CHARACTERISTICS OF Chlorella sp BIOMASS IMMOBILIZED ON CHITOSAN (Chlo-Kit) FOR ADSORPTION OF CHROMIUM(III) SOLUTION

2015 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Titin Anita Zaharah ◽  
Anis Shofiyani ◽  
Endah Sayekti
Keyword(s):  
Metal Ion ◽  
Electrostatic Interactions ◽  
Langmuir Adsorption Isotherm ◽  
Chitosan Hydrogel ◽  
Langmuir Adsorption ◽  
Chlorella Sp ◽  
Optimum Ph ◽  
Ir Spectrophotometry ◽  
Ft Ir ◽  
Biomass Immobilization

<p>Properties of biosorbent prepared from biomass of <em>Chlorella </em>sp immobilized on chitosan (Chlo-Kit) have been studied for adsorption of Chromium(III). Chlo-Kit adsorbent prepared by following steps: dissolving chitosan to get hydrogel form, immobilization of biomasson chitosan hydrogel, <em>beads </em>formation and crosslinkingthe adsorbent beads using epichlorohydrin reagent.</p>Characterization using FT-IR spectrophotometry  and SEM showed that mechanism of biomass immobilization on chitosan involves electrostatic interactions between the functional groups of such both materials. Biomass immobilized on chitosan (Chlo-Kit) showed the higher stability in acid medium than un-immobilized biomass. Adsorption of Cr(III) metal ion on Chlo-Kit occured at optimum pH of 4-5 and followed well the Langmuir adsorption isotherm model. The adsorption capacity of Cr(III) on Chlo-Kit was 68.965 mg/g, about 91% higher than that on Chlorella biomass

scholarly journals CHARACTERISTICS OF Chlorella sp BIOMASS IMMOBILIZED ON CHITOSAN (Chlo-Kit) FOR ADSORPTION OF CHROMIUM(III) SOLUTION

2016 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Titin Anita Zaharah ◽  
Anis Shofiyani ◽  
Endah Sayekti
Keyword(s):  
Metal Ion ◽  
Electrostatic Interactions ◽  
Langmuir Adsorption Isotherm ◽  
Chitosan Hydrogel ◽  
Langmuir Adsorption ◽  
Chlorella Sp ◽  
Optimum Ph ◽  
Ir Spectrophotometry ◽  
Ft Ir ◽  
Biomass Immobilization

<p>Properties of biosorbent prepared from biomass of <em>Chlorella </em>sp immobilized on chitosan (Chlo-Kit) have been studied for adsorption of Chromium(III). Chlo-Kit adsorbent prepared by following steps: dissolving chitosan to get hydrogel form, immobilization of biomasson chitosan hydrogel, <em>beads </em>formation and crosslinkingthe adsorbent beads using epichlorohydrin reagent.</p>Characterization using FT-IR spectrophotometry  and SEM showed that mechanism of biomass immobilization on chitosan involves electrostatic interactions between the functional groups of such both materials. Biomass immobilized on chitosan (Chlo-Kit) showed the higher stability in acid medium than un-immobilized biomass. Adsorption of Cr(III) metal ion on Chlo-Kit occured at optimum pH of 4-5 and followed well the Langmuir adsorption isotherm model. The adsorption capacity of Cr(III) on Chlo-Kit was 68.965 mg/g, about 91% higher than that on Chlorella biomass

scholarly journals Removal of As(III) from Aqueous Solution Using Fe(III) Loaded Pomegranate Waste

2013 ◽  
Vol 30 ◽  
pp. 29-36 ◽  
Author(s):  
Sheela Thapa ◽  
Megh Raj Pokhrel
Keyword(s):  
Metal Ion ◽  
Chemical Society ◽  
Langmuir Adsorption Isotherm ◽  
Ion Concentration ◽  
Maximum Adsorption Capacity ◽  
Langmuir Adsorption ◽  
Batch System ◽  
Optimum Ph ◽  
Removal Of Arsenic ◽  
Adsorbent Dose

