摘要
二氧化钛(TiO_(2))具有比表面积大、孔隙结构丰富、性质稳定、制造成本低且无毒等特点,可作为吸附剂和光催化剂用于吸附处理含重金属、有机染料等污染物的废水。本工作通过对TiO_(2)吸附废水中常见有机染料影响因素进行综合分析,综述了不同影响因素对吸附效果的影响,并讨论了复合改性、掺杂改性以及有机溶液改性等方式对TiO_(2)吸附染料性能的影响,文献表明通过改性手段可丰富TiO_(2)的孔隙结构,提高TiO_(2)基吸附材料的比表面积,增加其表面的活性位点,进而改善其吸附性能。吸附动力学和热力学数据分析表明,TiO_(2)吸附废水中有机染料过程中动力学主要遵循准二级动力学模型,热力学符合Langmuir模型单分子层吸附或Freundlich模型。其吸附机理主要包括静电吸引、n-π堆积相互作用、氢键等。TiO_(2)体系作为吸附剂吸附处理废水中的染料分子,具有高效、环保、绿色经济的优势,可在今后的废水处理领域中起到至关重要的作用,可以作为一种具备广阔应用前景的绿色材料而展开研究。
Titanium dioxide(TiO_(2))has the characteristics of large specific surface area,rich pore structure,stable properties,low manufacturing cost and nontoxicity.It can be used as an adsorbent and photocatalyst to adsorb and treat wastewater containing heavy metals,organic dyes and other pollutants.In this work,the influencing factors in the process of TiO_(2) adsorption to common organic dyes in wastewater is comprehensively analyzed,the influence of different influencing factors on the adsorption effect is summarized,and the effects of composite modification,doping modification and organic solution modification on the dye adsorption performance of TiO_(2) are discussed.The literature indicates that modification methods play an important role in enriching the pore structure of TiO_(2),increasing the specific surface area of the TiO_(2) based adsorption materials and the active sites on the surface,followed by improving its adsorption performance.The analysis of adsorption kinetics and thermodynamics data exhibits that the kinetics of TiO_(2) in the process of adsorbing organic dyes in wastewater mainly follows the pseudo-secondary kinetic model,and the thermodynamics accords with the Langmuir model monolayer adsorption or the Freundlich model.Its adsorption mechanism mainly includes electrostatic attraction,the interaction of n-πstacking and hydrogen bonding,and so on.The TiO_(2) system is used as an adsorbent to adsorb and treat dye molecules in wastewater,it has the advantages of high efficiency,environmental protection,and low production cost.It can play a vital role in the field of wastewater treatment in the future and can be studied as a green material with broad application prospects.
作者
赵晓腾
周新涛
罗中秋
韦宇
兰雄
陆艳
Xiaoteng ZHAO;Xintao ZHOU;Zhongqiu LUO;Yu WEI;Xiong LAN;Yan LU(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650500,China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2022年第9期1169-1180,共12页
The Chinese Journal of Process Engineering
基金
国家自然科学基金地区基金(编号:21866018)。
关键词
二氧化钛
染料
吸附
改性
吸附机理
TiO_(2)
dye
adsorption
modification
adsorption mechanism
