树皮–透水性树脂复合材料重金属离子吸附性研究

Research on Tree Barks and Their Hybrid Materials with Hydrophilic Polymers as Adsorbents for Heavy Metal Ions

摘要: 重金属污染是当前最重要的环境问题之一。本文制备树皮–透水性树脂复合材料，通过测试重金属离子随时间的变化，研究树皮及其复合材料对放射性重金属Cs⁺和Sr²⁺的吸附去除性能，同时还研究了树皮对Co²⁺、Cu²⁺、Cd²⁺的吸附性能。结果表明，杉树皮和丝柏树皮均表现较好的重金属吸附能力，20 h后的杉树皮对重金属的吸附去除率均在85%以上，丝柏树皮对重金属的吸附去除率均在75%以上。树皮–透水性树脂复合材料一方面避免了树皮纤维粉末不固定，容易飞扬的问题，另一方面没有对树皮吸附重金属性能造成影响。

Abstract: Heavy metal pollution is one of the most important environmental problems. In this paper, bark-permeability resin composite materials were prepared. By testing heavy metal variation with time, we have evaluated the adsorption ability of the bark of fir and cypress, and their hybrid materials with hydrophilic polymers, for cesium, strontium, and other heavy metal ions such as cobalt, copper and cadmium. The result shows the bark of fir and cypress having excellent adsorp-tion capacity of heavy metals, and that the removal rates of heavy metal ions are above 85% and 75% respectively for the bark of obtuse after treating 20 h. On the one hand, the bark fiber is fixed, avoiding easy to fly by bark-permeability resin composite materials, on the other hand, Polymer has no effect on the absorption of heavy metals for the bark of trees. These materials can be used as adsorbents for a water and soil purification system.