کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8047407 1519092 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption of phenols from olive oil waste waters on layered double hydroxide, hydroxyaluminium-iron-co-precipitate and hydroxyaluminium-iron-montmorillonite complex
ترجمه فارسی عنوان
جذب فنل ها از فاضلاب های روغن زیتون در هیدروکسید دو لایه ای، هیدروکسی آلومینیم آهن و کادمیوم و ترکیب هیدروکسی آلومینیم آهن مونتموریلونیت
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی
Olive mill waste water (OMWW) contains high concentrations of phenols that are responsible for the high toxicity of the effluent. A one step precipitation process of OMWW by cold methanol yielded a polymeric organic precipitate (polymerin) and a supernatant (OMWW-S) rich in phenols, which were further concentrated in an ethyl acetate extract (OMWW-E). This extract was comparatively adsorbed on: i) a layered double hydroxide of magnesium and aluminium (LDH); ii) the LDH after calcination at 450 °C (LDH-450); iii) a hydroxyaluminium-iron-co-precipitate (HyAlFe); and iv) a hydroxy-aluminium-iron-montmorillonite complex (HyAlFe-Mt). Adsorption behaviour and kinetics of phenols with these materials were investigated. The Langmuir model better described adsorption (R2 > 0.97) in comparison to the Freundlich model (R2 > 0.89). Phenols were sorbed according to the following order: LDH-450 > LDH > HyAlFe > HyAlFe-Mt. Phenol adsorption on LDH matrices was strong, since desorption with simulated soil solution under dynamic conditions never exceeded 20%. Cyclic adsorption conducted with LDH-450 removed most phenols, ~ 94% from OMWW-E, consequently reducing its phytotoxicity. The study evidenced that calcined LDH represented an effective remediation process for OMWW.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volumes 80–81, August 2013, Pages 154-161
نویسندگان
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