豆渣膳食纤维吸附重金属的研究  

Binding of heavy metals to dietary fibre from soybean residue

作　　者：涂宗财[1,2,3] 胡月明[1,2] 陈丽莉[1,2] 王辉[1,2] 阮传英[1,2] 

机构地区：[1]南昌大学食品科学与技术国家重点实验室,江西南昌330047 [2]南昌大学生物质转化教育部工程研究中心,江西南昌330047 [3]江西师范大学,江西南昌330022

出　　处：《食品与机械》2013年第1期85-87,共3页Food and Machinery

基　　金：国家自然科学基金项目(编号:20976078)

摘　　要：通过体外试验模拟人体胃和肠道的pH环境,分别评价经过乳酸菌发酵、动态高压微射流处理过的豆渣膳食纤维吸附3种重金属离子(Hg2+、Cd2+和Pb2+)的能力。结果表明,豆渣膳食纤维对3种重金属离子都有一定的吸附作用,吸附能力Pb2+>Hg2+>Cd2+,且在20min内可达到吸附平衡,肠道环境更有利于吸附。乳酸菌发酵和动态高压微射流处理均增强了豆渣膳食纤维的吸附作用。Dietary fibre from soybean residue was evaluated for bind ing capacity for three heavy metals, Hg, Cd, Pb in vitro experiments under the physiological conditions （37 ℃, pH 2 and pH 7）. The re suits showed that soybean residue dietary fibre had binding capacity for three heavy metals, and the capacity decreased in the following order： Pb^2＋〉 Hg ^2＋〉Cd^2＋. The binding process completed in 20 min and the binding capacity under the small intestine environ ment was far stronger than the gastric environment. The fermented dietary fibre and dynamic high pressure microfluidization-treated di etary fibre showed higher binding capacities for three heavy metal cations.

关 键 词：豆渣 膳食纤维 电感耦合等离子体原子发射光谱 重金属 吸附 

分 类 号：TS201.2[轻工技术与工程—食品科学]