A brief abstract of the research work not more than 200 words in length should be typed here. Must include a statement of relevance, the main objective, the scope of work to be presented, and most significant findings.  Do not include figures, tables or illustrations in this section. The conference will accept papers in English, Portuguese and Spanish. If the papers is written in a language different than English, a translation of the abstract and the keywords must be included after the abstract.Keywords: Natural zeolites, heavy metals, contamination, remediation, adsorption.