KMS XINJIANG INSTITUTE OF ECOLOGY AND GEOGRAPHY，CAS
| 疏水改性聚氨酯修复邻苯二甲酸二丁酯污染土壤 | |
| 刘帅 | |
| Subtype | 硕士 |
| Thesis Advisor | 潘响亮 |
| 2018-06-01 | |
| Degree Grantor | 中国科学院大学 |
| Place of Conferral | 新疆乌鲁木齐 |
| Degree Discipline | 理学硕士 |
| Keyword | 疏水材料 邻苯二甲酸二丁酯 吸附 土壤 Hydrophobically material Dibutyl phthalate Adsoption Soil |
| Abstract | 邻苯二甲酸二丁酯是一种具有内分泌干扰作用的疏水性有机污染物，其引起的污染问题迫切需要一种有效的方式将其解决。本文通过多巴胺聚合的方法将三种纳米颗粒负载到聚氨酯海绵的表面，同时涂覆正十二烷基硫醇以降低表面能，制得疏水性良好的材料。选用邻苯二甲酸二丁酯作为目标污染物，在水体与土壤体系中进行吸附修复实验。主要研究结果如下：（1） 在水体中，改性材料对邻苯二甲酸二丁酯具有良好的吸附效果， 性材料的最大吸附量可以达到约 22mg/g，使用正己烷可以回收材料多次使用， 并且受 pH、盐度等的影响较小，吸附动力学符合伪二级动力学方程，等温线则更好地用 Freundlich 模型进行解释。纳米颗粒作为对比进行相关的实验，结果表明，纳米颗粒对邻苯二甲酸二丁酯的吸附效果远大于改性材料的吸附效果， 其最大吸附量可以达到约 220mg/g， 从而可以反映出改性材料对邻苯二甲酸二丁酯的吸附性能很大程度上是由负载的纳米颗粒决定的。（2） 土壤矿物—高岭土、伊利土、蒙脱土与石英砂体系作为土壤体系的简化用于修复实验研究，改性材料对以上四种土壤矿物中的邻苯二甲酸二丁酯均具有良好的修复效果，去除率均能达到 80%左右。 β-环糊精的使用大大提高了修复的效率。（3） 实验选用棉田土、黑土、黄土与红土四种具有代表性的土壤进行改性材料对邻苯二甲酸二丁酯污染修复实验的研究，并且对不同粒径的颗粒—沙粒、粉粒、黏粒进行实验。结果表明：疏水改性聚氨酯海绵对四种土壤中的邻苯二甲酸二丁酯均具有良好的修复效果，修复率在 60-85%之间，随着修复材料的使用量增加，邻苯二甲酸二丁酯的修复效率也随之提高。 β-环糊精的使用提高了邻苯二甲酸二丁酯的修复效果。改性材料对不同粒径组分中的邻苯二甲酸二丁酯均具有良好的修复效果，修复率均高于 70%，其中粉粒组分对于邻苯二甲酸二丁酯的空持量最大，改性材料对土壤中邻苯二甲酸二丁酯的修复也主要是对于这部分。以上说明，本实验疏水改性的聚氨酯海绵材料对于水体、土壤中的邻苯二甲酸二丁酯均具有良好的修复效果， 在环境中的邻苯二甲酸二丁酯污染修复展现出巨大的潜力。 |
| Other Abstract | Dibutyl phthalate is a hydrophobic organic contaminant with endocrine disruptingeffect. The pollution caused by it urgently needs an effective way to solve it.In this paper, three kinds of nanoparticles were loaded onto the surface of thepolyurethane sponge by dopamine polymerization, and n-dodecyl mercaptan wasapplied at the same time to reduce the surface energy, resulting in a hydrophobicmaterial. Dibutyl phthalate was selected as the target contaminant to performadsorption experiments in water and soil systems. The main findings are as follows:(1) In the water body, the modified material has a good adsorption effect on dibutylphthalate, and the maximum adsorption amount of the material can reach about 22mg/g, and the material can be recycled using n-hexane for multiple times and issubject to pH The influence of salinity, etc. is smaller, the adsorption kineticsconforms to the pseudo-second-order kinetic equation, and the isotherm is betterexplained by the Freundlich model. Nanoparticles were used as comparativeexperiments. The results showed that the adsorption effect of nanoparticles on dibutylphthalate was much larger than that of modified materials. The maximum adsorptioncapacity of nanoparticles could reach about 220 mg/g, which reflected the change.The adsorption of dibutyl phthalate by the material is largely determined by theloaded nanoparticles.(2) Soil minerals—kaolin, illite, montmorillonite, and quartz sand systems wereused as a simplified soil system for restoration experiments. The modified materialswere good for dibutyl phthalate in the above four soil minerals. The repair effect, theremoval rate can reach 80%. The use of β-cyclodextrin greatly improves theefficiency of repair.(3) Experiments using four representative soils of cotton field soil, black soil, loess,and red soil were conducted to study the restoration of dibutyl phthalate pollution, andthe particles of different particle sizes - sand, powder Granules and cohesives were tested. The results showed that the hydrophobic modified polyurethane sponge hadgood repair effect on dibutyl phthalate in four kinds of soils. The repair rate wasbetween 60-85%. With the increase of the amount of repair materials, The repairefficiency of dibutyl formate has also increased. The use of β-cyclodextrin improvesthe repair effect of dibutyl phthalate. The modified material has good repair effect ondibutyl phthalate in different particle size components, and the repair rate is higherthan 70%, among which the powder particle component is free of dibutyl phthalate.At the most, the modification of dibutyl phthalate in soil by modified materials is alsomainly for this part.The above description shows that the hydrophobically modified polyurethanesponge material in this experiment has a good repair effect on water and dibutylphthalate in the soil, and shows great potential for the restoration of dibutyl phthalatein the environment. |
| Subject Area | 环境科学 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.xjlas.org/handle/365004/14975 |
| Collection | 研究系统_荒漠环境研究室 |
| Affiliation | 中国科学院新疆生态与地理研究所 |
| First Author Affilication | 中国科学院新疆生态与地理研究所 |
| Recommended Citation GB/T 7714 | 刘帅. 疏水改性聚氨酯修复邻苯二甲酸二丁酯污染土壤[D]. 新疆乌鲁木齐. 中国科学院大学,2018. |
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