活性炭粒径对吸附不同分子质量有机污染物的影响

Effect of particle size of activated carbon on the adsorption for organic pollutants with different molecular weights

以苯酚、聚乙二醇（PEG-6000）、腐殖酸为研究对象，采用活性炭为吸附剂，对椰壳活性炭在4组不同粒径范围（150～2000μm）的吸附能力进行比较。结果表明：活性炭对苯酚的吸附量与微孔比表面积成正比；对PEG-6000的吸附量与中孔比表面积成正比。在吸附苯酚时，粒径小于150μm的活性炭吸附能力是粒径1000～2000μm活性炭的1．2倍；吸附PEG-6000和腐殖酸时，粒径小于150μm活性炭的吸附能力是粒径1000-2000μm的4倍和1．2倍。

Phenol, PEG-6000 and humic acid have been studied by using active carbon as adsorbent. The adsorp- tion capacity of coal quality and coconut shell activated carbon in four groups with different particle size ranges （ 150-2 000μm） are compared. The results show that the activated carbon adsorption capacity for phenol is directly proportional to micro pore specific surface area,and activated carbon adsorption capacity for PEG-6000 is proportional to medium pore specific surface area. As to the adsorption capacity for phenol, the activated carbon with particle size being smaller than 150μm is 1.2 times of activated carbon with particle size being 1 000-2 000 μm. As to the adsorption capacity for PEG-6000 and humic acid, the particle size of activated carbon being smaller than 150 μm is 4 times and 1.2 times of activated carbon with particle size being 1 000-2 000 μm.