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Position: Home > Articles > Adsorption of Pb(Ⅱ) by Formaldehyde Treated Naval Orange Peel FOOD SCIENCE 2012,33 (19) 57-61

甲醛改性脐橙皮对重金属Pb(Ⅱ)的吸附

作  者:
赵华;陈爱华;张耀海;焦必宁
单  位:
西南大学食品科学学院;国家柑橘工程技术中心;遵义市产品质量检验检测院;中国农业科学院柑桔研究所
关键词:
脐橙皮;甲醛改性;Pb(Ⅱ)溶液;生物吸附
摘  要:
以生物废料脐橙皮为原料,在一定的条件下,与甲醛反应,制取生物吸附剂,考察Pb(Ⅱ)初始质量浓度、吸附时间、溶液pH值对生物吸附剂吸附性能的影响。结果表明:在常温条件下,向15mL、pH 5.0、质量浓度为150mg/L的Pb(Ⅱ)溶液中加入25mg改性脐橙皮,恒温振荡2h,改性脐橙皮吸附剂对溶液中Pb(Ⅱ)的去除率达99.85%。改性脐橙皮吸附剂对Pb(Ⅱ)的吸附在2h左右达到平衡且符合二级动力学方程,生物吸附作用遵循Langmuir等温吸附方程,改性脐橙皮吸附剂的最大吸附容量达到185.19mg/g,最适pH值为4.0~5.5。
译  名:
Adsorption of Pb(Ⅱ) by Formaldehyde Treated Naval Orange Peel
作  者:
ZHAO Hua 1,2,3,CHEN Ai-hua 2,4,ZHANG Yao-hai 2,4,JIAO Bi-ning 1,2,4,(1.College of Food Science,Southwest University,Chongqing 400716,China;2.Citrus Research Institute,Chinese Academy of Agricultural Sciences,Chongqing 400712,China;3.Zunyi Inspection and Testing Institute of Product Quality,Zunyi 563000,China 4.National Citrus Engineering Research Center,Chongqing 400712,China)
关键词:
naval peel;formaldehyde modification;Pb(Ⅱ) solution;biosorption
摘  要:
Under controlled conditions,a bio-adsorbent was prepared by reacting naval orange peel with formaldehyde.The effects of initial Pb(Ⅱ) concentration,adsorption time and solution pH on the adsorption efficiency of the bio-adsorbent for Pb(Ⅱ) were investigated.The results indicated that adding 25 mg of formaldehyde treated naval orange peel to 15 mL of 150 mg/L Pb(Ⅱ) solution at pH 5.0 and then shaking the mixture for 2 h at constant ambient temperature resulted in a Pb(Ⅱ) removal rate of 99.85%.The adsorption of Pb(Ⅱ) by the bio-adsorbent reached equilibrium at approximately 2 h and obeyed second-order kinetics.The biosorption process followed Langmuir isotherm equation.The maximum adsorption capacity of the modified naval orange peel was 185.19 mg/g,and the optimum adsorption pH was 4.0—5.5.

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