研究了自合成的巯基树脂对重金属离子Ag+、Hg2+、Cr3+的吸附容量、吸附动力学、等温吸附过程等静态吸附性能,影响吸附的因素和吸附机理。结果表明,该树脂对上述3种离子吸附能力强,吸附量分别达6.56mmol/g、3.25mmol/g、2.10mmol/g。树脂对各重金属离子等温吸附在实验浓度范围内符合Langmuir或Freundlich方程。吸附机理研究表明,巯基与金属离子发生了离子交换和配位反应,化学吸附起支配作用;另外树脂对Ag+、Hg2+吸附过程中存在一定的氧化还原现象。 The adsorption capacity, adsorption kinetics and isothermal adsorption processes of the heavy metal ions Ag +, Hg2 + and Cr3 + were investigated. The factors that affect the adsorption and the adsorption mechanism were studied. The results show that the resins have strong adsorption capacity for the above three ions, and their adsorption amounts are 6.56mmol / g, 3.25mmol / g and 2.10mmol / g, respectively. Isothermal adsorption of heavy metal ions on the resin conforms to the Langmuir or Freundlich equation over the experimental concentration range. Adsorption mechanism studies show that the sulfhydryl and metal ions ion exchange and coordination reactions, chemical adsorption play a dominant role; other resin for Ag +, Hg2 + adsorption process there is a certain redox phenomenon.