METHYLENE BLUE ADSORPTION ABILITY OF BIOLOGICAL MATERIALS PRODUCED FROM MACADAMIA NUTSHELL

Abstract

Research on wastewater treatment of Methylene Blue (MB) by biological materials produced from macadamia nutshell by processes of carbonization, activation and modification. The study results showed that the MB adsorption ability of activated carbon with K₂CO₃ reached 1g/261.52mg MB under optimal conditions such as the ratio of K₂CO₃: biochar = 1:1, the temperature was 650⁰C and heating time for 60 minutes; modified carbon with HNO₃ reached 193.13mg/g at a concentration of 21% and the denaturation time was 12 hours. Biochar's MB color processing ability is only 64.62% at pH = 10 and the dosage is 1g/L in 120 minutes; Besides, activated carbon from Macadamia nutshell with K₂CO₃ achieved the best MB color treatment efficiency of 98.55% under optimal conditions such as pH = 9.5, the dose of 0.8g/L and the processing time is 45 minutes; modified carbon by HNO₃ from activated carbon achieved the best MB color treatment efficiency of 79.36% at pH = 9.5, the dose is 1g/L in 120 minutes, corresponding to the color of 406 Pt-Co.