Synthesis of calcium peroxide nanoparticles as an innovative reagent for in situ chemical oxidation
Synthesis of calcium peroxide nanoparticles as an innovative reagent for in situ chemical oxidation
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DOI：
10.1016/j.jhazmat.2011.06.060
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发表时间：
2011-09-15
影响因子：
13.6
通讯作者：
Dashti, R.
中科院分区：
文献类型：
--
作者：
Khodaveisi, J.;Banejad, H.;Dashti, R.
化学氧化是最近出现的许多不同的场地修复方法之一，作为传统技术的替代方法。本研究认为过氧化钙是土壤和地下水中污染物生物降解的合适选择，但过氧化钙与污染物的氧化反应速度较慢。通过增大比表面积制备纳米级过氧化钙，可以加快反应速度，解决这一问题。我们开发了一种简单的表面改性技术，以避免过氧化钙纳米粒子的不可逆团聚。该技术是基于水解-沉淀过程，使用氯化钙作为前体。聚乙二醇200（PEG 200）用作表面改性剂。通过XRD和TEM等表征技术对CaO 2进行了表征和研究。结果表明，该方法可用于合成纳米级的新试剂，提高原位化学氧化的质量。通过TEM图像的尺寸测定表明过氧化钙纳米颗粒的尺寸约为15-25 nm。(C)2011 Elsevier B. V.保留所有权利。
Chemical oxidation is one of the many different methods of site remediation that has emerged lately as an alternative method to traditional techniques. According to this research calcium peroxide is suitable choice for contaminant biodegradation in soil and ground water but speed of oxidation reaction between calcium peroxide and contaminant is slow. Synthesis of calcium peroxide in nano size by increased ratio of surface to volume can increase the speed of reaction and solve the problem. We have developed a simple surface modification technique to avoid irreversible agglomeration of calcium peroxide nanoparticles. The technique is based on hydrolysis-precipitation procedure, using CaCl2 as a precursor. Polyethylene glycol 200 (PEG200) is used as a surface modifier. CaO2 was identified and studied by characterization techniques, including XRD and TEM. The results indicate the ability of this method for synthesis of new reagent in nano size and improve quality of in situ chemical oxidation. Size determination by TEM image indicates the size of calcium peroxide nanoparticles approximately 15-25 nm. (C) 2011 Elsevier B.V. All rights reserved.