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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Soybean oil,Canola oil,Lipid changes,Chicken frankfurter,Refrigerated storage
- چکیده: دو بهر فرانکفورتر حاوی 55 درصد گوشت مرغ با دو نوع روغن مختلف (حاوی روغنهای کانولا و سویا) تولید شدند. بهر 1 حاوی روغن کانولا و بهر 2 حاوی روغن سویا بود. آنالیزهای مختلفی برای تعیین تغییرات لیپید در هر دو بهر در طول نگهداری انجام شد. آنالیز ترکیب اسیدهای چرب با استفاده از کروماتوگرافی گازی تغییرات کمی را در اسیدهای چرب هر یک از بهرها در طول زمان نشان داد. از نقطهنظر تغذیهای، بهر 1 حاوی خواص بهتری در طول نگهداری بود. آنالیز شیمیایی واکنشهای اکسیداسیون نظیر پراکسید و TBA (تیوباربیتوریک اسید) و آنالیز اسیدهای چرب آزاد را در بر میگرفت. هر یک از آزمونهای شیمیایی روند متفاوتی در طول زمان داشت اما هر دو بهر در تمام زمانهای آزمایش مقادیر کمتری از سطح بیشینه داشتند. در ارتباط با آنالیز میکروبی، باکتریهای سرماگرا در هر دو بهر روند رو به کاهشی تا روز 30 داشتند و پس از آن رشد میکروبی افزایش یافت. در بهر 1 تفاوت معنیدار تنها در روز 1 مشاهده شد اما تفاوتهای معنیدار در بهر 2 بیشتر بود و تفاوتهای معنیدار در روزهای 15، 30 و 45 مشاهده شد. همچنین شمارش لاکتوباسیلها پس از پخت تا انتهای نگهداری معنیدار نبود (بعد از فرایند پخت رشد میکروبی قابل تعیین نبود). در انتهای نگهداری این نتیجه حاصل شد که بهر 1 کیفیت بالاتر و پایداری بیشتری نسبت به بهر 2 داشت و روغن کانولا میتواند جایگزین مناسبی برای روغن سویا در فراوردههای گوشتی باشد.
- چکیده انگلیسی: Two batches of frankfurters containing about 55% chicken meat with two different oils (including canola
and soybean) were manufactured. Batch 1 included canola oil and Batch 2 included soybean oil in the
products. Various analyses were performed to detect the lipid changes of both batches during storage. Fatty
acid composition analysis using gas chromatography showed little change in the fatty acids of either batch
over time. From a nutritional viewpoint, Batch 1 was more acceptable over time than Batch 2. Chemical
analysis included oxidation reactions, such as peroxide and TBA (Thiobarbituric acid) value and free fatty
acid analysis. Each chemical experiment had different trends at each time,but both batches had values lower
than the maximum levels at all times. With regard to microbial analysis, psychrotrophic bacteria in both
batches showed a decreasing order until day 30, and then growth increased. In Batch 1, a significant
difference was observed only on day 1, but the differenceswere more significant in Batch 2, and there were
significant differences on days 15, 30 and 45. Also, Lactobacilluscounts were not significant after the
cooking process until the end of storage (growth was not detectable after the cooking process). At the end of
storage, we concluded that Batch 1 had a higher quality and storage stability than Batch 2 and canola oil
could be a good substitution for soybean oil in meat products. The data were analyzed with GLM (repeated
measures). Differences were reported as significant at P<0.05. Also, the statistical software was SPSS ver.
