scholarly journals The Adsorption of Ammonium Nitrogen from Milking Parlor Wastewater Using Pomegranate Peel Powder for Sustainable Water, Resources, and Waste Management

2020 ◽  
Vol 12 (12) ◽  
pp. 4880
Author(s):  
Cecilia Hodúr ◽  
Naoufal Bellahsen ◽  
Edit Mikó ◽  
Virág Nagypál ◽  
Zita Šereš ◽  
...  
Keyword(s):  
Surface Characterization ◽  
N Uptake ◽  
Kinetic Studies ◽  
Ammonium Nitrogen ◽  
Operational Parameters ◽  
Pomegranate Peel ◽  
Potential Measurement ◽  
Agricultural Wastewater ◽  
Pseudo Second Order

Agricultural wastewater poses serious risks to the environment due to how it is injudiciously used and managed. We investigated the use of pomegranate peel powder (PPP) to adsorb ammonium ions from milking parlor wastewater, which is applied as a nitrogen source for cropland fertilization despite its environmental ramifications. As a valueless by-product of juice and jam industries, PPP shows promising features and characteristics as a potential bio-adsorbent for ammonium nitrogen removal and recovery. The surface characterization of PPP was performed by zeta potential measurement and attenuated total reflectance Fourier transform infrared Spectroscopy (ATR-FTIR) analysis. The adsorption studies were carried out by batch experiments where the initial ammonium nitrogen (NH4–N) concentration of studied wastewater was 80 mg/L. The effects of different operational parameters, such as pH, adsorbent dose, contact time, stirring speed, and temperature, were investigated. From kinetic studies, the equilibrium time was found to be 120 min, achieving an 81.8% removal synonym of ~2.5 mg/g NH4–N uptake. The adsorption isotherm data fitted well with Langmuir model with correlation (R2) > 0.99. Meanwhile, the kinetics followed pseudo-second order model with correlation (R2) > 0.99.

scholarly journals Study about Doping Ion La3+ onto Surface of Pyrolusite Ore for Removing Simultaneously Both Fluoride and Phosphate from Wastewater

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Nguyen Thi Hue ◽  
Nguyen Hoang Tung
Keyword(s):  
Aqueous Solution ◽  
Kinetic Studies ◽  
Phosphate Adsorption ◽  
Fluoride Removal ◽  
Fluoride Adsorption ◽  
Pseudo Second Order ◽  
Xrd Techniques ◽  
Adsorbent Characterization ◽  
Coexisting Ions

Lanthanum has been doped onto the surface of the natural Pyrolusite for simultaneous removal of phosphate and fluoride in aqueous solution. The adsorbent characterization of the materials was observed by the SEM, BET, and XRD techniques. The dynamics and isotherms models of fluoride and phosphate adsorption, with respect to pH, pHPZC, adsorbent dose, and effect of coexisting ions, were studied. The results showed that lanthanum doped Pyrolusite ore (LDPO) relatively highly adsorbed amount of phosphate and fluoride from aqueous solution. Phosphate and fluoride removal efficiencies of LDPO are approximately 97% and 95%, respectively. Pseudo-first order for kinetic studies of phosphate and fluoride removal of the LDPO was observed with high correlations for fluoride but weak correlations for phosphate. However, pseudo-second order for kinetic studies was high correlation for both phosphate and fluoride. The phosphate and fluoride adsorption capacities of the LDPO significantly decreased with the existence of coions (sulfate, chloride, and nitrate) in the aqueous solution.

Surface Characterization of Poly(acrylonitrile) Membranes Graft-Polymerized with Ionic Monomers As Revealed by ζ Potential Measurement

1998 ◽  
Vol 31 (4) ◽  
pp. 1277-1284 ◽  
Author(s):  
Toshihiko Jimbo ◽  
Mitsuru Higa ◽  
Norihiko Minoura ◽  
Akihiko Tanioka
Keyword(s):  
Surface Characterization ◽  
Potential Measurement ◽  
Ζ Potential ◽  
Poly Acrylonitrile

scholarly journals Biochar from Pine Wood, Rice Husks and Iron-Eupatorium Shrubs for Remediation Applications: Surface Characterization and Experimental Tests for Trichloroethylene Removal

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1776
Author(s):  
Marta M. Rossi ◽  
Ludovica Silvani ◽  
Neda Amanat ◽  
Marco Petrangeli Papini
Keyword(s):  
Surface Characterization ◽  
Fixed Bed ◽  
Experimental Tests ◽  
Environmental Application ◽  
Batch Studies ◽  
Pine Wood ◽  
Bet Analysis ◽  
Pseudo Second Order ◽  
Equilibrium Test

