Nanofiltration process applied to the tannery solutions

Application of Brazilian-pine fruit coat as a biosorbent to removal of Cr(VI) from aqueous solution—Kinetics and equilibrium study

“…The interaction of the adsorbate with the adsorbent is strongly affected by the solution acidity (pH). Generally, the adsorption of anions, such as Cr(VI) which is present in the form of CrO 4 2− or HCrO 4 − at pH ≥ 4.0 or dichromate at pH ≤ 3.0 [31] is usually favored at acidic solutions [18]. As can be seen, the best pH for Cr(VI) uptake using PW as biosorbent was within pH 1.5-2.0, as early observed in previous works [9,18] (see Fig.…”

“…The usual methods to remove Cr(VI) from aqueous effluents include chemical reduction [3], nanofiltration [4], bioaccumulation [5], ion exchange [6], adsorption on silica composites [7,8], and on activated carbon [9]. However, these approaches are not cost-effective or difficult to implement in developing countries.…”

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.…”

Electrodialysis Treatment of Tannery Wastewater

“…Due to the limitations of conventional wastewater treatment in tannery, other processes have been pursued in the last years [2,10,11,19,24]. Amongst these, membrane separation processes such as electrodialysis have emerged as an alternative.…”