Purification of Aqueous Media by Biochars: Feedstock Type Effect on Silver Nanoparticles Removal

Due to the harmful effects of nanoparticles in the environment, their effective removal from aqueous media is of great importance. This paper described the research on the silver nanoparticles (Ag-NPs) sorption on biochars obtained from different feedstock types. The sorbents were produced through pyrolysis (double-barrel method) of the vineyard (BV), paulownia tree (BP), and tobacco (BT). BV exhibited the highest specific surface area, porosity, value of variable surface charge, and content of surface acidic functional groups among the used biochars. The pseudo-second order model best described the obtained adsorption kinetics, whereas the Freundlich model accounted for the registered adsorption data. The Ag-NPs removal was highly efficient in the case of BV, especially in the nanoparticle concentration range 50–500 mg/L. Thus, this biochar can be considered as an ecofriendly, effective, low-cost organic adsorbent, potentially used in the aqueous media purification.

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Adsorption Behaviour of La(III) and Eu(III) Ions from Aqueous Solutions by Hydroxyapatite: Kinetic, Isotherm, and Thermodynamic Studies

Journal of Chemistry ◽

10.1155/2013/751696 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 34

Author(s):

F. Granados-Correa ◽

J. Vilchis-Granados ◽

M. Jiménez-Reyes ◽

L. A. Quiroz-Granados

Keyword(s):

Aqueous Solutions ◽

Metal Ion ◽

Low Cost ◽

Intraparticle Diffusion ◽

Ion Concentration ◽

Adsorption Behaviour ◽

Freundlich Model ◽

Adsorption Data ◽

Isotherm Adsorption ◽

Pseudo Second Order

The hydroxyapatite was successfully synthesized, characterized, and used as an alternative low-cost adsorbent material to study the adsorption behavior of La(III) and Eu(III) ions from nitrate aqueous solutions as a function of contact time, initial metal ion concentration, pH, and temperature by using a bath technique. The kinetic data correspond very well to the pseudo-second-order equation, and in both cases the uptake was affected by intraparticle diffusion. Isotherm adsorption data were well fitted by the Freundlich model equation with1/n>1, indicating a multilayer and cooperative-type adsorption. Thermodynamic parameters for the adsorption systems were determinated at 293, 303, 313, and 323 K. These parameters show that adsorptions of La(III) and Eu(III) ions on hydroxyapatite are endothermic and spontaneous processes. The adsorption was found to follow the order Eu(III) > La(III) and is dependent on ion concentration, pH, and temperature.

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Utilization of Waste Leather Powders for Highly Effective Removal of Dyes from Water

Polymers ◽

10.3390/polym11111786 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1786 ◽

Cited By ~ 8

Author(s):

Liangjun Xia ◽

Chen Li ◽

Sijie Zhou ◽

Zhuan Fu ◽

Yun Wang ◽

...

Keyword(s):

Low Cost ◽

Dye Adsorption ◽

Reactive Dyes ◽

Infrared Analysis ◽

Leather Industry ◽

Textile Materials ◽

Effective Removal ◽

Highly Effective ◽

Equilibrium And Kinetics ◽

Pseudo Second Order

As a natural polymer, leather and its associated industries are known to be the leading economic sector in many countries. However, the huge amounts of leather waste generated from the leather industry causes severe environmental pollution. Herein, cow leather (CL) powders were prepared using a homemade machine and used as a low-cost adsorbent for the effective removal of reactive dyes from wastewater. The as-prepared CL powders exhibited dot-like, rod-like, and fiber-like morphologies. A Fourier transform infrared analysis and an x-ray diffraction analysis demonstrated that the CL powders retained the main structure of the protein contained in it. In addition, an improvement in thermal stability was also observed for the CL powders. Dye adsorption experiments indicate that the CL powders showed the highly effective removal of C.I. Reactive Red 120 (RR120), C.I. Reactive Yellow 127 (RY127), and C.I. Reactive Blue 222 (RB222) with the adsorption capacity of 167.0, 178.9, and 129.6 mg·g−1, respectively. The Langmuir, pseudo-second order, and intraparticle diffusion models could well depict the adsorption equilibrium and kinetics of CL powders toward the investigated reactive dyes. The as-prepared CL powders can be used as a potential adsorbent in the treatment of dye contaminated wastewater. Future studies will mainly focus on the application of the adsorbed CL powders for the pigment printing of textile materials.

