Competitive Biosorption of Pb(II) and Cu(II) by Functionalised Micropogonias undulates Scales

Background: Modified bio-based adsorbents from plant sources can be used for pollution remediation by adsorption due to their low cost and availability in large quantities. Objective: In this study, the competitive biosorption of Pb(II) and Cu(II) by Micropogonias undulates functionalised fish scales (FFS) was conducted. The functionalisation was done by wet impregnation with Fe2+. Method: The biosorbent was characterised by Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS) and Branueur–Emmett–Teller (BET) analyses. Results: The major constituents in the FFS were calcium and phosphorus from the collagen and apatite on the scales. Optimum removal efficiency for both metals was >99% at 10 g/l dosage. It was observed that the Langmuir isotherm model and the pseudo second order kinetics model were the best fit for the experimental data. The monolayer adsorption capacity of FFS for Pb(II) and Cu(II) was observed to be 96.15 mg/g and 100 mg/g respectively. Conclusion: The study revealed that the competitive biosorption of heavy metals can be achieved (at a good adsorption capacity) using functionalised Micropogonias undulates fish scales.

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Adsorption Of Cd(II) Ions From Aqueous Solution By A Low-Cost Biosorbent Prepared From Ipomea Pes-Caprae Stem

Aceh International Journal of Science and Technology ◽

10.13170/aijst.9.3.18256 ◽

2020 ◽

Vol 9 (3) ◽

pp. 197-206

Author(s):

Thaharah Ramadhani ◽

Faisal Abdullah ◽

Indra Indra ◽

Abrar Muslim ◽

Suhendrayatna Suhendrayatna ◽

...

Keyword(s):

Aqueous Solution ◽

Optimal Condition ◽

Adsorption Capacity ◽

Contact Time ◽

Low Cost ◽

Ph Values ◽

Monolayer Adsorption ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Ft Ir

The use of a low-cost biosorbent prepared from Ipomoea pes-caprae stem for the adsorption of Cd(II) ions from aqueous solution at different contact times, biosorbent sizes, pH values, and initial Cd(II) ions concentration solution was investigated. The biosorbent was analyzed using Fourier-transform infrared spectroscopy (FT-IR) to find important IR-active functional groups. A scanning electron microscope (SEM) was used to examine the biosorbent morphology. The experimental results showed the highest Cd(II) ions adsorption was 29.513 mg/g under an optimal condition as initial Cd(II) ions concentration of 662.77 mg/L, 1 g dose, 80-min contact time, pH 5, 75 rpm of stirring speed, 1 atm, and 30 oC. Cd(II) ions' adsorption kinetics obeys the linearized pseudo-second-order kinetics (R2 = 0.996), and the adsorption capacity is based on the optimal condition, and the rate attained was 44.444 mg/g and 0.097 g/mg. Min, respectively. Besides, the adsorption isotherms were very well fitted by the linearized Langmuir isotherm model, and the monolayer adsorption capacity and pore volume determined was 30.121 mg/g and 0.129 L/mg, respectively. These results indicated the chemisorption nature

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Removal of the pesticide methomyl contained in simulated effluent from equipment washing by adsorption in residual orange bagasse

Research Society and Development ◽

10.33448/rsd-v9i11.8528 ◽

2020 ◽

Vol 9 (11) ◽

pp. e3569118528

Author(s):

Thiago Ruiz Zimmer ◽

Jailton Marques Silva ◽

Diego Henrique de Aquino Rocha ◽

Helder Lopes Teles ◽

Domingos Sávio Barbosa ◽

...

