NGHIÊN CỨU KHẢ NĂNG HẤP PHỤ Cr(III), Cr(VI), METHYLENE BLUE CỦA VẬT LIỆU VỎ BƯỞI ĐÃ QUA XỬ LÝ VÀ ỨNG DỤNG TRONG XỬ LÝ NƯỚC THẢI
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ABSTRACT
The use of adsorbent materials to remove heavy metals, color in industrial
wastewater treatment is applied a lot. In this study, we used pomelo peel as an
agricultural waste for adsorption. First, we analyzed the properties of adsorption
materials by X-ray diffraction (EDX), electron transfer spectroscopy (SEM), (FT-
IR). We then investigated the optimal adsorption of grapefruit crust material for
Cr(III), Cr(VI), Methylene blue under different conditions.
The results showed that adsorption of Cr(III) grape peel adsorbent was the best at
pH=5, adsorption time was 120 minutes, at 30 0 C, adsorption efficiency was
57,44%.
When investigating the adsorption capacity of grapefruit crust material for Cr(VI),
the results showed that grapefruit peel adsorption did not adsorbed Cr(VI).
Therefore, to absorb Cr(VI) we conduct reduction of Cr(VI) to Cr(III) to increase
the absorption efficiency of Cr(VI).
Research results also show that when using pomelo peel as methylene blue
adsorbent, the efficiency of the reaction is highest. Under pH = 10, the adsorption
time was 150 minutes, at 30 0 C the methylene blue adsorption efficiency of the
pomelo peel was 86,78%.
The research has initially confirmed that the adsorption material from pomelo peel,
a popular agricultural waste in Vietnam, has great potential for wastewater
treatment.
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