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Studies on application of wood based water holding substances for afforestation in arid zone i. water absorption and water holding capacity of buna based water holding substance



Studies on application of wood based water holding substances for afforestation in arid zone i. water absorption and water holding capacity of buna based water holding substance



Sand Dune Research 38(1): 41-49



A wood based water holding substance was produced utilizing buna as a raw material mixed with synthetic high molecular weight water adsorbent polymer. Effects of the raw material's coarseness, the amount of added polymer, and the grain size of the resulting water holding substance on water absorption and water holding capacity were investigated. The following results were obtained. 1) Water absorption by the wood based water holding substance increased almost proportionally with the added amount of polymer. Further, the amount of water absorbed by the material based on wood chips was larger than that prepared from wood powder. A similar trend in absorption was observed for the mixture of the substance with sand. 2) On water retention, the water holding percentage was also higher when the relative amount of water absorbent polymer was increased. A good water retention resulted when wood chips rather than wood powder were utilized. Again, a satisfactory water retention result was obtained for the coarsely grained water holding substance. However, when mixed with sand, the one with lesser amount of polymer exhibited higher water retention. 3) On the investigation of water absorption based on cyclic water absorption-oven drying repetition (10 cycles) test, the results were as follows. When wood chips were used in the raw material, a big change was observed in the amount of the water absorbed as the amount of added polymer was increased.

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