Using selective sequential extraction techniques to evaluate tendency of soil fractions in Cd removal by Fe3O4 nanoparticles in continuous flow system
- سال انتشار: 1397
- محل انتشار: مجله معدن و محیط زیست، دوره: 9، شماره: 2
- کد COI اختصاصی: JR_JMAE-9-2_016
- زبان مقاله: انگلیسی
- تعداد مشاهده: 269
نویسندگان
Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran
Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran
Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran
Department of Mining Engineering, Faculty of Engineering & Technology, Tarbiat Modares University, Tehran, Iran
چکیده
Use of nanotechnology has proven to be a promising approach toward remediation of all phases of environment. The aim of this work is to investigate the effects of different parameters on using iron III oxide nanoparticles in a continuous flow configuration for the removal of Cd2+ ionsfrom contaminated soils. Also selective sequential extraction tests are carried out to evaluate the nanoparticle tendency to remove cadmium from different fractions of soils. In order to achieve this goal, a specific flow rate of a nanoparticle solution was passed through a soil sample in a column with 3 cm diameter and 4 cm height. Up to 100% of cadmium removal was achieved by providing a nano-fluid concentration of 500 ppm, pH of 6.5, treatment duration of 24 hours, and flow rate of 0.5 mL/min. Evaluation of the results obtained showed that the tendency of the iron oxide nanoparticles to remove cadmium from different fractions of contaminated soil was in the order of exchangeable > carbonates > oxides and hydroxides > organic matter > residual. The results obtained from this work can be used to develop an appropriate remediation protocol for contaminated soils.کلیدواژه ها
Selective Sequential Extraction, Iron(III) Oxide Nanoparticles, Continuous Flow Configuration, Cd2+ Removalاطلاعات بیشتر در مورد COI
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