Keyword(s):

Experimental Data ◽

Adsorption Capacity ◽

Simulated Effluent ◽

Carboxylic Groups ◽

Effects Of Ph ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Solid Liquid ◽

Best Fit

This work consists of the study of methomyl removal, an extremely toxic carbamate pesticide, contained in aqueous solutions synthesized, by adsorption in residual orange bagasse from industrial juices processing. The adsorption kinetics was studied by obtaining the best fit for the model of pseudo-second order (R2= 0.949). The Langmuir isotherm model adjusted better to the experimental data confirming the adsorption in monolayers, without interaction among the adsorbate molecules. The scanning electron microscopy (SEM) revealed that particulate adsorbents have rather irregular surface, but with rigid structure and virtually no internal pores. The characterization of the functional groups by infrared spectroscopy (FTIR) revealed the presence of hydroxyl, Carbonyl and carboxylic groups on the adsorbents particles surface. Central composite rotational design 2x2 (DCCR 2x2) was used for the statistical study of the effects of pH and solid/liquid ratio (R) on the methomyl adsorption capacity in orange bagasse particles. The obtained mathematical model adjusted well to the experimental data (R2= 95%). In the studied intervals the highest values of adsorption capacity (q) were 3.73 and 3.43 (mg.g-1), obtained under the conditions of pH 6.0 with R 0.017 g.mL-1 and pH 4.5 with R 0.015 g.mL-1, respectively. Thus, it was possible to conclude that there was a greater adsorption in assays containing greater adsorbent mass in pH slightly acid.

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A functionalized tannin-chitosan bentonite composite with superior adsorption capacity for Cr(VI)

Journal of Polymer Engineering ◽

10.1515/polyeng-2020-0133 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Zhongmin Li ◽

Peng Zou ◽

Junzhou Yang ◽

Miaoyang Huang ◽

Linye Zhang ◽

...

Keyword(s):

Adsorption Capacity ◽

Raw Materials ◽

Low Cost ◽

Maximum Adsorption Capacity ◽

X Ray Diffraction ◽

Initial Ph ◽

System Part ◽

Pseudo Second Order ◽

Ft Ir ◽

Xrd Patterns

AbstractA novel functionalized tannin-chitosan bentonite composite (TCBC) was successfully synthesized. The formation of the composite was confirmed by the X-ray diffraction (XRD) patterns and Fourier transform infrared spectroscopy (FT-IR) analysis. The pHpzc of TCBC was 3.38. The influences such as pH, dosage of TCBC, temperature and initial Cr(VI) concentration on adsorption capacity were investigated. The experimental data indicated that the almost saturated adsorption of the TCBC towards Cr(VI) in 100 min. The maximum adsorption capacity was 262.08 mg/g at 333 K with initial pH = 2.5. The adsorption kinetics of Cr(VI) on TCBC followed the pseudo-second-order kinetics model. The isothermal data were well described by the models of Langmuir, Freundlich and Temkin. The results revealed that the adsorption of Cr(VI) on TCBC existed comprehensive effects and mainly belong to the chemisorption. The TCBC could keep good performances (qe = 192.17 mg/g) in five runs, 1 M NaOH was used as eluent for desorption, which showed a high desorption efficiency. Studies showed TCBC prepared with low cost and green raw materials, and simple green preparation technology had high adsorption capacity, good reusability and acidic tolerance. By exploring the Cr(VI)-Cr(III) hybrid system, part of Cr(VI) was reduced to Cr(III) and adsorbed by TCBC. The optimal adsorption pH of Cr(III) was 5.0.

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Nano-ZrO2/TiO2 Impregnated Orange Wood Sawdust and Peach Stone Shell Adsorbents for Cr (VI) Removal

Current Analytical Chemistry ◽

10.2174/1573411015666191114143128 ◽

2020 ◽

Vol 16 (7) ◽

pp. 880-892

Author(s):

Şerife Parlayıcı ◽

Kübra Tuna Sezer ◽

Erol Pehlivan

Keyword(s):

