IMMOBILIZATION DRIED MIX OF ALGAE FOR COPPER REMOVAL

This study was aimed to reveal the effectiveness of Immobilization of biomass (dried mix algae) in the form of bead for the removal of copper ions from synthetic polluted water. Various operational parameters such as pH (2–6), biosorbent dosage (0.5–20 g/L) and initial concentration (10–100 mg/L)The results concluded that a removal efficiency reached up to 90 % , which indicated the fascinated and easiest the handling of biomass. Characterization of the immobilized algae was determined by the Scanning electron microscope with Energy Dispersive X-Ray Analysis (SEM- EDX). The result reveals that the equilibrium time can be reached within 60–80 min. Experimental data were compiled well with Langmuir and Freundlich isotherm with R2 = 0.97 and 0.93, respectively.

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The Synthesis and Effect of Silver Nanoparticles on the Adsorption of Cu2+ from Aqueous Solutions

Applied Sciences ◽

10.3390/app10144840 ◽

2020 ◽

Vol 10 (14) ◽

pp. 4840

Author(s):

Ghadah M. Al-Senani ◽

Nada Al-Kadhi

Keyword(s):

Aqueous Solution ◽

Freundlich Isotherm ◽

Spherical Particles ◽

Convolvulus Arvensis ◽

X Ray ◽

Nanoparticle Surface ◽

Before And After ◽

Adsorption Processes ◽

Sem Analyses

The adsorption of Cu2+ ions from an aqueous solution using AgNPs synthesized from Convolvulus arvensis leaf extract was investigated. The characterization of AgNPs was investigated before and after the adsorption of Cu2+ ions via Fourier-transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM) analyses. The adsorbent contained various functional groups in addition to the AgNPs, which contributed to the Cu2+ ions adsorption. The silver nanoparticle surface consisted of spherical particles and deep pores, which adsorbed numerous Cu2+ ions. The influences of dosage, pH, and contact time on adsorption of 10 and 50 mg/L Cu2+ at 298 K, and initial Cu2+ concentrations at 298 and 323 K were studied. It was found that the highest percentage of Cu2+ ions adsorbed from an aqueous solution was 98.99%; the aqueous solution had 10 mg/L of Cu2+ ions and 0.2 g of AgNPs, at pH 12 and 298 K. A pseudo-second kinetics model offered the most accurate description of the process of adsorption. The process of Cu2+ adsorption more resembled a Langmuir rather than a Freundlich isotherm model, including chemical and physical mixed adsorption (mixed adsorption) processes, and was exothermic and spontaneous.

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Mechanism and Isotherm Modeling of Effective Adsorption of Malachite Green as Endocrine Disruptive Dye using Acid Functionalized Maize Cob (AFMC)

10.21203/rs.3.rs-198632/v1 ◽

2021 ◽

Author(s):

John O Ojediran ◽

Adewumi O. Dada ◽

Stephen O. Aniyi ◽

Robinson O. David

Keyword(s):

Malachite Green ◽

Removal Efficiency ◽

Low Cost ◽

Statistical Error ◽

Freundlich Isotherm ◽

Polluted Water ◽

Operational Parameters ◽

Isotherm Modeling ◽

Malachite Green Dye ◽

Maize Cob

Abstract Cationic Malachite green has been identified as a candidate of endocrine disruptive compound found in the environment. In this study, the mechanism and isotherm modeling of effective adsorption of cationic malachite green dye onto acid functionalized maize cob (AFMC) was investigated by batch technique. The operational parameters such as initial concentration (100–600 mg/L); contact time (10–120 mins) and pH (3–10) influenced the removal efficiency and quantity adsorbed. Maximum of 99.3% removal efficiency was obtained at optimum conditions. AFMC physicochemical properties (surface area 1329 m2/g and particle size 300µm<Ф<250µm) enhanced its efficiency. Based on R2 > 0.97 and consistently low values of SSE, X2, HYBRID and MSPD adsorption statistical error functions (ASEF), equilibrium data were best fitted to Freundlich isotherm. Kinetic data were best described by pseudo second-order model with consistent R2 > 0.98 and validated by ASEF. The mechanism of process was better described by intraparticle diffusion. Evidence of adsorption process was confirmed by change in morphology and surface chemistry determined by SEM and FTIR respectively. The performance of AFMC enlisted it as a sustainable and promising low-cost adsorbent from agro-residue for treatment of endocrine disruptive dye polluted water.

