食品科学

• 工艺技术 • 上一篇    下一篇

响应面法优化鱿鱼墨黑色素吸附六价铬离子条件

韦荣编1,鲁婷婷2,王阳光2,宋 茹2,*   

  1. 1.浙江海洋学院海洋科学与技术学院,浙江 舟山 316022;2.浙江海洋学院食品与医药学院,浙江 舟山 316022
  • 出版日期:2014-10-25 发布日期:2014-11-07
  • 基金资助:

    国家自然科学基金青年科学基金项目(31301568);浙江省厅市会商项目(2013C02003);
    舟山市科技局项目(2013C41008);浙江海洋学院科研启动经费资助项目

Optimization of Removal of Hexavalent Chromium from Aqueous Solution by Adsorption onto Squid Ink Melanin Using Response Surface Methodology

WEI Rong-bian1, LU Ting-ting2, WANG Yang-guang2, SONG Ru2,*   

  1. 1. College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, China;
    2. College of Food Science and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
  • Online:2014-10-25 Published:2014-11-07

摘要:

以鱿鱼墨黑色素为吸附剂,在黑色素粉碎粒径90 目和质量浓度15 mg/mL条件下,进行六价铬离子Cr(Ⅵ)吸附条件优化研究,并探讨吸附机制。通过吸附温度、吸附时间和溶液pH值三因素三水平Box-Behnken响应面试验分析,确定鱿鱼墨黑色素吸附Cr(Ⅵ)最佳条件为吸附温度35 ℃、吸附时间90 min、溶液pH 5.2。在确定的最优吸附条件下,鱿鱼墨黑色素对总铬离子实际清除率达到64.86%。扫描电镜结果显示吸附Cr(Ⅵ)后鱿鱼墨黑色素的球形颗粒相互聚集形成大量聚合物,红外光谱分析揭示鱿鱼墨黑色素的羟基、氨基、酰胺键Ⅲ与铬离子吸附有关。

关键词: 鱿鱼墨, 黑色素, 六价铬, 脱除作用, 响应面分析, 扫描电镜, 红外光谱

Abstract:

In the present study, squid (Ommastrephes bartrami) melanin was employed to adsorb Cr(Ⅵ) in aqueous
solutions. Three adsorption conditions (temperature, time and pH) for Cr(Ⅵ) onto squid melanin powder with a granularity of
90 mesh at a concentration of 15 mg/mL were optimized by response surface methodology based on a Box-Behnken model.
The observed removal rate of total chromium ions was 64.86% under the optimal adsorption conditions: 35 ℃, 90 min
and pH 5.2. Scanning electron microscopy (SEM) demonstrated massive aggregation of the spherical granules of squid
melanin upon adsorption of Cr(Ⅵ). Fourier transform infrared (FT-IR) spectroscopy revealed that hydroxyl, amino and
amide groups were the potential binding sites for chromium ions.

Key words: squid ink, melanin, hexavalent chromium, removal activity, response surface methodology, scanning electron microscopy, Fourier transform infrared spectroscopy

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