摘要
研究毛建茶多酚的提取以及毛建对重金属Ni^(2+)和Cu^(2+)的吸附能力。结果发现,70%甲醇作溶剂时提取率最大,微波提取优于水浴萃取。在茶饮条件下,毛建对重金属Ni^(2+)和Cu^(2+)都有吸附。毛建对Ni^(2+)和Cu^(2+)的吸附是一个吸热过程,高温有利于其吸附,它对两种金属离子的吸附都符合兰缪尔等温式,属于单层吸附,最大吸附量分别为50.25、57.47mg/g。
The extraction methods of tea polyphenols from Dracocephalum rupestre and heavy metal adsorbtion capacity were investigated. The results showed that the extraction rate was maximum when 70 % methanol was as solvent and microwave method was better than water bathing. Dracocephalum rupestre could adsorb heavy metals nickel and copper ions under the condition of simulating tea drinking condition. The adsorbtion to Ni2＋ and Cu2＋ was endothermic and elevated temperature was advantaged. The adsorbtion isotherms of both ions were fitted to a Langmuir equation, which means the adsorption is monodermic. The maximum number of adsorbed metal ions was given： 50.25 mg/g for Ni2＋ and 57.47 mg/g for Cu2＋.
出处
《食品研究与开发》
CAS
北大核心
2016年第10期42-46,共5页
Food Research and Development
基金
忻州师范学院学生课外科技创新项目(2014)
忻州师范学院化学化工创新实践基地项目
忻州师范学院第四批专项课题(ZT201403)
山西省科技厅自然基金(2014011014-2)
关键词
毛建
微波提取
重金属吸附
dracocephalum rupestre
microwave extraction
absorption to heavy metal ions
