DEVELOPMENT OF NEW LIGNIN DERIVATIVES AS SOIL CONDITIONING AGENTS BY RADICAL SULFONATION AND ALKALINE-OXYGEN TREATMENT

Citation
K. Saito et al., DEVELOPMENT OF NEW LIGNIN DERIVATIVES AS SOIL CONDITIONING AGENTS BY RADICAL SULFONATION AND ALKALINE-OXYGEN TREATMENT, Mokuzai Gakkaishi, 43(8), 1997, pp. 669-677
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Materials Science, Paper & Wood
Journal title
ISSN journal
0021-4795
Volume
43
Issue
8
Year of publication
1997
Pages
669 - 677
Database
ISI
SICI code
0021-4795(1997)43:8<669:DONLDA>2.0.ZU;2-E
Abstract
It is well known that aluminium ions eluted into soil solutions under acidic conditions are toxic for plants. Such soil containing excess al uminium ions are distributed in the tropics of South-East Asia, and pr event cultivation and reforestation. To develop anew soil conditioning agent from lignin, kraft lignin was modified by radical sulfonation a nd alkaline-oxygen treatment, and its ability as a soil conditioning a gent was examined. Lignins modified by radical sulfonation showed sequ estering abilities for aluminium ions in the range of pH 4.0-5.6, and the growth rate of radish roots measured by neutron radiography and th e line intersection method indicated that the modified lignin was able to remove the toxic effect of aluminium ions and even to improve the growth rate of the radish roots.