Water hyacinth biochar for trivalent chromium adsorption from tannery wastewater

Hashem, Md. Abul; Hasan, Mehedi; Momen, Md. Abdul; Payel, Sofia; Nur‐A‐Tomal, Md. Shahruk

doi:10.1016/j.indic.2020.100022

Cited by 59 publications

(23 citation statements)

References 19 publications

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“…To study the pH effect on the adsorption process, 20 ml trivalent chromium salt solution of known concentration (245.5 ppm) was taken in a series of conical flasks and treated with GO (0.039 g) at different pH range (2)(3)(4)(5). The mixture was agitated in an orbital shaker at 150 rpm for 2 hours at ambient temperature.…”

Section: Effect Of Operational Parameters On Cr(iii) Adsorption Capacity Of Go Effect Of Phmentioning

confidence: 99%

“…Generally, 90 % of the tanneries carry out the chrome tanning process for leather tanning due to excellent hydrothermal stability and some other unique properties like the smoothness of grain, uniform elasticity, and resistance to atmospheric conditions, etc [1,2]. During chrome-tanning, only 60 % of the applied chrome salts are bound with the proteinous fibre (collagen) and the rest is disposed of with wastewaters ranging from 2656 to 5420 mg/L which is 1000 times higher than its threshold limit [3]. Unlike carcinogenic hexavalent chromium, Cr(III) is reported as less hazardous and noncorrosive, however, it also can cause several venomous health hazards, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Graphene Oxide for the Adsorption of Cr(III) from Chrome-Tanning Effluent

Nurnabi¹

2021

PSBJ

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Chromium released with tannery effluent causes severe water pollution which is a great concern to the environment and public health. The removal of chromium from tannery effluent before discharging to the surface water is a crying need for protecting environment and human health. This research work highlights the adsorption potential of graphene oxide (GO) for chromium(III) from hazardous chrome-tanning effluents. The research framework includes preparation and characterization of GO employing Field Emission Scanning Electron Microscopy (FESEM), X-ray diffraction (XRD) analysis, Zeta potential charge (ZPC), and Fourier Transform Infrared Spectroscopy (FTIR). Explanation of the adsorption mechanism, kinetics, and feasibility were also documented. The influence of different operational variables pH, adsorbent dosage, Cr(III) ion concentration, contact time and temperature on adsorption were evaluated by batch experiments. The results demonstrated that the highest chromium removal (98.77 %) was ascertained while treating chrome-tanning effluents (174 mg/L) with 0.6 g/L GO for 20 minutes at pH 4. The adsorption equilibrium followed both Langmuir and Freundlich isotherms with maximum adsorption capacity (qm) of 366.3 mg/g. The adsorption kinetics was nicely interpreted with a pseudo-second-order reaction model and thermodynamically it was spontaneous at lower temperature and exothermic in nature. The metal ions loaded adsorbent was also regenerated and reused for further adsorption of Cr(III) ions from chrome-tanning effluents.

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Section: Effect Of Operational Parameters On Cr(iii) Adsorption Capacity Of Go Effect Of Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Graphene Oxide for the Adsorption of Cr(III) from Chrome-Tanning Effluent

Nurnabi¹

2021

PSBJ

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“…They interfere in power generation, irrigation and avert the sunlight penetration leading to eutrophication. Moreover, they are made up of lignin, cellulose, hemicelluloses and prosperous in hydroxyl groups that assist in adsorption [1,11]. Therefore it will play the dual role of treating the pollutant as well as eradicating the toxic weed [12].…”

Section: Differentmentioning

confidence: 99%

Exploring the Potential of Biochar Activated with Phosphoric Acid towards Hexavalent Chromium Removal

Kalaiarasi

Parameswari

Davamani

2020

IRJPAC

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The biochar derived from the dreadful weed water hyacinth (Eichhornia crassipes) was activated with phosphoric acid was utilized for adsorption of hexavalent chromium (Cr (VI)) from the simulated solution. The characterization (Zeta potential, specific surface area, Scanning Electron Microscope analysis) of biochar was done to study the surface properties of the biochar. The modified biochar (379 m2g-1) recorded 49.80% greater surface area in comparison to the pristine biochar (253 m2g-1). Zeta potential of modified biochar is 4.2 mV and pristine biochar is -13.9 mV. Positively charged modified surface enhance the sorption of negatively charged Cr (VI) ions. Study on effect of pH and concentration revealed that maximum sorption occurred at pH 2 and the increasing trend of concentration resulted in the decreased sorption respectively. The isotherm study was well supported by Langmuir isotherm (R2 value=0.976) defining the monolayer adsorption. Maximum adsorption capacity was recorded for phosphoric acid modified biochar (50.0 mg g-1) than the pristine biochar (35.7 mg g-1). Pseudo second order kinetics (R2 value=0.998) sounds good in explaining the rate of reaction. The findings reflect the utility of acid modified Eichhornia crassipes for heavy metal removal from aqueous medium.

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“…Many industrial production activities such as leather tanning, electroplating, metal rening, metallurgy, and so on will produce chromium-containing wastewater resulting in water environment pollution. [1][2][3] Chromium is a transition metal that has several oxidation states, but chromium trivalent and chromium hexavalent are the most stable. 2 Cr(III) is an essential trace element for the growth of many organisms.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of a novel nanolayered tin phosphate for removing Cr(iii)

Liu

et al. 2021

RSC Adv.

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Water hyacinth biochar for trivalent chromium adsorption from tannery wastewater

Cited by 59 publications

References 19 publications

Synthesis and Characterization of Graphene Oxide for the Adsorption of Cr(III) from Chrome-Tanning Effluent

Synthesis and Characterization of Graphene Oxide for the Adsorption of Cr(III) from Chrome-Tanning Effluent

Exploring the Potential of Biochar Activated with Phosphoric Acid towards Hexavalent Chromium Removal

Hydrothermal synthesis of a novel nanolayered tin phosphate for removing Cr(iii)

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