Evaluation of the biosorption potential of a novel Caryota urens inflorescence waste biomass for the removal of hexavalent chromium from aqueous solutions

Rangabhashiyam, S.; Selvaraju, N.

doi:10.1016/j.jtice.2014.09.034

Cited by 121 publications

(31 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such behavior was obvious, because with an increase in adsorbent dosage, the number of active sites available in the adsorbent for the removal Cr(VI) ions will be high, and low for lower adsorbent dosages, due to the progressive saturation of active sites. Similar results have been reported in other literatures 4,17 for the biosorption of Cr(VI) using tea factory waste and Caryota urens. Fig.…”

Section: Effect Of Adsorbent Dosagesupporting

confidence: 92%

“…At lower pH, the surface of grape and olive waste was positively charged, and electrostatic force of attraction occurred with HCrO 4 -, i.e. the functional groups (amino and carboxyl) in the surface of the grape and olive waste were protonated and restricted the approach of cationic species as the result of repulsive forces 5,17 . However, at higher pH values, the surface of grape and olive waste was negatively charged resulting in a repulsive force between grape and olive waste and Cr O H O 2HCrO …”

Section: Effect Of Ph Value On Chromium Adsorption and Speciationmentioning

confidence: 99%

“…Based on the results 9 obtained by FTIR-ATR analysis, the oxygenated functions of lignin structure (guaiacyl, syringyl) were Many earlier studies have claimed that Cr(VI) was removed from the aqueous phase through an adsorption mechanism, whereby anionic Cr(VI) ion species bind to positively charged groups of biomaterials 1,4 . Nowadays, the "adsorption-coupled reduction" reaction is widely accepted as the true mechanism of Cr(VI) adsorption by natural biomaterials under acidic conditions due to its high redox potential value (above +1.3 V at standard condition) 1,4,5,17,18 . From Fig.…”

Section: Effect Of Ph Value On Chromium Adsorption and Speciationmentioning

confidence: 99%

See 2 more Smart Citations

Batch Adsorption of Cr(VI) Ions on Zeolite and Agroindustrial Waste

Kučić

Simonič

Furač

2018

Chem.Biochem.Eng.Q.

View full text Add to dashboard Cite

Several adsorbents, such as natural zeolite clinoptilolite, modified zeolite, grape and olive wastes have been investigated for removal of chromium (VI) ions from aqueous solutions by performing batch kinetic sorption experiments. Natural zeolite, modified zeolite, grape and olive wastes have removed 5 %, 13 %, 73 % and 62 %, respectively, of Cr(VI) ions from aqueous solution. Equilibrium experimental results were fitted to Langmuir and Freundlich isotherms to obtain the characteristic parameters of each model. According to an evaluation using Langmuir equation, the maximum Cr(VI) adsorption capacity of grape waste was 108.12 mg g -1 and of olive waste 100.47 mg g -1 at pH 2. The equilibrium kinetic data were analyzed using pseudo-first-order and pseudo-second-order models, and parameters were estimated by using non-linear regression analysis. Langmuir model and pseudo-second-order model describes better the obtained results than Freundlich model and the pseudo-first-order model. The adsorption of Cr(VI) ions increased with temperature and the negative values of ∆G° for investigated adsorbents confirmed the feasibility and spontaneous nature of the adsorption process.

show abstract

Section: Effect Of Adsorbent Dosagesupporting

confidence: 92%

Section: Effect Of Ph Value On Chromium Adsorption and Speciationmentioning

confidence: 99%

Section: Effect Of Ph Value On Chromium Adsorption and Speciationmentioning

confidence: 99%

See 1 more Smart Citation

Batch Adsorption of Cr(VI) Ions on Zeolite and Agroindustrial Waste

Kučić

Simonič

Furač

2018

Chem.Biochem.Eng.Q.

View full text Add to dashboard Cite

show abstract

“…[17]. The biosorbents contain biomolecules such as the polysaccharides, proteins, etc., with specific functional groups, which are mainly responsible for Cr(VI) biosorption [18]. Different types of biosorbents such as, Laminaria japonica [19], Undaria pinnatifida [19], Porphyra haitanensis [19], Gracilaria lemaneiformis [19], Halimeda gracilis [20], Sterculia guttata shell [21], Maize corn cob [9], Ulva lactuca [22], etc., have been investigated for the removal of Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

Equilibrium and kinetics studies of hexavalent chromium biosorption on a novel green macroalgae Enteromorpha sp.

