The effectiveness of ferrous iron and sodium dithionite for decreasing resin-extractable Cr(VI) in Cr(VI)-spiked alkaline soils

The preparation of novel adsorbent materials with efficient adsorption performance for both chromium and methylene blue

“…Graphene oxide was prepared from purified natural graphite by the modified Hummers method [22]. Magnetic chitosan and graphene oxide was prepared following the method of Fan L. et al [23].…”

Preparation of Amidoxime Adsorbent by Radiation Induced Grafting of Acrylonitrile on Polyethylene Film and Its Application in Cr(VI) Removal

“…[11][12][13][14] Adsorption has been most widely used due to relatively low-cost, availability, ease of operation and efficiency in comparison with other conventional methods. 15 For this purpose, many types of adsorbents have been investigated for the removal of chromium including activated carbon, biomaterials and nanomaterials.…”

Reduction and immobilization of chromium(VI) by iron(II)-treated faujasite

“…Chromium exists in both the Cr(III) and Cr(VI) oxidation states in the environment. The Cr(III) species is not highly mobile in soil due to precipitation of insoluble Cr(OH) 3 and CrOOH solid phases and adsorption on soil mineral surfaces [7][8][9]. In contrast, the Cr(VI) species is a soluble anion (Cr 2 O 7 2− or CrO 4 2− ) with relatively poor affinity for mineral surfaces [3,10,11].…”