Belmouden M, Assabbane A, Ichou Y A
Laboratoire de Chimie Physique (Equipe Photocatalyse et Environnement), Université Ibnou Zohr, Faculté des Sciences, Agadir, Morocco.
J Environ Monit. 2000 Jun;2(3):257-60. doi: 10.1039/a909357e.
The adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) by two powdered coal activated carbons was studied in aqueous solution. The modelling of the adsorption equilibrium showed that the adsorption of 2,4-D fitted a Langmuir isotherm. Adsorption was influenced by the activated carbon type, adsorbent concentration and solution characteristics. The adsorption was found to decrease with an increase in pH over the range 1.5-9. Maximum adsorption occurred at pH approximately 2.5, which corresponds to the 2,4-D pKa value. The amount of 2,4-D adsorbed was also found to depend on the NaCl concentration.
研究了两种粉末状煤质活性炭对水溶液中2,4-二氯苯氧乙酸（2,4-D）的吸附作用。吸附平衡模型表明，2,4-D的吸附符合朗缪尔等温线。吸附受活性炭类型、吸附剂浓度和溶液特性的影响。发现在1.5 - 9的pH范围内，随着pH值的升高，吸附量降低。最大吸附量出现在pH约为2.5时，这与2,4-D的pKa值相对应。还发现2,4-D的吸附量取决于NaCl浓度。
