UITILITY OF ZEOLITE FOR WASTE Ni, Cr, Zn-ELECTROPLATING TREATMENT IN ACID CONDITION

• Main Author: GUNAWAN (NIM : 12506003), BUDI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21464
• Institution: Institut Teknologi Bandung

Zeolite is an aluminasilicate mineral compound that hidrated from alkali cation with porous frame of structures. Based on physical and chemical characterization, zeolit has potential to be used as adsorbent, catalyst, molecular sieving and ion exchanger It’s possible for zeolit to be removal of industrial waste that contains hazardous and toxic material like in electroplating industry. Electroplating wastes contains heavy metal such as zinc, chrome, nickel, etc that are very hazardous if their concentration surpassed the allowable criteria. Electroplating wastes treatment is very important to reduce the concentration of those heavy metals. In this research, method of electroplating waste treatment using natural and activated zeolite as adsorbent, would been studied. <br /> <br /> <br /> <br /> A series of adsorption experiment of metal ions adsorption from Zn, Cr and Ni-electroplating waste solution was conducted to study the influence of pH, feed solution flow rate, height of fixed bed zeolite and size fraction of zeolite on the Zn, Cr and Ni adsorption percentage. Moreover the effect of activation method, whether acid activation or heating activation, onto the change of adsorption capability from zeolite would also been studied. The adsorption method used in this research is column adsorption which the solution was passed through the fixed bed of zeolite in column by using a peristaltic pump. Zn, Cr and Ni-concentrations in the adsorbate solution passed through the column were measured by Atomic Absorption Spectrophotometry (AAS) analysis for determining the amount of Zn, Cr and Ni that adsorbed by zeolite. <br /> <br /> <br /> <br /> The results of zinc adsorption experiments showed that the highest Zn adsorption percentage of 75.65% was obtained at pH 7, solution flow rate of respectively 10 BV/h, height of fixed bed zeolite respectively 6.875 cm, the -20 +48 mesh zeolite (in size) and the activation method of zeolite was heating activation. From the Cr electroplating waste adsorption experiments, Cr adsorption percentage of 58.41% was obtained at pH 7, solution flow rate of respectively 10 BV/h, height of fixed bed zeolite respectively 6.875 cm, the -20 +48 mesh zeolite (in size) and the activation method of zeolite was acid activation. From the Ni electroplating waste adsorption experiments, Ni adsorption percentage of 69.83% was obtained at pH 5, solution flow rate of respectively 10 BV/h, height of fixed bed zeolite respectively 6.875 cm the -20 +48 mesh zeolite (in size) and the activation method of zeolite was heating activation. From this research we could make a good electroplating waste treatment in order to produce a safety electroplating waste.