腐植酸及其结构特性对LDHs的结构记忆效应吸附硼酸的影响机制

项目名称： 腐植酸及其结构特性对LDHs的结构记忆效应吸附硼酸的影响机制

项目编号： No.51504170

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 邱心泓

作者单位： 武汉工程大学

项目金额： 20万元

中文摘要： 层状双金属氢氧化物(LDHs)是一种典型的粘土矿物，其结构记忆效应被广泛应用于污染物吸附。但环境中普遍存在的腐植酸对该效应的影响机制尚不清晰，获得相应的理论对LDHs的现实化应用具有重要意义。项目首先选用模型化合物，将腐植酸大分子体系分解为小分子结构，利用现代分析手段获取不同时刻固液中的元素化学状态和晶体结构的变化，明确腐植酸及其结构特性对结构记忆效应反应过程中金属的溶出再结晶、形貌结构、结晶度等的影响。并以此为基础，以硼酸为目标阴离子，综合腐植酸及其模型化合物与硼酸、硼酸与LDHs结构记忆效应的相互作用的研究结果，展开腐植酸或模型化合物存在下LDHs结构记忆效应对硼酸吸附的研究。分析各反应过程中硼的吸附、LDHs再生速率、结构组成、形貌、结晶度、铝和硼的化学位移和配位等的变化规律，揭示影响材料对硼酸吸附的关键因素和过程。该项目能发展除硼技术，丰富结构记忆效应的理论，促进其实用化。

中文关键词： 腐植酸；模型化合物；结构记忆效应；层状双金属氢氧化物；硼酸

英文摘要： As a clay mineral, the structural memory effect of layered double hydroxides (LDHs) is widely applied in pollutant adsorption. However, the process and influencing mechanism of humic acid on structural memory effect for anion removal are still unclear. Access to the relative theories is significant to the application of LDHs. This project firstly selects different model compounds and decomposes macromolecule system of humic acid into micromolecular structure. Through obtaining change of chemical state of elements and crystal structure in solid and liquid at different times by modern analytic measurements, the influence of humic acid and its functional group on the dissolution-recrystallization, morphology, structures and crystallinity of regenerate LDHs in the process of structure memory effect will be clarified. Based on this first step, taking borate as target anion and integrating the studies on the interaction between structural memory effect of humic acid with its model compound and borate, borate and LDHs, this project sequentially conducts the study about the structural memory effect of LDHs on adsorption of borate in the system of existing humic acid or its model compound. Through studying on adsorption efficiency of borate, regeneration rate of LDHs, structural composition, crystallinity of LDHs, chemical shift and coordination of aluminum and boron in each reaction, the key factors and key process that influence the adsorption of borate by the structures memory effect of LDHs will be revealed. This project can enrich the relevant theories of the structural memory effect of LDHs, develop technology for removing borate from water and promote its practical application.

英文关键词： Humic acid;Model compound;Structural memory effect;Layered double hydroxides;Borate