Efficient elimination of Cr(vi) in groundwater using nano zero-valent iron synthesized with Ginkgo biloba extracts: enhanced mechanism and reduced toxicity

Abstract

Various industrial activities have led to increasingly serious hexavalent chromium (Cr(vi)) contamination in the aquatic environment.

Preparation of an amino-modified biochar supported sulfide nanoscale zero-valent iron composite and its efficient removal of U(vi) from wastewater by adsorption and reduction

“…Amino-modified biochar was used as a support material to prevent agglomeration of nZVI, thereby enabling simultaneous achievement of strong adsorption and reduction effects. [25][26][27][28] Furthermore, surface passivation treatment can decrease the rate of nZVI's interaction with oxygen and water, thereby extending its reaction lifetime. 29,30 Sulfide-modified nZVI (SnZVI) is believed to enhance the efficiency of treating uranium-containing wastewater, and amino functional groups can improve the adsorption performance of carbon materials on water pollutants.…”