Distillation waste of rose petals was used to remove Cu(II) and Cr(III) from aqueous solutions. T... more Distillation waste of rose petals was used to remove Cu(II) and Cr(III) from aqueous solutions. The results demonstrated the dependency of metal sorption on pH, sorbent dose, sorbent size, initial bulk concentration, time and temperature. A dosage of 1g/L of rose waste biomass was found to be effective for maximum uptake of Cu(II) and Cr(III). Optimum sorption temperature and pH for Cu(II) and Cr(III) were 303+/-1K and 5, respectively. The Freundlich regression model and pseudo-second-order kinetic model were resulted in high correlation coefficients and described well the sorption of Cu(II) and Cr(III) on rose waste biomass. At equilibrium q(max) (mg/g) of Cu(II) and Cr(III) was 55.79 and 67.34, respectively. The free energy change (DeltaG degrees ) for Cu(II) and Cr(III) sorption process was found to be -0.829 kJ/mol and -1.85 kJ/mol, respectively, which indicates the spontaneous nature of sorption process. Other thermodynamic parameters such as entropy change (DeltaS degrees ), enthalpy (DeltaH degrees )and activation energy (DeltaE) were found to be 0.604 J mol(-1)K(-1), -186.95 kJ/mol and 68.53 kJ/mol, respectively for Cu(II) and 0.397 J mol(-1)K(-1), -119.79 kJ/mol and 114.45 kJ/mol, respectively for Cr(III). The main novelty of this work was the determination of shortest possible sorption time for Cu(II) and Cr(III) in comparison to earlier studies. Almost over 98% of Cu(II) and Cr(III) were removed in only first 20 min at an initial concentration of 100 mg/L.
The pulp left after the extraction of juice from Citrus reticulate (kinnow), is a waste material,... more The pulp left after the extraction of juice from Citrus reticulate (kinnow), is a waste material, which was used as a potential sorbent for Cr(III) and Cr(VI) in the present study. The effect of experimental parameters such as pH, biosorbent dosage, biosorbent particle size, initial metal concentrations, temperature, shaking speed and sorption time on the Cr removal is apparent from the obtained results. The Freundlich isotherm and pseudo second order kinetic models fitted well to the data of Cr(III) and Cr(VI) biosorption by Citrus reticulata waste biomass. Effect of several pretreatments such as gases, natural coagulant and many other chemicals on Cr(III) and Cr(VI) sorption capacity of Citrus reticulata waste biomass was first time analyzed in the present study. The metal sorption capacity of Citrus reticulata waste biomass after a specific pretreatment was not only related to the nature of chemical but also strongly dependent on the oxidation state of the metal.
The potential use of the immobilized Mentha arvensis distillation waste (IMADW) biomass for remov... more The potential use of the immobilized Mentha arvensis distillation waste (IMADW) biomass for removal and recovery of Cu (II) and Zn (II) from aqueous was evaluated in the present study. Biosorption capacity of Cu (II) and Zn (II) on IMADW increased with increase in pH reaching a maximum at 5 for Cu (II) and 6 for Zn (II). The equilibrium sorption data agreed well with Langmuir isotherm model and pseudo-second-order kinetic model in batch mode. Cu (II) and Zn (II) uptake by IMADW was best described by pseudo-first-order kinetic model in ...
Abstract: An attempt was made to assess the biosorption potential of rose waste biomass for the r... more Abstract: An attempt was made to assess the biosorption potential of rose waste biomass for the removal of Pb(II) and Co(II) ions from synthetic effluents. Biosorption of heavy metal ions (.90%) reached equilibrium in 30 min. Maximum removal of Pb(II) and Co(II) occurred at ...
