Removal of Copper Ions from Acid Mine Drainage Wastewater Using Ion Exchange Technique: Factorial Design Analysis

Abstract

A factorial experimental design method was used to examine the "Cu 2+ " removal from acid mine drainage wastewater by ion exchange technique. Ion Exchange technique is preferred because of reduced sludge generation compared to conventional treatment techniques and better decontamination efficiency from highly diluted solutions. Factorial design of experiments is employed to study the effect of four factors pH (3, 5, and 6), flow rate (5, 10, 15 L/hr), resin bed height (20, 40 and 60 cm) and initial concentration of the metal (100, 150 and 200 mgl -1 ) at three levels. The efficiency of metal removal was determined after 100 min of treatment. Main effects and interaction effects of the four factors were analyzed using statistical techniques. A regression model was recommended and it was found to fit the experimental data very well. The results were analyzed statistically using the Student's t-test, analysis of variance, F-test and lack of fit to define most important process variables affecting the percentage "Cu 2+ " removal. In this study, pH was thus found to be the most important variable.

Adsorption of Cu(II), Ni(II) and Zn(II) ions by nano kaolinite: Thermodynamics and kinetics studies

“…A comparison with other adsorbents indicated a high metal ion adsorption capacity of nano kaolinite extracted and prepared from deposits of Sweileh sand, west Amman, Jordan. Findings revealed that nano kaolinite offered promising adsorption efficiency versus various other adsorbents reported for metal ions adsorption and nano kaolinite could possibly be used for the adsorption of heavy metal ions from industrial effluents (Bulgariu et al, 2019;Chen et al, 2019;Gaikwad et al, 2010;Godiya et al, 2019a;Godiya et al, 2019b;Ibrahim and Fakhre, 2019;Jiang et al, 2019;Kausar et al, 2018a;Kausar et al, 2018b;Khera et al, 2019;Liang et al, 2013;Mousavi et al, 2019;Nadeem et al, 2016;Sandoval et al, 2019;Zafar et al, 2018;Zhao et al, 2019).…”

Activated carbon from molasses efficiency for Cr(VI), Pb(II) and Cu(II) adsorption: A mechanistic study

“…Conventional methods for removing metals from industrial effluents include chemical precipitation, coagulation, solvent extraction, electrolysis, membrane separation (Gürel et al 2005), ion -exchange (Roque-Malherbe et al 2007;Barbooti, 2010;Gaikwad et al, 2010) and adsorption on different materials (El Harti et al, 2013ab;Al-Jlil, 2009).…”

Copper removal from acid mine drainage-polluted water using glutaraldehyde-polyethyleneimine modified diatomaceous earth particles

“…To date, a wide range of AMD treatment systems have been developed based on chemical, physical and biological processes, alone or in combination, with systems generally categorised as either “passive” or “active” depending on the process [ 2 , 4 , 16 , 17 ]. Examples of processes are: pH control or precipitation, adsorption or absorption, electrochemical concentration, flocculation/filtration/settling, biological mediation, redox control (sulphate reduction), ion exchange and crystallisation [ 2 , 17 , 18 , 19 ]. The main difference between these treatment systems is their ability in handling the acidity, flow rate and acidity load (i.e., the product of acidity and flow rate) of the influent AMD [2] .…”