11.5.- انتشار مقاله: 23-06-1388
- نویسندگان: R. Khaksar,M. Moslemy,H. Hosseini,A. Taslimi,A. Ramezani,Z. Amiri,A. Sabzevari
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Veterinary Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Bacillus cereus,Listeria monocytogenes,Rutilus frisii kutum,bacteriocin,Clostridium perfringens
- چکیده: باکتریوسینها ترکیبات پروتئینی ضد باکتریایی هستند که اثر بازدارندگی بر فعالیت سویههای نزدیک به سویه تولید کننده باکتریوسین دارند. هدف از این تحقیق، بررسی تولید باکتریوسین توسط Bacillus spp.جدا شده از محتویات روده ماهی سفید بود. یک باکتریوسین تولیدی توسط باکتری Bacillus cereus RF 140 مشخص شد. فعالیت ضد میکروبی سویه باکتریایی در مرحله رشد انفجاری (Exponential growth phase) شروع و بیشترین میزان فعالیت در مرحله سکون رشد (Stationary growth phase) مشاهده شد. باکتریوسین خام به وسیله فیلتر مایع رویی حاصل از کشت باکتری تهیه و فعالیت بازدارندگی آن علیه چندین سویه باکتریایی شاخص نظیر لیستریا منوسیتوژنز، کلستریدیوم پرفرینجنس و چندین سویه از باسیلوسها سنجیده شد. فعالیت بازدارندگی باکتریوسین در دمای 80 درجه سانتیگراد همچنان ادامه داشت اما میزان فعالیت بازدارندگی آن پس از رسیدن به دمای 100 درجه سانتیگراد کاهش یافته و در دمای 121 درجه سانتیگراد به طور کامل از بین رفت. همچنین باکتریوسین تولیدی توسط Bacillus cereus نسبت به آنزیمهای پروتئولیتیک پروتئیناز k، پروناز E و تریپسین حساس بود، اما در مقابل آنزیمهای آلفا آمیلاز، کاتالاز و پاپائین از خود مقاومت نشان داد. بیشترین میزان فعالیت بازدارندگی باکتریوسین در دامنه pH حدود 4 تا 9 بود. این مطالعه اهمیت باکتریوسین تولید شده توسط Bacillus cereus را به واسطه داشتن اثر بازدارندگی بر پاتوژنهای مهم در صنایع غذایی نظیر Listeria monocytogenes و Clostridium perfringens بیان میدارد که میتواند ابزار بیولوژیکی مناسبی برای کنترل باکتریهای عامل فساد و بیماریزا در محصولات غذایی باشد.
- چکیده انگلیسی: Bacteriocins are proteinaceous antibacterial compounds that exhibit bactericidal activity against species closely related to the producer strain. The aim of this research was to investigate the production of bacteriocin by Bacillus spp. isolated from intestinal bacterial flora of the Caspian Frisian Roach (Rutilus frisii kutum). A bacteriocin produced by the bacterium Bacillus cereus strain RF 140 was identified. The antimicrobial activity started at the exponential growth phase and maximum activity was at the stationary growth phase. A crude bacteriocin obtained from culture supernatant fluid was inhibitory to indicator strains,including Listeria monocytogenes, Clostridium perfringens, and several species of Bacillus. Bacteriocin was stable at 80°C, but the activity decreased and was lost when the temperature reached 100 and 121°C, respectively. It was resistant to the proteolytic action of papain, catalase and amylase, but sensitive to proteinase K, pronase E and trypsin. Maximum bacteriocin activity was observed in the pH 4-9. This study indicates the importance of the bacteriocin produced by B. cereus strain RF 140 against food-borne pathogenic microorganisms such as L. monocytogenes and C. perfringens , and presents a potential for use as a biopreservative in food.
- انتشار مقاله: 20-05-1387
- نویسندگان: M. Ghanbari,M. Rezaei,M. Soltani,Gh. Shah-Hosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Background: The use of high-dose steroid therapy peri portoenterostomy may have a positive impact on the frequency of cholangitis and survival rate. Methods: A prospective study was conducted on two groups of patients (less than three months of age) suffering from biliary atresia from 1999 to 2005. The patients in group I (G I) were managed peri-operatively by high-dose methylprednisolone while the other group (G II) received low dose methylprednisolone only post-operatively (2mg/k/day for 1 month). Infants in GI (n=30) received methylprednisolone for 3 successive days before operation (10-8-6mg/kg/day), and 10 mg/k at the day of operation respectively. Thereafter the dose was tapered in the next successive 6 days by 8, 6, 5, 4, 3, and 2 mg/kg/day and continued for one month. Results: Seventy two infants with biliary atresia were operated (39 girls and 