不同炭化温度下烧制的竹炭对邻氯酚的吸附  

ADSORPTION OF o-CHLOROPHENOL ON BAMBOO CHARCOAL CARBONIZED AT DIFFERENT TEMPERATURES

作　　者：褚淑祎[1] 周小琴[1] 张妙仙[1] 单胜道[1] 

机构地区：[1]浙江林学院环境科技学院,临安311300

出　　处：《环境化学》2010年第2期281-284,共4页Environmental Chemistry

基　　金：国家"863"计划项目(2006AA06Z344);浙江省科技厅重大专项资助项目(2006C13036)

摘　　要：研究了pH、吸附时间、竹炭投加量、邻氯酚初始浓度和吸附温度对不同炭化温度(500℃、700℃和900℃)下烧制的竹炭对邻氯酚的吸附特性的影响.结果表明,低pH值有利于3种竹炭对邻氯酚的吸附,其平衡吸附量均随初始浓度和吸附温度增大而增加,相同条件下,吸附量的大小依次为q900℃>q500℃>q700℃;500℃和700℃炭化温度下烧制的竹炭对邻氯酚的吸附表现出相似的变化规律,吸附时间为13h时基本达到平衡,而900℃炭化温度下烧制的竹炭的吸附则是一个快速吸附过程,30min内即达到吸附平衡;3种竹炭对邻氯酚的吸附皆是一个吸热过程,实验进行的吸附温度下,其吸附量的大小依次为q40℃>q25℃>q15℃.Adsorption properties of o-chlorophenol onto bamboo charcoal carbonized at 500℃, 700℃ and 900℃ were investigated. The effect of various parameters such as pH value, adsorption time, adsorbent dosage, initial concentration of o-chlorophenol and adsorption temperature was studied. The results indicated that the bamboo charcoal at all carbonizing temperatures were more effective in adsorbing o-chlorophenol under low pH values, and the equilibrium adsorption capacity increased with increasing initial concentration of o-chlorophe- nol and adsorption temperature. Under the same conditions, the order of adsorption capacity of the bamboo charcoal was q900℃ 〉 q500℃ 〉 q700℃. The bamboo charcoal carbonized at 500℃ and 700 ℃ had similar adsorption characteristics, and approached equilibrium after about 13h. The adsorption process of o-chlorophenol onto bamboo charcoal carbonized at 900℃ was a rapid reaction, and reached equilibrium after 30min. The adsorption reaction of o-cblorophenol onto all the bamboo charcoals were endothermic, and the order of adsorption capacity was q40℃ 〉 q25℃ 〉 q15℃.

关 键 词：竹炭 炭化温度 吸附量 2-氯酚. 

分 类 号：X52[环境科学与工程—环境工程]