桐壳基活性炭的制备及其对有机物的吸附性能  

Preparation of Tung-nut-shell Based Activated Carbon and Its Adsorption Capacity for Organic Contaminants

作　　者：林云珠[1] 钱庆荣[1] 黄宝铨[1] 龚兵丽[1] 陈庆华[1] 

机构地区：[1]福建师范大学化学与材料学院福建省改性塑料技术开发基地,福建福州350007

出　　处：《林产化学与工业》2007年第4期55-60,共6页Chemistry and Industry of Forest Products

基　　金：福建省自然科学基金资助项目(D0510016);教育部"新世纪优秀人才支持计划"项目(NCET-04-0614)

摘　　要：以桐壳为原料,在通氮速率为200 mL/min、活化温度400℃、升温速率10℃/min和活化时间1 h的条件下,采用氯化锌活化法制备了桐壳基活性炭,并采用SA3100型表面积和细孔分析仪及扫描电镜等分析方法,对所制备的桐壳基活性炭的表面细孔结构进行了表征;同时,还进行了亚甲基蓝和苯酚溶液的吸附实验。结果表明,所制备的桐壳基活性炭的比表面积和细孔总体积可分别高达1 995 m2/g和1.521 mL/g,其对亚甲基蓝和苯酚吸附能力随氯化锌用量的增加而增加,其中CT3.0对苯酚吸附能力高于普通商品活性炭,可望成为一种高效的有机污染物吸附材料。Activated carbon was prepared from tung-nut-shell by activation with zinc chloride at pyrolysis temperature of 400 ℃ for 1 h under nitrogen flow of 200 mL/min. The N2 adsorption-desorption isotherms of the prepared activated carbons were measured on a Beckman counter SA3100 surface area and pore size analysers, and the morphological structures of the activated carbons were observed by SEM. The prepared activated carbons were also employed as adsorbents for the experiment of adsorbing methylene blue and phenol in aqueous solutions. The results showed that the resultant activated carbons could be obtained from the tung-nut-shell with high BET surface area of 1 995 m^2/g and high total pore volume of 1. 521 mL/g, respectively. Increasing the mass ratio of ZnCl2 to tung-nut-shell resulted in the increment of the capacities for phenol and methylene blue adsorption. Compared to commercial activated carbon of F 400, the prepared activated carbon CT 3.0 exhibits higher capability for phenol and methylene blue adsorption. Therefore, it is expected to be a low-cost and efficient adsorption material for effluent treatment.

关 键 词：桐壳 活性炭 吸附性能 

分 类 号：TQ424[化学工程]