Contact Time ◽

Ph Value ◽

Order Kinetic ◽

Adsorption Parameters ◽

Wood Sawdust ◽

Adsorption Data ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Ft Ir ◽

Equilibrium Status

Background: In this work, Cr (VI) adsorption on nano-ZrO2๏TiO2 impregnated orange wood sawdust (Zr๏Ti/OWS) and nano-ZrO2๏TiO2 impregnated peach stone shell (Zr๏Ti/PSS) was investigated by applying different adsorption parameters such as Cr (VI) concentrations, contact time, adsorbent dose, and pH for all adsorbents. Methods: The adsorbents were characterized by SEM and FT-IR. The equilibrium status was achieved after 120 min of contact time and optimum pH value around 2 were determined for Cr (VI) adsorption. Adsorption data in the equilibrium is well-assembled by the Langmuir model during the adsorption process. Results: Langmuir isotherm model showed a maximum adsorption value of OWS: 21.65 mg/g and Zr๏Ti/OWS: 27.25 mg/g. The same isotherm displayed a maximum adsorption value of PSS: 17.64 mg/g, and Zr๏Ti/PSS: 31.15 mg/g. Pseudo-second-order kinetic models (R2=0.99) were found to be the best models for describing the Cr (VI) adsorption reactions. Conclusıon: Thermodynamic parameters such as changes in ΔG°, ΔH°, and ΔS° have been estimated, and the process was found to be spontaneous.

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Removal of Chromium(III) and Cadmium(II) Heavy Metal Ions from Aqueous Solutions Using Treated Date Seeds: An Eco-Friendly Method

Molecules ◽

10.3390/molecules26123718 ◽

2021 ◽

Vol 26 (12) ◽

pp. 3718

Author(s):

Mohammad Azam ◽

Saikh Mohammad Wabaidur ◽

Mohammad Rizwan Khan ◽

Saud I. Al-Resayes ◽

Mohammad Shahidul Islam

Keyword(s):

Metal Ions ◽

Adsorption Capacity ◽

Low Cost ◽

Maximum Adsorption Capacity ◽

Solution Ph ◽

Surface Analysis Techniques ◽

Adsorption Processes ◽

Ft Ir ◽

Metal Elution ◽

Date Pits

The aim of the research was to prepare low-cost adsorbents, including raw date pits and chemically treated date pits, and to apply these materials to investigate the adsorption behavior of Cr(III) and Cd(II) ions from wastewater. The prepared materials were characterized using SEM, FT-IR and BET surface analysis techniques for investigating the surface morphology, particle size, pore size and surface functionalities of the materials. A series of adsorption processes was conducted in a batch system and optimized by investigating various parameters such as solution pH, contact time, initial metal concentrations and adsorbent dosage. The optimum pH for achieving maximum adsorption capacity was found to be approximately 7.8. The determination of metal ions was conducted using atomic adsorption spectrometry. The experimental results were fitted using isotherm Langmuir and Freundlich equations, and maximum monolayer adsorption capacities for Cr(III) and Cd(II) at 323 K were 1428.5 and 1302.0 mg/g (treated majdool date pits adsorbent) and 1228.5 and 1182.0 mg/g (treated sagai date pits adsorbent), respectively. It was found that the adsorption capacity of H2O2-treated date pits was higher than that of untreated DP. Recovery studies showed maximal metal elution with 0.1 M HCl for all the adsorbents. An 83.3–88.2% and 81.8–86.8% drop in Cr(III) and Cd(II) adsorption, respectively, were found after the five regeneration cycles. The results showed that the Langmuir model gave slightly better results than the Freundlich model for the untreated and treated date pits. Hence, the results demonstrated that the prepared materials could be a low-cost and eco-friendly choice for the remediation of Cr(III) and Cd(II) contaminants from an aqueous solution.

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Eggshell Powder as an Adsorbent for Removal of Fluoride from Aqueous Solution: Equilibrium, Kinetic and Thermodynamic Studies

E-Journal of Chemistry ◽

10.1155/2012/790401 ◽

2012 ◽

Vol 9 (3) ◽

pp. 1457-1480 ◽

Cited By ~ 47

Author(s):

R. Bhaumik ◽

N. K. Mondal ◽

B. Das ◽

P. Roy ◽

K. C. Pal ◽

...

