典型种类活性炭吸附二恶英影响因素实验研究  

Adsorption behavior of dioxin on specific activated carbons

作　　者：马显华[1] 李晓东[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《能源工程》2013年第3期50-54,共5页Energy Engineering

基　　金：国家973计划项目(2011CB201503);国家863计划项目(2012AA062803);固体废物处置设施环境安全评价技术研究项目(201209022)

摘　　要：采用稳定的二恶英发生源系统,对4种典型的商用活性炭进行了二恶英的吸附实验。研究了活性炭的比表面积、孔径分布、碘值、亚甲基蓝值等物化特性对二恶英吸附的影响。结果表明,活性炭的比表面积、碘值、亚甲基蓝值并不能直接反映活性炭对二恶英的吸附能力;活性炭在吸附气相二恶英时并无明显的选择性,选择性吸附与活性炭的吸附方式有关;作为吸附二恶英的活性炭需具备丰富的2～20 nm段的孔径分布,同时需要适量的大孔分布。The dioxin adsorption behavior on four specific kinds of activated carbon was evaluated via dioxin adsorption experiments.The physicochemical properties of AC including BET-surface,pore-size distribution,iodine value,methylene blue value were considered as the influence factors.The results showed that the BET-surface,iodine value,methylene blue value all can＇t directly reflect the adsorption capacity for dioxin.And there was hardly any adsorptive selectivity for the 17 toxic dioxin homologs.It was thought that the adsorptive selectivity related to the patterns of AC adsorption.This study also confirmed again that the surface area of mesopore（20~200A °） and some existing macropore were the critical factors affecting PCDD/F adsorption capacity.

关 键 词：二恶英 活性炭 物化特性 吸附规律 

分 类 号：X705[环境科学与工程—环境工程]