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مرکز اطلاعات علمی SID1
مرکز اطلاعات علمی SID
اسکوپوس
مرکز اطلاعات علمی SID
ریسرچگیت
strs
اطلاعات دوره: 
  • سال: 

    1394
  • دوره: 

    0
  • شماره: 

    5
تعامل: 
  • بازدید: 

    131
  • دانلود: 

    300
چکیده: 

در این مقاله با بررسی انواع روش های زیست پالایش و بیان معایب و مزیت های آن ها، راه کاری حذف جیوه (یکی از مضرترین مواد آلاینده) بیان می گردد. این روش یکی از کم هزینه ترین روش های حذف جیوه می باشد. فرایندهای زیست پالایی در مقایسه با سایر تکنیک های پالایش و پاکسازی به عنوان موارد کارآمدتری شناخته می شوند...

آمار یکساله:  

بازدید 131

دانلود 300
نویسندگان: 

RON E.Z. | ROSENBERG E.

اطلاعات دوره: 
  • سال: 

    2002
  • دوره: 

    13
  • شماره: 

    3
  • صفحات: 

    249-252
تعامل: 
  • استنادات: 

    315
  • بازدید: 

    5303
  • دانلود: 

    9195
کلیدواژه: 
چکیده: 

آمار یکساله:  

بازدید 5303

دانلود 9195 استناد 315 مرجع 0
نویسندگان: 

WATANABE K.

اطلاعات دوره: 
  • سال: 

    2001
  • دوره: 

    12
  • شماره: 

    3
  • صفحات: 

    237-241
تعامل: 
  • استنادات: 

    315
  • بازدید: 

    7638
  • دانلود: 

    9195
کلیدواژه: 
چکیده: 

آمار یکساله:  

بازدید 7638

دانلود 9195 استناد 315 مرجع 0
گارگاه ها آموزشی
نویسندگان: 

HAGHOLLAHI A. | Fazaelipoor M.H. | Schafie M.

اطلاعات دوره: 
  • سال: 

    2017
  • دوره: 

    8
  • شماره: 

    3
  • صفحات: 

    234-238
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    13648
  • دانلود: 

    7714
چکیده: 

This research work demonstrates the feasibility of accelerating bioremediation of a clay soil by supplementing with (NH4)2SO4, KH2PO4, sucrose (as an inducer for growth) and tween 80. The soil contained 7% residual gasoil. The bioremediation was stimulated by moisture adjustment to 10%, and inoculating with hydrocarbon degrading microorganisms. (NH4)2SO4 and KH2PO4 were added to the soil to obtain soil samples with C: N: P ratios of 100: 1. 4: 1. 4, 100: 6. 4: 1. 9, 100: 11. 4: 2. 4, and 100: 21. 4: 3. 4. The C: N: P of 100: 11. 4: 2. 4 resulted in more than 78% gasoil removal for duration of two months. Tween 80, in the range of 0-20mL/ (kg soil), was added to the soil samples with C: N: P ratio of 100: 1. 4: 1. 4. More than 84% removal was achieved when 10 mL/kg tween 80 was added to the soil. Sucrose, in the range of 0-20 g/(kg soil), was added to the soil samples with the C: N: P ratio of 100: 1. 4: 1. 4. For the sucrose level of 20 g/(kg soil), 79% removal was obtained in two months. Additional experiment was also conducted at two porosity levels of 54% and 22%. The removal percentage in the soil with high porosity was almost twice as compared to soil with low porosity.

آمار یکساله:  

بازدید 13648

دانلود 7714 استناد 0 مرجع 0
نویسندگان: 

اطلاعات دوره: 
  • سال: 

    2020
  • دوره: 

    13
  • شماره: 

    2
  • صفحات: 

    138-155
تعامل: 
  • استنادات: 

    315
  • بازدید: 

    197
  • دانلود: 

    9195
کلیدواژه: 
چکیده: 

آمار یکساله:  

بازدید 197

دانلود 9195 استناد 315 مرجع 0
اطلاعات دوره: 
  • سال: 

    2013
  • دوره: 

    0
  • شماره: 

    6
تعامل: 
  • بازدید: 

