| 预处理对河道底泥固化效果的影响 |
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| 引用本文： | 李玉祥,陈维芳,陈再,曲妍,何飞飞.预处理对河道底泥固化效果的影响[J].能源研究与信息,2019,35(2):69-75. |
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| 作者姓名： | 李玉祥 陈维芳 陈再 曲妍 何飞飞 |
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| 作者单位： | 上海理工大学环境与建筑学院 |
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| 基金项目： | 上海市自然科学基金资助项目（14ZR1428900）；上海市科委能力建设项目（13230502300）；教育部留学回国人员科研启动基金资助项目 |
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| 摘 要： | 为了通过预处理改变底泥的理化性质,增加底泥固化后抗压强度,实现底泥的资源化利用,比较了3种底泥预处理方法(Fenton氧化、热处理、淋洗)对底泥中有机质的质量分数、重金属总质量、重金属形态分布,特别是对底泥固化后抗压强度的影响。结果表明:固化后抗压强度与底泥中有机质的质量分数直接相关;可降低底泥中有机质的质量分数的预处理方法(Fenton氧化、热处理)对提高底泥固化后抗压强度效果较好,底泥固化后抗压强度高达2.7 MPa;鼠李糖脂淋洗虽然能够有效去除底泥中的重金属,但是淋洗剂中的有机物反而使底泥中有机质的质量分数增加,对固化不利。因此,Fenton氧化和热处理均可用作提高底泥固化强度的预处理方法,且固化后试样重金属浸出毒性低,对环境影响小。
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| 关 键 词： | 河道底泥 预处理 固化 抗压强度 |
| 收稿时间： | 2017/4/22 0:00:00 |
Effects of the pretreatments on the river sediment solidification |
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| LI Yuxiang,CHEN Weifang,CHEN Zai,QU Yan and HE Feifei.Effects of the pretreatments on the river sediment solidification[J].Energy Research and Information,2019,35(2):69-75. |
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| Authors: | LI Yuxiang CHEN Weifang CHEN Zai QU Yan and HE Feifei |
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| Affiliation: | School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China,School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China,School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China,School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China and School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | Due to its physical and chemical property changes through pre-treatments, effects of pre-treatments including Fenton oxidation, heat treatment and washing on organic content, heavy metal content, heavy metal speciation and compressive strength after solidification were compared in this paper with the purpose of increasing the compressive strength of solidified sediment, which could realize the sediment reuse. The results showed that compressive strength of the solidified sediment was closely related to its organic content. Pretreatments, such as Fenton oxidation and heat treatment, which could reduce the organic content had the best effect on improving compressive strength. The highest compressive strength of 2.7 MPa could be reached. By comparison, rhamnolipid washing had effect on heavy metal removal. However, it resulted in the rising of organic content and thus had adverse effect on the solidification. Therefore, Fenton oxidation and heat treatment were recommended as the pretreatment to further increase the compressive strength. In addition, the solidified samples with low heavy metal leaching had less impact on the environment. |
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| Keywords: | river sediment pretreatment solidification compressive strength |
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