Evaluation of electrokinetics coupled with a reactive barrier of activated carbon loaded with a nanoscale zero-valent iron for selenite removal from contaminated soils

Shell biomass material supported nano-zero valent iron to remove Pb 2+ and Cd 2+ in water

“…In addition, the determination coefficient of the pseudo first-order kinetic was higher than that of pseudo secondorder and Elovich kinetic model for both Cd 2+ and Pb 2+ , which indicates that the physical adsorption is the rate-determining step [66]. It may be possible that the huge specific surface area of UVS material increases the contact area significantly between NZVI and the solution compared with other carrier materials and this advantage plays a decisive role in the adsorption process, which agrees with Huang et al [67].…”

A Novel Method for Treating Heavy Metal-Contaminated Soil: The Combined Electrokinetics and Permeable Reactive Barrier Technique

“…Using various barrier materials, PRB can remove a variety of pollutants. Commonly used materials include zero-valentiron (Fe(0)), activated carbon (AC), zeolite, lime, apatite, transformed red mud (TRM), and biologically reactive materials (Zijlstra et al, 2010;Vermeul et al, 2014;Ranjbar et al, 2017;Vukojević Medvidović et al, 2018;Gibert et al, 2019;Grau-Martí nez et al, 2019;Huang et al, 2019). Pollutants that can be removed with the PRB technique include organic pollutants such as chlorinated hydrocarbons, polychlorinated biphenyls, polyaromatic hydrocarbons, and the benzene series (Chang and Cheng, 2006;Chen et al, 2011;Du et al, 2013; heavy metal and metalloid pollutants including nickel (Ni), copper (Cu), zinc (Zn), lead (Pb), Cd, selenium (Se), arsenic (As), chromium (Cr), and mercury (Hg) (Huang et al, 2015;Robles et al, 2015;Han et al, 2016;Ranjbar et al, 2017;Medvidović et al, 2018;Huang et al, 2019;Xu et al, 2019); radioactive materials such as caesium-137 and strontium-90 (Vermeul et al, 2014;Torres et al, 2017); and inorganic salt pollutants such as nitrate (Li et al, 2017;Gibert et al, 2019).…”

“…Huang et al used the AC-supported Fe(II) and nanoscale Fe(0) as PRB materials to treat artificially Se(IV)-spiked soil. The Se(IV) removal rate was 69 ~ 93% under different process conditions (Huang et al, 2019). as a PRB material for treating clay contaminated with a low concentration of Cr(VI).…”

Hazardous wastes treatment technologies

“…The result showed that ANNUAL LITERATURE REVIEW in the presence of 50 mM of sodium citrate, the As(V) and Cr(VI) removal was 50.5% and 44.1%, respectively, whereas, the As and Cr(VI) removal was 26.3% and 54.28% in the presence of 10 mM of Na 2 EDTA was used. Huang, Liu, Zhang, Liu, Zhang, and Xu (2019) investigated the removal of selenite ions from soils using EK/PRB system filled with activated carbon (AC) supported Fe(II) and nanoscale zero-valent iron (nZVI). Increase in number of thin PRB increased Se(IV) removal and catalytic recovery; under the optimal operation condition, the removal and reduction of Se(VI) were 95% and 90%, respectively.…”

“…Huang, Liu, Zhang, Liu, Zhang, and Xu (2019) investigated the removal of selenite ions from soils using EK/PRB system filled with activated carbon (AC) supported Fe(II) and nanoscale zero‐valent iron (nZVI). Increase in number of thin PRB increased Se(IV) removal and catalytic recovery; under the optimal operation condition, the removal and reduction of Se(VI) were 95% and 90%, respectively.…”