提高层状双金属氢氧化物水中吸附性能研究进展

介绍了LDH这类绿色环保、结构独特、理化性能优异的高效吸附剂,归纳了国内外科研工作者对于LDH材料在水处理方面的研究成果,分析了LDH吸附性能的影响因素并解释了污染物的吸附机理。认为吸附剂的吸附能力与自身结构和特性有关,可以通过增大比表面积和改变表面化学性质来提高吸附剂吸附性能。表面改性使LDH具有吸附专向性,提高了对特定污染物的吸附效率;改变形貌结构增大了吸附剂的比表面积和孔隙率,为LDH提供更多的吸附位点,为离子转输提供了有利条件。

Research Progress on Improving the Adsorption Property of Layered Double Hydroxide in Water

The high-efficiency adsorbent such as LDH,which is green,structurally unique,and excellent in physical and chemical properties was introduced,the study achievement of domestic and foreign researchers about LDH in water treatment was summarized,the influencing factors of LDH adsorption properties was analyzed and the adsorption mechanism of pollutants was explained.It is believed that the adsorption capacity of the adsorbent is related to its structure and characteristics,and adsorption properties of the adsorbent can be improved by increasing the specific surface area and changing the surface chemical properties.Surface modification makes LDH have adsorption specificity and improves the adsorption efficiency of specific pollutants;changing the morphology and structure increases the specific surface area and porosity of the adsorbent,which provides more adsorption sites for LDH and favorable conditions for ion transfer.