نتایج جستجو برای: Removal Heavy Metals

تعداد نتایج: 303575  

Journal: :محیط شناسی 0
امیرحسام حسنی استادیار دانشکده محیط زیست و انرژی ، واحد علوم وتحقیقات دانشگاه آزاد اسلامی ایمان حسین زاده دانشجوی کارشناسی ارشد مهندسی محیط زیست، دانشکده محیط زیست و انرژی، واحد علوم وتحقیقات دانشگاه آزاد اسلامی بهزاد ترابی فر کارشناس ارشد مهندسی محیط زیست، دانشکده محیط زیست ، دانشگاه تهران

in this research the operation of fixed activated sludge system for treatment of wastewater containing heavy metal compounds, by use of fas pilot ,a plaxy glass tank with three section; these section are downward-flow aerated reactor, upward-flow aerated reactor and gravity sediment unit, length and width and height of each part was respectively 15.7cm, 31.5cm , 51.5 cm and feeding with the syn...

Journal: :iranian journal of science and technology (sciences) 2004
t. eslamzadeh

the removal of copper (ii), zinc (ii), and chromium (iii) from wastewater by carrot residues(cr) was investigated to evaluate cation exchange capacity. the effects of solution ph and co- ions werestudied in batch experiments. adsorption equilibria were initially rapidly established, and then decreasedmarkedly after 10 min. column experiments were carried out in a glass column filled with cr toe...

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...

Journal: :international journal of environmental research 2010
b. dhir r. kumar

batch adsorption experiments were performed to study adsorption potential of agricultural residues viz. rice straw, wheat straw and salvinia plant biomass for removal of heavy metals such as cr, ni, and cd. plant materials were used in different combinations. heavy metal removal efficiency was more at low metal concentration (35 mg/l). salvinia biomass possessed higher efficiency for removing h...

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: :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...

Journal: :مجله بهداشت محیط و توسعه پایدار 0
seyedvahid ghelmani m.sc. student pollutions, islamic azad university, yazd, iran. seyedabolghasem mirhossenidehabadi assistant professor, environmental pollutions department, islamic azad university, yazd, iran. mohammadtaghi ghaneian associate professor, environmental science and technology research center, department of environmental health engineering, school of public health, shahid sadoughi university of medical science, yazd, iran. hadi eslami phd candidate, environmental science and technology research center, department of environmental health engineering, school of public health, shahid sadoughi university of medical sciences, yazd, iran.

introduction: sequential batch reactor (sbr) is one of the modified biological treatment systems which is able to remove bod5, nitrogen, and phosphorus from wastewater. the object of this study is to determine the removal efficiency of nitrogen, phosphorus, and heavy metals from municipal wastewater by the advanced sbr system. methods: this descriptive-analytical and cross-sectional study was c...

Journal: :iranian journal of toxicology 0
مجید حسین زاده majid hosseinzadeh graduate faculty of environment, university of tehran, tehran, iran. غلامرضا نبی بیدهندی gholamreza nabi bidhendi graduate faculty of environment, university of tehran, tehran, iran. علی ترابیان ali torabian graduate faculty of environment, university of tehran, tehran, iran. ناصر مهردادی naser mehrdadi graduate faculty of environment, university of tehran, tehran, iran.

background: considering the toxic effects of heavy metals and microbial pathogens in industrial wastewaters, it is necessary to treat metal and microbial contaminated wastewater prior to disposal in the environment. the purpose of this study is to assess the removal of heavy metals pollution and microbial contamination from a mixture of municipal and industrial wastewater using membrane bioreac...

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...

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...

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