A study on As(III) removal using Fe(III) loaded pomegranate waste as an adsorbent is presented. The effects of initial metal ion concentration, contact time, adsorbent dose and pH of the solution on the removal of arsenic were investigated in a batch system. The optimum pH for As(III) adsorption using Fe(III)-loaded charred pomegranate waste [Fe-CPW] was found to be 9. The equilibrium has beenachieved in 2 hours. The maximum adsorption capacity (qmax) for the adsorption of As (III) was found tobe 50 mg/g. The experimental data fitted well with the Langmuir adsorption isotherm model.DOI: http://dx.doi.org/10.3126/jncs.v30i0.9332Journal of Nepal Chemical Society Vol. 30, 2012 Page:  29-36 Uploaded date: 12/16/2013   

scholarly journals Modification of Sulfonated Polyethersulfone Membrane as a Selective Adsorbent for Co(II) Ions

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3569
Author(s):  
Gadeer R. Ashour ◽  
Mahmoud A. Hussein ◽  
Tariq R. Sobahi ◽  
Khalid A. Alamry ◽  
Sara A. Alqarni ◽  
...  
Keyword(s):  
Langmuir Adsorption Isotherm ◽  
Icp Oes ◽  
Thermal Stabilities ◽  
Analytical Technique ◽  
Langmuir Adsorption ◽  
Polyethersulfone Membrane ◽  
Solid Adsorbents ◽  
Ft Ir ◽  
Selective Adsorbent ◽  
Sulfonated Polyethersulfone

In the current study, a variety of sulfonated polyethersulfone (SPES)-based ion-exchange membranes were prepared and utilized as efficient and selective solid adsorbents for the detection of Co(II) ions in aquatic solutions. SPES membranes were treated with a variety of cations at a 2:1 ratio overnight. The produced materials were assessed via XRD, FT-IR, SEM, and TGA analyses. The structure of these materials was confirmed by FT-IR and XRD, which also confirmed the inclusion of Na+, NH4+, and amberlite on the SPES surface successfully. TGA analysis showed that the thermal stabilities of these materials were enhanced, and the order of stability was NH4-SPES > SPES > Na-SPES > A-SPES. Furthermore, the efficiency of these modified membranes for the determination and adsorption of a variety of metal ions was also examined by the ICP-OES analytical technique. A-SPES expressed a powerful efficiency of adsorption, and it showed an efficient as well as quantitative adsorption at pH = 6. Moreover, A-SPES displayed the highest adsorption capacity of 90.13 mg/g for Co(II) through the Langmuir adsorption isotherm.

Synthesis of a Novel Hexanedioyl Thiourea Resin and its Adsorption Properties for Ag(I)

2012 ◽  
Vol 217-219 ◽  
pp. 1213-1217
Author(s):  
Zhong Nan Wang ◽  
Hong Zhong ◽  
Shuai Wang
Keyword(s):  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Interfacial Polymerization ◽  
Langmuir Adsorption Isotherm ◽  
Adsorption Properties ◽  
Chelating Resin ◽  
Langmuir Adsorption ◽  
Polyethylene Polyamine ◽  
Ft Ir ◽  
Equilibrium Adsorption Capacity

A novel hexanedioyl thiourea chelating resin(HTR) was synthesized through interfacial polymerization of hexanedioyl diisothiocyanate and polyethylene polyamine. Its structure was confirmed by FT-IR. The adsorption properties of HTR for Ag(I) were investigated by batch operation . The results show that the adsorption equilibrium of HTR for Ag(I) is achieved after 12 hour at 20°C, the equilibrium adsorption capacity is 4.56mmol/g and increases as the temperature or pH rises, the adsorption process accords with G. E. Boyd equation and Langmuir adsorption isotherm as well, and the silver-loaded resins can be quantitatively eluted by a solution containing 6% thiourea in 1mol/L HNO3.

