通过批量平衡法，研究开放系统条件下方解石对丙二酸的吸附特性．结果表明，丙二酸在方解石上的吸附先快后慢，3 h后渐趋平衡；当pH值从7．7增加到9．7时，丙二酸的吸附率逐渐降低，HCO－3和CO2－3的竞争效应及方解石表面的静电效应是其主导因素；同一初始浓度下，与开放系统条件比较，半封闭系统条件下丙二酸的吸附量显著降低，推测其原因是半封闭系统中OH－的竞争作用．丙二酸与邻苯二甲酸的等温吸附结果对比发现，丙二酸的吸附能力较邻苯二甲酸更强，丙二酸的等温吸附过程符合Langmuir模型，而邻苯二甲酸的等温吸附过程更符合Freundlich模型，推测以上差异是由两羧基之间的分子结构不同引起的．
Batch methods were deployed to study the sorption of malonate on calcite in open?system. Results show that:malonate sorption increased rapidly with time initially and then reached between equilibrium within 3 hours. The malonate sorption rate decreased with in pH 7.7—9.7. This is due to the competition effect of HCO-3 and CO2-3 , and the electrostatic effect on the surface; At the same initial concentration, compared to open?system, the malonate adsorption quantity in half?closed system was relatively small, which may be due to the obvious competition effect of OH- in half?closed system. Compared with o?phthalate, malonate sorption capacity was higher and its sorption isotherm was better described by Langmuir model. The sorption isotherm of o?phthalate was better described by Freundlich model. These differences may be attributed to the different structures between their two carboxyl groups.
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