脱色工艺中不同脱色剂对油茶籽油中苯并芘脱除效果的影响

研究了在优化的脱色条件下,脱色剂对油茶籽油中苯并芘的脱除作用。结果表明:活性炭对油茶籽油中苯并芘脱除效果显著,加入油质量3%的活性炭可以完全脱除样品中的苯并芘(苯并芘含量为7.12μg/kg);活性白土基本不具备脱除苯并芘的能力,但在活性炭中加入活性白土后,活性白土优先脱除油茶籽油中色素等杂质,为活性炭对苯并芘的脱除保留了吸附能力,使得活性炭对苯并芘的脱除效率提高,在3%活性白土的存在下,加入油质量0.3%的活性炭即可达到单独使用3%活性炭对苯并芘的脱除量,相当于将脱除苯并芘的能力提高10倍左右。

Removing benzopyrene from oil -tea camellia seed oil by different decoloring agents in bleaching process

The removal of benzopyrene in oil-tea camellia seed oil by different decoloring agents during bleaching process was investigated.The results demonstrated that the effect of active carbon on the removal of benzopyrene in oil-tea camellia seed oil was significant.The benzopyrene(7.12 μg/kg) in the sample oil could be removed thoroughly with active carbon dosage of 3%(based on the mass of the oil).The active clay did not have the ability of removing benzopyrene,but when mixing with active carbon,the active clay could increase the adsorptive capacity of active carbon,because the active clay was prior to remove the impurities in oil-tea camellia seed oil such as pigment.In the presence of 3% active clay in the oil,the active carbon could remove benzopyrene completely with active carbon dosage of 0.3%(based on the mass of the oil),and the removal efficiency of active carbon could improve nearly 10 times.