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中国精品科技期刊2020
朱唯唯, 罗立新, 王玉. 壳聚糖包埋魔芋组合物对Pb(Ⅱ)和胆固醇的吸附研究[J]. 食品工业科技, 2015, (23): 125-129. DOI: 10.13386/j.issn1002-0306.2015.23.017
引用本文: 朱唯唯, 罗立新, 王玉. 壳聚糖包埋魔芋组合物对Pb(Ⅱ)和胆固醇的吸附研究[J]. 食品工业科技, 2015, (23): 125-129. DOI: 10.13386/j.issn1002-0306.2015.23.017
ZHU Wei-wei, LUO Li-xin, WANG Yu. Adsorption property of Pb( Ⅱ) and cholesterol by chitosan coated konjac glucomannan[J]. Science and Technology of Food Industry, 2015, (23): 125-129. DOI: 10.13386/j.issn1002-0306.2015.23.017
Citation: ZHU Wei-wei, LUO Li-xin, WANG Yu. Adsorption property of Pb( Ⅱ) and cholesterol by chitosan coated konjac glucomannan[J]. Science and Technology of Food Industry, 2015, (23): 125-129. DOI: 10.13386/j.issn1002-0306.2015.23.017

壳聚糖包埋魔芋组合物对Pb(Ⅱ)和胆固醇的吸附研究

Adsorption property of Pb( Ⅱ) and cholesterol by chitosan coated konjac glucomannan

  • 摘要: 将魔芋葡甘聚糖颗粒在常温下溶于壳聚糖稀酸溶液制成的包埋液,制备能够保持魔芋助消化及降低血中胆固醇浓度等优良特性的新品种魔芋,并用红外光谱仪进行表征。通过静态吸附的方法系统探讨了吸附质初始浓度、吸附剂用量、吸附时间对Pb2+和胆固醇吸附效果的影响,并采用吸附动力学模型和等温吸附方程进行拟合。结果表明:产品同时具有魔芋葡甘聚糖和壳聚糖的功能基团;在37℃下,Pb2+和胆固醇的最大去除率分别为95.2%和48.7%;吸附过程符合准二级动力学方程和Freundlich吸附等温模型。说明壳聚糖包埋魔芋组合物可有效地吸附Pb2+和胆固醇,且属于不均匀表面的吸附。 

     

    Abstract: A new konjac product with a chitosan coating was prepared by konjac glucomannan particles and a solution of chitosan in aqueous acetic acid at room temperature.This product can keep excellent characteristics of konjac such as helping digestion and reducing the concentration of cholesterol in the blood. The properties were characterized by FT- IR. Adsorption performance for Pb2+and cholesterol was evaluated in solutions systematically.Batch experiments were conducted as a function of initial concentration,adsorbent dosage and contact time.The kinetic data were analyzed by the pseudo- first- order,pseudo- second- order kinetics. Also the equilibrium data were examined with the Langmuir and Freundlich isotherm models. The results showed that the new product was characterized with functional groups of konjac glucomannan and chitosan. Adsorption at 37 ℃resulted in the maximum removal rate of 95.2% and 48.7% for Pb2+and cholesterol,respectively.Kinetics fitted with the pseudo- second- order model. Besides,Freundlich model conformed to the equilibrium data. The results suggested the product can be an effective adsorbent for Pb2+and cholesterol,and the adsorption reaction occurred on an uneven surface.

     

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