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Highly effective removal of Cu(II) in aqueous solution by using mesoporous TiO2

Water Science & Technology ◽

10.2166/wst.2019.327 ◽

2019 ◽

Vol 80 (5) ◽

pp. 884-891

Author(s):

Daying Chen ◽

Nasi Tu ◽

Changkun Si ◽

Meilin Yin ◽

Xiaohui Wang

Keyword(s):

Aqueous Solution ◽

Low Cost ◽

Sol Gel ◽

Mesoporous Tio2 ◽

Adsorption Efficiency ◽

Batch Experiments ◽

Order Model ◽

Effective Removal ◽

Pseudo Second Order ◽

Gel Processing

Abstract Mesoporous TiO2 has been prepared by a brief and simple sol–gel processing and applied for the removal of Cu(II) from aqueous solution. The adsorption behavior of mesoporous TiO2 for Cu(II) was investigated using batch experiments. Results showed that the pseudo-second-order model and Langmuir isotherm were more accurate to describe the kinetics process and adsorption isotherm. Mesoporous TiO2 adsorbent displayed excellent Cu(II) adsorption efficiency (195.52mg g−1). The thermodynamic parameters showed that the adsorption was spontaneous and endothermic. It was also found that mesoporous TiO2 could be used at least seven times without obvious loss of its original adsorption efficiency. Therefore, the obtained mesoporous TiO2 could be employed as an effective and low-cost adsorbent for removal of Cu(II) from contaminated effluents.

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The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells

Journal of Analytical Methods in Chemistry ◽

10.1155/2020/8840666 ◽

2020 ◽

Vol 2020 ◽

pp. 1-10

Author(s):

Joshua N. Edokpayi ◽

Samson O. Alayande ◽

Ahmed Adetoro ◽

John O. Odiyo

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Surface Area ◽

Low Cost ◽

Aqueous Media ◽

Group Analysis ◽

Second Order ◽

Isotherm Models ◽

Macadamia Nut ◽

Pseudo Second Order

In this study, the potential for pulverized raw macadamia nut shell (MNS) for the sequestration of methylene blue from aqueous media was assessed. The sorbent was characterized using scanning electron microscopy for surface morphology, functional group analysis was performed with a Fourier-transform infrared spectrometer (FT-IR), and Brunauer–Emmett–Teller (BET) isotherm was used for surface area elucidation. The effects of contact time, sorbent dosage, particle size, pH, and change in a solution matrix were studied. Equilibrium data were fitted using Temkin, Langmuir, and Freundlich adsorption isotherm models. The sorption kinetics was studied using the Lagergren pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models. The feasibility of the study was established from the thermodynamic studies. A surface area of 2.763 m2/g was obtained. The equilibrium and kinetics of sorption was best described by the Langmuir and the pseudo-second-order models, respectively. The sorption process was spontaneous (−ΔG0=28.72−31.77 kJ/mol) and endothermic in nature (ΔH0=17.45 kJ/mol). The positive value of ΔS0 (0.15 kJ/molK) implies increased randomness of the sorbate molecules at the surface of the sorbent. This study presents sustainable management of wastewater using MNS as a potential low-cost sorbent for dye decontamination from aqueous solution.

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Adsorption of Zn(II) ions from aqueous environment by surface modified Strychnos potatorum seeds, a low cost adsorbent

Polish Journal of Chemical Technology ◽

10.2478/pjct-2013-0041 ◽

2013 ◽

Vol 15 (3) ◽

pp. 35-41 ◽

Cited By ~ 8

Author(s):

P. Senthil Kumar

Keyword(s):

Experimental Data ◽

Low Cost ◽

Agricultural Waste ◽

Coefficient Of Determination ◽

Aqueous Environment ◽

Freundlich Model ◽

Shrinking Core ◽

Pseudo Second Order ◽

Strychnos Potatorum ◽

Surface Modified

Abstract The surface modified Strychnos potatorum seeds (SMSP), an agricultural waste has been developed into an effective adsorbent for the removal of Zn(II) ions from aqueous environment. The Freundlich model provided a better fit with the experimental data than the Langmuir model as revealed by a high coefficient of determination values and low error values. The kinetics data fitted well into the pseudo-second order model with the coefficient of determination values greater than 0.99. The influence of particle diffusion and film diffusion in the adsorption process was tested by fitting the experimental data with intraparticle diffusion, Boyd kinetic and Shrinking core models. Desorption experiments were conducted to explore the feasibility of regenerating the spent adsorbent and the adsorbed Zn(II) ions from spent SMSP was desorbed using 0.3 M HCl with the efficiency of 93.58%. The results of the present study indicates that the SMSP can be successfully employed for the removal of Zn(II) ions from aqueous environment.

