SOME CHARACTERISTICS OF THE ADSORPTION MATERIALS MANUFACTURED FROM NATURAL BASALT AND LATERITE

Abstract

For the purpose of manufacturing adsorptive material particles (BVNQ, OBYQ and BOS) from natural sources such as basalt, laterite to adsorp heavy metals and arsenic in water was studied. The composition of mineral particles was analyzed by XRD method, the structure of the minerals studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), the distribution of atoms in the material are determined by EDS-FeSEM. Results show that adsorptive material particles containing Fe, Al are the arsenic adsorption center.

The optimal conditions for arsenic adsorption: pH = 6 for As (III) and pH = 5 for As (V),adsorption time is 28 hours for As (III) and 24 hours for As (V), the ratio between the material particals: treatment water is 40 g/l, particularly for BVNQ materials for adsorption As (V) is 20 g/l, maximum arsenite adsorp capacity is from 1200 to 1330 mg As(III)/kg, maximum arsenate adsorp capacity of BVNQ is 4090 mg/kg, OBYQ is 2270mg/kg and BOS is 1750mg/kg.

Adsorption ability of As(V) is higher As(III) and BVNQ material adsorp arsenic is the best. Research results of arsenic adsorption capability for 3 material in accordance with the results of measuring surface area, pore volume and TEM, SEM. With physical chemistry properties of adsorption materials above, it can be used for waste water treatment.