Microcystin-LR adsorption by powdered activated carbon

Donati, C.; Drikas, Mary; Hayes, Rob; Newcombe, Gayle

doi:10.1016/0043-1354(94)90245-3

Cited by 159 publications

(105 citation statements)

References 10 publications

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“…Although the adsorption ability of MCs by wood-based powdered ACs was slightly higher than those of clays tested (Fig. 3), which was also lower than those of some reports (Donati et al, 1994;Mohamed et al, 1999;Pendleton et al, 2001). In order to keep the same condition, the adsorbents were all directly used without treatment prior to our experiment, which might cause the differences in the absorbed amounts of MCs.…”

Section: Adsorption Of Mcs By Cnts Acs and Claysmentioning

confidence: 86%

“…3). Lahti and Hiisvirta (1989) indicated that the concentrations of MCs hardly changed when small doses of powdered ACs were added, but Donati et al (1994) reported that the removal of MCs was a direct proportionality of ACs mesopore volume. Furthermore the decrease of pH was found to cause the increase in the adsorption of MCs by ACs (Pendleton et al, 2001), which is in accordance with the properties that the solubility of MC-LR in water was decrease with the increase of pH (De Maagd et al, 1999).…”

Section: Adsorption Of Mcs By Cnts Acs and Claysmentioning

confidence: 99%

“…Pendleton et al (2001) found that the wood-based activated carbons (ACs) that contain both micropores and mesopores adsorbed more MC-LR than the coconut-based ACs that contain micropores only, however surface and solution chemistry played minor roles in the adsorption process. Donati et al (1994) also investigated the adsorption by several different powdered ACs and suggested that the removal of MC-LR was directly proportional to the mesopore volume (diameters between 2 and 50 nm) of adsorbents. Mohamed et al (1999) demonstrated that the powdered ACs were more efficient than granular ACs in removing MCs, and MCs from extracts of Microcystis aeruginosa were adsorbed significantly better than those from Oscillatoria tenuis.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of microcystins by carbon nanotubes

et al. 2006

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The production of cyanobacterial toxins microcystins (MCs) by cyanobacterial bloom which may promote the growth of tumor in human liver is a growing environmental problem worldwide. In this paper, the adsorption of MC-RR and LR, which were extracted from cyanobacterial cells in Dianchi Lake in China, by carbon nanotubes (CNTs), wood-based activated carbon (ACs) and clays were investigated. Compared with ACs and clay materials of sepiolite, kaolinite and talc tested, CNTs were found to have a strong ability in the adsorption of MCs. At the concentrations of 21.5 mg l À1 MC-RR and 9.6 mg l À1 MC-LR in 50 mmol phosphate buffer solution (pH 7.0), the adsorption amounts of MCs by CNTs with the range of outside diameter from 2 to 10 nm were 14.8 and 5.9 mg g À1 , which were about four times higher than those by other adsorbents tested. It was shown that with the decrease of CNTs outside diameters from 60 to 2 nm, the adsorption amount of MCs was apparently increased, however the size of CNTs particles formed in solution declined. This result implies that the size of CNTs tube pore that is fit for the molecular dimension of MCs plays a dominant role. Furthermore the specific surface area of CNTs was also found to be a factor in the adsorption of MCs. The results suggested that the selection of suitable size of CNTs as a kind of adsorbent is very important in the efficient eliminating MCs from drinking water in future.

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Section: Adsorption Of Mcs By Cnts Acs and Claysmentioning

confidence: 86%

Section: Adsorption Of Mcs By Cnts Acs and Claysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of microcystins by carbon nanotubes

et al. 2006

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“…Todavia, como consequência do aporte de nutrientes -de forma pontual e/ou difusa -, das altas temperaturas e do período diário de insolação, (Donati et al, 1994;Newcombe & Nicholson, 2002;Jurczak et al, 2005;Huang et al, 2007;Viana-Veronezi et al, 2009;Ho et al, 2011;Guerra et al, 2015).…”

Section: Introductionunclassified

Hierarquização da eficiência de remoção de cianotoxinas por meio de adsorção em carvão ativado granular

Silva

Oliveira

Ceballos

et al. 2017

Eng. Sanit. Ambient.

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“…More detailed studies with activated carbon show that both PAC as well as granular-activated carbon (GAC) effectively and quickly (contact times of 30 min are sufficient) eliminate cyanotoxins from water (99)(100)(101). In the case of PAC, dosing is an important parameter (10 pg/L toxin: > 200 mg/PAC/L), whereas when using GAC, the choice of the carbon source is important (coal, wood > peat, coconut), probably due to the different pore sizes relative to the size of the microcystin molecule (102). A major concern when using activated carbon in water treatment plants is the formation of a biofilm, which can significantly impair the ability of the filter to adsorb toxins; biodegradation by the biofilm does not seem to occur (99,103,104).…”

Section: Cylindrospermopsinmentioning

confidence: 99%

Cyanobacterial toxins: removal during drinking water treatment, and human risk assessment.

Hitzfeld

Höger

Dietrich

2000

Environ Health Perspect

257

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Cyanobacteria (blue-green algae) produce toxins that may present a hazard for drinking water safety. These toxins (microcystins, nodularins, saxitoxins, anatoxin-a, anatoxin-a(s), cylindrospermopsin) are structurally diverse and their effects range from liver damage, including liver cancer, to neurotoxicity. The occurrence of cyanobacteria and their toxins in water bodies used for the production of drinking water poses a technical challenge for water utility managers. With respect to their removal in water treatment procedures, of the more than 60 microcystin congeners, microcystin-LR (L, L-leucine; R, L-arginine) is the best studied cyanobacterial toxin, whereas information for the other toxins is largely lacking. In response to the growing concern about nonlethal acute and chronic effects of microcystins, the World Health Organization has recently set a new provisional guideline value for microcystin-LR of 1.0 pg/L drinking water. This will lead to further efforts by water suppliers to develop effective treatment procedures to remove these toxins. Of the water treatment procedures discussed in this review, chlorination, possibly micro-/ultrafiltration, but especially ozonation are the most effective in destroying cyanobacteria and in removing microcystins. However, these treatments may not be sufficient during bloom situations or when a high organic load is present, and toxin levels should therefore be monitored during the water treatment process. In order to perform an adequate human risk assessment of microcystin exposure via drinking water, the issue of water treatment byproducts will have to be addressed in the future.

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Microcystin-LR adsorption by powdered activated carbon

Cited by 159 publications

References 10 publications

Adsorption of microcystins by carbon nanotubes

Adsorption of microcystins by carbon nanotubes

Hierarquização da eficiência de remoção de cianotoxinas por meio de adsorção em carvão ativado granular

Cyanobacterial toxins: removal during drinking water treatment, and human risk assessment.

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