E3S Web Conf.
Volume 122, 20192019 The 2nd International Conference on Renewable Energy and Environment Engineering (REEE 2019)
|Number of page(s)||6|
|Section||Clean Energy and Energy Engineering|
|Published online||14 October 2019|
Iron Oxide-Coated Gravel Fixed Bed Column Study Performance to Remove Mixed Metals from Landfill Leachate
Khalifa University of Science and Technology, Chemistry Department,
P.O Box: 127788,
United Arab Emirates
2 Khalifa University of Science and Technology, Civil Infrastructure and Environmental Engineering Department, Abu Dhabi P.O Box: 127788, United Arab Emirates
* Corresponding author: email@example.com
Iron oxide-coated gravel as an adsorbent was employed in continuous fixed bed column study to remove Fe(II), Ni(II), and Zn(II) simultaneously in synthetic leachate samples. Experimental and modeled adsorption capacities derived from the breakthrough curves showed the adsorption capacity order of Zn(II)>Fe(II)> Ni(II). Iron oxide-coated gravel column removed 58.24% of Zn(II), 47.71% of Fe(II), and 39.45% of Ni(II). Desorption process was studied in order to test the regeneration capability of iron oxidecoated gravel. It was seen that 99.64 % of Ni(II), 99.54% of Fe(II) and 6.75% of Zn (II) were recovered through the first cycle of adsorption/desorption. In the second cycle, the recovery rates dropped to 81.4% for Ni(II), 80% for Fe(II) and 4% for Zn(II). Based on these results, iron oxide coated gravel has potential to remove mixed metal ions simultaneously in aqueous solutions.
© The Authors, published by EDP Sciences, 2019
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