2007
DOI: 10.1590/s0103-50532007000400023
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Interaction between humic substances and metallic ions: a selectivity study of humic substances and their possible therapeutic application

Abstract: A capacidade de complexação de substâncias húmicas extraídas de amostras de turfa coletadas na região do Rio Mogi em Ribeirão Preto, SP, Brasil, foi determinada utilizando Al(III), Pb(II), Cr(VI) e Cd(II). A seguinte ordem de afinidade foi observada: Cr(VI)< Cd(II) Show more

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Cited by 26 publications
(16 citation statements)
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References 19 publications
(19 reference statements)
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“…These results are comparable to those obtained previously in studies of the complexation of HS, extracted from different matrices, with potentially toxic inorganic species, where the kinetics of complexation was around 30 min. 15,26 During titration with endocrine disruptors, saturation of the strongest AHS binding sites occurs first, followed by saturation of the weaker sites. Figure 3 shows a typical titration of AHS with a standard solution of bisphenol A, using the tangential flow ultrafiltration procedure.…”
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confidence: 99%
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“…These results are comparable to those obtained previously in studies of the complexation of HS, extracted from different matrices, with potentially toxic inorganic species, where the kinetics of complexation was around 30 min. 15,26 During titration with endocrine disruptors, saturation of the strongest AHS binding sites occurs first, followed by saturation of the weaker sites. Figure 3 shows a typical titration of AHS with a standard solution of bisphenol A, using the tangential flow ultrafiltration procedure.…”
mentioning
confidence: 99%
“…The curve shows a slope change, and the complexation capacity was obtained from the intersection of the two linear sections. 26,27 No comparative results have been reported in the literature concerning the complexation capacities of AHS for endocrine disruptors. Table 3 presents the complexation capacities of AHS for some organic and inorganic substances, including the results of the present study.…”
mentioning
confidence: 99%
“…19,20 Transferiram-se 70,0 g de lodo para erlenmeyer, adicionou-se solução de NaOH 0,1 mol L -1 na razão 1:10 (m v -1 ) e deixou-se a mistura sob agitação mecânica em Jartest com rotação de 100 rpm por 4 h, sob atmosfera de nitrogênio. Centrifugou-se a mistura a 18000 x g por 30 min e separou-se o sobrenadante colocando-o para secar em estufa com renovação de ar.…”
Section: Extração De Substâncias Húmicas Das Amostras De Letasunclassified
“…20 As titulações foram feitas em volume de 200 mL de solução de SH 100 mg L -1 , ajustou-se o pH em 5,0 com solução de NaOH 0,1 mol L -1 e força iônica em 1,0 com solução de NaNO 3 0,1 mol L -1…”
Section: Determinação Da Capacidade Complexante Das Sh Extraídas De Aunclassified
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