A simple and low cost dual-wavelength β-correction spectrophotometric determination and speciation of mercury(II) in water using chromogenic reagent 4-(2-thiazolylazo) resorcinol

Al-Bagawi, Amal H.; Ahmad, Waqas; Saigl, Z.M.; Alwael, H.; Al-Harbi, Eman A.; El-Shahawi, M.S.

doi:10.1016/j.saa.2017.06.044

Cited by 9 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, a great deal of attention has been paid to the determination of trace and ultratrace concentrations of mercury by accurate, low-cost and reliable methods without any complicated sample preparation [9]. The most common techniques in analysis of natural water samples are stripping voltammetry [10], gas chromatography [11], spectrophotometry [12,13], X-ray fluorescence spectrometry [14], and dual-wavelength β-correction spectrophotometric determination and speciation of mercury(II) ions in water using chromogenic reagent 4-(2-thiazolylazo) resorcinol [15].…”

Section: Introductionmentioning

confidence: 99%

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Al-Bagawi¹,

Ahmad²,

Alwael³

et al. 2019

Chemometrics and Data Analysis in Chromatography

View full text Add to dashboard Cite

A simple method has been developed for quantitative retention of traces of mercury(II) ions from aqueous media using polyurethane foams (PUFs) loaded with 4-(2-thiazolylazo) resorcinol (TAR). The kinetics and thermodynamics of the sorption of mercury(II) ions onto PUFs were studied. The sorption of mercury(II) ions onto PUF follows a first-order rate equation with k = 0.176 ± 0.010 min −1. The negative values of ΔH and ΔS may be interpreted as the exothermic chemisorption process and indicative of a faster chemisorption onto the active sites of the sorbent. The sorption data followed Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherm models. The D-R parameters β, K DR and E were 0.329 mol 2 kJ −2 , 0.001 μmol g −1 and 1.23 ± 0.07 kJ/mol for the TAR-loaded PUFs, respectively. An acceptable retention and recovery (99.6 ± 1.1%) of mercury(II) ions in water at ≤10 ppb by the TAR-treated PUFs packed columns were achieved. A retention mechanism, involving absorption related to "solvent extraction" and an "added component" for surface adsorption, was suggested for the retention of mercury(II) ions by the used solid phase extractor. The performance of TAR-immobilized PUFs packed column in terms of the number (N), the height equivalent to a theoretical plate (HETP), the breakthrough and critical capacities of mercury(II) ion uptake by the sorbent packed column were found to be 50.0 ± 1.0, 1.01 ± 0.02 mm, 8.75 and 13.75 mg/g, respectively, at 5 mL/min flow rate.

show abstract

Section: Introductionmentioning

confidence: 99%

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Al-Bagawi¹,

Ahmad²,

Alwael³

et al. 2019

Chemometrics and Data Analysis in Chromatography

View full text Add to dashboard Cite

show abstract

“…According to conditions obtained in this work, it can be said that the analytical sensitivity of the method developed was comparable to the method developed by Al-Bagawi et al (2017), who used the complexing agent 4-(2-thiazolylazo) resorcinol (TAR) and corrected the absorbance complexing using β-correction technique. The detection and quantification limits obtained by these authors were, respectively, 0.024 μg mL -1 and 0.081 μg mL -1 .…”

Section: Standardization and Validation Of Methods For Mercury Quanti...mentioning

confidence: 58%

Determination of mercury concentration by a new spectrophotometric method and evaluation of bacterial diversity in river water samples from Brazil

et al. 2022

View full text Add to dashboard Cite

One of the main micropollutants reported in river water is mercury (Hg), a heavy metal toxic to human and animal organisms that can promote bacterial resistance to antimicrobials used in the clinical practice. Having done this in consideration, monitoring the concentration of Hg in the river is an important indicator of physical-chemical and microbiological quality of water. Thus, in this study the Hg concentration was determined using a new spectrophotometric method in river water samples recovered from Minas Gerais, Brazil. Furthermore, the diversity and antimicrobial resistance of Gram-positive and Gram-negative bacteria isolated from these samples were also reported. A new ultraviolet-visible spectrophotometric method was validated and applied to quantify Hg in water and revealed high concentrations in the samples (0.13–0.35 μg·mL−1), above the limits established by Brazilian standards (0.002 μg·mL−1). Gram-negative bacteria (mainly Escherichia coli) were recovered in greater proportion (88.4%) from water samples with high mercury concentration and showed resistance to tetracycline and ampicillin. Our results highlighted that E. coli resistant to carbapenems, which are latest generation beta-lactams, were detected. In conclusion, the Hg levels are considerably high in river waters in Brazil, and these mercury-rich water sources are important reservoirs of multi-drug resistant bacteria.

show abstract

“…In addition, skilled operators, high cost, long time for running per sample, etc., have been other disadvantages. To overcome these problems, attempts have been made to develop analytical methods based on the kinetics and catalysis, 5,18,[35][36][37][38] formation of colored complexes of Hg(II) with other compounds, 39,40 etc. We have also been interested in developing analytical methods for the determination as well as removal of various analytes and toxic species of environmental, biological and medicinal interest.…”

Section: R-sh + Hg 2+ / (R-s) 2 Hg + 2h +mentioning

confidence: 99%

A novel catalytic kinetic method for the determination of mercury(ii) in water samples

et al. 2020

View full text Add to dashboard Cite

show abstract

A simple and low cost dual-wavelength β-correction spectrophotometric determination and speciation of mercury(II) in water using chromogenic reagent 4-(2-thiazolylazo) resorcinol

Cited by 9 publications

References 39 publications

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Determination of mercury concentration by a new spectrophotometric method and evaluation of bacterial diversity in river water samples from Brazil

A novel catalytic kinetic method for the determination of mercury(ii) in water samples

Contact Info

Product

Resources

About