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Characterization of Copper Complex Nanoparticles synthesized by Plant Polyphenols

10.1101/134940 ◽

2017 ◽

Cited By ~ 1

Author(s):

Zhiqiang Wang ◽

Pengfei An

Keyword(s):

Copper Oxide ◽

Copper Ions ◽

Spherical Particles ◽

Oxide Material ◽

X Ray Diffraction ◽

X Ray ◽

X Ray Absorption ◽

Synthesis Approach ◽

Ceramic Catalyst

AbstractIn this paper a kind of copper oxide material of copper–polyphenols complex nanoparticles (Cu–P NPs) were synthesized by Cinnamomum pedunculatum leaves extract, which have different morphology and appearance compared with usual copper oxides Cu2O and CuO. For better understanding about this material, the Cu–P NPs were characterized using scanning electron microscopy (SEM), X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). It was found that synthesized Cu–P NPs were amorphous with spherical particles ranged from 80 to 500 nm. XAS data analysis indicated that the synthesized Cu–P NPs has different molecular structure with Cu2O and CuO. It is assumed that the copper ions chelated with polyphenol molecule. The nanoparticles showed a clear anti Escherichia coli activity in this study, and may also be used in fields of semiconductor, ceramic, catalyst, and sensor. This synthesis approach provided a novel route to manufacture copper oxide nanomaterial.

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Novel Functionalized Cellulose Derivatives Fabricated with Cu Nanoparticle: Synthesis, Characterization and Degradation of Organic Pollutants

10.21203/rs.3.rs-382606/v1 ◽

2021 ◽

Author(s):

Faiza Lughmani ◽

Farzana Nazir ◽

Shahid Ali Khan ◽

Mudassir Iqbal

Keyword(s):

Copper Ions ◽

Nanoparticle Synthesis ◽

Cellulose Derivatives ◽

Oxidized Cellulose ◽

X Ray Diffraction ◽

X Ray ◽

Vis Spectroscopy ◽

Ft Ir ◽

Supporting Material

Abstract In this study, microcrystalline cellulose (MCC) was modified to oxidized cellulose (OC), 6-deoxycellulose hydrazide and 6-deoxycellulose(N,N-diethyl)amine (MCC-Hyd and MCC-DEM) derivatives and employed as supporting material for the synthesis of copper nanoparticles (NPs). Copper ions from aqueous solution were adsorbed and then reduced to zero valent copper (ZVC) NPs using sodium borohydride on films of prepared derivatives. The characterization of prepared derivatives and Cu NPs embedded films was performed using Fourier Transform Infrared Spectroscopy (FT-IR), Elemental analysis, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Nuclear Magnetic Resonance (NMR) spectroscopy. Ultraviolet/Visible (UV-VIS) spectroscopy was performed for the degradation studies of 4-nitrophenol (4-NP) and various azo dyes viz. Congo Red (CR), Methylene Blue (MB), and Methyl orange (MO). Results revealed that all the films showed degradation only in the presence of ZVC NPs. Oxidized cellulose, MCC-Hyd and MCC-DEM showed excellent degradation efficiencies (> 85%) in all the cases. Our findings revealed that MCC derivatives could be efficient and renewable candidates for removal of water pollutants in future.

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Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater

Adsorption Science & Technology ◽

10.1155/2021/6655227 ◽

2021 ◽

Vol 2021 ◽

pp. 1-15

Author(s):

Patience Mapule Thabede ◽

Ntaote David Shooto ◽

Thokozani Xaba ◽

Eliazer Bobby Naidoo

Keyword(s):

