سینتیک جذب آنیون های نیترات و فسفات توسط دو گونه جلبک تک سلولی و میکروسکوپی Dunaliella tertiolecta و Chlorella vulgaris در اکوسیستم های آبی
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۱۳۵ ص.
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:، جدول، نمودار، عکس، لوح فشرده
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چاپی
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واژه نامه بصورت زیرنویس
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کتابنامه ص.: ۱۳۰-۱۳۴
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کارشناسی ارشد
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مهندسی کشاورزی-خاکشناسی
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۱۳۸۶/۰۶/۲۵
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SUMMARY OR ABSTRACT
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Nitrate and phosphate ions are tainted chemicals which enter underground and ground water resources through the agricultural drainage, industrial and urban wastewaters. In recent years, application of microalga, macroalga and photosynthetic bacteria for treatment of the tainted ions is growing because they could absorb and assimilate the ions with more efficiency and lower costs compare to the other organisms. Laboratory and pilot scales studies have shown optimistic results. In this research, the nitrate and phosphate uptake kinetics in a simulated artificial media similar to underground water in different concentrations (includes 50,75,100,125,150,250 and 300 mg No3-L-1 and rate of phosphate was N:P=20:1) were investigated using Chlorella vulgaris unicellular microalgae in batch culture method and four repetition. Growth condition includes: light intensity: about 100 ?mol photon m-2s-1 , tempretuer: 24/5 ?C , round shaking: 150 rpm , primary pH: 6/5. The results showed that inspite of severe growth limitation presented in the batch culture condition of the Erlenmeyer (especialy pH increasing) during 6 days, amount of nitrate ion decreased to under standard limit (25 mg No3-L-1) in three concentrations includes 50, 75 and 100 mg No3-1L-1, but in other nitrate concentrations the period of nitrate removal increase to 8 to 10 days. Phosphate ion decreased to standard limit (0.95 mg PO4-3L-1) in all concentrations in application periods. Also the experiment was carried out for treatment of 250 mg No3-L-1 by using photobioreactor. Growth condition for photobioreactor includes: about 100 ?mol photon m-2s-1 , tempretuer: 24/5 ?C , round shaking: 140 rpm , constant pH: 6/5, aeration: 4 v/v, in 6 days and one repetition. In that condition total nitrate and phosphate ions decreased to under their standard limits during 6 days