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| 不同脱色剂对油脂中叶绿素脱除的影响 |
| Influence of different decolorants on chlorophyll removal from oils |
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| DOI： |
| 中文关键词: 叶绿素脱除 脱色剂 吸附脱色 介孔面积 大孔孔容 |
| 英文关键词:chlorophyll removal decolorant decolorizing by adsorption mesoporous area macroporous pore volume |
| 基金项目:“十四五”国家重点研发计划重点专项(2021YFD2100302) |
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| 中文摘要: |
| 为筛选高效脱除叶绿素的脱色剂，为油脂工业生产中脱色剂的精准使用提供参考，以大豆油和菜籽油为例，采用不同种类脱色剂进行脱色，分析脱色剂参数（比表面积、介孔面积、孔道结构）对叶绿素脱除效果的影响。结果表明：3种主要的矿物类脱色剂对叶绿素的脱除能力强弱为活性白土>凹凸棒土>膨润土，活性白土对叶绿素的脱除效果与其比表面积或介孔面积呈正相关关系；活性炭对叶绿素的脱除效果与其比表面积没有明确的相关性，但与其介孔面积呈正相关关系，当活性炭介孔面积从3.8 m2/g提升至275.4 m2/g时，叶绿素脱除率提升了140.8%；单以介孔面积无法明确判定不同种类脱色剂如活性炭与活性白土对叶绿素的脱除效果，应结合脱色剂的大孔孔容进行判定。综上，对于相同的脱色剂，可以用介孔面积判定脱色剂对叶绿素脱除能力的强弱，而对于不同种类的脱色剂，介孔面积和大孔孔容是影响脱色剂对叶绿素脱除效果的关键因素。 |
| 英文摘要: |
| In order to screen decolorants with high efficiency for chlorophyll removal and provide reference for the precise use of decolorants in oils industrial production, soybean oil and rapeseed oil were used as examples to be decolorized with different kinds of decolorants, and the effects of decolorant parameters ( specific surface area, mesoporous area and pore structure ) on chlorophyll removal were analyzed. The results showed that the removal ability of three main mineral decolorants on chlorophyll was active clay>attapulgite>bentonite, and the removal effect of chlorophyll as positively correlated with the specific surface area or mesoporous area of active clay. There was no clear correlation between the removal effect of chlorophyll by activated carbon and its specific surface area, but it was positively correlated with its mesoporous area. When the mesoporous area of activated carbon increased from 3.8 m2/g to 275.4 m2/g, the removal rate of chlorophyll increased by 1408%. The removal effect of chlorophyll with different kinds of decolorants such as activated carbon and active clay could not be clearly determined by mesoporous area alone, but should be determined by the macroporous pore volume of decolorants. In summary, for the same decolorants, the mesoporous area can be used to determine the strength of the decolorant′s ability to remove chlorophyll. For different kinds of decolorants, the mesoporous area and macroporous pore volume are the key factors affecting the decolorant′s effect on chlorophyll removal. |
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