Abstract: In order to conduct deep treatment of low concentration petrochemical wastewater, a novel type of polystyrene (PS) microsphere adsorption resin was synthesized by emulsion polymerization of styrene, butyl acrylate and polymerizable quaternary ammonium salt by emulsion polymerization.The resin was characterized by IR,SEM and BET,and compared with several commercially available adsorption resins D301,XAD⁃4 and NDA⁃150.The results show that the synthetic resin has an irregular spherical shape with a diameter of 0.2~0.4 mm,and the COD of the petrochemical secondary wastewater can be reduced from 100 mg/L to below 20 mg/L within 24 h.The adsorption behavior of this resin on petrochemical wastewater is close to that of monolayer,and the saturated adsorption amount reaches 89 mg/g,which was higher than the commercially available resins D301 (85.5 mg/g),NDA⁃150 (30.4 mg/g) and XAD⁃4 (58.8 mg/g).Ozone oxidation regeneration results show that the synthesized PS resin can be recycled more than 4 times,which has better regeneration performance than other conventional adsorption resins. This material can be used as an excellent adsorbent for treating petrochemical wastewater in advanced treatment processes for low⁃concentration wastewater.

Key words: Adsorption resins, Emulsion polymerization, Petrochemical wastewater, Ozone oxidation regeneration

摘要： 为了对低COD的石化废水进行深度处理，通过乳液聚合法将苯乙烯、丙烯酸丁酯、可聚合季铵盐进行三元共聚，以一步法合成了一种新型聚苯乙烯（PS）微球吸附树脂。采用IR、SEM、BET等手段对树脂进行表征，并与市售吸附树脂D301、XAD⁃4、NDA⁃150进行了结构和性能的对比。结果表明，合成树脂呈不规则球形，直径在0.2~0.4 mm，24 h内可将石化二级废水的COD从100 mg/L降至20 mg/L以下。该树脂对石化废水的吸附行为接近单分子层的吸附，饱和吸附量达到89.0 mg/g，高于市售树脂D301(85.5 mg/g)、NDA⁃150(30.4 mg/g)以及XAD⁃4(58.8 mg/g)。臭氧氧化再生结果表明，合成的PS树脂可循环再生4次以上，较其他几种传统的吸附树脂具有更好的再生性能。该材料可以作为处理石化废水的良好吸附剂应用于低COD废水的深度处理工艺中。

关键词: 吸附树脂, 乳液聚合, 石化废水, 臭氧氧化再生