نتایج جستجو برای: removal of heavy metals from water

تعداد نتایج: 21695424  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده مهندسی موادو متالورژی 1393

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...

Journal: :advances in environmental technology 0
kourosh razmgar department of chemical engineering, ferdowsi university zahra beagom mokhtari hosseini department of chemical engineering, hakim sabzevari university

the pollution of water environments is a challenging issue especially in developing countries. contamination of drinking water with heavy metals has been reported in many parts of the world. arsenic, chromium and lead are dangerous heavy metals and also common contaminants of drinking water. in this study, the capacity and performance of the surfactant-modified sabzevar natural nanozeolite (sms...

The pollution of water environments is a challenging issue especially in developing countries. Contamination of drinking water with heavy metals has been reported in many parts of the world. Arsenic, chromium and lead are dangerous heavy metals and also common contaminants of drinking water. In this study, the capacity and performance of the surfactant-modified Sabzevar natural nanozeolite (SMS...

Journal: :environmental health engineering and management 0
shidvash dowlatshahi environmental health engineering research center and department of environmental health, school of public health, kerman university of medical sciences, kerman, iran ahmad reza haratinezhad torbati environmental health engineering, department of environmental health, school of public health, kerman university of medical sciences, kerman, iran mahshid loloei [email protected]

background: industrial development has caused the release of various pollutants including heavy metals into the environment. these toxic compounds are extremely dangerous to living beings and the environment due to their non-biodegradability, severe toxicity, carcinogenicity, the ability to be accumulated in nature and the ability to contaminate groundwater and surface water. the aim of the pre...

Journal: :international journal of marine science and engineering 2013
n. moayyeri k. saeb e. biazar

heavy metals are highly poisonous in the environment, even in small quantities, and endanger certain species and all live beings. current methods of removing heavy metals from aqueous media include chemical sequestration, ion exchange, surface absorption, membrane processes, oxidation and revival procedures which have high investment and exploitation costs. hence, it is significantly necessary ...

E. Biazar K. Saeb N. Moayyeri,

Heavy metals are highly poisonous in the environment, even in small quantities, and endanger certain species and all live beings. Current methods of removing heavy metals from aqueous media include chemical sequestration, ion exchange, surface absorption, membrane processes, oxidation and revival procedures which have high investment and exploitation costs. Hence, it is significantly necessary ...

Ahmad Reza Haratinezhad Torbati, Mahshid Loloei, Shidvash Dowlatshahi,

Background: Industrial development has caused the release of various pollutants including heavy metals into the environment. These toxic compounds are extremely dangerous to living beings and the environment due to their non-biodegradability, severe toxicity, carcinogenicity, the ability to be accumulated in nature and the ability to contaminate groundwater and surface water. The aim of the pre...

Surface water contains a large number of pollutants, particularly human pathogens, organic toxicants and heavy metals. Due to the toxic nature of heavy metals towards marine organisms, its removal from the environment has been a growing issue. The biosorption of heavy metal ions from surface water using fish scales has emerged as an environmentally friendly technique. This study assessed the de...

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...

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