The waste distillery sludge from sugar-cane industry was pretreated physically (boiled, heated an... more The waste distillery sludge from sugar-cane industry was pretreated physically (boiled, heated and autoclaved) as well as chemically (HCl, H(2)SO(4), H(3)PO(4), NaOH, Ca(OH)(2), Al(OH)(3), C(6)H(6), HCHO, CH(3)OH and C1(2)H(25)OSO(3)Na (sodium dodecyl sulphate (SDS)) for assessing the comparative sorption capacity of untreated and modified distillery sludge for Pb(II) biosorption from aqueous solutions. Experiments were conducted in shake flasks on a batch basis to access the effect of different experimental parameters such as pH, biosorbent dosage, biosorbent size, initial Pb(II) concentration and contact time. The uptake capacity 'q' (mg/g) of untreated and pretreated distillery sludge was in following order: NaOH (51.29+/-1.21)>HCl (49.82+/-1.22)>HCHO (49.56+/-1.14)>H(2)SO(4) (47.71+/-1.20)>HgCl(2) (45.32+/-1.06)>Ca(OH)(2)…
Distillation waste of rose petals was used to remove Cu(II) and Cr(III) from aqueous solutions. T... more Distillation waste of rose petals was used to remove Cu(II) and Cr(III) from aqueous solutions. The results demonstrated the dependency of metal sorption on pH, sorbent dose, sorbent size, initial bulk concentration, time and temperature. A dosage of 1g/L of rose waste biomass was found to be effective for maximum uptake of Cu(II) and Cr(III). Optimum sorption temperature and pH for Cu(II) and Cr(III) were 303+/-1K and 5, respectively. The Freundlich regression model and pseudo-second-order kinetic model were resulted in high correlation coefficients and described well the sorption of Cu(II) and Cr(III) on rose waste biomass. At equilibrium q(max) (mg/g) of Cu(II) and Cr(III) was 55.79 and 67.34, respectively. The free energy change (DeltaG degrees ) for Cu(II) and Cr(III) sorption process was found to be -0.829 kJ/mol and -1.85 kJ/mol, respectively, which indicates the spontaneous nature of sorption process. Other thermodynamic parameters such as entropy change (DeltaS degrees ), enthalpy (DeltaH degrees )and activation energy (DeltaE) were found to be 0.604 J mol(-1)K(-1), -186.95 kJ/mol and 68.53 kJ/mol, respectively for Cu(II) and 0.397 J mol(-1)K(-1), -119.79 kJ/mol and 114.45 kJ/mol, respectively for Cr(III). The main novelty of this work was the determination of shortest possible sorption time for Cu(II) and Cr(III) in comparison to earlier studies. Almost over 98% of Cu(II) and Cr(III) were removed in only first 20 min at an initial concentration of 100 mg/L.
The pulp left after the extraction of juice from Citrus reticulate (kinnow), is a waste material,... more The pulp left after the extraction of juice from Citrus reticulate (kinnow), is a waste material, which was used as a potential sorbent for Cr(III) and Cr(VI) in the present study. The effect of experimental parameters such as pH, biosorbent dosage, biosorbent particle size, initial metal concentrations, temperature, shaking speed and sorption time on the Cr removal is apparent from the obtained results. The Freundlich isotherm and pseudo second order kinetic models fitted well to the data of Cr(III) and Cr(VI) biosorption by Citrus reticulata waste biomass. Effect of several pretreatments such as gases, natural coagulant and many other chemicals on Cr(III) and Cr(VI) sorption capacity of Citrus reticulata waste biomass was first time analyzed in the present study. The metal sorption capacity of Citrus reticulata waste biomass after a specific pretreatment was not only related to the nature of chemical but also strongly dependent on the oxidation state of the metal.
The potential use of the immobilized Mentha arvensis distillation waste (IMADW) biomass for remov... more The potential use of the immobilized Mentha arvensis distillation waste (IMADW) biomass for removal and recovery of Cu (II) and Zn (II) from aqueous was evaluated in the present study. Biosorption capacity of Cu (II) and Zn (II) on IMADW increased with increase in pH reaching a maximum at 5 for Cu (II) and 6 for Zn (II). The equilibrium sorption data agreed well with Langmuir isotherm model and pseudo-second-order kinetic model in batch mode. Cu (II) and Zn (II) uptake by IMADW was best described by pseudo-first-order kinetic model in ...
Abstract: An attempt was made to assess the biosorption potential of rose waste biomass for the r... more Abstract: An attempt was made to assess the biosorption potential of rose waste biomass for the removal of Pb(II) and Co(II) ions from synthetic effluents. Biosorption of heavy metal ions (.90%) reached equilibrium in 30 min. Maximum removal of Pb(II) and Co(II) occurred at ...
The waste distillery sludge from sugar-cane industry was pretreated physically (boiled, heated an... more The waste distillery sludge from sugar-cane industry was pretreated physically (boiled, heated and autoclaved) as well as chemically (HCl, H(2)SO(4), H(3)PO(4), NaOH, Ca(OH)(2), Al(OH)(3), C(6)H(6), HCHO, CH(3)OH and C1(2)H(25)OSO(3)Na (sodium dodecyl sulphate (SDS)) for assessing the comparative sorption capacity of untreated and modified distillery sludge for Pb(II) biosorption from aqueous solutions. Experiments were conducted in shake flasks on a batch basis to access the effect of different experimental parameters such as pH, biosorbent dosage, biosorbent size, initial Pb(II) concentration and contact time. The uptake capacity 'q' (mg/g) of untreated and pretreated distillery sludge was in following order: NaOH (51.29+/-1.21)>HCl (49.82+/-1.22)>HCHO (49.56+/-1.14)>H(2)SO(4) (47.71+/-1.20)>HgCl(2) (45.32+/-1.06)>Ca(OH)(2)…
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