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Fernando Barboza Egreja Filho ; José Domingos Fabris ; Wagner da Nova Mussel ; Roberto Ferreira Novais ;Revista Brasileira de Ciência do Solo 2007, 31 5

Autor: Fabiana Rodrigues Ribeiro

Fuente: http://www.redalyc.org/


Introducción



Revista Brasileira de Ciência do Solo ISSN: 0100-0683 revista@sbcs.org.br Sociedade Brasileira de Ciência do Solo Brasil Rodrigues Ribeiro, Fabiana; Barboza Egreja Filho, Fernando; Domingos Fabris, José; Nova Mussel, Wagner da; Ferreira Novais, Roberto POTENTIAL USE OF A CHEMICAL LEACHING REJECT FROM A KAOLIN INDUSTRY AS AGRICULTURAL FERTILIZER Revista Brasileira de Ciência do Solo, vol.
31, núm.
5, 2007, pp.
939-946 Sociedade Brasileira de Ciência do Solo Viçosa, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=180214062011 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative POTENTIAL USE OF A CHEMICAL LEACHING REJECT FROM A KAOLIN INDUSTRY. 939 POTENTIAL USE OF A CHEMICAL LEACHING REJECT FROM A KAOLIN INDUSTRY AS AGRICULTURAL FERTILIZER(1) Fabiana Rodrigues Ribeiro(2), Fernando Barboza Egreja Filho(3), José Domingos Fabris(3), Wagner da Nova Mussel(3) & Roberto Ferreira Novais(4) SUMMARY The industrial refining of kaolin involves the removal of iron oxides and hydroxides along with other impurities that cause discoloration of the final product and depreciate its commercial value, particularly undesirable if destined to the paper industry.
The chemical leaching in the industrial processing requires treatments with sodium hyposulfite, metallic zinc, or sulfuric and phosphoric acids, in order to reduce, dissolve and remove ferruginous compounds.
To mitigate the environmental impact, the acidic effluent from the leaching process must be neutralized, usually with calcium oxide.
The resulting solid residue contains phosphorous, zinc, and calcium, among other essential nutrients for plant growth, suggesting its use as a macro and micronutrient source.
Samples of such a solid industrial residue were used here to eva...





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