Abstract
This research has been carried out to produce adsorbent from Lapindo mud through various activation process, to adsorb nickel from nickel sulfate solution. Several investigations were performed in this research such as characterization of Lapindo mud before and after activation, effect of physical, chemical and chemico-physical activation to Si/Al ratio and determine the most effective method to produce adsorbent with high adsorption rate. Lapindo mud in this research was prepared through several methods such as without activation, calcination at 500 C for 3 hours, chemical activation with 6 N HCl under reflux for 6 hours, chemical activation with 6 N NaOH under reflux for 6 hours, chemical activation with 6 N HCl under reflux followed by calcination process and the last treatment is chemical activation with 6 N NaOH under reflux followed by calcination process. The object of this research is the Lapindo mud adsorbent ability to adsorb Ni from NiSO4 solution. While activation methods and nickel concentration in this become independent variable. The reduction of nickel concentration efficiency is determined by the nickel concentration before and after adsorption process. The Si/Al ratio of Lapindo mud before activation process was 3.01 and it increase as the mud is activated. The highest Si/Al ratio was found at activation using HCl which is 7.85. Chemical activation using NaOH was found to be the best method to create the adsorbent with adsorption capacity 98.3%.
Highlights
On 29th of May 2006, first mud eruption is witnessed in Sidoarjo, Jawa Timur, Indonesa
Lapindo mud in Sidoarjo is composed of 70% water and 30% solid, which might be contain contaminant that is harmful if released at high amount to the environment
This research focuses on the influence of activation method to the adsorbent characteristic and adsorption capability of Lapindo mud adsorbent
Summary
On 29th of May 2006, first mud eruption is witnessed in Sidoarjo, Jawa Timur, Indonesa. In order to improve Lapindo mud adsorption capability, the adsorbent need to be activated. Udyani & Wulandari (2014) stated that zeolite adsorption ability is in line with the increasing calcination temperature during activation process. Optimum calcination temperature for activation process should be take place at 500 °C as activation process performed by Gustian & Suharto (2005). Based on this problems, in the present study the most effective activation method resulting adsorbent with high adsorption capability is investigated. This research focuses on the influence of activation method to the adsorbent characteristic and adsorption capability of Lapindo mud adsorbent. Activation methods investigated in this research were physical, chemical and chemicophysical activation
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