Cadmium removal from water using thiolactic acid-modified titanium dioxide nanoparticles

Skubal, Laura R.; Meshkov, N.K.; Rajh, Tijana; Thurnauer, Marion C.

doi:10.1016/s1010-6030(02)00069-2

Cited by 91 publications

(27 citation statements)

References 10 publications

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“…This shows that the reaction fol- -100 500 91 2 TiSi-10 10 -90 500 126 3 TiSi-20 20 -80 500 138 4 TiZr-10 -10 90 500 105 5 TiZr-20 -20 80 500 96 lows a first-order kinetics. Obtained result is in well agreement with the reported result of Hg reduction on modified TiO 2 [14].…”

Section: Resultssupporting

confidence: 91%

“…In comparison to that work on photocatalytic metal removal has been less extensive. However, photoreduction of several metal ions like Pb [6], Cr [7], Zn [8], Cd [9,10], Cu [11], Ni [12], Ag [13], Hg [14], Au [15] and Se [16] were studied in presence of UV light. It is reported that the photocatalytic activity is strongly dependent on the electrooptical properties of the photocatalyst, defects removal, particle size and specific surface area [17].…”

Section: Introductionmentioning

confidence: 99%

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Effect of UV and visible light on photocatalytic reduction of lead and cadmium over titania based binary oxide materials

Mishra

Hait

Aman

et al. 2007

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effect of UV and visible light on photocatalytic reduction of lead and cadmium over titania based binary oxide materials

Mishra

Hait

Aman

et al. 2007

Journal of Colloid and Interface Science

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“…In this context, while titanium dioxide (TiO 2 ) ENPs have been used as an ingredient in domestic and cosmetic products, its use in waste water treatment schemes, which includes oxidative degradation of biomolecules and catalytic reduction of metallic ions highlights a potential source of environmental contamination (Cho et al 2004;Ogino et al 2007;Skubal et al 2002). TiO 2 ENPs also possess properties that promise to improve the efficiency of sunscreens (Brezova et al 2005;Carp et al 2004;Serpone et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Genotoxic and cytotoxic potential of titanium dioxide (TiO2) nanoparticles on fish cells in vitro

2008

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Intrinsic genotoxic and cytotoxic potential of titanium dioxide (TiO2) engineered nanoparticles (ENPs) were evaluated in a metabolically competent, established fish cell line derived from rainbow trout (Oncorhyncus mykiss) gonadal tissue (i.e. RTG-2 cells). Prior to evaluation of the toxic potential, mean size of the ENPs was determined using transmission electron microscopy (TEM). As a prerequisite, an extensive characterisation of the ENPs was carried out following sonication which enabled the synthesis of an efficient dosing strategy for the cells in which exposure in phosphate buffered saline (PBS) gave an optimal agglomeration effects compared to distilled water (H2O) and minimal essential media (MEM). Interaction of the ENPs with cells under scanning electron microscope (SEM) was also studied. The genotoxic and cytotoxic potential of the ENPs were determined either alone or in combination with ultraviolet radiation (i.e. UVA). Whilst genotoxic potential was determined by evaluating DNA strand breaks using single cell gel electrophoresis (SCGE) or the comet assay and induction of cytogenetic damage using cytokinesis-blocked micronucleus (MN) assay, cytotoxicity was determined by measuring the retention of supra vital stain, neutral red, by the lysosomes using the neutral red retention (NRR) assay. In addition, while performing the comet assay, lesion specific bacterial endonuclease, formamidopyrimidine DNA glycosylase (Fpg), which recognises oxidised purine bases, was used to determine oxidative DNA damage. The results suggested that the highest concentration of the ENPs (i.e. 50 microg ml(-1)) did not produce elevations in DNA damage over 4 h (comet assay), 24 h (modified comet assay) or 48 h (MN assay) exposures in the absence of UVA irradiation, although there was a significant reduction in lysosomal integrity over 24 h exposure (NRR assay). The induction of MN did not show any enhanced levels as a function of ENP concentration. A significantly increased level of strand breaks was observed in combination with UVA (3 kJ m(-2)). In general, the NRR assay suggested elevated levels of cytotoxicity when the UVA exposure was carried out with MEM compared to PBS, although both showed an increase when in combination with the highest concentration of ENPs (i.e. 50 microg ml(-1)). Overall, the study emphasises the need for adoption of an holistic approach while evaluating the potential toxic effects of ENPs in which appropriate measures should be taken to avoid agglomeration or aggregation to facilitate efficient cellular uptake to evaluate potential biological responses.

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“…have been reported for removal of heavy metals from contaminated water bodies. Promising methods such as photochemical reduction/deposition of heavy metals have attracted the attention of many researchers [1,2]. Among all these methods, adsorption continues to be an effective and widely used process due to its simplicity and easy operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of some bivalent heavy metal ions from aqueous solutions by manganese nodule leached residues

Das

Jana

2006

Journal of Colloid and Interface Science

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Cadmium removal from water using thiolactic acid-modified titanium dioxide nanoparticles

Cited by 91 publications

References 10 publications

Effect of UV and visible light on photocatalytic reduction of lead and cadmium over titania based binary oxide materials

Effect of UV and visible light on photocatalytic reduction of lead and cadmium over titania based binary oxide materials

Genotoxic and cytotoxic potential of titanium dioxide (TiO2) nanoparticles on fish cells in vitro

Adsorption of some bivalent heavy metal ions from aqueous solutions by manganese nodule leached residues

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