Dithizone is known to be very effective for heavy metal ions retention and widely used as developer in detection methods. To explore a novel surface modified polymer microspheres, this paper prepared a novel modified polystyrene (PS-g-D) microspheres by grafting dithizone as the complexing agent and developer on the surface of PS microspheres. The structure of PS-g-D was analyzed by FT-IR, and the formation of dithizone grafted PS microspheres was proved. The thermal stability and surface morphology of PS and modified PS were studied by TGA and SEM. PS-g-D had a uniform diameter of about 1 μm and exhibited a good thermal stability. The Pb²⁺ removal increased and reached up to 99% with the decrease of initial Pb²⁺ concentrations. The study of the isotherms model showed that the adsorption between PS-g-D and Pb²⁺ is consistent with the Langmuir and Temkin adsorption isotherm models. The adsorption kinetics of PS-g-D is described well by the pseudo-second-order model. It can be seen that the modified PS microspheres exhibit a good adsorption property, and has real potential as a novel adsorbent for water treatment industry due to the introduction of dithizone as complexing agent and developer.

已知双硫zone对重金属离子的保留非常有效，并广泛用作检测方法中的显影剂。为了探索一种新型的表面改性聚合物微球，本文通过将双硫th作为络合剂和显影剂接枝到PS微球表面上，制备了一种新型的改性聚苯乙烯（PS-gD）微球。FT-IR分析了PS-gD的结构，证明了双硫zone接枝的PS微球的形成。用TGA和SEM研究了PS和改性PS的热稳定性和表面形貌。PS-gD具有约1μm的均匀直径，并表现出良好的热稳定性。随着初始Pb ²⁺的减少，Pb ^2+的去除率增加并达到99％浓度。等温线模型的研究表明，PS-gD和Pb ²⁺之间的吸附与Langmuir和Temkin吸附等温线模型一致。PS-gD的吸附动力学可以通过拟二级模型很好地描述。可以看出，由于引入了双硫zone作为络合剂和显影剂，改性的PS微球具有良好的吸附性能，并具有作为水处理行业新型吸附剂的实际潜力。