School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
Bioresour Technol. 2010 Apr;101(7):2558-61. doi: 10.1016/j.biortech.2009.10.069. Epub 2009 Nov 25.
A novel kind of complex gel beads containing HPAM (hydrolyzed polyacrylamide) and chitosan components (HPAM-chitosan gel beads) was prepared and applied in the removal of Cu(2+), Pb(2+), and Hg(2+) ions from aqueous solutions. These gel beads exhibited a good performance for heavy metal removal. Moreover, the average diameter of these gel beads was about 1mm, which could be appropriate for use in column system. The removal order was Pb(2+)>Cu(2+)>Hg(2+) under the same conditions. The effects of different experimental parameters, such as adsorbent dosage, initial pH, temperature, and initial metal concentration, on the adsorption capacities were studied. The Freundlich model gave a better fit to the experimental data than the Langmuir model in adsorption isotherm study. Desorption study indicated that the gel beads were easy to be regenerated.
一种新型的含有 HPAM（水解聚丙烯酰胺）和壳聚糖成分的复合凝胶珠（HPAM-壳聚糖凝胶珠）被制备出来，并应用于从水溶液中去除 Cu(2+)、Pb(2+)和 Hg(2+)离子。这些凝胶珠对重金属去除表现出良好的性能。此外，这些凝胶珠的平均直径约为 1mm，可适用于柱系统。在相同条件下，去除顺序为 Pb(2+)>Cu(2+)>Hg(2+)。研究了不同实验参数，如吸附剂用量、初始 pH 值、温度和初始金属浓度对吸附容量的影响。吸附等温线研究表明，Freundlich 模型比 Langmuir 模型更能拟合实验数据。解吸研究表明，凝胶珠易于再生。