33 boys). Twenty-six of the 30 patients (86%) in G I became jaundice-free within 90 days after portoenterostomy while only seven (15%) of the 42 patients in G II had normal bilirubin (P<0.0001). Episodes of postoperative cholangitis in G I were 20% (6 of 30), and 53% (24 of 42) in G II (P<0.005). The difference in 3-year survival rate between the two groups is also remarkable: Eighty seven percent (26 of 30) in GI versus 29% (13 of 45) in G II (P<0.005). Death related to biliary atresia occurred in 1 (3.3%) patient in GI compared with 12 (29%) patients in G II (p<0.005). Conclusion: These results provide strong evidence that peri-operative high dose steroid therapy is not only safe in this patients population, but because of its anti-inflammatory and cholerrhetic effects has a positive impact on preventing recurrent cholangitis, and ultimately survival
- انتشار مقاله: 20-02-1394
- نویسندگان: Hamid Reza Foroutan,A.H. Hosseini,S.M. Dehghani,S.A. Banani,A. Bahador,M. Haghighat,M.H. Imanieh,R. Jalli,F. Gheisari
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Background: Chronic diarrhea is a common problem in patients with symptoms related to gastro-intestinal tract. Some of these patients present with chronic non-bloody, watery diarrhea and no specific clinical, laboratory, or endoscopic findings. The aim of the present study was to investigate the value of histological findings in patients with chronic diarrhea who have normal or non-specific endoscopic findings.We also determined the frequency and distribution of histological changes related to different anatomical sites in the colon. Methods: This study was performed in Kerman city on 90 patients with chronic watery diarrhea whose diseases had not been exactly diagnosed after extensive clinical, laboratory, and endoscopic studies.Laboratory tests including complete blood count, erythrocyte sedimentation rate, C-reactive protein, stool examination, thyroid and liver function tests, and serologic study for celiac disease were all normal in this group of patients. Colonoscopy was performed and mucosal biopsies were taken from rectosigmoid, descending, and transverse colon. Results: The histologic findings were as follows: 39 (43.3%) patients showed normal histology, 25 (27.8%) patients showed microscopic colitis, not otherwise specified form. Ten (11.1%) patients had classic lymphocytic colitis, and 15 (16.7%) patients had paucicellular lymphocytic colitis. One (1.1%) patient showed focal active colitis. None of them had collagenous colitis. Conclusion: Diagnostic histological findings were seen in 28.9% of biopsy samples in patients with chronic diarrhea and normal or near normal endoscopic findings.We recommend multiple punch biopsy sampling in such patients from different sites of the colon to avoid missing some cases of microscopic colitis.
- انتشار مقاله: 20-02-1394
- نویسندگان: H. Tabrizchie,Mohammad Javad Zahedie,M. Hayatbakhsh Abasie,E. Jafari,A. Haghdoost,S.H. Hosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Background: Dermatoglyphics are the dermal ridge configurations on the digits, palms and soles. Dermatoglyphic polymorphism results from the co-operation of genetic and environmental factors. The Dermatoglyphic analysis is a valuable completion of initial diagnosis of some syndromes genetically determined. Our objective was to assess dermatoglyphics study results against standard chromosomal analysis in Down and Klinefelter syndromes. Methods: In this study we applied clear plastic tape and graphite powder for finger and palm prints of 90 persons. Cytogenetic study was also performed for patients with Down (n=29) and Klinefelter (n=22) syndromes and 39 normal individuals who served as the control group. Results: Dermatoglyphic investigations indicated that in Down syndrome, simian line, ulnar loops, whorl, t'', t''' and t' were significant, whereas arch and interdigital III pattern were more indicative for Klinefelter syndrome. Conclusion: Dermatoplyphic can be used both as an initial diagnostic step and for screening purposes.
