scholarly journals BIOSORPTION OF Ni (II) IONS BY ARABICAN COFFEE FRUIT (Coffea arabica)

2019 ◽  
Vol 11 (1) ◽  
pp. 32
Author(s):  
Serly Tandigau ◽  
Nursiah La Nafie ◽  
Prastawa Budi
Keyword(s):  
Particle Size ◽  
Metal Ions ◽  
Metal Ion ◽  
Size Variation ◽  
Hydroxyl Group ◽  
Fruit Peel ◽  
Arabica Coffee ◽  
Biosorption Process ◽  
Before And After ◽  
Removal Of Metal Ions

Arabica coffee fruit peel is a material that is abundant and cheap. The material has been used as an adsorbent in the biosorption process for the removal of metal ions of Ni(II) from wastewater. Biosorption of Ni(II) ion by dragon fruit peel was done on the variation of particle size, variation of contact time, pH and concentration. Adsorption capacity was studied by both isotherm adsorptions of Langmuir and Freundlich. The concentration of metal ions Ni(II) before and after adsorption was determined using Atomic Absorption Spectrophotometer (AAS). Results showed that the optimum time was 50 minutes and the optimum pH was 6 with 120 mesh of particle size of biosorption. Results showed that the biosorption of Ni(II) ion using Arabica coffee fruit peel fullfilled the isotherm Langmuir model with the biosorption capacity (Qo) of 18.86 mg/g. The functional group involved in metal ion biosorption of Ni(II) by the peel of coffee fruit is a hydroxyl group (-OH). 

scholarly journals Molecularly Imprinted Polymers for Removal of Metal Ions: An Alternative Treatment Method

Biomimetics ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 38 ◽  
Author(s):  
Özgecan Erdem ◽  
Yeşeren Saylan ◽  
Müge Andaç ◽  
Adil Denizli
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Membrane Filtration ◽  
Polymeric Materials ◽  
Treatment Method ◽  
Terrestrial Environment ◽  
Molecularly Imprinted ◽  
Metal Ion Removal ◽  
Ion Imprinted ◽  
Removal Of Metal Ions

Aquatic and terrestrial environment and human health have been seriously threatened with the release of metal-containing wastewater by the rapid growth in the industry. There are various methods which have been used for removal of ions from the environment, such as membrane filtration, ion exchange, membrane assisted liquid extraction and adsorption. As a sort of special innovation, a polymerization technique, namely molecular imprinting is carried out by specific identification for the target by mixing it with a functional monomer. After the polymerization occurred, the target ion can be removed with suitable methods. At the end of this process, specific cavities, namely binding sites, are able to recognize target ions selectively. However, the selectivity of the molecularly imprinted polymer is variable not only because of the type of ligand but also charge, size coordination number, and geometry of the target ion. In this review, metal ion-imprinted polymeric materials that can be applied for metal ion removal from different sources are discussed and exemplified briefly with different metal ions.

scholarly journals Biosorption of Ni(II), Pb(II) and Zn(II) on calcium alginate beads: equilibrium, kinetic and mechanism studies

2016 ◽  
Vol 18 (3) ◽  
pp. 81-87 ◽  
Author(s):  
Józef Nastaj ◽  
Agata Przewłocka ◽  
Monika Rajkowska-Myśliwiec
Keyword(s):  
Metal Ions ◽  
Calcium Alginate ◽  
Alginate Beads ◽  
Divalent Metal Ions ◽  
Batch Mode ◽  
Biosorption Process ◽  
Lead And Zinc ◽  
Component Systems ◽  
Pseudo Second Order ◽  
Removal Of Metal Ions

Abstract The biosorption process of three divalent metal ions – nickel, lead and zinc- from on calcium alginate from aqueous solution was studied, in single component systems. The biosorbent were investigated by Fourier Transform Infrared Spectroscopy. The batch mode experiments of the adsorption process were carried out as a function of pH, initial metal ions concentration, sorbent dosage and contact time. The adsorption influencing parameters for the maximum removal of metal ions were optimized. The experimental data were analyzed using the Langmuir, Freundlich, Langmuir-Freundlich, Koble-Corrigan and Redlich-Peterson models. The kinetic data of biosorption process were evaluated using pseudo-first and pseudo-second order equations. The Weber and Morris model was employed to interpret the metal ions diffusion in biosorption process.

scholarly journals STUDY OF REMOVAL OF METAL IONS IN WATER USING ZEOLITES SYNTHESIZED WITH CHARCOAL ASHES

2006 ◽  
Vol 05 (3) ◽  
pp. 21-30
Author(s):  
Denise Alves FUNGARO ◽  
Juliana de Carvalho IZIDORO
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Ion Selectivity ◽  
Coal Ash ◽  
Electroplating Effluent ◽  
Zeolitic Material ◽  
Equilibrium Data ◽  
Metal Ion Selectivity ◽  
Removal Of Metal ◽  
Removal Of Metal Ions

