کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6580454 | 1422941 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrokinetic delivery of anodic in situ generated active chlorine to remediate diesel-contaminated sand
ترجمه فارسی عنوان
تحویل الکتروکینتیک آنودیک در محل تولید کلر فعال برای دفع شن و ماسه آلوده به دیزل است
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Electrokinetic in situ chemical oxidation (EK-ISCO) is an innovative and effective method for removing petroleum contaminants from soil. However, the high cost of exogenous oxidants is one of the main drawbacks of this technology. In this research, a new approach for the electrokinetic (EK) delivery anodic in situ generation of an oxidant was designed with the aim of solving this problem. Six EK experiments lasting 15 d with different electrolytes (NaCl or NaNO3) and different voltage potentials were performed in order to evaluate the feasibility of this approach. It was found that active chlorine was produced by a dimensionally stable anode and a NaCl solution, and can contribute to remediate sand spiked with diesel fuel (10â¯g/kg) during EK-ISCO. The obtained results showed that an increase in NaCl electrolyte concentration (from 10 to 40â¯g/L) increases the maximum concentration of active chlorine in the aqueous sand matrix (from 12.5 to 30â¯mmol/L). The diesel removal efficiencies were increased from 33% to 44% for 1â¯V/cm and from 43% to 67% for 2â¯V/cm, respectively, by using 20â¯g/L NaCl compared to using 20â¯g/L NaNO3. Vial tests also confirmed that the anodic in situ generated active chlorine in the electrolyte solution had the effect of oxidizing alkanes of diesel. The products had a higher solubility due to the inclusion of polar functional groups. Under optimal conditions, the energy consumption for removing 1% of contaminants was approximately 2â¯kâ¯Wh/ton. Consequently, the EK delivery of anodic in situ generated active chlorine can be considered as a new cost-effective method for removing organic contaminants from porous media.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 337, 1 April 2018, Pages 499-505
Journal: Chemical Engineering Journal - Volume 337, 1 April 2018, Pages 499-505
نویسندگان
Yue Song, Long Cang, Guodong Fang, Syed Tahir Ata-Ul-Karim, Hongting Xu, Dongmei Zhou,