Nigella Sativa ◽

Freundlich Isotherm ◽

Synthetic Wastewater ◽

Batch Adsorption ◽

Initial Concentration ◽

X Ray ◽

Operational Conditions ◽

First Order ◽

Chromium Vi ◽

Ketonic Group

The aim of the present study was to utilise pristine and magnetite-sucrose functionalized Nigella Sativa seeds as the adsorbents for the uptake of chromium(VI) and lead(II) ions from synthetic wastewater. Prestine Nigella Sativa seeds were labelled (PNS) and magnetite-sucrose functionalized Nigella Sativa seeds (FNS). The PNS and FNS composites were characterized by Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD). The FTIR analysis of both adsorbents revealed the presence of vibrations assigned to 1749 and 1739 cm-1 (-C=O) for ketonic group for both adsorbents. The amide (-NH) peak was observed at 1533 and 1527 cm-1 on FNS and PNS composites, respectively, whilst the carboxyl group (-COOH) were observed at 1408 cm-1 on both adsorbents. The XRD results of FNS and PNS composites showed a combination of spinel structure and y -Fe2O3 phase confirming the formation of iron oxide. The influence of operational conditions such as initial concentration, temperature, pH, and contact time was determined in batch adsorption system. The kinetic data of Cr(VI) and Pb(II) ions on both adsorbents was described by pseudo-first-order (PFO) model which suggested physisorption process. The sorption rate of Cr(VI) ions was quicker, it attained equilibrium in 20 min, and the rate of Pb(II) ions was slow in 90 min. Freundlich isotherm described the mechanism of Pb(II) ions adsorption on PNS and FNS composites. Langmuir best fitted the uptake of Cr(VI) ions on PNS and FNS. The results for both adsorbents showed that the removal uptake of Pb(II) ions increased when the initial concentration was increased; however, Cr(VI) uptake decreased when the initial concentration increased. The adsorption of Cr(VI) and Pb(II) ions on both adsorbents increased with temperature.

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ADSORPTION OF PHENOL POLLUTANTS FROM AQUEOUS SOLUTION USING Ca-BENTONITE/CHITOSAN COMPOSITE

Jurnal Manusia dan Lingkungan ◽

10.22146/jml.18747 ◽

2015 ◽

Vol 22 (2) ◽

pp. 233 ◽

Cited By ~ 6

Author(s):

Poedji Loekitowati Hariani ◽

Fatma Fatma ◽

Fahma Riyanti ◽

Hesti Ratnasari

Keyword(s):

Electron Microscopy ◽

Aqueous Solution ◽

Contact Time ◽

Batch Adsorption ◽

Shrimp Waste ◽

Initial Concentration ◽

X Ray ◽

Chitosan Composite ◽

Scanning Electron

Phenolic compounds areorganic pollutants that are toxic and carcinogenic.The presence of phenol in the environmentcan be adverse to humanand the environmentalsystem. One methodthat iseffective toreduce thephenolisadsorption. In this study, the adsorption of phenol in aqueous solution using Ca-bentonite/chitosan composite was investigated. Chitosan is the deacetylation product of chitin from shrimp waste. Characterization of Ca-bentonite/chitosan composite was done by using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy-Energy Dispersive X Ray Spectroscopy (SEM-EDX). Batch adsorption studies were performed to evaluate the effects of some parameters such as initial concentration of phenol, composite weight, pH and contact time. The results showed that FTIR spectra of Ca-bentonite/chitosan composite presented the characteristic of peak of Ca-bentonite and chitosan that confirmed the successful synthesis of composite. The SEM-EDX characterizationresultsshowedCa-bentonite surfacecoverage by chitosanand the presence ofcarbonandnitrogenelementsinCa-bentonite/chitosancompositeindicated that chitosan had bonded with bentonite. The optimum condition of adsorption of Ca-bentonite/chitosan to phenol was obtained at 125 mg.L-1 of concentration in which the weight of composite was 1.0 g, the pH of solution was 7, the contact time was 30 minutes, and the capacity of adsorption was 12.496 mg.g-1.

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DEGRADASI KATALITIK ZAT WARNA METIL JINGGA MENGGUNAKAN KATALIS OKSIDA MANGAN MANGANOSITE

Photon: Jurnal Sain dan Kesehatan ◽

10.37859/jp.v9i1.1080 ◽

2018 ◽

Vol 9 (1) ◽

pp. 177-183

Author(s):

Mokhamad Subkhan ◽

Amir Awaluddin ◽

Presetya - ◽

Siti Saidah Siregar ◽

Riska Anggraini

Keyword(s):

Manganese Oxide ◽

Degradation Kinetics ◽

Sol Gel ◽

Order Reaction ◽

Second Order Reaction ◽

X Ray Diffraction ◽

Initial Concentration ◽

X Ray ◽

Scanning Electron

Preparation of manganese oxide by sol-gel method and its application as a catalyst for methyl orange (MO) degradation was carried out using hydrogen peroxide as an oxidant.The characterization of manganese oxide was conducted using X-Ray Diffraction and Scanning Electron Microscope. The effect of initial concentration of MO was examined. Degradation efficiency was decrease with increasing the concentration of MO. The degradation kinetics ofMO followed the second-order reaction kinetics.