Nowadays porous materials from organic waste, i.e., Biochar (BC), are receiving increased attention for environmental applications. This study adds information on three BCs that have undergone a number of studies in recent years. A Biochar from pine wood, one from rice husk and one from Eupatorium shrubs enriched with Iron, labelled as PWBC, RHBC and EuFeBC respectively, are evaluated for Trichloroethylene (TCE) removal from aqueous solution. Physical-chemical description is performed by SEM-EDS and BET analysis. The decrease of TCE over time follows a pseudo-second order kinetics with increased removal by the PWBC. Freundlich and Langmuir models well fit equilibrium test data. The optimized values of the maximum adsorbed amount, qmax (mg g−1), follows this order 109.41 PWBC > 30.35 EuFeBC > 21.00 RHBC. Fixed-bed columns are also carried out. Best performance is again achieved by PWBC, which operates for a higher number of pore volume, followed by EuFeBC and RHBC. Continuous testing confirms batch studies and makes it possible to evaluate the workability of materials in configurations closer to reality. Results are promising for potential environmental application. In particular, the characterization of several classes of contaminants opens the doors to possible uses in mixed contamination cases.

scholarly journals Copper, nickel and zinc removal by peanut hulls: batch and column studies in mono, tri-component systems and with real effluent

2013 ◽  
Vol 12 (2) ◽  
pp. 206-214 ◽  
Keyword(s):  
Ph Value ◽  
Industrial Effluent ◽  
Chemical Characterization ◽  
Kinetic Studies ◽  
Equilibrium Isotherms ◽  
Column Studies ◽  
Peanut Hulls ◽  
Component Systems ◽  
Pseudo Second Order

The main goal of this research study was the removal of Cu(II), Ni(II) and Zn(II) from aqueous solutions using peanut hulls. This work was mainly focused on the following aspects: chemical characterization of the biosorbent, kinetic studies, study of the pH influence in mono-component systems, equilibrium isotherms and column studies, both in mono and tri-component systems, and with a real industrial effluent from the electroplating industry. The chemical characterization of peanut hulls showed a high cellulose (44.8%) and lignin (36.1%) content, which favours biosorption of metal cations. The kinetic studies performed indicate that most of the sorption occurs in the first 30 min for all systems. In general, a pseudo-second order kinetics was followed, both in mono and tri-component systems. The equilibrium isotherms were better described by Freundlich model in all systems. Peanut hulls showed higher affinity for copper than for nickel and zinc when they are both present. The pH value between 5 and 6 was the most favourable for all systems. The sorbent capacity in column was 0.028 and 0.025 mmol g-1 for copper, respectively in mono and tri-component systems. A decrease of capacity for copper (50%) was observed when dealing with the real effluent. The Yoon-Nelson, Thomas and Yan’s models were fitted to the experimental data, being the latter the best fit.

scholarly journals Modeling biosorption of Cr(VI) onto Ulva compressa L. from aqueous solutions

2017 ◽  
Vol 77 (1) ◽  
pp. 60-69 ◽  
Author(s):  
Asma Aid ◽  
Samira Amokrane ◽  
Djamel Nibou ◽  
Elhadj Mekatel ◽  
Mohamed Trari ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Low Cost ◽  
Kinetic Studies ◽  
Operational Parameters ◽  
Operating Variables ◽  
Ulva Compressa ◽  
Marine Biomass ◽  
Pseudo Second Order ◽  
Full Factorial Experimental Design ◽  
Solid Liquid

Abstract The marine biomass Ulva compressa L. (ECL) was used as a low-cost biosorbent for the removal of Cr(VI) from contaminated aqueous solutions. The operating variables were optimized: pH ∼ 2, initial concentration of 25 mg/L, solid/liquid ratio of 6 g/L and a temperature of 50 °C, leading to an uptake elimination of 96%. A full factorial experimental design technique enabled us to obtain a mathematical model describing the Cr(VI) biosorption and to study the main effects and interactions among operational parameters. The equilibrium isotherm was analyzed by the Langmuir, Freundlich and Dubinin–Radushkevich (D-R) models; it has been found that the adsorption process follows well the Langmuir model. Kinetic studies showed that the pseudo-second order model describes suitably the experimental data. The thermodynamic parameters indicated an endothermic heat and a spontaneity of the Cr(VI) biosorption onto ECL.

Improvement of the Sorption Characteristics of Diatomite by Heat Treatment

2016 ◽  
Vol 721 ◽  
pp. 111-116 ◽  
Author(s):  
Hakim Aguedal ◽  
Hafida Hentit ◽  
Djillali Reda Merouani ◽  
Abdelkader Iddou ◽  
Andrei Shishkin ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Aqueous Solution ◽  
Contact Time ◽  
Kinetic Studies ◽  
Operational Parameters ◽  
Order Model ◽  
Crystalline Phases ◽  
Equilibrium Time ◽  
Pseudo Second Order ◽  
Sorption Characteristics

In this paper, the adsorption of Orange Bezaktiv (SRL-150), onto Diatomite treated at 100°C (Dt-100) and at 300°C (Dt-300) was investigated in aqueous solution. The crystalline phases and surface study of Dt-100 and Dt-300 was investigated using respectively XRD, SEM, FTIR, and BET. The effect of operational parameters such as pH, contact time and, initial dye concentration was studied. From the obtained results there is not drastic difference in the crystalline phases between the obtained materials Dt-100 and Dt-300. The treatment at 300°C increases slightly the specific surface area from 11.09 to 16.12 m2/g, and pores volume. The results of adsorption tests show, that the most suitable pH and equilibrium time were respectively 2 and 30 min, at an adsorbent dosage of 2 g/L. The kinetic studies revealed that the adsorption results fitted very well with pseudo-second order model (R2 = 0.99 for both adsorbents). Adsorption isotherms results were in accordance with Freundlich.

