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《中国化学工程学报(英文版)》 2013-03
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Removal of Lead Ions from Ginseng Ethanol Extracts by Dynamic Adsorption in a Fixed-bed Column

LIU Wenfang, ZHAO Zhiping and GUO Yiqiong School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China  
The removal of lead from ginseng ethanol extracts by a fixed-bed column filled with an adsorbent bearing amine and carboxyl groups was investigated. The Pb2+ content was determined by inductively coupled plasma mass spectrometry. When the flowrate increased from 0.12 to 0.34 ml·min-1 , the column exhibited a marked increase in percentage of lead removal from 54.9% to 92.3%. Further increase in the flowrate did not bring evident changes to the lead removal, whereas an increase in the temperature could reinforce adsorption further, suggesting that the adsorption process was controlled by external film diffusion below the flowrate of 0.34 ml·min-1 , and by the intraparticle pore diffusion of lead ions when the flowrate exceeded it. A low remaining lead amount in extracts such as 0.11 mg·kg-1 (extracts powder) was achieved. The adsorbents also adsorbed effective constituents to some extent. But 88% of constituents adsorbed were taken off using a 70% ethanol aqueous solution.
【Fund】: Supported by the National Natural Science Foundation of China (20976012 20806009);; the Specialized Research Fund for the Doctoral Program of Higher Education (20070007055 20091101110035)
【CateGory Index】: R284.1
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 CHEN Jun-Hui 1,2,XIE Ming-Yong 1*,WANG Feng-Mei 3,WANG Xiao-Ru 3,4,Frank S.C. LEE 4(1.Key Laboratory of Food Science of Ministry of Education,Nanchang University,Nanchang 330047,China;2.Faculty of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266003,China;3.Key Laboratory of Modern Analytical Science of Ministry of Education,Xiamen University,Xiamen 361005,China;4. Qingdao Key Laboratory of Analytical Technology Development and Standardization of Chinese Medicines,First Institute Oceanography of SOA,Qingdao 266061,China);Element Transference Characteristics and Element Speciation Analysis in Panax quinquefolium. L by RP-HPLC-ICP-MS[J];高等学校化学学报;2006-10
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1 WU Xue-qing;CAI Jia-bai;LI Shun-xing;College of Chemistry and Environment, Minnan Normal University;;A New Interpretation of Speciation Analysis and Bioavailability of Trace Elements in Traditional Chinese Medicine[J];闽南师范大学学报(自然科学版);2015-01
2 ZHOU Xue-zhong1,XIE Hua-lin2,(1.College of Materials and Chemical Engineering,Hunan Institute of Technology,Hengyang 421002,China;2.College of Chemistry and Chemical Engineering,Yangtze Normal University,Chongqing 408100,China);ICP-MS Determination of Trace Elements in American Ginseng[J];食品科学;2013-10
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