Adsorption properties of As, Pb AND Cd in soft soil and meta sedimentary residual soil.

Abd Karim, Ahmad Tarmizi and Abdul Latiff, Ab Aziz (2008) Adsorption properties of As, Pb AND Cd in soft soil and meta sedimentary residual soil. In: Engineering Postgraduate Conference , Bangi, Selangor.

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Abstract

Arsenic, Lead and Cadmium were commonly found at industrial sites and turn out to be toxic at high concentrations. Two types of soil commonly found in Malaysia, namely meta sedimentary residual soil (RS) and soft soil (SS) were studied as an adsorbent for the removal of As, Pb and Cd. The physico-chemical properties and batch adsorption tests were conducted in order to evaluate the capability of these soils. The physico-chemical properties tested in this study include particle size distribution, Atterberg limit, pH of soils, surface area and pore size determination, soil mineralogy, soil composition and cation exchange capacity. Batch adsorption tests were performed by shaking 6g of soil in 30ml of solution. The concentration were fixed at 10mg/L while the contact time varies at 0.5, 1, 2, 4, 8, 12, 16, 20, 24, 48, 72, 96, 120, and 168 hours. The filtrates were then tested using Atomic Absorption Spectrometer (AAS) and the adsorption data have been correlated with both Freundlich and Langmuir isotherms. The results showed that the RS successfully adsorbed Pb and Cd while soft soil was effective in the removal of As. Both soils fitted well to Freundlich adsorption isotherm in the adsorption of As and Cd while Langmuir was best fitted in the removal of Pb.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:meta sedimentary residual soil, soft soil, adsorption, physico-chemical characteristics; Freundlich and Langmuir isotherm
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA703-711 Engineering geology. Rock mechanics. Soil mechanics.
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environment Engineering
ID Code:2288
Deposited By:Mrs Hasliza Hamdan
Deposited On:23 Apr 2012 09:10
Last Modified:23 Apr 2012 09:10

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