植物油中铅和砷的消减工艺研究

Study on the reduction technology of lead and arsenic in vegetale oil

以自制含铅和砷的大豆油、菜籽油为研究对象,基于脱胶、碱炼和脱色对其进行消减。以铅和砷含量及其脱除率为主要指标,确定铅和砷的最佳消减工艺,并对消减后2种油的氧化稳定性进行分析。结果表明:最佳消减工艺为以脱酸油质量为基准,碱液浓度8°Bé、碱液添加量0.7%、活性白土添加量2.0%。在此条件下,2种油的铅和砷含量均符合相关标准要求,且脱除率均较高。氧化稳定性试验表明,经最佳工艺消减后,2种油的氧化稳定性均提升。

The self-made soybean oil and rapeseed oil containing lead and arsenic were studied,and reduced based on degumming,alkali refining,and decolorization.The optimal reduction process for lead and arsenic was determined based on their content and removal rate,and the oxidation stability of the two types of oil after reduction was analyzed.The results showed that the optimal reduction process was based on the mass of the deacidification oil,with alkali concentration of 8°Bé,alkali addition of 0.7%,and active clay addition of 2.0%.Under these conditions,the lead and arsenic contents of both oils met the relevant standard requirements,and the removal rates were relatively high.The oxidation stability test showed that after the optimal process reduction,the oxidation stability of both oils was improved.