dc.contributor.author |
Al-Jabari, Maher |
|
dc.contributor.author |
Sawalha, Hassan |
|
dc.contributor.author |
Al-Qasrawi, Bayan |
|
dc.contributor.author |
Al-Osily, Malak |
|
dc.contributor.author |
Banat, Shatha |
|
dc.date.accessioned |
2023-05-30T07:26:58Z |
|
dc.date.available |
2023-05-30T07:26:58Z |
|
dc.date.issued |
2022 |
|
dc.identifier.citation |
6. Maher Al-Jabari, Hassan Sawalha, Bayan Al-Qasrawi, Malak Al-Osily, Shatha Banat. “Stability of UV-visible spectrophotometric measurements for investigating the adsorption of hexavalent chromium from wastewater” Desalination and Water Treatment, 275 (2022), 284-290. |
en_US |
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/8881 |
|
dc.description.abstract |
Hexavalent chromium Cr(VI) is a carcinogenic and mutagenic heavy metal. It can be encountered in various industrial wastewater, the characterization of which and the evaluation of its
removal efficiency require a successful quantification technique. There is no sufficient work in the
literature investigating the time-stability of UV-vis spectra of Cr(VI) solutions. This paper fills a
knowledge gab in Cr(VI) solution/color stability and the applicability of UV-spectrophotometry
in Cr(VI) adsorption studies. The presented experimental results indicate that the absorbance of
Cr(VI) solution at the previously reported maximum wavelength of 371 nm, is not repeatable.
The addition of 1,5-diphanelcarbazide improves the UV-vis spectra and enhances its stability
for spectrophotometric analysis within about 1 h. After that period, the stability decreases with
time. The instability of these spectrophotometric measurements at longer times (i.e., after 1 h) was
not reported in the previous studies or in the ISO standard method for determining the Cr(VI).
This paper also applies this technique for monitoring and evaluating the adsorption treatment of
Cr(VI)-contaminated wastewater (e.g., from electroplating) by solid waste micro-particles from
stone cutting industry. The limestone particles are good adsorbents for the treatment of wastewaters contaminated with Cr(VI). A percentage removal of about 40% can achieved for adsorbent
dosage of 1 g (particles)/100 ml (solution). |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Desalination Publications |
en_US |
dc.subject |
UV-visible spectrophotometry; Hexavalent chromium; Wavelength; Adsorption |
en_US |
dc.title |
Stability of UV-visible spectrophotometric measurements for investigating the adsorption of hexavalent chromium from wastewater |
en_US |
dc.type |
Article |
en_US |