کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4997609 1459914 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Ethylenediamine-N,N′-disuccinic acid (EDDS) on the speciation and bioavailability of Fe2+ in the presence of sulfide in anaerobic digestion
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Effect of Ethylenediamine-N,N′-disuccinic acid (EDDS) on the speciation and bioavailability of Fe2+ in the presence of sulfide in anaerobic digestion
چکیده انگلیسی
The effects of a biodegradable chelating agent, Ethylenediamine-N,N′-disuccinic acid (EDDS), on the speciation and bioavailability of iron (Fe2+) in anaerobic digestion were examined. Fe2+ supplementation at 10 mg/L increased methane yield, but the presence of 8 mg/L sulfide led to the precipitation of Fe2+ as FeS which limited its bioavailability. The results confirmed that the EDDS could replace common chelating agents with low biodegradability (EDTA and NTA), and improve the bioavailability of Fe2+ by forming an Fe-EDDS complex, thereby protecting Fe2+ from sulfide precipitation. Experimental findings from sequential extraction using the Community Bureau of Reference (BCR) method, and quantification of free EDDS and Fe-EDDS complex using UHPLC, confirmed that 29.82% of Fe2+ was present in bioavailable forms, i.e. soluble and exchangeable, when EDDS was added at 1:1 molar ratio to Fe2+. As a result, the methane production rate increased by 11.17%, and the methane yield increased by 13.25%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 229, April 2017, Pages 169-179
نویسندگان
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