Remediation techniques applied for aqueous system contaminated by toxic Chromium and Nickel ion

Kumar, Aneel; Balouch, Aamna; Pathan, Ashfaque Ahmed; Mahar, Ali Muhammad; Abdullah, .; Jagirani, Muhammad Saqaf; Mustafai, Faraz Ahmed; Zubair, Muneeba; Laghari, Benazir; Panah, Pirah

doi:10.1080/24749508.2017.1332860

Cited by 17 publications

(4 citation statements)

References 84 publications

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“…Where Kth, is the Thomas constant (mL/min-1 mg-1); qo, is the maximum solute concentration in the solid phase (mg/g); X, is the amount of adsorbent in the column (g), Q is the flow rate (mL/min) and V (L) is the volume of the effluent at the time of operation [9].…”

Section: Thomas Modelmentioning

confidence: 99%

“…Nickel is widely used in production of batteries, steel, alloys, and prolonged exposure to it can cause stomach aches and carcinogenic effects on the blood, kidneys, or chronic bronchitis and alteration of the lung [3]. These metals are bioaccumulative, are magnified in the food chain and are resistant to degradation [8]; therefore, different techniques have been implemented for the removal of heavy metals in solution such as: oxidative techniques, filtration and ultrafiltration, membrane extraction, ion exchange, among others [9], [10]. However, the application of these technologies is expensive due to operational and energy costs, C labor; in addition, they generate toxic waste sludge and have little efficiency at trace concentration levels [11].…”

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confidence: 99%

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Breakthrough and thermodynamic adsorption of Cr (VI) y Ni (II) bioadsorption in continuous system

Tovar¹,

López²,

Lara³

2021

Sci. tech

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The removal of heavy metals present in water is an issue of environmental interest, due to bioaccumulation, biomagnification and the carcinogenic and mutagenic effects on living beings. The objective of the present study was to use plantain peel residues in Chromium (VI) and Nickel (II) removal in continuous system, evaluating the effect of bedheight, temperature and adsorbent particle size on the process; obtaining a 98.7% 99.71% removal yield for Cr (VI) and Ni(II), respectively. The FTIR showed that the bioadsorbent has a heterogeneous structure with the presence of hydroxyl groups, saturated and unsaturated hydrocarbons, carbonyls, carboxyl, among others, and it was established that the process is controlled by electrostatic reactions between the active centers and the metal. The breaka ge curve was carried out under the optimal conditions established by the Response Surface Methodology (RSM) and it was established that the bioadsorbent has an extensive useful life, as it was not saturated throughout the process. The hermodynamic parameters established that the process is exothermic and irreversible, being favored at room temperature. Taking into account the behavior of plantain peels during the breakage curve, it is recommended to use it as a filler in a packed bed to remove Cr (VI) and Ni (II).

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Section: Thomas Modelmentioning

confidence: 99%

mentioning

confidence: 99%

Breakthrough and thermodynamic adsorption of Cr (VI) y Ni (II) bioadsorption in continuous system

Tovar¹,

López²,

Lara³

2021

Sci. tech

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“…But, the later increase in degradation was smaller in range compared to the first showing that the effect of photocatalyst concentration on the degradation efficiency has slowed down. This is because the increased amount of photocatalyst blocks the light from reaching some of the particles which makes some of the photocatalysts surfaces unavailable for light absorption, which indicated that it has approached the optimum concentration of photocatalyst [16,21,22].…”

Section: Variables Effect On the Degradation Efficiency Of Methylene Bluementioning

confidence: 99%

Optimization and biosynthesis of calcined chicken eggshell doped titanium dioxide photocatalyst based nanoparticles for wastewater treatment

2021

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This study presents, biosynthesis of calcinated eggshell (CES) doped with Titanium dioxide (TiO2,) photocatalyst for photodegradation of methylene blue from synthetic wastewater. The influence of three independent variables for improving photodegradation efficiency was investigated and optimized using response surface methodology of Box–Behnken Design on the removal of methylene blue using the calcined chicken eggshells (CES) doped with titanium dioxide. The experimental result showed that 95.8% degradation efficiency of methylene blue by prepared photocatalyst at a contact time of 180 min, initial concentration of methylene blue of 10 ppm, and calcined eggshells (CES) doped with titanium dioxide dose of 2.5 g/L. The synthesized photocatalyst was characterized by Fourier-transform infrared spectroscopy, UV-spectrometer, and X-ray diffractometer and UV–vis Spectroscopy for determined their functional group, structure, and bandgap energy respectively. Their results depict the calcined eggshell doped with titanium dioxide photocatalyst is a promising option for the degradation of methylene blue from industrial wastewater under the stated condition. Highlights Analysis of chicken eggshell wastes are being used as photocatalyst source to calcinated eggshell doped TiO2, i.e., ‘Waste to photocatalyst’ for production of viable sustainable products to bio photocatalyst from wastewater to fulfill the need of an expensive metal-doped catalyst. Photocatalytic degradation of Methylene Blue experiment has been done. The highest degradation efficiency of 95.8% methylene blue was obtained at a contact time of 180 min, 10 ppm of initial concentration of methylene blue, and a dopant dose of 2.5 g/L by using prepared photocatalyst.

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“…Breathing Cr (VI) over a long period increases the risk of lung and nasal cancer. Studies show that the presence of these in drinking water can cause an increased risk of stomach cancer and reproductive harm [10][11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Effect of Temperature and Bed Height on Cr (VI) Bioadsorption in Continuous System

et al. 2020

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In the present paper, the residues of the plantain starch extraction process are proposed as an adsorbent to remove Cr (VI) in a continuous fixed bed-system, varying the temperature in 33, 40, 55, 70 y 76 °C and bed height in the range of 15.5, 30, 65, 100, 114.5 mm. The adsorbent material was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and X-ray Diffraction Analysis (XRD). The Cr (VI) solution at 100 ppm had contact with the column by gravity, with a flow rate of 0.75 mL/s at the different working conditions. At the end of the process, the residual concentration of the metal was measured by UV-Vis spectroscopy using the standard method for the determination of Cr (VI) in water ASTM D1687-17. From the results, it was established that the bioadsorbent has the presence of hydroxyl, carboxyl and methyl functional groups and that the adsorption process is controlled by electrostatic interactions; the variables evaluated had a significant influence on the process because applying the RSM methodology it was observed that the optimal operating conditions are 81.49 mm of bed height and temperature of 68 ºC. Based on the behavior of the rupture curve, it was found that the bio-material has the potential to be used as a filler in an adsorption column with the purpose of remove Cr (VI).

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Remediation techniques applied for aqueous system contaminated by toxic Chromium and Nickel ion

Cited by 17 publications

References 84 publications

Breakthrough and thermodynamic adsorption of Cr (VI) y Ni (II) bioadsorption in continuous system

Breakthrough and thermodynamic adsorption of Cr (VI) y Ni (II) bioadsorption in continuous system

Optimization and biosynthesis of calcined chicken eggshell doped titanium dioxide photocatalyst based nanoparticles for wastewater treatment

Optimization of the Effect of Temperature and Bed Height on Cr (VI) Bioadsorption in Continuous System

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