改性竹炭对南极磷虾酶解液的除氟效果  

Defluoridation from Antarctic Krill Hydrolyzate Using Iron-Impregnated Bamboo Charcoal

作　　者：杨晓丹[1] 张静茹 李燕[1] YA NG Xiaodan, ZHA NG Jinru, LI Yan(College of Food Science and Technology, Shanghai Ocean University, Shanghai 201603, Chin)

机构地区：[1]上海海洋大学食品学院,上海201603

出　　处：《食品与生物技术学报》2018年第7期707-713,共7页Journal of Food Science and Biotechnology

基　　金：国家863计划项目(2011AA090801)

摘　　要：利用竹炭为原料,得到除氟效果较好的除氟剂,用以去除南极磷虾酶解液中的氟。用Fe2(SO4)3溶液作为竹炭的改性剂,使得竹炭载铁,对比竹炭改性前后的除氟效果,并研究了竹炭颗粒度、p H值、时间、温度及吸附剂投入量5个参数对吸附效果的影响,得到最佳除氟条件。通过对吸附等温模型、热力学参数和吸附动力学模型的分析,结合参数以及模型,分析了改性竹炭的除氟原理。结果表明,改性竹炭除氟效果远高于未改性的竹炭,改性竹炭在南极磷虾酶解液中的最佳吸附条件为:吸附剂投放量0.01 g/m L,吸附温度40℃,吸附时间1 h,吸附剂颗粒度40~60目,除氟率达到73%,酶解液氟离子质量浓度由18.7 mg/L降至5.1 mg/L,氟质量浓度在安全食用范围内。High-fluorine is the potential restriction factor in application of Antarctic Krill. The study explores the potential of iron-impregnated bamboo charcoal for the removal of fluoride from Antarctic Krill hydrolyzate. Batch experiments were conducted to establish the optimal conditions like particle size,pH ,contact time,temperature and dose of the adsorbent. The optimal conditions were as follows：absorbent additive dosage 0.01 g/mL,contact time 60 min,temperature 40 ℃ , particle size 40-60 mesh, initial pH. Fluoride level of hydrolyzate can be reduced to 5.1 mg/L under the optimum condition when initial fluoride concentration of 18.7 mg/L is employed. Removal efficiency was promoted to 73% using modified bamboo charcoal , which is better than unmodified one.

关 键 词：竹炭 南极磷虾 除氟 载铁改性 

分 类 号：TQ424[化学工程]