Adsorption of chromium (Cr) from tannery wastewater using low-cost spent tea leaves adsorbent

Nur-E-Alam, Md.; Mia, Md. Abu Sayid; Farid, Ahmad; Rahman, Md. Mahmudur

doi:10.1007/s13201-018-0774-y

Cited by 62 publications

(26 citation statements)

References 12 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e effect of the Journal of Chemistry adsorbent dose is shown in this study as 97.9% removal efficiency for 1 and it raised to 99% for 1.5 g adsorbent dose; however, a slight increase was observed for the 2 g adsorbent dose (Figure 4(c)). e percentage of metal sorbed increases with an increase in adsorbent dose for the heavy metals [37]. Since the quantity of metal ion is constant, an increase in the amount of adsorbent above a quantity that can completely adsorb the available metal ion had no apparent effect on a further increase of percent adsorption [25].…”

Section: Effects Of Aasac1 Dose On Removal Efficiency Of Pb (Ii)mentioning

confidence: 99%

Adsorption Phenomenon of Arundinaria alpina Stem-Based Activated Carbon for the Removal of Lead from Aqueous Solution

Asrat

Adugna

Kamaraj

et al. 2021

Journal of Chemistry

View full text Add to dashboard Cite

In this study, activated carbon was prepared from locally available bamboo (Arundinaria alpina) in Ethiopia to remove Pb (II) from wastewater. Various effects such as solution pH, initial Pb (II) ion concentration, and adsorbent dose were investigated and accordingly discussed, and the process was carried out on a batch adsorption base. Dried Arundinaria alpina stem was activated with potassium hydroxide (KOH) at a ratio of 1 : 1 (w/v) and carbonized in a furnace at three temperature ranges (500oC, 600oC, and 700oC) for 3 h. The physicochemical of Arundinaria alpina stem activated carbon (AASAC) was investigated and the resultant of 500oC treatment setup is found as ideal in terms of yield (40.6 g), ash (3.5%), porosity (0.704%), moisture (7.7%), and iodine number (814.69 mg/g). The further characterization of ideal AASAC was carried out by scanning electron microscopy (SEM), X-ray diffraction (XRD) spectroscopy, and Fourier transform infra-red (FTIR). The optimum Pb (II) removal efficiency of AASAC was 99.8% at pH 5 in a synthetic solution, but the efficiency declined to 60.42% on real industrial wastewater due to the presence of its mixed pollutant nature. Freundlich isotherm model is more favorable than Langmuir with a high correlation coefficient (R2-0.9496) for Pb (II) adsorption. The study revealed that AASAC has a potential adsorption efficiency to remove the Pb (II) ion from the aqueous solution which is also recommended as an adsorbent for real industry wastewater treatment.

show abstract

Section: Effects Of Aasac1 Dose On Removal Efficiency Of Pb (Ii)mentioning

confidence: 99%

Adsorption Phenomenon of Arundinaria alpina Stem-Based Activated Carbon for the Removal of Lead from Aqueous Solution

Asrat

Adugna

Kamaraj

et al. 2021

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…increases considerably with the increase in adsorbent dosage owing to the availability of vulnerable sites for adsorption [47]. NC4 shows the highest removal efficiency, up to 76%, at a dosage of 1 gram compared to PNF and NC1, NC2, NC3, and NC4 adsorbents owing to the availability of active sites.…”

Section: Effect Of Dosagementioning

confidence: 99%

Thermodynamic and kinetic study of adsorptive removal of lead by the nanocomposite loaded nanofibers

2021

Turk J Chem

View full text Add to dashboard Cite

Herein, the fabrication of electrospun nanocomposites, using polyacrylonitrile nanofibers (PNF) modified with nano-bentonite and fly ash, is explained. Further, the use of electrospun adsorbent for the remediation of Pb (II) ions from water has been explored. Pristine PNF and nanocomposites were characterized using SEM, EDX, and FTIR to analyze surface topology, elemental composition, and functional groups, respectively. The adsorptive behavior of developed adsorbents was investigated using the effects of dosage, initial concentration, time, and temperature. Pseudo-second order kinetics fit well with experimental data and the adsorption followed intra-particle diffusion. The thermodynamics study confirmed spontaneous endothermic adsorption of the heavy metal. Nanocomposites-based adsorbents showed improved adsorption capacity for Pb (II) ions compared to pristine PNF.

show abstract

“…erefore, the optimal dose is determined to be about 2.5 g/L. Nur-E-Lam [45] studied the removal of Cr(VI) from leather industry wastewater by adsorption on tea leaf waste. ey showed that 14 g/L is required to adsorb 95.42% of Cr(VI).…”

Section: Effect Of Adsorbent Dosementioning

confidence: 99%

Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

Loulidi

Boukhlifi

Ouchabi

et al. 2021

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Industrial discharges loaded with heavy metals present several problems for aquatic ecosystems and human health. In this context, the present study aims to evaluate the potential of raw spent coffee grounds to remove chromium from an aqueous medium. A structural and textural study of coffee grounds was carried out by FTIR, XRD, and TGA analysis. The optimum conditions for the removal of Cr(VI), for a solution with an initial concentration of 100 mg/l, were adsorbent dose 2.5 g/l, pH 4.0, and contact time 90 min. The adsorption equilibrium results show that the Langmuir isotherm best describes the process with an adsorption capacity of 42.9 mg/g and that the adsorption kinetics follows the pseudosecond-order model. The calculated thermodynamic parameters showed that the adsorption is exothermic and spontaneous. The activation energy value (Ea) indicated that the retention is physisorptive in nature. The regeneration of the adsorbent was carried out by three eluents, among which HCl was the best. Finally, a brief cost estimation showed the great potential of coffee grounds as a low-cost adsorbent.

show abstract

Adsorption of chromium (Cr) from tannery wastewater using low-cost spent tea leaves adsorbent

Cited by 62 publications

References 12 publications

Adsorption Phenomenon of Arundinaria alpina Stem-Based Activated Carbon for the Removal of Lead from Aqueous Solution

Adsorption Phenomenon of Arundinaria alpina Stem-Based Activated Carbon for the Removal of Lead from Aqueous Solution

Thermodynamic and kinetic study of adsorptive removal of lead by the nanocomposite loaded nanofibers

Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

Contact Info

Product

Resources

About