The capacity of synthesized zeolites from Brazilian coal ash for the removal of metal ions from aqueous solutions has been investigated. Equilibrium data obtained have been found to fit both the Langmuir and Freundlich adsorption isotherms. The zeolitic material prepared with coal ash from baghouse filter showed the highest removal efficiencies. The metal ion selectivity of this product was determined as: Pb2+ > Cd2+ > Cu2+ > Zn2+ > Ni2+. The maximum cation exchange capacities were between 32.9 and 246.9 mg g-1. Tests showed that the zeolitic material was suitable for removal of zinc from electroplating effluent.

scholarly journals A Study on the Photocatalytic Reduction of Some Metal Ions in Aqueous Solution Using UV- Titanium Dioxide System

2019 ◽  
pp. 1-7
Author(s):  
I. O. Ekwere ◽  
M. Horsfall ◽  
J. O. E. Otaigbe
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Metal Ions ◽  
Metal Ion ◽  
Uv Light ◽  
Kinetic Studies ◽  
Photocatalytic Reduction ◽  
Alkaline Ph ◽  
Removal Of Metal ◽  
Removal Of Metal Ions

The photocatalytic reduction of Cu (II), Pb (II), Cd (II) and Cr (VI) ions in aqueous solution has been investigated. The photocatalyst utilized was nano titanium dioxide, composed of 80% anatase and 20% rutile; the UV light source was a 15 W UV bulb with a wavelength of 254 nm. The results obtained indicated a reduction efficiency order as follows; Cr6+ > Cu2+ > Pb2+ > Cd2+. It was observed that these results correlate with the respective reduction potentials of the metal ions. The effect of pH on the photocatalytic reduction of the metal ions was also carried out and results obtained indicated that with the exception of Cr (VI) ions, higher percentage removal of metal ions from their aqueous solution was recorded at alkaline pH than at acidic pH. This was attributed to an extensive formation of precipitate by the metal ions at alkaline pH. Kinetic studies revealed that the removal of metal ions from their solutions largely followed the pseudo- first-order kinetics. Therefore, the results of this study will be useful in metal ion removal from industrial waste water using photocatalytic process.

scholarly journals Efficient Removal of Metals from Synthetic and Real Galvanic Zinc–Containing Effluents by Brewer’s Yeast Saccharomyces cerevisiae

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3624 ◽  
Author(s):  
Inga Zinicovscaia ◽  
Nikita Yushin ◽  
Daler Abdusamadzoda ◽  
Dmitrii Grozdov ◽  
Margarita Shvetsova
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Metal Ions ◽  
High Efficiency ◽  
Zinc Ions ◽  
Brewer’S Yeast ◽  
Yeast Saccharomyces Cerevisiae ◽  
Brewer's Yeast ◽  
Biosorption Process ◽  
Metal Biosorption ◽  
Removal Of Metal Ions

The performance of the brewer’s yeast Saccharomyces cerevisiae to remove metal ions from four batch systems, namely Zn(II), Zn(II)-Sr(II)-Cu(II), Zn(II)-Ni(II)-Cu(II), and Zn(II)-Sr(II)-Cu(II)-Ba(II), and one real effluent was evaluated. Yeast biosorption capacity under different pH, temperature, initial zinc concentration, and contact time was investigated. The optimal pH for removal of metal ions present in the analyzed solution (Zn, Cu, Ni, Sr, and Ba) varied from 3.0 to 6.0. The biosorption process for zinc ions in all systems obeys Langmuir adsorption isotherm, and, in some cases, the Freundlich model was applicable as well. The kinetics of metal ions biosorption was described by pseudo-first-order, pseudo-second-order, and Elovich models. Thermodynamic calculations showed that metal biosorption was a spontaneous process. The two-stage sequential scheme of zinc ions removal from real effluent by the addition of different dosages of new sorbent allowed us to achieve a high efficiency of Zn(II) ions removal from the effluent. FTIR revealed that OH, C=C, C=O, C–H, C–N, and NH groups were the main biosorption sites for metal ions.

EFFECT OF METAL IONS ON PHOTOCATALYTIC PERFORMANCE OF TiO2 FILM PREPARED BY MICRO-ARC OXIDATION

2019 ◽  
Vol 27 (01) ◽  
pp. 1950093
Author(s):  
ZHONGCAI SHAO ◽  
YONGHUI CUI ◽  
XIAODAN LI ◽  
LINA YU ◽  
XIAOYI SHEN
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Photocatalytic Performance ◽  
Photocatalytic Property ◽  
Transition Element ◽  
Photocatalytic Efficiency ◽  
Surface Scanning ◽  
Before And After ◽  
Micro Arc Oxidation ◽  
New Phase