    1365
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

NITRATE CONTAMINATION OF GROUNDWATER IS AN IMPORTANT ISSUE WHICH POSES A GREAT DANGER TO HUMAN LIVES [1]. NITRATE MAY CAUSE GASTRIC CANCER BY REDUCING TO NITROSAMINES [2]. IN ADDITION, THE NITRITE REACTS WITH THE HEMOGLOBIN IN BLOOD AND CONVERTS THE HEMOGLOBIN INTO METHEMOGLOBINWHICH DOES NOT CARRY OXYGEN TO CELL TISSUES [3]. THEREFORE, REMOVAL OF NITRATE FROM WATER RESOURCES IS A CHALLENGING PROBLEM. THE MOST COMMON CONVENTIONAL TREATMENT PROCESSES ARE REVERSE OSMOSIS (RO)[4], ION EXCHANGE (IE)[5] AND ELECTRO-DIALYSIS (ED)[6]. AS THESE METHODS ARE RELATIVELY COSTLY AND PRODUCE WASTE BY-PRODUCTS, IT IS IMPORTANT TO FIND ALTERNATIVES FOR NITRATE REMOVAL [1].BIOLOGICAL METHODS, SUCH AS MICROALGAL TREATMENT, PROVIDE A PROMISING STRATEGY FOR NITRATE bioremediation FROM WATER RESOURCES WITHOUT SECONDARY POLLUTION. MICROALGAE CONSUME LARGE AMOUNTS OF NITRATE THAT ARE CONVERTED INTO BIOMASS, THEREBY MAKING THESE SPECIES ATTRACTIVE FOR POLLUTION REDUCTION OF WATERS. IN THIS STUDY, WE USED CHLORELLA VULGARIS FOR NITRATE REMOVAL USING BG11 MEDIUM UNDER 4000LUX LIGHT INTENSITY AT 27ºC. THIS ALGAE SPECIES WAS ABLE TO REDUCE NO3- FROM 1500PPM TO 52 PPM IN 3DAYS. FURTHERMORE, THE NITRATE REMOVAL EFFICIENCY OF 96% AND BIOMASS CONCENTRATION OF 0.87GL-1 WERE OBTAINED. IN ADDITION, THE EFFECT OF BUFFER (HEPES) ON ALGAL GROWTH AND NITRATE REMOVAL WAS INVESTIGATED. THE RESULTS SHOWED THAT BUFFER DOES NOT AFFECT ALGAL GROWTH AND NITRATE REMOVAL EFFICIENCY. THE DATA SHOWED THAT CHLORELLA VULGARIS HAS HIGH CAPABILITY FOR NITRATE bioremediation.

آمار یکساله:  

بازدید 1365

دانلود 0
strs
نویسندگان: 

اطلاعات دوره: 
  • سال: 

    2019
  • دوره: 

    241
  • شماره: 

    -
  • صفحات: 

    156-166
تعامل: 
  • استنادات: 

    315
  • بازدید: 

    5280
  • دانلود: 

    9195
کلیدواژه: 
چکیده: 

آمار یکساله:  

بازدید 5280

دانلود 9195 استناد 315 مرجع 0
اطلاعات دوره: 
  • سال: 

    2013
  • دوره: 

    0
  • شماره: 

    6
تعامل: 
  • بازدید: 

