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

SAITO K NAKANISHI TM MATSUBAYASHI M MESHITSUKA G

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

16

INGLESE

Article

Materials Science, Paper & Wood

Mokuzai Gakkaishi → ACNP

0021-4795

43

8

1997

669 - 677

ISI

0021-4795(1997)43:8<669:DONLDA>2.0.ZU;2-E

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.