期刊论文

中文

岩矿测试

0254-5357

2016

35

1

62-68

10.15898/j.cnki.11-2131/td.2016.01.011

武汉市科技局应用基础研究项目

本校为第一机构

桑树叶富含植物多酚和黄酮类化合物,表面存在着大量羟基、羧基功能基团,在一定条件下通过络合作用或静电作用能与重金属离子发生吸附作用。但由于生物质中普遍存在着可溶性单宁,直接使用生物质吸附废水中的镉,去除效果不够理想。本文以生物质桑树叶为原料,经沸水蒸煮去除小分子和稀磷酸酸化改性,提高桑树叶的吸附容量,制备成活性吸附材料去除废水中的Cd(Ⅱ)。吸附条件实验表明:在pH = 4.0时改性桑树叶对Cd(Ⅱ)的吸附效果最佳,当Cd(Ⅱ)初始浓度为150 mg/L,改性桑树叶的添加量为6 g /L时吸附率可达96.58%。化学改性桑树叶对Cd(Ⅱ)的吸附过程符合准二阶动力学方程,Langmuir等温吸附模型能更好地描述...

Mulberry leavesare rich in plant polyphenol and flavonoid. Amounts of hydroxyl and hydroxyl functional groups are distributed on the surface, which can be absorbed with heavy metal ions by complexation and electrostatical processes. However,there are commonly soluable tannic in organisms and it is not suitable to use organisms to remove Cd from waste water. In this study,mulberry leaves were used as the experimental materials and were boiled and modified with 1 mol / L H3PO4 to prepare an adsorbent for cadmium. Results show that the absorption ...