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

DOI：10.3969/j.issn.1673-1689.2018.07.006

中文关键词: 竹炭 南极磷虾 除氟 载铁改性

英文关键词: bamboo charcoal,Antarctic Krill,defluoridation,iron-impregnation

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中文摘要:

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、pH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/mL，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。

英文摘要:

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.

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