Formation of a complex with aluminum by ozone-treated kraft lignins and their low molecular weight fragments
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The formation of a complex with aluminum by low molecular weight compounds and saponified ozone-treated kraft lignins was evaluated based on the decrease in pH of their solutions on the addition of 0.1 M AlCl3. Decreases in pH were observed with the solutions containing compounds having adjacent carboxyl groups (oxalic acid), carboxyl/alcoholic hydroxyl groups (glycolic acid), carboxyl/formyl groups (glyoxylic acid), and phenolic hydroxyl groups (protocatechuic acid) on the addition of 0.1 M AlCl3. The malonic and phthalic acids, having two carboxyl groups, were also effective. These results show that the compounds were effective in forming complexes with aluminum. This finding corresponds to the fact that aluminum toxicity is reduced by formation of a complex with aluminum, except in phthalic acid. The chemical structures stated above in ozone-treated kraft lignins contribute, at least partly, to the complex with aluminum. The pH of solutions containing saponified ozone-treated kraft lignins and alkaline-treated kraft lignin decreased more than that without modified kraft lignins on the addition of 0.1 M AlCl3, showing that they were effective in forming a complex with aluminum. The high molecular weight part of saponified ozone-treated kraft lignin was effective in forming a complex with aluminum and in reducing its toxicity.
Key wordsAluminum Complex Lignin Aluminum toxicity Ozone
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- 2.Aimi R, Murakami T (1964) Cell-physiological studies on the effect of aluminum on the growth of crop plants (in Japanese). Bull Nat Inst Agric Sci D 11:331–396Google Scholar
- 8.Foy CD (1984) Physiological effects of hydrogen, aluminum, and manganese toxicities in acid soil In: Adams F (ed) Soil acidity and liming. Agronomy Monograph no. 12, 2nd edn. ASA-CSSA-SSSA, Madison, WI, pp 57–97Google Scholar
- 14.Hue NV, Graddock GR, Adams F (1986) Effect of organic acids on aluminum toxicity in subsoils. Soil Sci Soc Am J 50:28–34Google Scholar
- 15.Katsumata K, Meshitsuka G (2002) Modified kraft lignin and its use for soil preservation In: Hu TQ (ed) Chemical modification, properties and usage of lignin. Kluwer, New York, pp 151–165Google Scholar
- 17.Saito K, Nakanishi MT, Matsubayashi M, Meshitsuka G (1997) Development of new lignin derivatives as soil conditioning agents by radical sulfonation and alkaline-oxygen treatment. Mokuzai Gakkaishi 43:669–677Google Scholar
- 23.Sarkanen KV, Islam A, Anderson CD (1992) Ozonation. In: Lin SY, Dence CW (eds) Methods in lignin chemistry. Springer-Verlag, Berlin, pp 387–406Google Scholar
- 26.Vance GF, Stevenson FJ, Sikora FJ (1996) Environmental chemistry of aluminum-organic complexes. In: Sposito G (ed) The environmental chemistry of aluminum, 2nd edn. Lewis, Boca Raton, pp 169–220Google Scholar
- 30.Martell AE, Calvin M (1952) Chemistry of the metal chelate compounds. Prentice-Hall, Englewood Cliffs, NJGoogle Scholar
- 31.Miller JN, Miller JC (1988) Statistics and chemometrics for analytical chemistry, 2th edn. Ellis Horwood, Chichester, UKGoogle Scholar
- 33.Ofei-Manu P, Wagatsuma T, Ishikawa S, Tawaraya K (2001) The plasma membrane strength of the root-tip cells and root phenolic compounds are correlated with Al tolerance in several common woody plants. Soil Sci Plant Nutr 47:359–375Google Scholar