Synthesis and Adsorption Properties for Ag(I) of Pyridinedicanbnyl Thiourea Resin

2012 ◽  
Vol 581-582 ◽  
pp. 180-184 ◽  
Author(s):  
Zhong Nan Wang ◽  
Hong Zhong ◽  
Shuai Wang
Keyword(s):  
Adsorption Isotherm ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Langmuir Adsorption Isotherm ◽  
Adsorption Properties ◽  
Chelating Resin ◽  
Batch Operation ◽  
Langmuir Adsorption ◽  
Ft Ir ◽  
Equilibrium Adsorption Capacity

A novel pyridinedicanbnyl thiourea chelating resin(PTR) was synthesized from pyridinedicanbnyl diisothiocyanate and diethylene triarmine , its structure was confirmed by FT-IR. The adsorption properties of PTR for Ag(I) were investigated by batch operation . The results show that the adsorption equilibrium of PTR for Ag(I) is achieved after 14 hour at 25°C, the equilibrium adsorption capacity is 4.73mmol/g, the adsorption process accords with G. E. Boyd equation and Langmuir adsorption isotherm as well,and the silver-loaded resins can be quantitatively eluted by a solution containing 6% thiourea in 1mol/L HNO3.

scholarly journals Cadmium Adsorption on Chitosan/Chlorella Biomass Sorbent Prepared by Ionic-Imprinting Technique

2015 ◽  
Vol 15 (2) ◽  
pp. 163-171 ◽  
Author(s):  
Anis Shofiyani ◽  
Narsito Narsito ◽  
Sri Juari Santosa ◽  
Sri Noegrohati ◽  
Titin Anita Zahara ◽  
...  
Keyword(s):  
Binding Sites ◽  
Contact Time ◽  
Selective Adsorption ◽  
Langmuir Adsorption Isotherm ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Chitosan Hydrogel ◽  
Langmuir Adsorption ◽  
Initial Ph ◽  
Pseudo Second Order

Ionic-Imprinted Chitosan/Chlorella biomass sorbent (IICCb) has been synthesized for selective adsorption of Cd(II) adsorption. IICCb was prepared by coating Cd(II)-complexed-chitosan hydrogel on the biomass surface followed by cross-linking procedure. Cd(II)-imprinting ions were then eluted using Na2EDTA solution to provide a specific template for binding sites of Cd(II). Batch adsorption was carried out as function of initial pH, contact time, and initial concentration of the Cd(II) solution. Result showed that the optimum adsorption of Cd(II) was found at pH 4-6. Study of pseudo-second order kinetic showed that the adsorption of Cd(II) on IICCb went faster than that on Ionic-Imprinted Chitosan (IIC) or Non-Imprinted Ionic Chitosan/Chlorella sorbent (NIICCb). The maximum Cd(II) adsorption capacity as obtained from Langmuir adsorption isotherm was found to be 53.76 mg/g on IICCb, that was comparatively higher than that on IIC (44.44 mg/g) or on NIICCb (51.02 mg/g) adsorbent.

Biogenic Jarosite: A Friendly Adsorbent for the Removal of Chromate from Aqueous Solution

2015 ◽  
Vol 737 ◽  
pp. 533-536 ◽  
Author(s):  
Dong Xue Xiao ◽  
Chang Ling Fang ◽  
Jun Zhou ◽  
Xiao Yi Lou ◽  
Jiu Hua Xiao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Isotherm ◽  
Mine Drainage ◽  
Langmuir Adsorption Isotherm ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Langmuir Adsorption ◽  
Adsorption Isotherm Models ◽  
Optimum Ph ◽  
Sulfate Leaching

Ferric hydrosulfate minerals are commonly byproducts of biotic oxidation of Fe (II) in acid mine drainage and biohydrometallurgy like biogenic jarosite. In this study, adsorption of Cr (VI) on jarosite was a rapid process and the optimum pH for Cr (VI) adsorption was found at 7.0. The variation of Cr (VI) adsorbed on jarosite fitted the Langmuir adsorption isotherm models and the maximum adsorption capacity was 3.23 mg/g. It was evident that anion exchange mechanism was responsible for Cr (VI) adsorption on jarosite based on the sulfate leaching data and optimum pH experiments.

scholarly journals SINTESIS MEMBRAN NATA DE PINA DAN APLIKASINYA UNTUK ADSORPSI ZAT WARNA TEKSTIL REMAZOL RED RB

Jurnal Kimia ◽  
2020 ◽  
pp. 134
Author(s):  
I N. Sukarta
Keyword(s):  
Adsorption Isotherm ◽  
Contact Time ◽  
Absorption Capacity ◽  
Langmuir Adsorption Isotherm ◽  
Optimum Conditions ◽  
Langmuir Adsorption ◽  
Pineapple Peel ◽  
Optimum Ph ◽  
Remazol Red ◽  
Test Result

