【摘要】：文章采用氯化鋅水溶液對(duì)廢棄的蘭炭末進(jìn)行改性,研究了改性蘭炭末對(duì)水溶液中甲基橙(MO)吸附性能的影響,并探討其吸附機(jī)理。結(jié)果表明:改性蘭炭末對(duì)MO的吸附量隨著溫度升高而降低,吸附為放熱過(guò)程,在298K時(shí)達(dá)372.1mg/g;吸附等溫線(xiàn)呈S型,不是一個(gè)簡(jiǎn)單的單分子層吸附,低質(zhì)量濃度的MO溶液在改性蘭炭末上的吸附符合Freundlich模型,高質(zhì)量濃度時(shí)則符合BET多分子層吸附;準(zhǔn)二級(jí)動(dòng)力學(xué)方程可較好地描述其吸附動(dòng)力學(xué)過(guò)程,顆粒內(nèi)擴(kuò)散是吸附速率控制步驟,表觀活化能Ea為19.21kJ/mol。
[Abstract]:In this paper, the waste blue carbon was modified by zinc chloride aqueous solution. The effect of modified blue carbon on the adsorption properties of methyl orange (MO) in aqueous solution was studied, and the adsorption mechanism was discussed. The results showed that the adsorption capacity of MO decreased with the increase of temperature, and the adsorption was exothermic, which reached 372.1 mg / g at 298K. The adsorption isotherm is S-shaped, which is not a simple monolayer adsorption. The adsorption of low concentration MO solution on modified blue carbon accords with Freundlich model, but at high concentration it accords with BET multimolecular layer adsorption. The quasi-second-order kinetic equation can well describe the adsorption kinetics. The intra-particle diffusion is the control step of adsorption rate, and the apparent activation energy Ea is 19.21kJ 鈮，

本文編號(hào)：2493237