Isotherms and Kinetics Studies on the Removal of Methylene Blue from Aqueous Solution by Gambir

Abstract

Gambir Indonesia was chemically modified into an adsorbent for the removal of methylene blue from aqueous solution. The surface morphology and functional groups of the adsorbent are characterized by using Scanning Electron Microscopy, Fourier Transform Infrared Spectrophotometry and surface area analysis. The solution pH of methylene blue and adsorbent dosage were optimized at pH 6.0 and 0.05 g, respectively. The isotherms studies showed that the adsorption experimental data was fitted well by Langmuir isotherm model. The adsorption capacity was found to be 149.3 mg/g. The pseudo-second-order equation has described well on the adsorption process of methylene blue onto gambir adsorbent.

Retention of Organic Matter Contained in Industrial Phosphoric Acid Solution by Raw Tunisian Clays: Kinetic Equilibrium Study

“…Both and could be determined from the slope and intercept of the linear plot / against , respectively. is the equilibrium concentration of OM (milligrams per litre), is the adsorbed amount of OM (milligrams per gram), (milligrams per gram) is the maximum adsorption capacity, and is the Langmuir constant related to the adsorption energy [23].…”

Application of Wheat Husk in Color Removal of Textile Wastewater

“…Much research has been done on developing more efficient, cheap, regenerated and easily accessible types of adsorbents, particularly from the waste materials, for the removal of dyes from wastewater. A number of low cost and waste materials have been used to remove dye from wastewater, such as; orange peels [6], banana peels [7], gambir [8], rice husk [9], groundnut shell [10] peanut hull [11] and Tamarind seed husk [12]. The aim of the present work is to study the ability to use Iraqi wheat husk (IWH) as the low-cost natural adsorbent to remove dye from wastewater.…”