The relationship between the characteristics of Biochar produced at different temperatures and its impact on the uptake of NO3
- سال انتشار: 1397
- محل انتشار: مجله مدیریت و مهندسی بهداشت محیط، دوره: 5، شماره: 2
- کد COI اختصاصی: JR_EHEM-5-2_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 435
نویسندگان
Department of Irrigation Engineering, Abouraihan Campus, University of Tehran, Iran
Department of Irrigation Engineering, Abouraihan Campus, University of Tehran, Iran
Seyyed Ebrahim Hashemi Garmdareh
Department of Irrigation Engineering, Abouraihan Campus, University of Tehran, Iran
Department of Irrigation Engineering, Abouraihan Campus, University of Tehran, Iran
چکیده
Nitrogen leaching from agricultural lands is a major threat to groundwater and surfacewaters. This study investigated the relationship between the characteristics of wheat-straw biocharproduced at different temperatures and its impact on the uptake of NO3--N.Methods: Three types of biochar were produced from wheat straw at three different pyrolysistemperatures of 300, 400 and 500°C, and sampling was done 3 times for each biochar. Physical andchemical characteristics of biochar were determined using a variety of methods including specific surfacewith methylene blue adsorption method, and elemental content with elemental analyzer, and watersolubility with standard ASTM (D5029-28) method. Statistical analysis was performed using Freundlichand Langmuir models. Nitrate concentration was measured using a UV-V spectrophotometer with awavelength of 500 nm.Results: It was indicated that with an increase in biochar pyrolysis temperature from 300 to 500°C, thehydrogen, oxygen and nitrogen in the biochar were significantly decreased (P < 0.05) while the carboncontent, surface area, density and water solubility in biochar (P < 0.05) were increased. The results alsoshowed that the maximum nitrate adsorptive capacity of the three types of biochar occurred at pH=6and contact time of 120 minutes. With increasing the temperature of biochar preparation, the efficiencyof biochar nitrate adsorption increased significantly.Conclusion: The present study shows that pyrolysis temperature greatly influences the biocharchemical and physical characteristics, and subsequently nitrate adsorption ability of the biochars. Thewheat straw biochar, which is produced at a pyrolysis temperature of 500°C, has the highest adsorptioncapacity for nitrate.کلیدواژه ها
Biochar, Nitrates, Adsorptionمقالات مرتبط جدید
- تاثیر عصاره آبی و الکلی میوه سماق بر روی تریکوموناس واژینالیس و کاندیدا آلبیکنس در شرایط برون تنی
- بررسی خواص فیکوسیانین بر مهار رشد سلول و مرگ سلولی در سرطان پروستات (رده سلولی LNCAP)
- ارزیابی آنتی ژن پروتواسکولکس کیست هیداتید بر القای آپاپتوز بر سل لاین MCF
- فراوانی ژن های انتروتوکسین sea ، seb و sec استافیلوکوکوس اورئوس در ناقلین سالم استان مازندران
- The effectiveness of technology-enhanced educational interventions in improving nursing care: a systematic review
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.