【摘要】 以纤维素为原料酯化制备纤维素酯,用制备的纤维素酯吸附电镀废水中的重金属离子。探究纤维素酯对重金属离子的吸附性能。在投料量0.12 g、吸附时间50 min、温度30℃、pH=3时Cu²⁺吸附率为94.74%;在投料量0.10 g、吸附时间2.5 h、温度25℃、pH=2³时Cr（Ⅵ）的吸附率为90.54%;在投料量0.10 g、吸附时间40 min、温度25℃、pH=4时Ni²⁺吸附率为91.25%。模拟电镀废水的最佳吸附条件为:投料量0.12 g、吸附时间1 h、温度25℃、pH=3。在此条件下纤维素酯对电镀废水中重金属离子的吸附率为90.64%。吸附后的纤维素酯经洗脱,其再生率为73.05%。更多还原

【Abstract】 Cellulose acetate prepared by esterfying cellulose was used to absorb heavy metal ions including Cu²⁺,Cr（ VI） and Ni²⁺in electroplating wastewater. The results showed that the adsorption rate for Cu²⁺was 94.74% with 0. 12 g inventory,50 min adsorption time,30 ℃ temperature and 3 pH value. The adsorption rate for Cr（ Ⅵ） was 90. 54% with 0. 10 g inventory,2. 5 h adsorption time,25 ℃ temperature and 2-3 pH value. The adsorption rate for Ni²⁺was 91. 25 % with 0. 10 g inventory,40 min adsorption time,25 ℃ temperature and 3 pH value. Based on these data,the adsorption experiment for simulated electroplating wastewater was conducted and the best adsorption rate 90. 64% for heavy ions was obtained with 0. 12 g inventory,1 h adsorption time,25 ℃temperature and 3 pH value. The cellulose acetate after the adsorption was eluted and the regeneration rate was 73.05%.更多还原