The effect of different metal ions on the photocatalytic property of TiO2 film prepared by micro-arc oxidation was studied. Photocatalytic experiments showed that the impregnation of metal ions increased the photocatalytic efficiency of TiO2. The increase of transition element Fe[Formula: see text] and the rare earth element Dy[Formula: see text] is more obvious, and the optimum concentration is 0.1[Formula: see text]mol/L. The SEM results showed that there was no significant change on the surface of TiO2 film before and after metal ion immersion. The results of EDS surface scanning showed that Fe and Dy elements were uniformly distributed on the surface of TiO2 film after metal ion impregnation, and the deposition amounts were 0.81% and 3.39%, respectively. XRD results showed that a new phase was formed in Fe[Formula: see text]-impregnated TiO2, which could improve the photocatalytic efficiency.

scholarly journals Optimisation and Modelling of Pb (II) and Cu (II) Biosorption onto Red Algae (Gracilaria changii) by Using Response Surface Methodology

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2325 ◽  
Author(s):  
Mubeen Isam ◽  
Lavania Baloo ◽  
Shamsul Rahman Mohamed Kutty ◽  
Saba Yavari
Keyword(s):  
Response Surface Methodology ◽  
Metal Ions ◽  
Response Surface ◽  
Metal Ion ◽  
Ion Concentration ◽  
Solution Ph ◽  
Gracilaria Changii ◽  
Red Macroalgae ◽  
Removal Of Metal ◽  
Removal Of Metal Ions

The removal of Pb (II) and Cu (II) ions by using marine red macroalgae (Gracilaria changii) as a biosorbent material was evaluated through the batch equilibrium technique. The effect of solution pH on the removal of metal ions was investigated within the range of 2–7. The response surface methodology (RSM) technique involving central composite design (CCD) was utilised to optimise the three main sorption parameters, namely initial metal ion concentration, contact time, and biosorbent dosage, to achieve maximum ion removal. The models’ adequacy of response was verified by ANOVA. The optimum conditions for removal of Pb (II) and Cu (II) were as follows: pH values of 4.5 and 5, initial concentrations of 40 mg/L, contact times of 115 and 45 min, and biosorbent dosage of 1 g/L, at which the maximum removal percentages were 96.3% and 44.77%, respectively. The results of the adsorption isotherm study showed that the data fitted well with the Langmuir’s model for Pb (II) and Cu (II). The results of the adsorption kinetic study showed that the data fitted well with the pseudo-second order model for Pb (II) and Cu (II). In conclusion, red alga biomass exhibits great potential as an efficient low-cost sorbent for removal of metal ions.

Preparation of a Novel Adsorbent and Heavy Metal Ion Adsorption

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Chuanfeng Zang ◽  
Desuo Zhang ◽  
Jiaqing Xiong ◽  
Hong Lin ◽  
Yuyue Chen
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Hyperbranched Polymer ◽  
Metal Ion ◽  
Ion Concentration ◽  
Cotton Fibers ◽  
Practical Applications ◽  
Metal Ion Adsorption ◽  
Ft Ir ◽  
Removal Of Metal Ions

The article focuses on the preparation of a novel adsorbent by grafting amino-terminated hyperbranched polymer to cotton fibers and the adsorption of heavy metal ions from aqueous solution. The prepared novel adsorbent was characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The experimental results show that the amino-terminated hyperbranched polymer was grafted to the oxidized cotton fibers, and the adsorbent with amino-terminated hyperbranched polymer was successfully obtained. The grooves on the surface of the grafted cotton fiber were filled with amino-terminated hyperbranched polymer. The adsorption experiments show that the adsorption amount of Cu2+ and Pb2+ was up to 16.1 mg/g and 13.4 mg/g with the metal ion concentration of 319.5 ppm and 315.9 ppm, respectively. When the dosage of adsorbent was 1.5 g in 100 mL metal ion solution, the adsorption rate of Cu2+ and Pb2+ reached 73.5 wt. % and 71.2 wt.%, respectively. The use of the adsorbent for the removal of metal ions is considered to be efficient and have great potential for practical applications.

Research on Metal Ion Removal of Ceramic Printing Wastewater

2013 ◽  
Vol 664 ◽  
pp. 369-373 ◽  
Author(s):  
Ling Ling Shang ◽  
Ce Shi ◽  
Yong Li Zhang ◽  
Yong Min Liu
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Removal Rate ◽  
Iron Removal ◽  
Reaction Cell ◽  
Solution Ph ◽  
Flame Atomic Absorption ◽  
Removal Of Metal ◽  
Removal Of Metal Ions

The removal of the metal ions in the ceramic printing wastewater was influenced by using, stirring and precipitating of the solution pH, coagulant PAC, coagulant aid PAM and heavy metal scavenger. This experiment investigated the removal effect of the metal ions in the wastewater under different conditions. Flame atomic absorption spectrometry was adopted for the determination of the concentration of metal ions in the wastewater. The studies have shown that alkalization, PAC coagulation treatment have a role in the removal of metal ions in the ceramic printing wastewater. And the chromium and iron removal rate can reached 74.0% and 61.6% respectively. Heavy metal scavenger also have a better role in the removal of metal ions. And the chromium and iron removal rates were 82.3% and 76.2% respectively without dosing PAC. The number of reaction cell has no significant effect on the removal of metal ions.

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