New System for the Spectrophotometric Determination of Arsenic in Water

Lin, Gen‐Min; Wang, Yanhong; Li, Guochen; Wang, Shicheng; Zhang, Hong; Li, Bo

doi:10.1109/cdciem.2011.199

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Long-term exposure to arsenic gives symptoms such as vomiting, abdominal pain, diarrhea, severe gastrointestinal irritation, gastrointestinal damage, cardiac damage and several types of cancer [3]. It can result in vascular diseases like black foot disease [4,5]. Arsenic can be found in both organic and inorganic forms, as trivalent arsenite (H 3 AsO 3 , HAsO 3 2− or H 2 AsO 3 − ) and pentavalent arsenate (H 3 AsO 4 , HAsO 4 2− , H 2 AsO 4 − or AsO 4 3− ), of which the first form, As(III) is more noxious than As(V) [6].…”

Section: Introductionmentioning

confidence: 99%

Calcium Alginate Beads with Entrapped Iron Oxide Magnetic Nanoparticles Functionalized with Methionine—A Versatile Adsorbent for Arsenic Removal

Lilhare¹,

Mathew²,

Singh³

et al. 2021

Nanomaterials

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A novel beads adsorbent, consisting of calcium alginate entrapped on magnetic nanoparticles functionalized with methionine (MFMNABs), was developed for effective elimination of arsenic from water. The material was characterized by FT-IR (Fourier Transform Infrared Spectroscopy), SEM (Scanning Electron Microscopic), XRD (X-ray Diffraction) and TEM (Transmission Electron Microscopy). The arsenic removal capacity of the material was studied by altering variables such as pH of the solution, contact time, adsorbent dose and adsorbate concentration. The maximal removal of As(III) was 99.56% under optimal conditions with an equilibrium time of 110 min and pH 7.0–7.5. The adsorption followed a second order kinetics and data best fitted the Langmuir isotherm with a correlation coefficient of R2 = 0.9890 and adsorption capacity (qm) of 6.6533 mg/g. The thermodynamic study showed entropy change (∆S) and enthalpy change (∆H) to be 34.32 J mol−1 K and 5.25 kJ mol−1, respectively. This study proved that it was feasible to treat an As(III) solution with MFMNABs. The synthesized adsorbent was cost-effective, environmentally friendly and versatile, compared to other adsorbents. The adsorption study was carried by low cost spectrophotometric method using N- bromosuccinimide and rhodamine-B developed in our laboratory.

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Section: Introductionmentioning

confidence: 99%

Calcium Alginate Beads with Entrapped Iron Oxide Magnetic Nanoparticles Functionalized with Methionine—A Versatile Adsorbent for Arsenic Removal

Lilhare¹,

Mathew²,

Singh³

et al. 2021

Nanomaterials

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Trace Level Arsenic Quantification through Methyl Red Bromination

Malingappa¹,

Kumar²

2012

AJAC

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A simple protocol has been developed for the quantification of trace level arsenic through methyl red bromination. The proposed method is based on the oxidation of arsenic(III) to arsenic(V) by the bromine and the residual bromine’s reaction with methyl red to form colorless bromo methyl red. As the concentration of arsenic increases, the bleaching of the dye decreases due to bromine consumption. Measuring the intensity of the unreacted methyl red at 515 nm forms the basis of arsenic quantification. The molar absorptivity of this method has been found to be 2.25 × 103 L/mol/cm. The method obeys Beer’s law in the concentration range 0 - 0.25 µg/mL. The Sandell sensitivity and the limit of detection (LOD) were found to be 0.03 µg/mL/cm2 and 0.03 µg/mL respectively. The relative standard deviation has been found to be 0.35% at 1.0 µg/mL. The reaction conditions have been optimized and the interference due to various common cations and anions were studied. The proposed method has been successfully applied to the determination of trace level arsenic in various environmental samples like water, soil and vegetable samples

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New System for the Spectrophotometric Determination of Arsenic in Water

Cited by 2 publications

References 15 publications

Calcium Alginate Beads with Entrapped Iron Oxide Magnetic Nanoparticles Functionalized with Methionine—A Versatile Adsorbent for Arsenic Removal

Calcium Alginate Beads with Entrapped Iron Oxide Magnetic Nanoparticles Functionalized with Methionine—A Versatile Adsorbent for Arsenic Removal

Trace Level Arsenic Quantification through Methyl Red Bromination

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