Development of a new analytical approach based on cellulose membrane and chelator for differentiation of labile and inert metal species in aquatic systems

Rosa, André Henrique; Bellin, Iramaia Corrêa; Goveia, Danielle; Oliveira, Luciana Camargo de; Lourenço, Roberto Wágner; Filho, Newton Luiz Dias; Burba, P.

doi:10.1016/j.aca.2006.03.046

Cited by 8 publications

(3 citation statements)

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“…A high ratio indicates a structure with low aromaticity, and a low ratio indicates a structure with high aromaticity. According to the literature, ratios of less than 4 indicate a greater presence of condensed aromatic structures, whereas values greater than 4 indicate the presence of few condensed aromatic structures [26]. The decrease in the E 4 /E 6 ratio is directly linked to an increase in molar mass and the condensation of aromatic carbons, an increase in the humification of aromatic structures and greater conjugation of double and single bonds, given that aromaticity is inversely related to the number of aliphatic groups [29,30].…”

Section: Uv-vis Spectroscopymentioning

confidence: 98%

“…The in situ studies were carried out using the procedure described by Rosa et al [26]. The masses used for the in situ application were 200, 300 and 500 mg of humin, and the contact time varied from 30 to 480 min.…”

Section: Application Of Humin In Metal Retention In Situmentioning

confidence: 99%

“…The experiments were carried out in triplicate at the same point in the lagoon complex, with a point distant from the effects of man-made activities used for reference. Metal elution was carried out using HNO 3 1 mol L À1 [26].…”

Section: Application Of Humin In Metal Retention In Situmentioning

confidence: 99%

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Interactions between humin and potentially toxic metals: Prospects for its utilization as an environmental repair agent

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Section: Uv-vis Spectroscopymentioning

confidence: 98%

Section: Application Of Humin In Metal Retention In Situmentioning

confidence: 99%

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Interactions between humin and potentially toxic metals: Prospects for its utilization as an environmental repair agent

Jacundino

Santos

et al. 2015

Journal of Environmental Chemical Engineering

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New analytical procedure based on a cellulose bag and ionic exchanger with p-aminobenzoic acid groups for differentiation of labile and inert metal species in aquatic systems

et al. 2006

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A new procedure was developed for the in situ characterization of the lability of metal species in aquatic systems by using a system equipped with a diffusion membrane and cellulose organomodified with p-aminobenzoic acid groups (DM-Cell-PAB). To this end, the DM-Cell-PAB system was prepared by adding cellulose organomodified with p-aminobenzoic acid groups (Cell-PAB) to pre-purified cellulose bags. After the DM-Cell-PAB system was sealed, it was examined in the laboratory to evaluate the influence of complexation time, mass of exchanger, pH, metal ions (Cu, Cd, Fe, Mn, and Ni), and concentration of organic matter on the relative lability of metal species. It was found that the pH and kinetics strongly influence the process of metal complexation by the DM-Cell-PAB system. At all pH levels, Cd, Mn, and Ni showed lower complexation with Cell-PAB resin than Cu and Fe metals. Note that relative lability of metals complexed to aquatic humic substances (AHS) in the presence of Cell-PAB resin showed the following order: Cu approximately or = Fe>>Ni>Mn=Cd. The results presented here also indicate that increasing the AHS concentration decreases the lability of metal species by shifting the equilibrium to AHS-metal complexes. Our results indicate that the system under study offers an interesting alternative that can be applied to in situ experiments for differentiation of labile and inert metal species in aquatic systems.

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In situ application of a cellulose bag and an ion exchanger for differentiation of labile and inert metal species in aquatic systems

et al. 2007

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This work involved the development and application of a new analytical procedure for in-situ characterization of the lability of metal species in aquatic systems by using a system equipped with a diffusion membrane and cellulose organomodified with p-aminobenzoic acid groups (DM-Cell-PAB). To this end, the DM-Cell-PAB system was prepared by adding cellulose organomodified with p-aminobenzoic acid groups (Cell-PAB) to pre-purified cellulose bags. After the DM-Cell-PAB system was sealed, it was examined in the laboratory. The in-situ application involved immersing the DM-Cell-PAB system in two different rivers, enabling us to study the relative lability of metal species (Cu, Cd, Fe, Mn, and Ni) as a function of time and quantity of exchanger. The procedure is simple and opens up a new perspective for understanding environmental phenomena relating to the complexation, transport, stability, and lability of metal species in aquatic systems rich in organic matter.

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Development of a new analytical approach based on cellulose membrane and chelator for differentiation of labile and inert metal species in aquatic systems

Cited by 8 publications

References 8 publications

Interactions between humin and potentially toxic metals: Prospects for its utilization as an environmental repair agent

Interactions between humin and potentially toxic metals: Prospects for its utilization as an environmental repair agent

New analytical procedure based on a cellulose bag and ionic exchanger with p-aminobenzoic acid groups for differentiation of labile and inert metal species in aquatic systems

In situ application of a cellulose bag and an ion exchanger for differentiation of labile and inert metal species in aquatic systems

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