Keyword(s):

Aqueous Solution ◽

Adsorption Process ◽

Low Cost ◽

Fluoride Removal ◽

Contaminated Water ◽

Fluoride Adsorption ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Kinetic And Thermodynamic Studies ◽

Maximum Removal

A new medium, eggshell powder has been developed for fluoride removal from aqueous solution. Fluoride adsorption was studied in a batch system where adsorption was found to be pH dependent with maximum removal efficiency at 6.0. The experimental data was more satisfactorily fitted with Langmuir isotherm model. The kinetics and the factor controlling adsorption process fully accepted by pseudo-second-order model were also discussed. Eawas found to be 45.98 kJmol-1by using Arrhenius equation, indicating chemisorption nature of fluoride onto eggshell powder. Thermodynamic study showed spontaneous nature and feasibility of the adsorption process with negative enthalpy (∆H0) value also supported the exothermic nature. Batch experiments were performed to study the applicability of the adsorbent by using fluoride contaminated water collected from affected areas. These results indicate that eggshell powder can be used as an effective, low-cost adsorbent to remove fluoride from aqueous solution as well as groundwater.

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Kinetic Study of the Bioadsorption of Methylene Blue on the Surface of the Biomass Obtained from the Algae D. antarctica

Journal of Chemistry ◽

10.1155/2018/2124845 ◽

2018 ◽

Vol 2018 ◽

pp. 1-12 ◽

Cited By ~ 10

Author(s):

Jhonatan R. Guarín ◽

Juan Carlos Moreno-Pirajan ◽

Liliana Giraldo

Keyword(s):

Methylene Blue ◽

Kinetic Study ◽

Adsorption Capacity ◽

Scientific Community ◽

Second Order ◽

Maximum Adsorption Capacity ◽

Pseudo Second Order ◽

Best Fit ◽

Total Elimination ◽

Purification Of Water

Currently, there is a great pollution of water by the dyes; due to this, several studies have been carried out to remove these compounds. However, the total elimination of these pollutants from the aquatic effluents has represented a great challenge for the scientific community, for which it is necessary to carry out investigations that allow the purification of water. In this work, we studied the bioadsorption of methylene blue on the surface of the biomass obtained from the algae D. antarctica. This material was characterized by SEM and FTIR. To the data obtained in the biosorption experiments, different models of biosorption and kinetics were applied, finding that the best fit to the obtained data is given by applying the pseudo-second-order models and the Toth model, respectively. It was also determined that the maximum adsorption capacity of MB on the surface of the biomass is 702.9 mg/g, which shows that this material has great properties as a bioadsorbent.

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Adsorption of Methylene Blue from Aqueous Solution Using Honeycomb-Cinder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.550-553.2259 ◽

2012 ◽

Vol 550-553 ◽

pp. 2259-2262

Author(s):

Song Bo Cui ◽

Hua Yong Zhang ◽

Lu Yi Zhang

Keyword(s):

Methylene Blue ◽

Adsorption Capacity ◽

Ph Value ◽

Dye Wastewater ◽

Batch System ◽

Adsorption Data ◽

Adsorption Processes ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Mb Adsorption

The adsorption behavior of methylene blue (MB) dye from aqueous solutions onto honeycomb-cinder (HC) and its acid-activated product was investigated in a batch system. The results showed the adsorption capacity was decreased for raw HC samples with the increase of pH value, while it was increased for activated samples. The adsorption data were fit with Langmuir isotherm model for MB adsorption by all samples. The MB adsorption capacity on samples was increased from 2.62 mg/g to 7.81 mg/g and 7.00 mg/g after acid-activated by HCl and H2SO4, respectively. The adsorption processes of MB followed pseudo-second-order kinetics with a coefficient of correlation≥0.99. This study demonstrated that acid-activated HC has superior adsorbing ability for MB than raw HC and can be used as alternative adsorbents in dye wastewater treatment.

