Internet Archive Scholar

Caracterização de amostras comerciais de vermicomposto de esterco bovino e avaliação da influência do pH e do tempo na adsorção de Co(II), Zn(II) and Cu(II)

João da Paixão Soares, Jovino Araújo de Souza, Éder Tadeu Gomes Cavalheiro
2004 Química Nova  

Preserved Fulltext

fulltext thumbnail
Web Archive Capture PDF (142.0 kB)
https://web.archive.org/web/20180726151651/http://www.scielo.br/pdf/qn/v27n1/18800.pdf

A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL. The file type is application/pdf.

II), Zn(II) and Cu(II) ADSORPTION. Some commercial samples of vermicompost from bovine manure (humus) were characterized by thermogravimetry with respect to humidity, organic matter and ash contents, the percentages of which range from 6.55 to 5.35%, 53.01 to 69.96% and 46.44 to 66,14%, respectively. The capacity of adsorption of Cu 2+ , Zn 2+ and Co 2+ ions by these samples has been evaluated as a function of pH and time. The contents of several metal ions in the original vermicompost samples
more » ... ave been determined by flame atomic absorption spectrometry after digestion in a microwave oven. The high nitrogen content suggests that the earthworms used in the maturation procedure lead to an efficient degradation of organic matter. The metal retention was affected by both pH and adsorption time. The results also show that adsorption follows the order Cu 2+ > Zn 2+ > Co 2+ .
doi:10.1590/s0100-40422004000100002 fatcat:tqkavhgkofdzlcscekn2awk67e
DOAJ SciELO
Citation

João da Paixão Soares, Jovino Araújo de Souza, Éder Tadeu Gomes Cavalheiro. "Caracterização de amostras comerciais de vermicomposto de esterco bovino e avaliação da influência do pH e do tempo na adsorção de Co(II), Zn(II) and Cu(II)." Química Nova 27.1 (2004) 5-9