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تغییرات کیفیت بیوچار تولید شده از کود گاوی در طی فرایند پیرولیز آهسته در دماهای مختلف | ||
تحقیقات آب و خاک ایران | ||
مقاله 5، دوره 47، شماره 2، مرداد 1395، صفحه 259-267 اصل مقاله (630.1 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2016.58332 | ||
نویسندگان | ||
مهدی بهشتی1؛ حسینعلی علیخانی* 2؛ بابک متشرع زاده3؛ لیلا محمدی4 | ||
1دانشجوی کارشناسی ارشد بیولوژی و بیوتکنولوژی خاک، بلوار امامزاده حسن، پردیس کشاورزی و منابع طبیعی | ||
2استاد گروه علوم و مهندسی خاک، پردیس کشاورزی و منابع طبیعی | ||
3دانشیار گروه علوم و مهندسی خاک، بلوار امامزاده حسن، پردیس کشاورزی و منابع طبیعی | ||
4بلوار امامزاده حسن، پردیس کشاورزی و منابع طبیعی | ||
چکیده | ||
به تازگی بیوچار به دلیل پتانسیل بهبود باروری خاک، غیر متحرک کردن آلودگیها و همچنین یک روش مناسب برای ترسیب کربن در خاک مورد توجه قرار گرفته است. در این تحقیق، از کود گاوی در دماهای مختلف در طی فرآیند پیرولیز آهسته (300،400، 500، 600 و 700 درجه سانتیگراد) و در شرایط بدون اکسیژن بیوچار تهیه گردید و خصوصیات فیزیکی و شیمیایی آن اندازهگیری شد. آزمایشهای لازم به منظور بررسی اثر درجه حرارت پیرولیز بر بیوچار حاصله و تعیین بهترین دمای پیرولیز برای تبدیل کود گاوی به بیوچار برای استفاده در کشاورزی انجام گردید. نتایج نشان داد با افزایش تدریجی دما بین 300 تا 700 درجه سانتیگراد، عملکرد بیوچار، محتوای نیتروژن کل و کربن آلی کاهش یافت در حالی که pH، قابلیت هدایت الکتریکی، محتوای خاکستر و پایداری کربن افزایش نشان داد. همچنین عملکرد بین 36/44- 14/22 درصد از ماده خام و پایداری کربن آلی بین 36/72-63/35 درصد تغییر کرد. حداکثر مقدار تبدیل کربن آلی ماده خام به کربن آلی پایدار در بیوچار در 500 درجه سانتیگراد رخ داد. برای استفاده کشاورزی بیوچار کود گاوی حاصله در دمای 400 درجه سانتیگراد و برای ترسیب کربن بیوچار 500 درجه سانتیگراد پیشنهاد میشود. | ||
کلیدواژهها | ||
بیوچار؛ ترسیب کربن؛ عملکرد بیوچار؛ پایداری کربن | ||
عنوان مقاله [English] | ||
Quality variations of cow manure biochar generated at different pyrolysis temperatures | ||
نویسندگان [English] | ||
Mehdi Beheshti1؛ Hoseinali Alikhani2؛ Babak Motesharezadeh3؛ Leila Mohammadi4 | ||
چکیده [English] | ||
Biochar has received great attention recently due to its potential to improve soil productivity and immobilize contaminants and is proper as a way of carbon sequestration in soil. In this study, biochar produced from cow manure by slow pyrolysis at different temperatures (300, 400, 500, 600, 700 ◦C) and their physicochemical properties were analysed. Experiments were conducted to examine the effect of pyrolysis temperature on the cow manure biochar and to identify the optimal pyrolysis temperature for converting cow manure to biochar with agricultural usage. The results showed that with an incremental increase in temperature from 300 to700 ◦C, biochar yield, total N content, and organic carbon (OC) decreased, while pH, EC, ash content, and OC stability increased. The yield and stable OC of biochar was observed between 22.14 to 44.36 % and 35.63 to 72.36 % respectively. To produce cow manure biochar of proper for agricultural applications and a carbon sequestration, temperatures 400 and 500 ◦C are recommended respectively. | ||
کلیدواژهها [English] | ||
Biochar, Carbon sequestration, Biochar Yeild, Carbon Stability | ||
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