摘要
运用反相气相色谱法研究了 2 0种VOCs在CPC 膨润土上的吸附平衡及吸附热 .结果表明 ,CPC 膨润土对VOCs的吸附有较强选择性 ,吸附能力与有机物的分子量、分子结构、饱和蒸气压等物理化学性质有关 ,对苯系物和分子量较大的酯类和酮类等吸附能力较强 .温度较低时 ,CPC 膨润土对VOCs的吸附能力较强 ,吸附热较大 ;吸附热与VOCs的沸点蒸发热相当 。
Sorption properties and enthalpies of 20 VOCs onto CPC organobentonite were studied by inverse gas chromatography. CPC bentonite showed strong selectivity toward VOCs, and its sorption capacity depended on physicochemical properties of VOCs, such as molecular weight, structure, and saturated vapor pressure. The sorption abilities of BTEX, esters and ketones with greater molecular weights to CPC bentonite were greater than the others. The sorption properties were obviously influenced by temperature. The sorption enthalpies of VOCs onto CPC bentonite were similar fo heating of evaporation, but smaller than that of common adsorbents.
出处
《环境科学学报》
CAS
CSCD
北大核心
2003年第4期488-493,共6页
Acta Scientiae Circumstantiae
基金
国家自然科学基金项目 ( 2 97770 0 5 )
国家高技术研究发展计划 ( 86 3)资助项目( 2 0 0 2AA30 2 30 5 )
