو برای: pb removal

تعداد نتایج: 176648  

2010
S. A. Shama

The adsorption capacity of hebba clay and activated carbon towards (Fe 3+ , Cu 2+ , Zn 2+ , Pb 2+ , Cr 3+ , Cd 2+ ) metal ions was studied. The adsorption capacity was investigated by batch experiment. The effect of weight of hebba was studied and the results showed that the removal percentages increased as the weight of sorbent increased. The effect of contact time was also studied and the res...

2014
Nejat Sadati Behbahani Kobra Rostamizadeh Mohammad Reza Yaftian Abbasali Zamani Hamideh Ahmadi

BACKGROUND Lead is one of the hazardous materials which is associated with pollution and toxicity problems. This paper describes a novel approach for removal of lead from wastewater. Although naked magnetic nanoparticles have been applied for removal of different pollutants from wastewater, there was no research on employment of covalently PEG modified magnetic nanoparticles for such purpose. ...

2015
Mohammad Reza Fadaei Tehrani Abolfazl Shamsai Manoochehr Vossughi

Originally, application of nano zero valent iron (nZVI) particles for the removal of lead (Pb(2+)) in porous media was studied. At first, stabilized nZVI (S-nZVI) was prepared and characterized, then used in batch and continuous systems. Based on the batch experiments, corresponding reaction kinetics well fitted with the pseudo-first-order adsorption model, and reaction rate ranged from 0.01 to...

Journal: :progress in biological sciences 2012
mohammad ali amoozegar nooshinsadat ghazanfari maryam didari

toxic heavy metals, such as lead (pb) and cadmium (cd) are widely used in industry and their accumulation in the living tissues may cause serious health problems and ecological hazards. twenty four moderately halophilic bacteria isolated from saline environments of iran were used to study their ability to bioremediation of lead and cadmium. amongst them, a gram-negative rod shaped bacterium, de...

Journal: :journal of safety, environment, and health research 0
hamid reza tashauoei department of environmental health engineering, school of public health, islamic azad university tehran medical branch, tehran, iran. sara hashemi research center for environmental pollutants and department of environmental health engineering, qom university of medical sciences roya ardani research center for environmental pollutants and department of environmental health engineering, qom university of medical sciences zeynab yavari environment research center, isfahan university of medical sciences, isfahan, iran mahdi asadi-ghalhari research center for environmental pollutants and department of environmental health engineering, qom university of medical sciences

sawdust is now being investigated as an adsorbent to remove contaminants from aqueous solution. heavy metals can be decreased very effectively with the organic material. in this research, adsorption of pb (ii) onto modified beech sawdust in a batch system was investigated. sawdust was collected from timber mill of qom, iran, and modified with h2so4 and naoh. then, the effects of various paramet...

Journal: :iranian journal of toxicology 0
سهیل سبحان اردکانی soheil sobhanardakani . department of the environment, college of basic sciences, hamedan branch, islamic azad university, hamedan, iran. رضیه زندی پاک raziyeh zandipak msc environment, young researchers & elite club, hamedan branch, islamic azad university, hamedan, iran. حسن پرویزی مساعد hassan parvizimosaed young researchers & elite club, hamedan branch, islamic azad university, hamedan, iran. آرش جوانشیرخویی arash javanshir khoei department of fisheries, college of agriculture & natural resources, university of tehran, karaj, iran. مهران مسلمی mehran moslemi department of fisheries, jouybar branch, islamic azad university, jouybar, iran. مهسا طاهرگورابی mahsa tahergorabi department of public health, kerman university of medical sciences, kerman, iran. سیدمهدی حسینی

background: heavy metals have been recognized as harmful environmental pollutant known to produce highly toxic effects on different organs and systems of both humans and animals. the aim of this paper is to evaluate the adsorption potential of chitosan for the removal of pb(ii), fe(ii) and cu(ii) ions from aqueous solutions. methods: this study was conducted in laboratory scale. in this paper c...

Masoomeh Emadi, Masoud Edalati Mohammad Ali Zare, Mohammad Sadegh Moaddeli Razieh Karimi haghighi

An agricultural waste i.e. rice husk has been used as a cheap adsorbent for the removal ofleadas a harmful heavy metal from contaminated water via adsorption. The adsorption capacity of rice husk was calculated by equilibrium models. The results showed that the adsorption process has the best accordance with Langmuir model. The kinetics of the adsorption was also investigated and obtained that ...

2003
Frank Goodridge

The removal of Pb(I1) ions from aqueous solutions of perchlorate, nitrate, tetrafluoroborate, chloride and sulfate, pH 2, has been investigated in a cell with a reticulated vitreous carbon cathode. It is confirmed that the Pb(II) may always be removed. There are, however, marked differences in the conditions necessary and the performance attained by the system (eg, rate of removal, current effi...

2017
Anna V Kirillova Anna A Danilushkina Denis S Irisov Nataliya L Bruslik Rawil F Fakhrullin Yuri A Zakharov Vladimir S Bukhmin Dina R Yarullina

Cadmium (Cd) and lead (Pb) are heavy metals, important environmental pollutants, and potent toxicants to organism. Lactic acid bacteria (LAB) have been reported to remove Cd and Pb from solutions and therefore represent a useful tool for decontamination of food and beverages from heavy metals. Heavy metal ion binding by LAB was reported as metabolism-independent surface process. In this work te...

Journal: :international journal of environmental research 2014
m. abd el fatah m.e. ossman

in this study metal oxide nano powder namely nio nanopowder was prepared .the producedmetal oxide was characterized and used as potential adsorbent for the removal of pb and zn from aqueoussolution. the rate of uptake of the pb and zn are rapid in the beginning and the time required for equilibrium adsorption is 120 min .the time of equilibrium as well as time required to achieve a definite fra...

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