    1365
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

THE KYOTO PROTOCOL WAS SIGNED BY 170 COUNTRIES IN 1997 TO REDUCE GREENHOUSE GASES BY 5.5% BASED ON EMISSION IN 1995. CARBON DIOXIDE, THE PROMINENT GREENHOUSE GAS, IS THE NUMBER ONE CAUSE OF GLOBAL WARMING. THE CO2 REMEDIATION CAN BE ACCOMPLISHED IN THREE METHODS; (1) CHEMICAL-BASED STRATEGIES INCLUDING WASHING WITH ALKALINE SOLUTIONS [1], MULTIWALLED CARBON NANOTUBES [2], AND AMINE COATING ACTIVATED CARBON [3]. THE SECOND METHOD OF CO2 REMEDIATION IS DIRECT INJECTION TO THE OCEAN [4]. THESE TWO NON-BIOLOGICALMETHODSARE RELATIVELY COSTLY AND ENERGY INTENSIVE. WE, THEREFORE, CONSIDERED BIOLOGICAL CO2 MITIGATION AS A GOOD ALTERNATIVE METHOD. AMONG DIFFERENT BIOLOGICAL METHODS, MICROALGAE HAVE SHOWN HIGH CAPABILITY FOR CARBON DIOXIDE bioremediation FROM THE ATMOSPHERE AND PRODUCE HIGH AMOUNT OF BIOMASS. IN THIS STUDY WE USED CHLORELLA VULGARIS TO INVESTIGATE CARBON DIOXIDE REMOVAL AND BIOMASS PRODUCTION THAT CAN BE USED AS HUMAN NUTRIENT AND ANIMAL FEED [5]. APPROXIMATELY 6% CO2 WITH AERATION RATE OF 1VVM UNDER 4000LUX LIGHT INTENSITY AT 27ºC WAS USED TO CULTIVATE CHLORELLA VULGARIS. BY THIS STUDY, 0.126GL-1D-1CO2 FIXATION RATE, 1.1GL-1 BIOMASS CONCENTRATION, AND 0.078GL-1D-1 BIOMASS PRODUCTIVITY WERE OBTAINED. ADDITIONALLY, MONITORING THE PH OF THE MEDIUM DURING THE EXPERIMENT SHOWED AN INCREASE FROM 5.46 TO 8. IT WAS ALSO OBSERVED THAT ALGAL GROWTH RATE ROSE BY INCREASING THE PH. THE RESULTS INDICATE THAT CHLORELLA VULGARIS HAS A HIGH CAPABILITY FOR CARBON DIOXIDE bioremediation.

آمار یکساله:  

بازدید 1365

دانلود 0
اطلاعات دوره: 
  • سال: 

    2002
  • دوره: 

    26
  • شماره: 

    B2
  • صفحات: 

    0-0
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    10415
  • دانلود: 

    9195
چکیده: 

A mathematical model has been developed and simulated to describe contaminated soil bioremediation. The model equations consist of a system of three nonlinear partial differential equations. Dimensional analysis of the model equations has been performed, and solution of these equations has been conducted by an implicit finite difference method. A computer program is runed for solving the model equations and by using this program, the influence of the principal parameters (porosity, soil aggregate radius, and partition coefficient of the substrate) on the fate of chemicals has been studied. The rates of substrate, oxygen diffusion and biodegradation rate have been found to be the controlling mechanisms for remediation in the aggregates.

آمار یکساله:  

بازدید 10415

دانلود 9195 استناد 0 مرجع 0
نویسندگان: 

VOSOUGHI M. | MOSLEHI P. | AALEMZADEH I.

اطلاعات دوره: 
  • سال: 

    2005
  • دوره: 

    18
  • شماره: 

    1 (TRANSACTIONS B: APPLICATION)
  • صفحات: 

    1-8
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    17161
  • دانلود: 

    10376
چکیده: 

The amount of petroleum hydrocarbon and heavy metals in sediment of Persian Gulf’s shore at 8 selected stations were determined and showed the maximum of 143.6 and 58.6 mg/kg sediment, respectively. The above maximum amounts were related to Emam Hassan zone which is located at 50 kilometers to west Boushehr port. bioremediation of contaminated sediment were studied in slurry and solid state fermentation. 8 bacteria types were isolated. Four species Em2, SH, GN1 and GN3 presented maximum PAH (Poly Aromatic Hydrocarbons) removal efficiency. Biodegradation efficiency under slurry conditions was observed after about 45 days which during this period, naphthalene and phenanthrene showed 73 and 66% removal efficiency, respectively. Under solid-state conditions, microbial activity of mixed and pure culture was studied. The results presented that the mixed culture due to strength and tolerance of different strains for growth, showed higher degradability compared to pure strains, but due to insufficient mixing under solid state conditions, mass transfer rate of nutrient reduced which caused to reduce cell activity, therefore removal efficiency under slurry conditions was higher.

آمار یکساله:  

بازدید 17161

دانلود 10376 استناد 0 مرجع 0
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