摘要
利用入侵植物加拿大一枝黄花为原料,采用在400℃氮气保护下,直接碳化90 min后,选择KOH为活化剂,微波活化的方法制备活性炭。研究了不同的KOH/C比值、微波功率及活化时间对活性炭吸附量及产率的影响。结果表明,最优活化条件为碱碳比2 g/g、微波功率700 W及微波辐射6 min,此时活性炭的亚甲基蓝吸附值、碘吸附值、活化产率和表面积分别为302.4 mg/g、1 470.27 mg/g、53.75%和1 888 m2/g。采用热重分析研究加拿大一枝黄花的碳化过程,分别使用氮气吸附-脱附、扫描电镜(SEM)和傅立叶红外光谱法(FT-IR)表征了活性炭的孔结构特征、表面结构及表面官能团。
The activated carbons（ACs） was prepared from Solidago canadensis,an alien invasive plant.The plant was firstly carbonized under nitrogen at 400 ℃ for 90 min,then the carbonized product was activated with KOH through microwave radiation.Effects of KOH/C ratio,microwave power and microwave radiation time on the adsorption capacities and yield of AC were evaluated.It indicated that the optimum conditions were the KOH/C ratio of 2 g/g,microwave power of 700 W and microwave radiation time of 6 min.The adsorption amount of methylene blue and iodine,the activation yield and the surface area of AC prepared from optimum conditions were 302.4 mg/g,1 470.27 mg/g,53.75% and 1 888 m2/g,respectively.The carbonation process of Solidago canadensis was analyzed by TG and DTG.The pore structural parameters,surface structure and surface functional groups of the AC were characterized by nitrogen adsorption-desorption,SEM,FT-IR,respectively.
出处
《环境工程学报》
CAS
CSCD
北大核心
2011年第5期1161-1165,共5页
Chinese Journal of Environmental Engineering
基金
上海市重点学科建设项目资助(B604)
上海市基础研究重点项目(09JC1400600)
关键词
加拿大一枝黄花
活性炭
微波辐射
氢氧化钾
Solidago canadensis
activated carbon
microwave radiation
KOH activating agent
