贝壳基吸附材料对四种重金属吸附性能研究

发布时间：2018-10-08 13:49

【摘要】：以贝壳为原材料,制备了贝壳粉以及贝壳粉为钙源的羟基磷灰石材料。采用制备的两种贝壳基材料与两种商品化的螯合树脂进行对比研究,考察四种材料对铅、镉、铬、铜四种重金属的脱除性能,对不同p H,吸附平衡时间以及金属离子浓度下对应的吸附量进行了研究。并对四种材料的吸附动力学性质和吸附等温线进行了分析。结果表明:四种材料在p H为7时脱除重金属效果最佳,贝壳粉和羟基磷灰石材料的吸附平衡时间为60 min,是商品化树脂吸附平衡时间的三分之一。四种材料中贝壳基羟基磷灰石对四种重金属都具有最高的吸附量,对铅、镉、铬、铜的平衡吸附量达到20.0、2.5、9.5和7.5 mg/g。采用羟基磷灰石对贝肉蒸煮液中重金属进行了脱除研究,对铅、铬、镉、铜的脱除率分别达到109.88%、51.68%、76.02%、52.17%。与商品化树脂相比,贝壳基材料对重金属离子具有更优的吸附效果。
[Abstract]:The hydroxyapatite materials with shell powder and shell powder as calcium source were prepared with shell as raw material. Two kinds of shell based materials were prepared and two commercial chelating resins were used to study the removal properties of lead, cadmium, chromium and copper. The adsorption equilibrium time and the adsorption capacity of metal ions at different pH were studied. The adsorption kinetic properties and adsorption isotherms of four kinds of materials were analyzed. The results showed that the adsorption equilibrium time of shell powder and hydroxyapatite was 60 min, and the adsorption equilibrium time of commercial resin was 1/3. Among the four materials, shell hydroxyapatite has the highest adsorption capacity for the four heavy metals, and the equilibrium adsorption capacity for lead, cadmium, chromium and copper is 20.0 ~ 2.5g / 9.5 and 7.5 mg/g. respectively. The removal of heavy metals from shellfish cooking solution was studied by hydroxyapatite. The removal rates of lead, chromium, cadmium and copper were 109.88 and 51.68 respectively. Compared with commercial resin, shell-based materials have better adsorption effect for heavy metal ions.
【作者单位】：大连海洋大学食品科学与工程学院辽宁省水产品分析检验及加工技术科技服务中心;
【基金】：国家海洋公益项目子课题(201505030-6) 大连市支持高层次人才创新支持计划项目(2016RQ068) 国家科技支撑计划(2014BAK13B01)
【分类号】：O647.3

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