Treatment of Wastewater From Chrome Plating Industry by Ion Exchange Method

Abstract

In the present work an attempt has been made to evaluate the efficiency of removal Cr(VI) from chrome plating industry wastewater by using fresh and reconditioned strong base anion exchanger Tulsion A-27(MP). The Experimental data is evaluated by plotting breakthrough curves and by employing Bohart-Adams Model. The maximum removal (80%) of Cr(VI) from plating wastewater is obtained at 14cm column bed height and flowrate 1mL/min for 1144.39mg/L of influent Cr(VI) concentration. The breakthrough curves for reconditioned and fresh resins indicates that breakthrough occurs early with decrease in bed height, increase in flow rate and influent Cr(VI) concentration. Regeneration of exhausted resin is also studied by using 2M NaCl and 2M HCl.

Overexpression of the sulfate transporter‐encoding SULTR2 increases chromium accumulation in Chlamydomonas reinhardtii

“…Hexavalent chromium (Cr(Ⅵ)) is a well‐known pollutant that originates from effluents of several industrial processes such as tanning, electroplating, dyeing, and wood preservation (WHO, 2013). In industrial wastewaters, high chromium concentrations were found in tannery effluents (0.7–345 mg/L) (Dhungana & Yadav, 2009), textile mill effluents (0.11–0.21 mg/L) (Bhardwaj et al, 2014), and chrome plating industry wastewater (5722 mg/L) (Karegar et al, 2015). For natural waters, lower chromium concentrations have been described; for example, 0.1–117 μg/L in freshwater and 0.2–50 μg/L in seawater (Shanker & Venkateswarlu, 2011).…”