4種活性炭吸附典型內分泌干擾物DBP的特性

在測定4種顆粒狀活性炭常規性能指標 (比表面積、亞甲基蘭值、碘值、苯酚值) 的基礎上，測定了4種活性炭對水中微量內分泌幹擾物鄰苯二甲酸二丁酯 (DBP) 的吸附等溫線以及吸附效果，同時對活性炭的電化學再生進行了研究。結果表明：35℃時，4種活性炭均能有效地去除DBP，去除率高達90%以上；煤質1.0、煤質1.5、果殼和椰殼飽和吸附量分別為52.52、29.90、159.3、147.2 mg/g。根據Langmuir和Freundlich吸附模型對DBP吸附等溫線進行擬合，更符合Freundlich模型。活性炭對DBP吸附量的大小與其比表面積、亞甲基蘭吸附量、碘值、苯酚值存在一定的關系，為選擇合適的活性炭來處理水中微量鄰苯二甲酸類化合物提供參考依據。
Based on measuring the general performance parameters of four granule activated carbons (GACs), including surface area, Methylene Blue value, phenol value and iodine number, the equilibrium adsorption isotherm and adsorption effect for the removal of minim endocrine disruptor di-n-butyl phthala (DBP) from aqueous solution have been investigated by using these four different GACs, and the electrochemical regeneration efficiency is measured in room temperature. Results indicated that the four GACs can remove the DBP effectively at 35℃, and the removal rate is over 90%; maximum adsorption capacity of 52.52, 29.90, 159.3 and 147.2 mg/g at equilibrium were achieved for the Coaly carbon 1.0, Coaly carbon 1.5, nut shell and coconut shell activated carbons respectively. The Freundlich isotherm was found to best fit the experimental data over the whole concentration range. Adsorption capacities of the four different activated carbons have relations with their surface area, Methylene Blue value, phenol value and iodine number, and this supplies reference for choosing right activated carbons to remove phthalates in the water. Copyright © 2008 華南師範大學.