4种活性炭吸附典型内分泌干扰物DBP的特性

CHARACTERISTIC OF TYPICAL ENDOCRINE DISRUPTOR DBP ADSORBED USING FOUR DIFFERENT ACTIVATED CARBONS

在测定4种颗粒状活性炭常规性能指标(比表面积、亚甲基兰值、碘值、苯酚值)的基础上,测定了4种活性炭对水中微量内分泌干扰物邻苯二甲酸二丁酯(DBP)的吸附等温线以及吸附效果,同时对活性炭的电化学再生进行了研究.结果表明:35℃时,4种活性炭均能有效地去除DBP,去除率高达90%以上;煤质1.0、煤质1.5、果壳和椰壳饱和吸附量分别为52.52、29.90、159.3、147.2 mg/g.根据Langmuir和Freundlich吸附模型对DBP吸附等温线进行拟合,更符合Freundlich模型.活性炭对DBP吸附量的大小与其比表面积、亚甲基兰吸附量、碘值、苯酚值存在一定的关系,为选择合适的活性炭来处理水中微量邻苯二甲酸类化合物提供参考依据.

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 gated by using these four different GACs, （DBP） from aqueous solution have been investi- and the electrochemical regeneration efficiency is measured in room temperature. Results indicated that the four GACs can remove the DBP effectively at 35 ~C, 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.