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Radiation Induced Silver Nanoparticles in Ionically Crosslinked Alginate Beads for Efficient Catalytic Degradation of Basic Dye

10.21203/rs.3.rs-332011/v1 ◽

2021 ◽

Author(s):

Manal F. abou Taleb ◽

Faten Ismail Abou El Fadl ◽

Hanan Albalwi ◽

Mohamed M. Ibrahim

Keyword(s):

Silver Nanoparticles ◽

Electron Microscope ◽

Calcium Alginate ◽

Degradation Kinetics ◽

Visible Spectrum ◽

Catalytic Degradation ◽

Second Order ◽

Blue Dye ◽

Ag Nps ◽

Pseudo Second Order

Abstract Silver nanoparticles (Ag NPs) are widely used as engineered nanomaterials in many advanced nanotechnologies, due to their versatile, easy and cheap preparations combined with peculiar chemical-physical properties. Their increased production and integration in environmental applications including water treatment raise concerns for their impact on humans and the environment. In this study, gamma radiation dose of 20 kGy was utilized to induce the synthesis silver nanoparticles (Ag NPs) in the alginate micro beads to prepare calcium Alginate/Ag (Ca-ALG/Ag) nanocomposite beads. These beads were then used to degrade toxic basic dyes in waste water. Initially, Ca-ALG /Ag nanocomposite beads were synthesized and characterized using Ultra Violet-visible spectrum (UV-Vis), Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) for confirming the formation of Ag NPs and morphological study. The catalytic efficiency of the resulting Ca-ALG/Ag nanocomposite beads is evaluated for the degradation of dyes such sandocryl blue dye in the presence of NaBH4. The catalytic degradation of sandocryl blue dye was very fast in the present conditions: 0.1 g of catalyst 5 ml NaBH4 and the optimum time for complete reduction was 30 min. The pseudo-first order, pseudo second order and intra particle diffusion model used to evaluate the kinetic models and the mechanism of the degradation. Results showed that the degradation kinetics best fit the pseudo-second-order model and Langmuir isotherm model. The Biopolymer-based nanocomposite beads of calcium alginate, and Ag NPs can be applied to reduce dyestuff, where it is economically viable and environmentally friendly.

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Ultrasonic synthesized Konjac gum/PEG-silver nanoparticles for colorimetric detection of hydrogen peroxide

10.21203/rs.3.rs-212902/v1 ◽

2021 ◽

Author(s):

SELCAN KARAKUŞ ◽

Nevin Taşaltın ◽

Cihat Taşaltın ◽

Nuray Bekoz Üllen

Keyword(s):

Hydrogen Peroxide ◽

Silver Nanoparticles ◽

Biomedical Applications ◽

Limit Of Detection ◽

Low Cost ◽

Colorimetric Detection ◽

Rheological Parameters ◽

Ag Nps ◽

Synthesis Strategy ◽

Konjac Gum

Abstract Green and low-cost synthesis strategy for ultrasonic preparation of polymer blend matrix based silver nanoparticles (Ag NPs) and the development of rapid and high sensitive detection route have a great attention in biomedical applications. Therefore, in this study, we investigated the hydrogen peroxide detection performance of Konjac gum (KG)/PEG-Ag NPs. The KG/PEG-Ag NPs was synthesized via an ultrasonic process and characterized by different techniques such as ultraviolet–visible spectroscopy (UV–Vis), Fourier-Transform Infrared spectroscopy (FT-IR), Scanning Electron Microscope (SEM) and Energy Dispersive X-ray spectroscopy (EDX). Furthermore, we determined the experimental optimization on the effect of the rheological parameters of nanostructure with the highest correlation constant (R 2 : 0.989-0.996), and the intrinsic viscosity (14.71-26.77 dl/g). To provide the miscible polymer blends and homogeneous dispersion of the nanostructure, we compared the rheological parameters with the experimental results. The response time was less than 5 s and the lower limit of detection was 0.071 μM. This novel highly sensitive, rapid, and naked-eye colorimetric biosensor based Ag NPs which are prepared ultrasonic manufacturing approach, opens up a green approach of development facile and rapid detection of hydrogen peroxide in practical biomedical applications.