et al. 2015

Self Cite

View full text Add to dashboard Cite

This study focuses on the use of novel Enteromorpha sp. macroalgal biomass (EMAB), for the biosorption of hexavalent chromium from aqueous solutions. The biosorbent was characterized by Fourier transformer infrared spectroscopy, energy dispersive spectroscopy, and scanning electron microscopy techniques. The effect of experimental parameters such as pH, initial concentration of Cr(VI) ions, biosorbent dosage, and temperature were evaluated. The maximum biosorption capacity for Cr(VI) was observed at pH 2.0. The modeling of the experimental data at equilibrium was performed using two parameter isotherm models. Both Langmuir and Freundlich isotherm equations better fitted the equilibrium data. A contact time of different initial Cr(VI) concentrations was about 160 min to attain biosorption equilibrium. The kinetic data were fitted by models including pseudo-first-order, pseudo-second-order, and intraparticle diffusion. The pseudo-second-order and intraparticle diffusion kinetic models adequately described the kinetic data. Moreover, the thermodynamic parameters indicated that the biosorption process was spontaneous, endothermic, and increased randomness in nature. The results showed that EMAB could be used as an effective biosorbent for the removal of Cr(VI) from aqueous solution. List of symbols A TTemkin isotherm equilibrium binding constant (L mg -1 ) b T Temkin isotherm constant (J mol -1 ) b L Langmuir isotherm constant (L mg -1 ) C 0 Initial Cr(VI) concentration (mg L -1 ) C e Cr(VI) concentration in solution at equilibrium (mg L -1 ) E Mean biosorption energy E (kJ mol -1 ) K F Freundlich constant (L g -1 ) K Dubinin-Radushkevich model constant (mol 2 kJ -2 ) K j Jovanovic isotherm constant (L g -1 ) k 1Pseudo-first-order rate constant (min -1 ) k 2 Pseudo-second-order rate constant (g mg -1 min -1 ) k id Intraparticle diffusion rate constant (mg g -1 min -1/2 ) k c Equilibrium constant m Amount of biosorbent (g) n F Freundlich exponent Q 0 Monolayer coverage capacity (mg g -1 ) Q m Maximum adsorption capacity (mg g -1 ) in Dubinin-Radushkevich model q mj Maximum adsorption capacity in Jovanovic model (mg g -1 ) q e Amount of Cr(VI) ions adsorbed per unit mass of biosorbent (mg g -1 ) R Gas constant (8.314 J mol -1 K -1 ) R L Separation factor V Volume of the solution (L) DG°Gibbs free energy (kJ mol -1 ) DH°Enthalpy (kJ mol -1 ) DS°Entropy (J mol -1 K -1 ) ePolanyi potential

show abstract

“…Most of the adsorption studies have been performed in the batch mode operation to evaluate the effectiveness of adsorbate removal and to determine the maximum adsorption capacity. Various adsorbents from the source of plant waste biomass have been demonstrated for the sequestration of hexavalent chromium through batch adsorption study (AL-Othman et al 2012;Rangabhashiyam and Selvaraju 2015b;Rasoul et al 2014;Parinda and Paitip 2011). The batch adsorption experimental data are generally not applicable directly to the column adsorption (Rangabhashiyam and Selvaraju 2015c).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of hexavalent chromium from synthetic and electroplating effluent on chemically modified Swietenia mahagoni shell in a packed bed column

Rangabhashiyam

Nandagopal

Nakkeeran

et al. 2016

Environ Monit Assess

Self Cite

View full text Add to dashboard Cite

Packed bed column studies were carried out to evaluate the performance of chemically modified adsorbents for the sequestration of hexavalent chromium from synthetic and electroplating industrial effluent. The effects of parameters such as bed height (3-9 cm), inlet flow rate (5-15 mL/min), and influent Cr(VI) concentration (50-200 mg/L) on the percentage removal of Cr(VI) and the adsorption capacity of the adsorbents in a packed bed column were investigated. The breakthrough time increased with increasing bed height and decreased with the increase of inlet flow rate and influent Cr(VI) concentration. The adsorption column models such as Thomas, Adams-Bohart, Yoon-Nelson, and bed depth service time (BDST) were successfully correlated with the experimental data. The Yoon-Nelson and BDST model showed good agreement with the experimental data for all the studied parameter conditions. Results of the present study indicated that the chemically modified Swietenia mahagoni shell can be used as an adsorbent for the removal of Cr(VI) from industrial wastewater in a packed bed column.

show abstract

Evaluation of the biosorption potential of a novel Caryota urens inflorescence waste biomass for the removal of hexavalent chromium from aqueous solutions

Cited by 121 publications

References 59 publications

Batch Adsorption of Cr(VI) Ions on Zeolite and Agroindustrial Waste

Batch Adsorption of Cr(VI) Ions on Zeolite and Agroindustrial Waste

Equilibrium and kinetics studies of hexavalent chromium biosorption on a novel green macroalgae Enteromorpha sp.

Adsorption of hexavalent chromium from synthetic and electroplating effluent on chemically modified Swietenia mahagoni shell in a packed bed column

Contact Info

Product

Resources

About