scholarly journals Adsorption of Nitrate Ions onto Sepiolite and Surfactant-Modified Sepiolite

2005 ◽  
Vol 23 (4) ◽  
pp. 323-334 ◽  
Author(s):  
Adnan Özcan ◽  
Mutlu Şahin ◽  
Asiye Safa Özcan
Keyword(s):  
Surface Characterization ◽  
Ph Value ◽  
Spectroscopic Techniques ◽  
Nitrate Ions ◽  
Adsorption Data ◽  
Freundlich Adsorption Isotherm ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Ir Spectroscopic

The adsorption of nitrate ions onto clay minerals has not been given much attention, possibly because clay surfaces are negatively charged. In order to increase the positive charge on the surface, sepiolite was modified in the present studies by treatment with dodecylethyldimethylammonium (DEDMA) bromide. After such modification, it was found that the maximum amount of nitrate ion adsorbed occurred at a pH value of 2.0. The chemical composition of natural sepiolite was determined by EDX methods and surface characterization of both natural and modified sepiolite samples was undertaken using FT-IR spectroscopic techniques. The adsorption of nitrate ions onto these adsorbents was determined by ion chromatography. The kinetic parameters of the adsorption process were calculated and it was shown that the reaction kinetic data could be fitted using the pseudo-second-order rate model. The calculated results indicate that both natural and surfactant-modified sepiolite are effective sorbents for the removal of anionic contaminants; however, the surfactant-modified sepiolite (453 mmol/kg) was more effective than the unmodified sepiolite (408 mmol/kg) in this respect. The adsorption data obtained were well described by the Freundlich adsorption isotherm.

Preferential and Enhanced Adsorption Ability of ZrO2 Nanoparticles for the Removal of Cationic, Anionic and Azo Dyes: Isotherm and Kinetic Studies

2019 ◽  
Vol 19 (11) ◽  
pp. 7221-7228
Author(s):  
Priya Saharan ◽  
Pratibha Bansal ◽  
Ganga Ram Chaudhary ◽  
Ashok K. Sharma
Keyword(s):  
Kinetic Studies ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Zro2 Nanoparticles ◽  
Vis Spectroscopy ◽  
Simple Chemical ◽  
Pseudo Second Order ◽  
Enhanced Adsorption ◽  
Coomassie Brilliant

Adsorption of Coomassie Brilliant Blue R-250, Congo Red and Acridine Orange from aqueous solution has been examined using ZrO2 nanoparticles, which proved to be a novel adsorbent. ZrO2 nanoparticles have been prepared by simple chemical precipitation method. The characterization of ZrO2 nanoparticles has been carried out by UV-vis spectroscopy, FTIR, XRD, TEM and FESEM. ZrO2 nanoparticles were found tetragonal in structure, spherical in morphology, and illustrated constricted size window (8–12 nm). The findings depicted that adsorbate removal on ZrO2 nanoparticles was affected significantly by change in adsorbent dose, pH and initial dye concentration w.r.t to contact time. The isotherms were well elaborated using Langmuir and Freundlich adsorption isotherms. The adsorptive kinetics was also investigated with pseudo-second-order to evaluate constant corresponding to rate. Moreover, the ZrO2 nanoparticles along with adsorbed dyes were desorbed. The identities of recovered nanoparticles as well as the adsorbed dyes were found to be same.

scholarly journals Characterization of Waste Amidoxime Chelating Resin and Its Reutilization Performance in Adsorption of Pb(II), Cu(II), Cd(II) and Zn(II) Ions

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 149
Author(s):  
Chunhui Zheng ◽  
Chunlin He ◽  
Yingjie Yang ◽  
Toyohisa Fujita ◽  
Guifang Wang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Photoelectron Spectroscopy ◽  
Kinetic Studies ◽  
Chelating Resin ◽  
Order Kinetic ◽  
Market Demand ◽  
Solution Ph ◽  
Order Kinetic Model ◽  
Pseudo Second Order

The continuous expansion of the market demand and scale of commercial amidoxime chelating resins has caused large amounts of resin to be discarded around the world. In this study, the waste amidoxime chelating resin was reutilized as an adsorbent for the removal and recovery of Pb(II), Cu(II), Cd(II) and Zn(II) ions from aqueous solutions. The physical morphology and chemical composition of the waste amidoxime chelating resin (WAC-resin) from the factory was characterized by the elemental analyzer, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. The influence of the initial metal ions concentration, contact time, temperature and the solution pH on the adsorption performance of the metal ions was explored by batch experiments. It was shown that the optimal pH was 4. Kinetic studies revealed that adsorption process corresponded with the pseudo-second-order kinetic model and the adsorption isotherm was consistent with the Langmuir model. At room temperature, the adsorption capacities of WAC-resin for Pb2+, Cu2+, Zn2+ and Cd2+ reached 114.6, 93.4, 24.4 and 20.7 mg/g, respectively.

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