Application of thermal lens microscopy (TLM) for measurement of Cr(VI) traces in wastewater

In this work, we demonstrate for the first time that Thermal Lens Microscopy technique (TLM) can be applied to monitor the dynamics of a photocatalytic process in-situ. The photocatalytic reduction of hexavalent chromium -Cr(VI)- in aqueous solution using CdS and irradiated with visible light is mon...

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Published in:Journal of environmental management 2019-02, Vol.232, p.305-309
Main Authors: Hernández-Carabalí, L.A., Cedeño, E., Mantilla, A., Alvarado, S., Cabrera, H., Mansanares, A.M., Calderón, A., Marín, E.
Format: Article
Language:English
Subjects:
CdS photocatalyst
Cr(VI)
Photocatalysis
Photoreduction
Photothermal
Thermal lens microscopy
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cited_by cdi_FETCH-LOGICAL-c365t-4ad0357f7e695e5cf3b6b329f30dd1bd084979fadbec41c00b58ec3546dc0c333
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container_end_page 309
container_issue
container_start_page 305
container_title Journal of environmental management
container_volume 232
creator Hernández-Carabalí, L.A.
Cedeño, E.
Mantilla, A.
Alvarado, S.
Cabrera, H.
Mansanares, A.M.
Calderón, A.
Marín, E.
description In this work, we demonstrate for the first time that Thermal Lens Microscopy technique (TLM) can be applied to monitor the dynamics of a photocatalytic process in-situ. The photocatalytic reduction of hexavalent chromium -Cr(VI)- in aqueous solution using CdS and irradiated with visible light is monitored by TLM. Since the values of Cr(VI) concentration obtained after the photocatalytic process were close to those imposed by the international regulations for drinking water, the use of TLM allowed its measurement with a better reliability than with UV spectroscopy, usually used in this kind of analysis. [Display omitted] •Thermal Lens Microscopy technique is effective to measure Cr(VI) traces in water.•The Limit of Detection of TLM is 3 orders of magnitude lower than that of UV–Vis.•The LOD of TLM allows to measure Cr(VI) within standards of drinking water.•TLM can be used for measure Cr(VI) traces in water during a photocatalytic process.
doi_str_mv 10.1016/j.jenvman.2018.11.044
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subjects CdS photocatalyst
Cr(VI)
Photocatalysis
Photoreduction
Photothermal
Thermal lens microscopy
title Application of thermal lens microscopy (TLM) for measurement of Cr(VI) traces in wastewater
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