TÁCH LOẠI CÁC PHẨM NHUỘM CATION XANH METYLEN VÀ TÍM TINH THỂ TRONG NƯỚC SỬ DỤNG ĐÁ ONG BIẾN TÍNH BẰNG CHẤT HOẠT ĐỘNG BỀ MẶT ANION

Tóm tắt

This paper focus on removal of cationic dyes methylene blue (MB) and crystal violet (CV) from
aqueous solution by using anionic surfactant modified laterite soil. The BET surface area and the point
of zero charge of the material were determined as 54.02 m2/g and 5.73, respectively. The FT-IR
spectras of the material after sequential adsorption of MB and CV were studied. The concentration of
MB and CV was measured by molecular absorption spectrometry method. Some optimum conditions for
measuring MB and CV by the method were systematically studied and found as wave length 663 nm,
pH 2 for MB; 590 nm, pH 3 for CV. The results indicated that some ions such as Fe3+; Al3+; Ca2+;
Zn2+... reduced MB and CV adsorption capacity of the material. The removal efficiency of MB and CV
using SDS modified laterite soil is always higher than that using laterite soil. Fixed – bed column
adsorption capacity for MB and CV is 11.26 mg/g và 13.66 mg/g (at flow speed of 2.0 mL/min and MB
concentration is 14.09 mg/L; CV concentration is 16.05 mg/L), respectively. The solution of 0.01 M
HCl was used for elution MB and CV with effective elution is greater than 95%. The MB content of a
waste water sample is removed.