This study utilized pineapple peel waste into a membrane of nata de pina and used as an adsorbent for remazol red RB. The purpose of this study was to synthesis nata de pina membranes, determine the optimum pH, concentration and contact time of adsorption, isotherm pattern, and the maximum adsorption. The results indicated that cellulose nata de pina membranes were successfully synthesized and had the potential to become adsorbents for absorbing remazol red RB dyes. FTIR results showed that membrane nata de pina was a cellulose based membrane with swelling test result of 187.9%. The optimum conditions were at pH 2 with adsorption capacity of 17.12 mg/g, concentration of 80 mg/L with absorption capacity of 22.36 mg/g and contact time at 120 minutes with absorption capacity of 25.29 mg/g. The adsorption of remazol red RB dye has fulfilled the pattern of Langmuir adsorption isotherm with maximum adsorption of 0.0219 g/g or 21.9 mg/g adsorbent. Keywords: Adsorption, Nata de pina, membrane, Remazol red RB

Authentication of the Ancient Easel / Paintings Through Materials Identification from the Polychrome Layers II. Analysis by Means of the FT-IR Spectrophotometry

2008 ◽  
Vol 59 (4) ◽  
Author(s):  
Irina Crina Anca Sandu ◽  
Constantin Luca ◽  
Ion Sandu ◽  
Viorica Vasilache ◽  
Mikiko Hayashi
Keyword(s):  
Degradation Rate ◽  
Animal Glue ◽  
Painting Materials ◽  
Ageing Rate ◽  
Ir Spectrophotometry ◽  
Private And Public ◽  
Ft Ir

This is the second paper belonging to a study concerning the authentication of ancient easel-paintings, on canvas and wood support, from private and public collections, by using the FT-IR spectrophotometry technique for the analysis of the painting materials. Different pigments, egg binders, caseins and animal glue, often found in ancient easel-paintings on wood or canvas, have been used as standards for establishing the ageing rate of the paintings by correlation with the dates presented in the first note. The determination of the degradation rate of the painting materials is an important archaeometric characteristic used in authentication.

scholarly journals Chitosan hydrogel/silk fibroin/Mg(OH)2 nanobiocomposite as a novel scaffold with antimicrobial activity and improved mechanical properties

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Reza Eivazzadeh-Keihan ◽  
Fateme Radinekiyan ◽  
Hooman Aghamirza Moghim Aliabadi ◽  
Sima Sukhtezari ◽  
Behnam Tahmasebi ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Cell Viability ◽  
Silk Fibroin ◽  
Analytical Techniques ◽  
Structural Features ◽  
Mechanical Tests ◽  
Chitosan Hydrogel ◽  
Biological Capacity ◽  
Ft Ir ◽  
Novel Scaffold

AbstractHerein, a novel nanobiocomposite scaffold based on modifying synthesized cross-linked terephthaloyl thiourea-chitosan hydrogel (CTT-CS hydrogel) substrate using the extracted silk fibroin (SF) biopolymer and prepared Mg(OH)2 nanoparticles was designed and synthesized. The biological capacity of this nanobiocomposite scaffold was evaluated by cell viability method, red blood cells hemolytic and anti-biofilm assays. According to the obtained results from 3 and 7 days, the cell viability of CTT-CS/SF/Mg(OH)2 nanobiocomposite scaffold was accompanied by a considerable increment from 62.5 to 89.6% respectively. Furthermore, its low hemolytic effect (4.5%), and as well, the high anti-biofilm activity and prevention of the P. aeruginosa biofilm formation confirmed its promising hemocompatibility and antibacterial activity. Apart from the cell viability, blood biocompatibility, and antibacterial activity of CTT-CS/SF/Mg(OH)2 nanobiocomposite scaffold, its structural features were characterized using spectral and analytical techniques (FT-IR, EDX, FE-SEM and TG). As well as, given the mechanical tests, it was indicated that the addition of SF and Mg(OH)2 nanoparticles to the CTT-CS hydrogel could improve its compressive strength from 65.42 to 649.56 kPa.

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