Biosorption of heavy metals from aqueous solutions using indigenous and modified lignocellulosic materials

Salman, Muhammad; Athar, Makshoof; Farooq, Umar

doi:10.1007/s11157-015-9362-x

Cited by 99 publications

(48 citation statements)

References 127 publications

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“…It was observed that biosorption increased with the increase in temperature that showed that the phenomenon was endothermic, biosorption increased either due to the increase in active sites or due to the increase in diffusion of the metal ion onto biosorbent. Closely a similar finding has also been reported in previous studies (28). Enthalpy change (ΔH°), free energy change (ΔG°) and entropy changes (ΔS°) are promising factors for the determination of biosorption thermodynamics and calculated by the following equations:…”

Section: Effect Of Temperaturethermodynamic Studysupporting

confidence: 87%

Biosorption characteristics ofPennisetum glaucumfor the removal of Pb(II), Ni(II) and Cd(II) ions from aqueous medium

Yousaf

Athar

Salman

et al. 2017

Green Chemistry Letters and Reviews

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Kinetics and thermodynamic studies were carried out for the removal of heavy metals (Pb +2 , Ni +2 and Cd +2) from aqueous solution by using Pennisetum glaucum. Surface morphology and elemental analysis were investigated with scanning electron microscope and energy dispersion X-ray spectroscope analysis. Functional group characteristics were found by a Fourier transform infrared spectrophotometer. The identified groups as binding sites for metal ions were found to be carbonyl (C=O), hydroxyl (OH) and amide (NH). Process parameters such as biosorbent dose, contact time, solution pH, initial metal ion concentration and so on were also studied in batch mode. The optimum pH for the studied process was found to be 5-6. Equilibrium data obtained from the batch process fitted well with the Langmuir isotherm and the process followed pseudo second-order kinetics. P. glaucum was found to be economical, ecofriendly and an effective biosorbent in sequestration of heavy metals from water.

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Section: Effect Of Temperaturethermodynamic Studysupporting

confidence: 87%

Biosorption characteristics ofPennisetum glaucumfor the removal of Pb(II), Ni(II) and Cd(II) ions from aqueous medium

Yousaf

Athar

Salman

et al. 2017

Green Chemistry Letters and Reviews

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“…[1][2][3][4] Many of them such as coir, jute, date pits, corncob, rice straw, fruit peel waste, bark, or sawdust have been tested and proposed for the removal of metals, phenols, dyes, fluorides, phosphates, or pesticides present in wastewaters. [5][6][7][8][9][10][11][12][13][14] The hemp plant (Cannabis sativa L.) also deserves particular attention. [15][16][17][18][19][20][21][22][23][24][25] As a biodegradable plant which needs no irrigation or phytosanitary treatments, hemp is excellent as a crop rotation leader to alternate with crops such as beets or grains.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of Cd, Co, Cu, Mn, Ni, and Zn from synthetic solutions on a hemp‐based felt. II. Chemical modification

Loiacono

Crini

Martel

et al. 2017

J of Applied Polymer Sci

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International audienceIn this study, we propose a chemical pretreatment to improve the performance of a hemp-based material in felt formused as an adsorbent for removing the metals from aqueous mixtures of Cd, Co, Cu, Mn, Ni, and Zn. The felt was coated with amaltodextrin-1,2,3,4-butane tetracarboxylic polymer in order to provide ion-exchange properties to the material by introducing carboxylicgroups. It was characterized by solid-state 13 C-NMR technique and by Energy-dispersive X-ray spectroscopy. This new adsorbentwas then used in batch experiments and its performances were compared with those of non-modified hemp. Differentcontrolling experimental conditions have been investigated. Modified hemp exhibited strong adsorption capacities due to a chemisorptionmechanism (complexation, ion exchange): up to 25 mg/L (in reality, 150 mg of metals per L), all metals in the solutionwere removed. A modified hemp dosage of 1 g was able to remove 13.91 mg of metals in 100 mL of solution at a concentration of25 mg/L for each metal, whereas non-modified hemp only removed 7.4 mg in the same experimental conditions. Adsorption of metalsreached equilibrium in 60 min and the performances were pH-independent between 3 and 6, but dependent on the presence ofNaCl, except for Cu

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“…Many of them have been tested and proposed for pollutant removal. [15][16][17][18][19][20] The hemp plant (Cannabis sativa L.) deserves particular attention.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of Cd, Co, Cu, Mn, Ni and Zn from synthetic solutions on a hemp‐based felt: Experimental design

Loiacono

Morin‐Crini

Cosentino

et al. 2016

J of Applied Polymer Sci

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International audienceThe potential of using a hemp-based material in felt form as an adsorbent for removing the metals from aqueous mixturesof Cd, Co, Cu, Mn, Ni, and Zn is investigated in the present study using batch experiments at an initial pH between 4.9 and5.2. The operating variables studied were initial metal concentration, adsorbent dosage, contact time, agitation speed, temperature,presence of NaCl, and pH. Experiments showed that this nonconventional adsorbent exhibited interesting capacities: 1 g of hemp wasable to remove 7.4 mg of metals at a concentration of 25 mg/L for each metal present in 100 mL of solution. Kinetic results showedthat the process was uniform and rapid: adsorption of metals reached equilibrium in 10 min. The adsorption capacities were almostindependent of temperature between 25 and 50 8C and pH between 4 and 6, but dependent on the presence of electrolytes such asNaCl. Interesting results were also obtained for real polymetallic effluents. All these findings are significant for the future developmentof hemp-based materials for use as bag filters for metal removal from industrial effluents

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Biosorption of heavy metals from aqueous solutions using indigenous and modified lignocellulosic materials

Cited by 99 publications

References 127 publications

Biosorption characteristics ofPennisetum glaucumfor the removal of Pb(II), Ni(II) and Cd(II) ions from aqueous medium

Biosorption characteristics ofPennisetum glaucumfor the removal of Pb(II), Ni(II) and Cd(II) ions from aqueous medium

Simultaneous removal of Cd, Co, Cu, Mn, Ni, and Zn from synthetic solutions on a hemp‐based felt. II. Chemical modification

Simultaneous removal of Cd, Co, Cu, Mn, Ni and Zn from synthetic solutions on a hemp‐based felt: Experimental design

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