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Adsorption of Copper and Iron Using Low Cost Material as Adsorbent

E-Journal of Chemistry ◽

10.1155/2009/682568 ◽

2009 ◽

Vol 6 (1) ◽

pp. 161-168 ◽

Cited By ~ 7

Author(s):

Tariq S. Najim ◽

Nazik J. Elais ◽

Alya A. Dawood

Keyword(s):

Metal Ions ◽

Metal Ion ◽

Copper Ions ◽

Low Cost ◽

Copper Ion ◽

Freundlich Isotherm ◽

Ferrous Ion ◽

Initial Concentration ◽

Solid Adsorbent ◽

Pseudo Second Order

In this study, pine fruit was used as solid adsorbent for removal of ferrous and copper ions from aqueous solutions through batch equilibrium technique. The influence of contact time, pH of the solution and initial concentration of metal ions on adsorbed amount of metal ions were investigated. 90 minutes of adsorption time was found sufficient to reach equilibrium for ferrous ion and 120 minutes for copper ion. Adsorption of metal ions were pH dependent and the results indicate the optimum pH for the removal of Fe+2was found to be 5.0 and that of Cu+2was 7.0, the highest adsorption capacity was found to be 4.8 and 14.1 mg of metal ion per gram of adsorbent at initial concentration of 22.22 mg/L and 57.6 mg/L of ferrous and copper ions respectively and would be higher with higher initial concentration. Ferrous ion was removed by 96.3 - 97.3% and copper ion by 94.1-96% along the whole range of initial concentrations. Isotherm studies showed that the data were best fitted to the Freundlich isotherm model. The kinetic data corresponded well with the pseudo-second order equation, suggesting that the adsorption process is presumably a chemisorption.

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Mechanism and isotherm modeling of effective adsorption of malachite green as endocrine disruptive dye using Acid Functionalized Maize Cob (AFMC)

Scientific Reports ◽

10.1038/s41598-021-00993-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

John O Ojediran ◽

Adewumi Oluwasogo Dada ◽

Stephen O Aniyi ◽

Robinson O. David ◽

Adejoke D Adewumi

Keyword(s):

Malachite Green ◽

Removal Efficiency ◽

Low Cost ◽

Statistical Error ◽

Freundlich Isotherm ◽

Polluted Water ◽

Operational Parameters ◽

Isotherm Modeling ◽

Malachite Green Dye ◽

Maize Cob

AbstractCationic Malachite green has been identified as a candidate for the endocrine disruptive compound found in the environment. In this study, the mechanism and isotherm modeling of effective adsorption of cationic malachite green dye onto acid-functionalized maize cob (AFMC) was investigated by batch technique. The operational parameters such as initial concentration (100–600 mg/L); contact time (10–120 min) and pH (3–10) influenced the removal efficiency and quantity adsorbed. A maximum of 99.3% removal efficiency was obtained at optimum conditions. AFMC physicochemical properties (surface area 1329 m2/g and particle size 300 μm < Ф < 250 μm) enhanced its efficiency. Based on R2 > 0.97 and consistently low values of adsorption statistical error functions (ASEF), equilibrium data were best fitted to Freundlich isotherm. Kinetic data were best described by a pseudo-second-order model with consistent R2 > 0.98 and validated by ASEF. The mechanism of the process was better described by intraparticle diffusion. Evidence of the adsorption process was confirmed by the change in morphology via Scanning Electron Microscopy (SEM) and surface chemistry by Fourier Transform infrared (FTIR). The performance of AFMC enlisted it as a sustainable and promising low-cost adsorbent from agro-residue for treatment of endocrine disruptive dye polluted water.

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The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100071107 ◽

1973 ◽

Vol 31 ◽

pp. 132-133 ◽

Cited By ~ 1

Author(s):

R. E. Herfert

Keyword(s):

Surface Characterization ◽

Analytical Techniques ◽

X Ray Diffraction ◽

Depth Of Penetration ◽

X Ray ◽

The Past ◽

Transmission Electron ◽

Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

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