Cobalt Poisoning: A Comprehensive Review of the Literature

Sheikh, Irfan

doi:10.21767/2471-9641.100017

Cited by 16 publications

(11 citation statements)

References 22 publications

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“…e contents of the flask which included Co(II) of desired concentration and given mass of DNL was stirred on a heating plate at different time intervals. e influence of contact time was studied at three initial Co(II) concentrations (10, 100, and 500 mg/L), pH (3)(4)(5)(6)(7)(8), DNL mass (0.05-0.4), and temperature (25-60°C). After predetermined intervals, the solution was filtered using Whatman filter paper No 1, and the equilibrium concentration of Co(II) remaining in solution determined using a UV/visible spectrophotometer (spectro 23RS, labo med.inc) at 400 nm (predetermined) by complexing with concentrated aqueous ammonia.…”

Section: Adsorptionmentioning

confidence: 99%

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One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves

Tsamo

Paltahe

Fotio

et al. 2019

International Journal of Chemical Engineering

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Water pollution by heavy metals like Co(II) is particularly of concern because of their persistence in the environment, toxicity, and ability to bioaccumulate in organisms. In this study, the influence of contact time at three initial concentration, pH, adsorbent dose, temperature, and kinetics, thermodynamics, and one-, two-, and three-parameter isotherm modeling of the adsorption of Co(II) on neem leaves (DNL) was investigated. e adsorbent was characterized using FTIR, TGA-DSC, EDX, and nitrogen adsorption-desorption. DNL is composed of many Co(II) surface-binding groups and a BET surface area of 0.2783 m 2 /g dominated by meso-and macropores. Equilibrium was attained in 10 minutes for the three concentrations with a removal efficiency of 85-97%. ∆G°of − 5.424 to − 6.068 KJ/mol at 25 to 60°C, respectively, indicated spontaneous adsorption with increasing temperature. D-R adsorption energies of 0.649 to 2.433 KJ/mol revealed physical adsorption. Maximum adsorption capacity of 9.201-523.900 mg/g was obtained by Freundlich and Jovanovic isotherms. Adsorption was very favourable as evident by the high Kiselev equilibrium constant (11.652-172.78 L/mg) and very low R L values of 0.001-0.026. Adsorption occurred by repulsive mechanism as indicated by Fowler-Guggenheim and Hill-de Boer negative interaction energies (− 16.182 to − 90.163 and − 111.102 to − 3328.86 KJmol − 1 , respectively), confirming maximum Co(II) adsorption at pH 3. Results can be used in the design of an efficient adsorption system using neem leaves which is very efficient in removing low and high levels of heavy metals like cobalt ions from wastewater.

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Section: Adsorptionmentioning

confidence: 99%

“…is metal has significant health effects on humans even in trace amount as indicated in Table 1 [4]. Due to cobalt toxicity at very low levels (Table 1), there is need to develop appropriate technology that can effectively remove cobalt from solution even at very low concentrations.…”

Section: Introductionmentioning

confidence: 99%

One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves

Tsamo

Paltahe

Fotio

et al. 2019

International Journal of Chemical Engineering

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“…Organs which are exposed to the toxicity of cobalt includes liver, lungs, pancreas, cardiovascular system and kidneys. 2,5…”

Section: Mechanism Of Action/ Toxicitymentioning

confidence: 99%

“…Cobalt induce heme oxygenase which might cause oxidation of heme in various organs and also act on heme-containing protein which may stimulate increase in EPO (Erythropoietin). 2…”

Section: Haematological Effectsmentioning

confidence: 99%

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Cobalt Toxicity/Poisoning With Analytical Aspects and Its Management

Jaiswal¹,

Kumar²,

Thakur³

et al. 2019

IJMLR

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Cobalt is one of the essential Components found in trace amounts in human beings, has an atomic number of 27, molecular mass of 58.93 units and represented by the symbol Co. It is important for the formation of Cyanocobalamin or Vitamin B 12 . Normally a healthy diet contains 5 to 50g of cobalt in a day. Cobalt generally does not cause any toxicity or poisoning until the exposed to large amounts and for longer time period. Poisoning can be caused by three ways which include-Swallowing too much, inhaled too much in lungs and constant contact with the skin. Various effects are visible in case of cobalt poisoning which includes cardiovascular effects, neurological, haematological, immunological, dermatological, ophthalmological, gastrointestinal and reproductive system dysfunction. The biological samples which are analysed for cobalt poisoning includes urine, blood, serum and tissues. The various aspects along with the treatment and hospital management is discussed in this paper. Other than that, the analytical techniques which include HR-ICP-MS, XRF, UV Spectrophotometry, ICP-OES are also discussed which are used in the diagnosis.

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Rotational Isomerization about C−C Single Bond in a Novel ICT Probe Facilitates Naked‐Eye, Colorimetric and Ratiometric Detection of Cobalt in Aqueous Samples**

Divya

Thennarasu

2021

ChemistrySelect

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A new UV‐active indole‐pyrazole extended π‐system (probe A) that displays a large bathochromic shift (∼325 nm) when it interacts only with Co2+ and not with other transition metal ions, is presented. The increase in the intensity of new transitions at 592 and 684 nm due to A−Co2+−Cl2.H2O complex formation occurs at the expense of the transition at 358 nm arising from the probe A, and thereby offers a ratiometric method for detection of Co2+ present in aqueous samples. The ratiometric method sets the detection limit for Co2+ at 0.404×10−6 M and 0.337×10−6 M, when calculated for the transitions at 592 and 684 nm, respectively. The corresponding association constants are 4.041×105 M−1 at 592 nm, and 3.617×105 M−1 at 684 nm. Job plot and ESI‐MS data confirmed the 1 : 1 stoichiometry of A−Co2+−Cl2.H2O complex. The mode of interaction between the probe A and Co2+ is explained in terms of conformational isomerization and chelation, using 1H NMR method and DFT calculations. Other metal ions commonly found in the environment do not seem to interfere in the selective determination of Co2+ ions. Suitability of probe A in the detection of Co2+ at concentrations less than 1.7 μM (recommended level of Co2+ ions by US‐EPA) is also demonstrated using water samples collected from the environment. Test kits suitable for routine on‐site analysis are also developed.

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Cobalt Poisoning: A Comprehensive Review of the Literature

Cited by 16 publications

References 22 publications

One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves

One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves

Cobalt Toxicity/Poisoning With Analytical Aspects and Its Management

Rotational Isomerization about C−C Single Bond in a Novel ICT Probe Facilitates Naked‐Eye, Colorimetric and Ratiometric Detection of Cobalt in Aqueous Samples**

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