- انتشار مقاله: 04-03-1394
- نویسندگان: Mohammad Hassanzadeh Nazarabadi,R. Raoofian,R. Abutorabi,H.B. Hosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Background: About 40%-60% of schizophrenic patients are resistant to ordinary treatment, which result from interference with different neurotransmitter systems in the process of disease. The aim of present study was to determine the effect of famotidine on several symptoms of schizophrenia which was nonresponsive to neuroleptic treatment. Methods: 30 schizophrenic patients previously nonresponsive to ordinary treatment were categorized into two groups. Famotidine group received perphenazine plus famotidine and placebo group received perfenazine plus a placebo. Patients in both groups were followed for 6 weeks and assessed by the positive and negative symptom scales (PANSS) at weeks 0, 2 and 6 of the treatment. Results: Both groups were similar in terms of positive and negative symptoms. In the placebo group, the total scores of PANSS (severity of the disease) did not change significantly. However, based on the total scores of PANSS, there was a significant difference between both famotidine and placebo groups at the end of sixth week (P<0.05). In terms of general psychopathology scale and aggressive risk, there was also a significant difference between both famotidine and control groups at the end of sixth week. Conclusion: Famotidine can improve the symptoms of schizophrenic patients who were not responsive to neuroleptics.Iran J Med Sci 2005; 30(2): 59-62. Keywords ● Famotidine ● H2 receptor antagonists ● schizo-phrenia ● neuroleptics
- انتشار مقاله: 09-06-1394
- نویسندگان: D. Farzin,S.H. Hosseini,A. Shafaat
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: Background: Fungal corneal ulcer is the most dangerous and challenging type of infective keratitis. Since most of the ophthalmic antifungal drops are scarce and expensive in developing countries, attempts have been made to study fungicidal property of some readily available antiseptic agents as a substitute. Povidone iodine (PI) and chlorhexidine gluconate (CHx) has been postulated to be effective against fungi. Objective: To study in vitro antifungal efficacy of PI and CHx. Methods:Fungi isolated from cases of keratomycosis were entered in a prospective study from June 2001 to March 2002. In vitro susceptibility of these fungi was tested by broth dilution method of NCCLS Standard to PI (1%, 2%, 5%, 10%) and CHx (0.04%, 0.1%, 0.2%) after 5 minutes, 1 hr, 24 hrs and 48 hrs exposure times. Results: From a total of 16 culture-proven cases of fungal keratitis, the isolated fungi were 8 Aspergillus sp, 3 Fusarium sp, 2 sterile hyphae, 1 Candida sp, 1 Drechslera sp, 1 Rhodotorula sp. PI showed 100% fungicidal effect with all tested concentrations, after 5 minutes of exposure to all fungal species.CHx. 0.1% and 0.2% after ³1 hr exposure were as effective as PI (p>0.34). The fungicidal efficacy of CHx 0.1% and 0.2% was significantly less than PI after 5 minutes (p<0.001). Conclusion:Both PI and CHx have strong in vitro fungicidal effect. The kill rate of CHx, however, is less than PI. Since in vitro efficacy of topical ophthalmic preparations is affected by multiple factors, our study provides a good idea for further in vivo investigations about this subject.
- انتشار مقاله: 09-09-1394
- نویسندگان: H.R Jahadi Hosseini,Z. Ghaemi,A. Alborzi,MR Panjeshahin,MH. Roozitalab,A. Katbab,H. Khoshniat,H. Movahhedan,M. Nejabat,R. Salouti,B. Oboodi,Badiee Badiee
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Chemical Engineering(IJChE)
- نوع مقاله: Journal Article
- کلمات کلیدی: Numerical simulation,Fixed bed reactor,LTFT synthesis,mass transfer restrictions,2D-multiphase heterogeneous model
- چکیده:
- چکیده انگلیسی: Abstract
