کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7083352 1460007 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of fly ash and phosphatic rock on metal stabilization and bioavailability during sewage sludge vermicomposting
ترجمه فارسی عنوان
تأثیر خاکستر و خاک فسفات بر تثبیت فلزات و قابلیت زیستی در طول لجن فاضلاب ورمی کمپوستینگ
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Sewage sludge (SS) was mixed with different proportions of fly ash (FA) and phosphoric rock (PR), as passivators, and earthworms, Eisenia fetida, were introduced to allow vermicomposting. The earthworm growth rates, reproduction rates, and metal (except Zn and Cd) concentrations were significantly higher in the vermireactors containing FA and PR than in the treatments without passivators. The total organic carbon (TOC) and total metal concentrations in the mixtures decreased, and the mixtures were brought to approximately pH 7 during vermicomposting. There were significant differences in the decreases in the metal bioavailability factors (BFs) between the passivator and control treatments, and adding 20% FA (for Cu and Zn) or 20% PR (for Pb, Cd, and As) to the vermicompost were the most effective treatments for mitigating metal toxicity. The BF appeared to be dependent on TOC in the all treatments, but was not closely dependent on pH in the different vermibeds.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 136, May 2013, Pages 281-287
نویسندگان
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