عرض بسيط للتسجيلة

المؤلفAlimohammadi, Mahmood
المؤلفSaeedi, Zhyar
المؤلفAkbarpour, Bahman
المؤلفRasoulzadeh, Hassan
المؤلفYetilmezsoy, Kaan
المؤلفAl-Ghouti, Mohammad A.
المؤلفKhraisheh, Majeda
المؤلفMcKay, Gordon
تاريخ الإتاحة2020-10-01T05:53:34Z
تاريخ النشر2017
اسم المنشورWater, Air, and Soil Pollution
المصدرScopus
الرقم المعياري الدولي للكتاب496979
معرّف المصادر الموحدhttp://dx.doi.org/10.1007/s11270-017-3607-y
معرّف المصادر الموحدhttp://hdl.handle.net/10576/16326
الملخصThe study is a first-time investigation into the use of Eucalyptus leaves as a low-cost herbal adsorbent for the removal of arsenic (As) and mercury (Hg) from aqueous solutions. The adsorption capacity and efficiency were studied under various operating conditions within the framework of response surface methodology (RSM) by implementing a four-factor, five-level Box–Wilson central composite design (CCD). A pH range of 3–9, contact time (t) of 5–90 min, initial heavy metal (As or Hg) concentration (C 0) of 0.5–3.875 mg/L, and adsorbent dose (m) of 0.5–2.5 g/L were studied for the optimization and modeling of the process. The adsorption mechanism and the relevant characteristic parameters were investigated by four two-parameter (Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich) isotherm models and four kinetic models (Lagergren’s pseudo-first order (PFO), Ho and McKay’s pseudo-second order (PSO), Weber–Morris intraparticle diffusion, and modified Freundlich). The new nonlinear regression-based empirical equations, which were derived within the scope of the study, showed that it might be possible to obtain a removal efficiency for As and Hg above 94% at the optimum conditions of the present process-related variables (pH = 6.0, t = 47.5 min, C 0 = 2.75 mg/L, and m = 1.5 mg/L). Based on the Langmuir isotherm model, the maximum adsorption or uptake capacity of As and Hg was determined as 84.03 and 129.87 mg/g, respectively. The results of the kinetic modeling indicated that the adsorption kinetics of As and Hg were very well described by Lagergren’s PFO kinetic model (R 2 = 0.978) and the modified Freundlich kinetic model (R 2 = 0.984), respectively. The findings of this study clearly concluded that the Persian Eucalyptus leaves demonstrated a higher performance compared to several other reported adsorbents used for the removal of heavy metals from the aqueous environment.
راعي المشروعFunding Information The authors would like to thank Tehran University of Medical Sciences for financial support.
اللغةen
الناشرSpringer International Publishing
الموضوعArsenic and mercury adsorption
Eucalyptus leaves
Heavy metal removal
Isotherm models
Kinetic models
العنوانAdsorptive Removal of Arsenic and Mercury from Aqueous Solutions by Eucalyptus Leaves
النوعArticle
رقم العدد11
رقم المجلد228
dc.accessType Abstract Only


الملفات في هذه التسجيلة

الملفاتالحجمالصيغةالعرض

لا توجد ملفات لها صلة بهذه التسجيلة.

هذه التسجيلة تظهر في المجموعات التالية

عرض بسيط للتسجيلة