Gas to liquid (GTL) process involves heterogeneous catalytic chemical reactions that convert synthesis gas to hydrocarbons and water vapor. A three phase reactor, called Low temperature Fischer-Tropsch (LTFT) is commonly applied for GTL process. In this reactor the gaseous phase includes the synthesis gas, light hydrocarbons and water vapor, the liquid phase is a mixture of the heavy hydrocarbons, and the solid phase is composed of the catalyst and the waxy products. The presence of the liquid phase in LTFT reactor causes mass transfer restriction, affecting the reaction conversion. In this work a numerical simulation of the LTFT fixed bed reactor in trickle flow regime has been accomplished to understand the impact of the liquid phase on the reactor performance. For this purpose, we have developed an axisymmetric two-dimensional multiphase heterogeneous model, where contain carbon monoxide and hydrogen, are transferred into the liquid phase. The reactor consisted of a shell and a tube that was filled with the spherical cobalt catalyst. The reaction conditions were as follows: the wall temperature was 473 K, pressure was 20 bars and a gas hour space velocity (GHSV) was 111 Nml.g_cat^(-1).h^(-1). The numerical simulation results proved the negative impact of the liquid phase on the reaction conversion. The model predictions were evaluated against the reported experimental data and also compared with the result of a numerical pseudo-homogeneous model. It was found that applying the heterogeneous model instead of the pseudo-homogeneous model clearly decreases the deviation of the numerical results.- انتشار مقاله: 24-03-1395
- نویسندگان: H. Salimi,Sh. Shahhosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: Iran Agricultural Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Bagasse,Seedling growth,Soilless culture,Keywords:,Agricultural wastes,water holding capacity,Wood chips
- چکیده: چکیده-سیستمهای کشت بدون خاک برای رسیدن به عملکردبیشترباکیفیت بهتر، صرفه جویی در مصرف آب و زمین و حفاظت بهتر از محیطزیست به وجود آمدهاند. ظرفیت نگهداری پایین آب بسترهای مورد استفاده در سیستمهای کشت بدون خاک باعث افزایش هدررفت آب و تنش در این کشت ها میشود .تنظیم دور آبیاری و مدیریت محلول رسانی میتواند سبب کاهش مشکلات احتمالی گردد. در این تحقیق تلاش شده است تا بااستفاده از ضایعات کشاورزی و مواد آلی و مدیریت محلولدهی براساس ظرفیت نگهداری رطوبت بستر، بسترهای کشت مناسب جهت رشد نشاء گوجه فرنگی (Solanum Lycopersicon Mill) تهیه و عملکرد آنها بررسی گردد. جهت تهیه این بسترها باگاسنی شکر، پوست درخت بلوط و تراشه چوب صنوبر در نسبتهای حجمی مختلف با ماسه و پرلیت مخلوط و در قالب یک طرح کاملاتصادفی با 15تیمار و 3 تکرار و 6 مشاهده در کشت نشاء مورد آزمایش قرار گرفت. محلول غذایی براساس فرمول تهیه و درفرکانسهای زمانی مشخص در اختیارگیاه قرار گرفت، هر7 روز 90 نشاء برداشت و اثر بسترها مورد بررسی قرار گرفت. نتایج نشان داد بیشترین طول و قطرنشای گوجه فرنگی مربوط به تیمار 8 (S30P10T30B0C30) بود و از نظر بخش معدنی ماسه نسبت به پرلیت در افزایش شاخصهای رشد گیاه موثرتر بود. از نظر بخش آلینتایج نشان دهندهی مطلوب بودن پوست درخت نسبت به تیمارهای دیگر بود و تیمارهای حاوی باگاس کمترین وزن تر و وزن خشک اندام هوایی و ریشه را به خود اختصاص دادند. تیمارهای با ظرفیت نگهداری رطوبت 90-100% بهترین واکنش را نسبت به رشد گیاهچه های گوجه فرنگی نشان دادند.
- چکیده انگلیسی: ABSTRACT- Soilless cultivation systems are used to attain higher performance, improve crop quality, conserve water and land, and protect the environment better. This study has attempted to use some agricultural wastes and organic matter, and management practices to optimize water holding capacity of cultural media, which are suitable for the growth of tomato seedlings (Solanum lycopersicum.). Fifteen different substrate (growth media) mixtures with a mineral fraction (sand and perlite) and organic fractions (bagasse, oak tree bark, poplar wood chips) were prepared and compared. Sand (2-4mm) and perlite (4-6 mm) were mixed at 0, 10, 20, 30 and 40 percent volume ratios with organic fractions at 0, 30 and 60 percent. The experiment was arranged in a completely randomized design with 15 treatments and 3 replications with 6 observations per treatment. During the seedling growth period (45 days), every 7 days, 90 seedlings were harvested (data for three periods were used) to determine the effect of the growth media on different growth parameters(plant dry matter and leaf area) and indices (RGR, NAR, and SER). The growth rate of tomato seedlings generally increased over time the rate of which varied with treatments. Seedling height, stem diameter, plant fresh weight and dry matter indicated that the highest length (25.91 cm) and diameter (4.83 cm) of the tomato seedlings was in treatment eight (S30P10T30B0C30). It was also shown that the sand fraction as a mineral component had a better performance compared to perliter in growth parameters. For the organic component of the growth media, tree bark treatments were better than wood chips or bagasse. The bagasse treatment had the lowest fresh weight and dry weight of shoot and root. The treatments with water holding capacity of 90-100% showed the best response in the growth of tomato seedlings.
