TỐI ƯU HÓA QUÁ TRÌNH HẤP PHỤ Cr(VI) TRONG NƯỚC TRÊN VẬT LIỆU NANOCOMPOSITE Fe3O4/OXIT PHỨC HỢP Fe-Mn /BENTONITE SỬ DỤNG THIẾT KẾ THÍ NGHIỆM TAGUCHI VÀ PHƯƠNG PHÁP BỀ MẶT ĐÁP ỨNG

Tóm tắt

In this report, Taguchi experimental design (TED) and response surface methodology (RSM) were used to
optimize and model Cr(VI) removal conditions by Fe3O4/Fe-Mn binary oxide/bentonite nanocomposite
(FFMB). The effect of variables including Cr(VI) concentration, adsorbent dosage, pH of the solution, and
contact time on the adsorption efficiency of Cr(VI) were evaluated by TED. Then, the most important factors
were chosen and modeled by RSM to reach the highest efficiency of Cr(VI) removal. The proposed quadratic
equation of RSM was consistent with correlation coefficients R
2=0,9874 for the actual experimental data.
The maximum adsorption capacity of Cr(VI) in the optimal operation condition (solution pH of 2.54, contact
time of 314 min and adsorbent dosage of 1,55 g/l) was 64,15 mg/g.