【作者】 戴丽君；

【导师】 吴宗华；

【作者基本信息】 福建师范大学 ， 高分子化学与物理， 2007， 硕士

【摘要】 为充分利用我国丰富的黑荆树皮资源，满足现代重金属废水对吸附剂的更高要求，本文对黑荆树皮进行改性，并研究其对重金属离子的吸附性能。本论文主要研究内容如下：第二章中首次将胶体滴定法用于栲胶（黑荆树皮栲胶和橡梳栲胶）中的单宁含量的测定，探讨了影响测定结果的部分因素。结果表明，用胶体滴定法测定栲胶中的单宁含量有较高的准确度和精密度，具有快速、简便、样品用量少的特点，适用于微量测定和大批量样品的快速测定。第三章主要考察了通过甲醛的交联作用使单宁在黑荆树皮内的原位固化的反应条件对树皮得率的影响，并研究了原位固化黑荆树皮对Fe³⁺的吸附特性。结果表明，原位固化黑荆树皮对Fe³⁺具有良好的吸附能力，可望用于工业废水中铁离子的吸附。第四章进一步研究了原位固化黑荆树皮对Cr⁶⁺的吸附性能，并推测了其吸附机理。结果表明，原位固化黑荆树皮对Cr⁶⁺也具有良好的吸附能力。为了解决对原位固化黑荆树皮对Cu²⁺、Zn²⁺、Ni²⁺等离子吸附容量小的问题，第五章中，进一步对原位固化黑荆树皮氧化改性，考察其对金属离子，特别是Cu²⁺离子的吸附容量以及影响吸附的因素。更多还原

【Abstract】 To make new adsorbents for processing heavy metals wastewater, black wattle bark with high content of tannin was reacted with formaldehyde to fix the tannin in the bark. The adsorption properties of the midified adsorbents to heavy metal ions were investigated. The main contents in this paper include, in chaper 2, a colloidal titration was used to determine tannin content in valonea extract and black wattle tannin extract, and the accuracy and influential factors were discussed. The colloidal titration is showed to have the advangtage of rapidity, simplicity and small sample dosage comprared with traditional hide powder method. In chaper 3, tannins in black wattle bark were immobilized in situ by cross-linking reaction of formaldehyde. The effects of the reaction conditions on yields of in situ immobilized black wattle bark were disccused. It was found that this new adsorbent has good adsorption capacity to Fe³⁺ ion. In chapter 4 the adsorption behavior of the in situ immobilized black wattle bark to Cr⁶⁺ was studied, and its adsorption mechanism was presumed. The results were that the adsobent has good adsorption capacity to Cr⁶⁺. In chapter 5, the oxidation of the in situ immobilized black wattle bark was carried out to improve adsorption quantity of the bark to Cu²⁺ ion, and the factors influencing adsorption of the oxidized bark to Cu²⁺ was investigated更多还原