摘要
新疆农田土壤及周边河湖沉积物中酞酸酯污染非常严重,由于干旱的气候条件,现有微生物修复技术往往难以适用治理新疆地膜造成的酞酸酯污染。因此,迫切需要研发酞酸酯污染土壤及水体的修复技术及材料。基于应用材料表面的强疏水性对酞酸酯的优异吸附性能的原理,采用多巴胺聚合将3种纳米颗粒（BN、Si O2、Fe3O4）改性得到疏水性良好的材料,并通过SEM-EDS、ATR-FTIR光谱、Raman光谱、N2吸附脱附曲线等对改性材料进行表征。以新疆地膜污染土壤中常见的酞酸酯、邻苯二甲酸二丁酯作为目标污染物进行吸附性能实验,结果表明：所研发的改性材料对邻苯二甲酸二丁酯具有良好的吸附效果,平衡吸附量可达218.63 mg·g-1;吸附可以在220 min内达到平衡,吸附动力学符合准二级动力学方程;吸附等温线用Langmuir与Freundlich模型均能良好的拟合,后者的相关性更好;并在p H（2-12）与氯化钠盐度（高达4%）下,材料就能保持良好的吸附效果。该材料在修复干旱区酞酸酯污染土壤、沉积物及水体中具有广阔应用前景。
Plastic film mulching is the most intensively applied in agricultural production in Xinjiang Uygur Autonomous Region,but a serious phthalate pollution is caused in farmland soil and lake or river sediments.Application of the traditional bioremediation technologies is strongly challenged in this area due to the extremely arid climate.It is urgent to develop the remediation technologies and materials suitable in arid region.In this study,three kinds of nanoparticles（BN,Si O2and Fe3O4）were modified to be as the hydrophobic material surface by polymerization of dopamine based on considering the strong hydrophobicity of materials with a strong adsorption capacity for phthalate.The materials were characterized by SEM-EDS,ATR-FTIR spectroscopy and Raman spectroscopy.The results showed that the adsorbent has an excellent adsorption capacity for dibutyl phthalate,the equilibrium adsorption capacity could be as high as 218.63 mg·g-1,and an equilibrium could be achieved within 220 minutes.The adsorption kinetics follows the pseudo-second order kinetic equation.Both the Langmuir and Freundlich models could be used to satisfactorily describe the kinetics.A strong dibutyl phthalate adsorption capability could be maintained under p H value range from 2 to 12 and at a salinity of 40 g·L-1.This nanomaterial adsorbent has a great potential in remediation of phthalate pollution of farmland soil and lake or river sediments.
作者
刘帅
潘响亮
LIU Shuai;PAN Xiang-liang(Xinjiang Key Laboratory of Environmental Pollution and Bioremedintion,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Environment,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China)
出处
《干旱区研究》
CSCD
北大核心
2018年第5期1084-1090,共7页
Arid Zone Research
基金
国家重点研发计划项目(2016 YFC 0501404)资助
关键词
地膜污染
土壤
水体
酞酸酯
疏水改性
纳米颗粒
吸附
新疆
field film pollution
soil
water
phthalate
hydrophobicity
nanoparticle
adsorption
Xinjiang
