Removal of Total Dissolved Solids from Contaminated Water Using Conocarpus Adsorbent

Abstract

High TDS and TSS in water is usually important causes of clogging emitters. Irrigation with high EC and TDS has an adverse effect on drip irrigation. In this study, the effect of Conocarpus on removal of dissolved solids from aqueous solution was investigated. Batch tests were conducted to verify the removal of dissolved solids from the aqueous solution and the efficiency of the sorbent was determined. Various parameters such as pH, contact time and initial concentration of adsorbent was tested on the absorption of dissolved solids. The optimum pH for both absorbents were 3 and for absorbent straw the equilibrium time of 10 minutes was obtained. Adsorption efficiency for 0.1 g of adsorbent was recorded as %93.55, respectively. With increasing the concentration of dissolved solids (83-960 mg/l), the efficiency of adsorption for straw was decreased from 88.9 percent to 42.5 percent. Between the isotherms which were studied, the adsorption process followed the Langmuir isotherm model. Among the kinetic models Lagergren kinetics model had a better match to the experimental data.

Keywords

• adsorption
• isotherm model
• kinetic model
• tds removal