|Table of Contents|

Study on Absorption of Zn2+ by Saponfied Lettuce Leaf(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年12期
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Study on Absorption of Zn2+ by Saponfied Lettuce Leaf
Author(s):
CHEN Li; SI Hui; YANG Huan; CHEN Lin; JIN Feng; SUN Song
Department of Life Science,Yuncheng University,Yuncheng,Shanxi 044000
Keywords:
lettuce leaf; Zn2+; quadratic regression orthogonal rotation combination of design; SEM; FTIR
PACS:
S 644.6
DOI:
-
Abstract:
Taking saponfied lettuce leaf as materials,using quadratic regression orthogonal rotating combination design,initial concentration of Zn2+ solution,saponfied lettuce leaf addition,Zn2+solution pH,temperature and time,five factors were optimized,the optimum process of saponfied lettuce leaf absorption Zn2+were studied.The results showed that the maximum absorption rate was 76.14% when 60 mg/L of Zn2+,saponfied lettuce leaf addition 0.5 g,pH 8,40℃,and 1h.Through the experiment the optimum absorption rate was 75.95%,consistent with the predicted value;compared with the absorption effect of activated carbon,cellulose,the absorption of leaf lettuce residue was the best;and the Freundlich absorption isotherm and the second-order kinetic equation could better describe the absorption of lettuce leaf residue ofZn2+;By SEM and FTIR,it showed that lettuce leaf residue surface had loose and porous pore,and -C≡C effectively helped the absorption of Zn2+.

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Last Update: 2014-08-01