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Adsorption of Mercury Using Different Types of Activated Bentonite: A Study of Sorption, Kinetics, and Isotherm Models

Jurnal Rekayasa Kimia & Lingkungan ◽

10.23955/rkl.v15i2.17784 ◽

2021 ◽

Vol 15 (2) ◽

pp. 123-131

Author(s):

Muhammad Naswir ◽

Jalius Jalius ◽

Desfaur Natalia ◽

Susila Arita ◽

Yudha Gusti Wibowo

Keyword(s):

Low Cost ◽

Sorption Kinetics ◽

Raw Material ◽

Isotherm Models ◽

Freundlich Model ◽

Different Types ◽

Activated Bentonite ◽

Hazardous Element ◽

Harmful Effects ◽

Percent Removal

Mercury is a hazardous element because of its toxicity and harmful effects on human health. Various traditional and low-cost methods have been developed to remove mercury from wastewater. This study used local raw material as an alternative adsorbent to treat mercury-contaminated wastewater. Activated bentonite was prepared using different chemical activators (H3PO4, HCl, and ZnCl2) in various concentrations. Then, it was dried at 200°C for an hour. The materials were characterized by SEM-EDS. Its percent removal and isotherm models were analyzed. In this study, the most effective activator was H3PO4 and the experimental data matched the Freundlich model.

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SYNTHESIS OF ACTIVATED CARBONS ORIGINATED FROM ORANGE PEEL BY SUBCRITICAL CO2 ACTIVATION METHOD

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.v12i1.944 ◽

2016 ◽

Vol 12 (1) ◽

pp. 61

Author(s):

Arenst Andreas Arie ◽

Emerentina Maerilla Puspaningrum ◽

Henky Muljana

Keyword(s):

Activated Carbons ◽

Low Cost ◽

Diffusion Mechanism ◽

Orange Peel ◽

Batch Adsorption ◽

Activation Process ◽

Activation Temperature ◽

Freundlich Model ◽

Orange Peel Waste ◽

Pseudo Second Order

Low-cost and environmental friendly activated carbons were synthesized from orange peel waste by carbonization followed by activation process using supercritical carbon dioxide. The carbonization process of orange peel waste was conducted in the electrical furnace at temperature of 800 °C for 2 h. Activation process of the impregnated orange peel was carried out in the tubular furnace for 1 h at activation temperature of 140 °C and pressure variation of 80, 125 and 170 bar. Activated carbon with highest surface area of 262.173 m2/g was obtained by co2 pressure of 125 bar. The activated carbons were then utilized as adsorbents for removal of methylene blue (MB) from aqueous solution. The batch adsorption study was carried out by varying the initial concentration of mb solution (2, 4, 6, 8 and 10 ppm). Experimental results showed that the adsorption kinetic of mb fitted the pseudo-second-order rate equation, where as for the adsorption isotherm model followed two models i.e. The dubinin- radushkevich and freundlich model. The adsorption mechanism was found to be governed by the intraparticle and surface diffusion mechanism.

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Fabrication of Interconnected Plasmonic Spherical Silver Nanoparticles with Enhanced Localized Surface Plasmon Resonance (LSPR) Peaks Using Quince Leaf Extract Solution

Nanomaterials ◽

10.3390/nano9111557 ◽

2019 ◽

Vol 9 (11) ◽

pp. 1557 ◽

Cited By ~ 11

Author(s):

Shujahadeen B. Aziz ◽

Govar Hussein ◽

M. A. Brza ◽

Sewara J. Mohammed ◽

R. T. Abdulwahid ◽

...

Keyword(s):

Silver Nanoparticles ◽

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Localized Surface Plasmon Resonance ◽

Low Cost ◽

Ftir Spectrum ◽

Localized Surface Plasmon ◽

Ag Nps ◽

Extract Solution

Interconnected spherical metallic silver nanoparticles (Ag NPs) were synthesized in the current study using a green chemistry method. The reduction of silver ions to Ag NPs was carried out with low-cost and eco-friendly quince leaves. For the first time, it was confirmed that the extract solution of quince leaves could be used to perform green production of Ag NPs. Fourier transform infrared spectroscopy (FTIR) was conducted to identify the potential biomolecules that were involved in the Ag NPs. The results depicted that the biosynthesis of Ag NPs through the extract solution of quince leaf was a low-cost, clean, and safe method, which did not make use of any contaminated element and hence, had no undesirable effects. The majority of the peaks in the FTIR spectrum of quince leaf extracts also emerged in the FTIR spectrum of Ag NPs but they were found to be of less severe intensity. The silver ion reduction was elaborated in detail on the basis of the FTIR outcomes. In addition, through X-ray diffraction (XRD) analysis, the Ag NPs were also confirmed to be crystalline in type, owing to the appearance of distinct peaks related to the Ag NPs. The creation of Ag NPs was furthermore confirmed by using absorption spectrum, in which a localized surface plasmon resonance (LSPR) peak at 480 nm was observed. The LSPR peak achieved in the present work was found to be of great interest compared to those reported in literature. Field emission scanning electron microscopy (FESEM) images were used to provide the morphology and grain size of Ag NPs. It was shown from the FESEM images that the Ag NPs had interconnected spherical morphology.

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