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      DEVELOPMENT OF ACTIVATED CARBON FROM BAMBOO (Bambusa vulgaris) FOR PESTICIDE REMOVAL FROM AQUEOUS SOLUTIONS Translated title: DESENVOLVIMENTO DE CARVÃO ATIVADO A PARTIR DE BAMBU (Bambusa vulgaris) PARA REMOÇÃO DE PESTICIDAS DE SOLUÇÕES AQUOSAS

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          Abstract

          ABSTRACT Considering the water scarcity problems facing many countries, the need for water reuse can make activated carbon (AC) an essential product for modern society. In this context, to contribute with better activated carbons that could be used to serve in water treatment, this article discusses these materials production, using bamboo as raw material, and analyses their application effectiveness. The bamboo was collected, transformed into activated carbon, by simultaneous chemical and physical activations, and named H3PO4/H2OAC. The obtained material was characterized by its yield, apparent density, ash content, thermogravimetric analysis, surface area, methylene blue and iodine indexes, pH and point of zero charge analysis, scanning electron microscopy and Boehm titration method. The AC was used as adsorbent for removing the metribuzin, 2,4-dichlorophenoxyacetic acid and furadan pesticides. The H3PO4/H2OAC had a surface area of 1196.30 m².g-1 and the obtained adsorption capacity was elevated for furadan (868.98 mg.g-1), metribuzin (756.47 mg.g-1) and 2,4-dichlorophenoxyacetic acid (274.70 mg.g-1).

          Translated abstract

          RESUMO Considerando os problemas de escassez de água enfrentados por vários países, a necessidade de reuso das águas, pode fazer do carvão ativado (CA) um produto imprescindível à sociedade moderna. Neste contexto, para contribuir com a melhoria de carvões ativados que poderão servir ao tratamento de água, este artigo, discute a produção desses materiais, que teve o bambu, como matéria prima, e analisa a eficácia de sua aplicação. O bambu foi coletado, transformado em carvão ativado mediante ativação química e física simultânea e denominado CA H3PO4/H2O. O material obtido foi caracterizado pelo rendimento, densidade aparente, teor de cinzas, análise termogravimétrica, área superficial, índices de azul de metileno e de iodo, análise do pH e ponto de carga zero, microscopia eletrônica de varredura e método titulométrico de Boehm. O CA foi usado como adsorvente para a remoção dos pesticidas metribuzin, 2,4-diclorofenoxiacético e furadan. O CA H3PO4/H2O apresentou área superficial de 1196,30 m².g-1 e a capacidade de adsorção obtida foi elevada para o furadan (868,98 mg.g-1), metribuzin (756,47 mg.g-1) e 2,4-diclorofenoxiacético (274,70 mg.g-1).

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          Most cited references32

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          Some aspects of the surface chemistry of carbon blacks and other carbons

          H.P. Boehm (1994)
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            Waste materials for activated carbon preparation and its use in aqueous-phase treatment: a review.

            Commercial activated carbon is a preferred adsorbent for the removal of micropollutants from the aqueous phase; however, its widespread use is restricted due to high associated costs. To decrease treatment costs, attempts have been made to find inexpensive alternative activated carbon (AC) precursors, such as waste materials. Some reviews report the use of waste materials for the preparation of AC; however, these studies are restricted to either type of wastes, preparation procedures, or specific aqueous-phase applications. The present work reviews and evaluates literature dedicated both to the preparation of AC by recycling different types of waste materials and also to its application in various aqueous-phase treatments. It is clear that conventional (from agriculture and wood industry) and non-conventional (from municipal and industrial activities) wastes can be used to prepare AC, that can be applied in various aqueous treatment processes, namely to remove organic pollutants, dyes, volatile organic compounds, and heavy metals. Moreover, high surface areas can be obtained using either physical or chemical activation; however, combined treatments might enhance the surface properties of the adsorbent, therefore increasing its adsorption capacity. It is evident from the revision made that AC prepared from both conventional and non-conventional wastes might effectively compete with the commercial ones. This happens mostly when the activation procedures are optimized considering both the raw material used to produce the carbons and the contaminants to be removed.
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              Microwave-assisted activated carbon from cocoa shell as adsorbent for removal of sodium diclofenac and nimesulide from aqueous effluents

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                cerne
                CERNE
                CERNE
                UFLA - Universidade Federal de Lavras (Lavras, MG, Brazil )
                0104-7760
                2317-6342
                March 2017
                : 23
                : 1
                : 123-132
                Affiliations
                [2] João Pessoa orgnameUniversidade Federal da Paraíba Brazil
                [4] Lavras Minas Gerais orgnameUniversidade Federal de Lavras Brazil
                [3] Jerônimo Monteiro Espírito Santo orgnameUniversidade Federal do Espírito Santo Brazil
                [1] Seropédica Rio de Janeiro orgnameUniversidade Federal Rural do Rio de Janeiro Brazil
                Article
                S0104-77602017000100123
                10.1590/01047760201723012256
                694b6e42-acd7-4751-8403-ef12c0328385

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 03 March 2017
                : 25 October 2016
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 33, Pages: 10
                Product

                SciELO Brazil


                Forest products,adsorbent development,water treatment,Produtos Florestais,Desenvolvimento de adsorventes,Tratamento de água

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