- انتشار مقاله: 24-07-1393
- نویسندگان: H. MirseyedHosseini,E. Alavipoor,M. Delshad
- مشاهده
- جایگاه : پژوهشی
- مجله: Iran Agricultural Research
- نوع مقاله: Journal Article
- کلمات کلیدی: leachate,Soil,Wastewater,adsorbent,Keywords:,Land treatment
- چکیده: چکیده- همانطور که جمعیت جهان در حال رشد بوده و شهر نشینی و رفاه افزایش یافته ، تولید زباله نیز به شدت در حال افزایش می باشد. استفاده مجدد ازفاضلاب به عنوان یک راهکار برای کاهش کمبود آب، بهبود تولید محصول و پایداری محیط زیست شناخته شده است. به جهت بررسی این مسئله، آزمایش ستون خاک براساس طرح بلوک تصادفی فاکتوریل 3×3 شامل سه تیمار جاذب (شیرابه بدون پیش تصفیه (L1)، شیرابه عبور نموده از پوسته برنج (L2)، شیرابه عبور نموده از کربن فعال (L3)) و سه سطح زئولیت (0، 5 و 10 % وزنی خاک) انجام پذیرفت. حجم آب زهکشی شده در طول آزمایش کاهش یافت. کاربرد سطح 5% زئولیت کارایی برداشت خاک را می تواند بهبود بخشد و اثر مثبتی بر کیفیت زه آب دارد. همچنان که به صورت تغییرات در EC, Na+, Ca2++Mg2+Cl-(تا 22%، 15%، 24%، %15 کاهش یافته) و فسفر کل (تا 12% افزایش یافته) در تیمار شیرابه نشان داده شده است. اما افزودن 10% زئولیت تفاوت معنی داری نداشت (05/0p<). جاذب های مورد استفاده در این آزمایش اثر معنی داری بر پارامتر هایی مانند N-NH4+, SAR، فسفر کل و مقدار سدیم داشتند. تغییرات در اغلب پارامترها در تیمار L3از نظر آماری به طور معنی دار (05/0p <) در مقایسه با دیگر شیرابه ها (( N-NH4+(40%) و فسفر کل (33%) بیشتر و Ca2++Mg2+(3/14%) و سدیم (14%) کمتر) متفاوت بود، که نشان دهنده افزایش کارایی جاذب ناشی از فعال سازی پوسته برنج می باشد. کاربرد زئولیت می تواند کارایی برداشت خاک را برای تیمار شیرابه بهبود بخشد، اما سطوح کاربرد بسته به خاک و نوع زئولیت متفاوت خواهد
- چکیده انگلیسی: ABSTRACT- As the world's population has grown and become more urban and affluent, waste production has raised drastically. Wastewater reuse has been identified as a way to alleviate water scarcity and improve crop productivity and environmental sustainability. To address the issue, a soil column experiment was carried out in a 3 × 3 factorial randomized block design including three treatments of adsorbents (non-pretreated leachate (L1), rice husk filtered leachate (L2), activated carbon filtered leachate (L3)) and three levels of zeolite (0, 5 and 10% by soil weight).A decrease in drainage water volume through the experiment period was observed. Application of zeolite at 5% level could improve soil removal efficiency and had a positive impact on the quality of the wastewater, as indicated by changes in EC, Na+, Ca2++Mg2+, Cl- (decreased by 22%, 15%, 24%, 15% respectively) and total P (increased by 12%) for treatment of leachate. However, adding 10% zeolite did not make a significant difference (p<0.05). Adsorbents used in the experiment had a significant effect (p<0.05) on the parameters such as N-NH4+, SAR, total P and Na+ content. Changes in most parameters for the L3 treatment were statistically significant (p<0.05) compared to other leachates (less N-NH4+ (40%), total P (33%) and more Ca2++Mg2+ (14.3%), Na+ (14%)) indicating an increase in adsorbent efficiency due to rice husk activation. Therefore, it can be concluded that application of zeolite can improve soil removal efficiency for treatment of leachate, but the rates of application can be case sensitive depending on the soil and the type of zeolite.
- انتشار مقاله: 07-07-1393
- نویسندگان: H. Mir Seyed Hosseini,R. Karimi,S. Bagheri Novair,H. Tabatabaei
- مشاهده