Abstract

LOPEZ ROMERO, Marcela et al. Physicochemical properties of treated clinoptilolite with fertilizers to use as additive to the cultivation of Pleurotus ostreatus. Terra Latinoam [online]. 2010, vol.28, n.3, pp.247-254. ISSN 2395-8030.

The physicochemical properties of clinoptilolite zeolite from Tehuacan, Puebla, Mexico, were studied for its use as an additive in the substrate for cultivation of Pleurotus ostreatus mushrooms. These studies included X-ray diffraction, high resolution N₂ adsorption at 77.5 K and determination of the chemical composition. The clinoptilolite was crushed, grounded, and heated, and then subjected to a series of chemical treatments via solutions of CO(NH₂)₂ 0.123 M (N), KCl 0.230 M (K), Ca(H₂PO₄)₂ 0.079 M (P) and NH₄NO₃ + Ca(H₂PO₄)₂ + KCl 0.040 M (NPK) for 2 days. The X-ray diffraction patterns indicated that the crystalline structure of the clinoptilolite samples remained intact after treatment with the above solutions. The specific surface (As_B) using the BET method (Brunauer, Emmett, and Teller) resulted as follows: As_B: NPK > P > K > CLINA > N. Determination of the chemical composition of the zeolite demonstrated that the nutrients were deposited within the clinoptilolite structure.

Keywords : Pleurotus ostreatus; characterization; textural properties; natural zeolites.

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