Potential exposure and treatment efficiency of nanoparticles in water supplies based on wastewater reclamation

Kirkegaard, Peter; Hansen, Steffen Foss; Rygaard, Martin

doi:10.1039/c4en00192c

Cited by 21 publications

(8 citation statements)

References 40 publications

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“…Similarly for CeO 2 and Ag, particle concentrations of 0.1 ng/L and 1.9 ng/L, respectively, were calculated in tap water (Yang & Westerhoff 2014). Kirkegaard et al (2015) used a mass flow analysis to model ENM fate and treatment in two typical potable reuse systems for reclaimed wastewater (advanced membrane treatment and bank infiltration) and found that ENMs may be present in tap water in the ng/L to μg/L range under a worst‐case scenario. More research is needed to elucidate removal efficiencies of ENMs during various treatment stages and conditions, particularly as more robust detection methods become available and as ENM types and uses evolve.…”

Section: Behavior Of Enms In Dwtpsmentioning

confidence: 99%

Implications of Engineered Nanomaterials in Drinking Water Sources

et al. 2016

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Section: Behavior Of Enms In Dwtpsmentioning

confidence: 99%

Implications of Engineered Nanomaterials in Drinking Water Sources

et al. 2016

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“…Several methods such as phytoremediation, coagulation and flocculation, membrane filtration, and adsorption have been assessed to find suitable methods for removing metal-containing NPs from water and wastewater [20][21][22][23][24][25][26]. Because of the drawbacks of other methods including fouling in membrane filtration and high volume of sludge in coagulation and flocculation process, the adsorption process has been reported as the most efficient and economical method [27].…”

Section: Introductionmentioning

confidence: 99%

Fibrous adsorbent derived from sulfonation of cotton waste: application for removal of cadmium sulfide nanoparticles from aquatic media

et al. 2019

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In the present research, the performance of the cellulose sulfate microfibers (CSMFs) was investigated for the removal of cadmium sulfide nanoparticles (CdS NPs). At first, cotton waste was sulfonated by chlorosulfonic acid. The high sulfur content of the CSMFs (6.54%) and the absorbance bands appeared at 610 cm −1 (symmetric stretching vibrations) and 1205 and 1180 cm −1 (asymmetric stretching vibrations) in the FT-IR spectrum of CSMFs confirmed the successful modification of cotton microfibers. Optimizing the adsorption process was achieved using the response surface methodology. The impacts of the initial concentration of CdS NPs, contact time, total dissolved solids (TDS), and adsorbent concentration on the removal efficiency were assessed. The highest removal efficiency (about 100%) was obtained under optimum conditions. By increasing the TDS, the removal efficiency decreased slightly. University of Tehran, Radke-Prausnitz, and Redlich-Peterson models exhibited low error values. The high maximum adsorption capacity of 5533 mg g −1 was due to the high content of anionic surface groups. The kinetics data were consistent with the Elovich, intraparticle diffusion, and pseudo-second-order models. The rate constant of the pseudo-second-order model decreased by decreasing the concentration of CdS NPs. The adsorbent recovery decreased about 10% after four cycles of regeneration.

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“…Another important property is dissolution potential, or the potential to release soluble metal species as free ions or metal complexes. The useful properties of metal‐based ENPs mean that they are widely produced and incorporated into consumer products and industrial applications , and they are consequently increasingly being released into human‐made and natural aquatic systems.…”

Section: Introductionmentioning

confidence: 99%

Interactions of metal‐based engineered nanoparticles with aquatic higher plants: A review of the state of current knowledge

Thwala

Klaine

Musee

2016

Enviro Toxic and Chemistry

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The rising potential for the release of engineered nanoparticles (ENPs) into aquatic environments requires evaluation of risks to protect ecological health. The present review examines knowledge pertaining to the interactions of metal-based ENPs with aquatic higher plants, identifies information gaps, and raises considerations for future research to advance knowledge on the subject. The discussion focuses on ENPs' bioaccessibility; uptake, adsorption, translocation, and bioaccumulation; and toxicity effects on aquatic higher plants. An information deficit surrounds the uptake of ENPs and associated dynamics, because the influence of ENP characteristics and water quality conditions has not been well documented. Dissolution appears to be a key mechanism driving bioaccumulation of ENPs, whereas nanoparticulates often adsorb to plant surfaces with minimal internalization. However, few reports document the internalization of ENPs by plants; thus, the role of nanoparticulates' internalization in bioaccumulation and toxicity remains unclear, requiring further investigation. The toxicities of metal-based ENPs mainly have been associated with dissolution as a predominant mechanism, although nano toxicity has also been reported. To advance knowledge in this domain, future investigations need to integrate the influence of ENP characteristics and water physicochemical parameters, as their interplay determines ENP bioaccessibility and influences their risk to health of aquatic higher plants. Furthermore, harmonization of test protocols is recommended for fast tracking the generation of comparable data.

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Potential exposure and treatment efficiency of nanoparticles in water supplies based on wastewater reclamation

Abstract: We present current knowledge on nanoparticle fate in wastewater reclamation systems for potable reuse.

Cited by 21 publications

References 40 publications

Implications of Engineered Nanomaterials in Drinking Water Sources

Implications of Engineered Nanomaterials in Drinking Water Sources

Fibrous adsorbent derived from sulfonation of cotton waste: application for removal of cadmium sulfide nanoparticles from aquatic media

Interactions of metal‐based engineered nanoparticles with aquatic higher plants: A review of the state of current knowledge

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