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A Comparative Study on Hexavalent Chromium Adsorption onto Chitosan and Chitosan-Based Composites

Polymers ◽

10.3390/polym13193427 ◽

2021 ◽

Vol 13 (19) ◽

pp. 3427

Author(s):

Rachid El Kaim Billah ◽

Moonis Ali Khan ◽

Young-Kwon Park ◽

Amira AM ◽

Hicham Majdoubi ◽

...

Keyword(s):

Sio2 Nanoparticles ◽

Analysis Data ◽

Isotherm Models ◽

Equilibration Time ◽

Order Kinetic ◽

Excellent Thermal Stability ◽

Monolayer Adsorption ◽

Pseudo Second Order ◽

Chromium Adsorption ◽

Ft Ir

Chitosan (Cs)-based composites were developed by incorporating silica (Cs–Si), and both silica and hydroxyapatite (Cs–Si–Hap), comparatively tested to sequester hexavalent (Cr(VI)) ions from water. XRD and FT-IR data affirmed the formation of Cs–Si and Cs–Si–Hap composite. Morphological images exhibits homogeneous Cs–Si surface, decorated with SiO2 nanoparticles, while the Cs–Si–Hap surface was non-homogeneous with microstructures, having SiO2 and Hap nanoparticles. Thermal analysis data revealed excellent thermal stability of the developed composites. Significant influence of pH, adsorbent dose, contact time, temperature, and coexisting anions on Cr(VI) adsorption onto composites was observed. Maximum Cr(VI) uptakes on Cs and developed composites were observed at pH 3. The equilibration time for Cr(VI) adsorption on Cs–Si–Hap was 10 min, comparatively better than Cs and Cs–Si. The adsorption data was fitted to pseudo-second-order kinetic and Langmuir isotherm models with respective maximum monolayer adsorption capacities (qm) of 55.5, 64.4, and 212.8 mg/g for Cs, Cs–Si, and Cs–Si–Hap. Regeneration studies showed that composites could be used for three consecutive cycles without losing their adsorption potential.

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Adsorption of strontium on different sodium-enriched bentonites

Journal of the Serbian Chemical Society ◽

10.2298/jsc161010008m ◽

2017 ◽

Vol 82 (4) ◽

pp. 449-463 ◽

Cited By ~ 6

Author(s):

Sanja Marinovic ◽

Marija Ajdukovic ◽

Natasa Jovic-Jovicic ◽

Tihana Mudrinic ◽

Bojana Nedic-Vasiljevic ◽

...

Keyword(s):

Cation Exchange ◽

Adsorption Capacity ◽

Textural Properties ◽

X Ray Diffraction ◽

Order Model ◽

Surface Areas ◽

Alkaline Conditions ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Ph Range

Bentonites from three different deposits (Wyoming, TX, USA and Bogovina, Serbia) with similar cation exchange capacities were sodium enriched and tested as adsorbents for Sr2+ in aqueous solutions. X-Ray diffraction analysis confirmed successful Na-exchange. The textural properties of the bentonite samples were determined using low-temperature the nitrogen physisorption method. Significant differences in the textural properties between the different sodium enriched bentonites were found. Adsorption was investigated with respect to adsorbent dosage, pH, contact time and the initial concentration of Sr2+. The adsorption capacity increased with pH. In the pH range from 4.0?8.5, the amount of adsorbed Sr2+ was almost constant but 2?3 times smaller than at pH ?11. Further experiments were performed at the unadjusted pH since extreme alkaline conditions are environmentally hostile and inapplicable in real systems. The adsorption capacity of all the investigated adsorbents toward Sr2+ was similar under the investigated conditions, regardless of significant differences in the specific surface areas. It was shown and confirmed by the Dubinin?Radushkevich model that the cation exchange mechanism was the dominant mechanism of Sr2+ adsorption. Their developed microporous structures contributed to the Sr2+ adsorption process. The adsorption kinetics obeyed the pseudo-second-order model. The isotherm data were best fitted with the Langmuir isotherm model.

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