scholarly journals Magnetite Oxide Nanomaterial Used for Lead Ions Removal from Industrial Wastewater

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2831
Author(s):  
Oana Stoian ◽  
Cristina Ileana Covaliu ◽  
Gigel Paraschiv ◽  
Gina-Alina Catrina (Traistaru) ◽  
Mihai Niță-Lazăr ◽  
...  
Keyword(s):  
Contact Time ◽  
Industrial Wastewater ◽  
Adsorption Process ◽  
Lead Ions ◽  
Maximum Efficiency ◽  
Precipitation Process ◽  
Treatment Efficiency ◽  
Efficient Removal ◽  
Influence Of Ph ◽  
Langmuir And Freundlich Models

The aim of this article is to present a nonconventional method for the efficient removal of lead ions from industrial wastewater. For this purpose, magnetite nanomaterial was used, which was very easily separated from the wastewater at the end of the treatment due to its magnetic properties. Currently, nanotechnology is an efficient and inexpensive manner that is being researched for wastewater treatment. Additionally, iron oxide nanoparticles are widely used to remove heavy metal ions from water due to their special properties. The experimental results detailed in this article show the influence of pH and contact time on the process of adsorption of lead ions from wastewater. The magnetite nanomaterial had its maximum efficiency of speed when the wastewater had pH 6. At a lower pH, the highest treatment efficiency was over 85%, and the required contact time has doubled. When the pH increases above 6, the precipitation process occurs. Langmuir and Freundlich models were used to describe the adsorption process.

scholarly journals Manganese Ions Removal from Industrial Wastewater

2020 ◽  
Vol 71 (7) ◽  
pp. 391-396
Author(s):  
Eugeniu Vasile ◽  
Cristina-Ileana Covaliu ◽  
Oana Stoian ◽  
Gigel Paraschiv ◽  
Ecaterina Matei ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Treatment Process ◽  
Adsorption Process ◽  
Treatment Time ◽  
Correlation Coefficients ◽  
Manganese Ions ◽  
Treatment Efficiency ◽  
Wastewater Treatment Process ◽  
Langmuir And Freundlich Models

In this study the removal of Mn (II) ions from wastewater using magnetite nanomaterial was investigated. Some factors influencing the wastewater treatment process were studied such as: treatment time, pH and the concentration of Mn (II) ions from wastewater. The results showed that using magnetite nanomaterial adsorbent lead to a wastewater treatment efficiency higher than 97%. Langmuir and Freundlich models were applied to describe the adsorption process. The correlation coefficients (R2) showed that both models are applicable to the experimental data obtained.

scholarly journals Removal of lead from aqueous solutions by low cost and waste biosorbents (lemon, bean and artichoke shells)

2020 ◽  
Vol 81 (1) ◽  
pp. 159-169
Author(s):  
Feyza Ergüvenerler ◽  
Şerif Targan ◽  
Vedia Nüket Tirtom
Keyword(s):  
Contact Time ◽  
Adsorption Process ◽  
Low Cost ◽  
Standard Free Energy ◽  
Freundlich Isotherm ◽  
Standard Entropy ◽  
X Ray ◽  
Adsorption Capacities ◽  
Influence Of Ph ◽  
Scanning Electron

Abstract Simple, fast, effective, low cost and waste biosorbents, lemon, bean and artichoke shells, were used to remove lead (II) ions from aqueous solution. The influence of pH, contact time, temperature and lead (II) concentration of the removal process was investigated. The sufficient contact time was deemed 10 minutes for bean and artichoke shells and 60 minutes for lemon shells for Pb(II) ions. The thermodynamic parameters, such as standard free energy (ΔG), standard enthalpy (ΔH), and standard entropy (ΔS) of the adsorption process were calculated as −5.6786, −5.5758, −3.1488 kJmol−1 for ΔG, −7.2791, −20.285, −9.5561 kJ mol−1 for ΔH, −0.00545, −0.05017, −0.02185 kJ mol−1 K−1 for ΔS, respectively, for lemon, artichoke and bean shells. Maximum adsorption capacities of lead (II) were observed as 61.30 mg g−1, 88.5 mg g−1 and 62.81 mg g−1, respectively, for lemon, bean and artichoke shells according to the Freundlich isotherm model at 20 °C. Scanning electron microscope (SEM) and energy-dispersive X-ray detector (EDX) were used to characterize the surface morphology of the adsorbents. Consequently, Pb(II) removal using lemon, bean and artichoke shells would be an effective method for the economic treatment of wastewater.

scholarly journals Magnetic Nanocomposite Material Containing Chitosan Polymer Used in Wastewater Depollution Processes

2021 ◽  
Vol 57 (4) ◽  
pp. 70-76
Author(s):  
Cristina Ileana Covaliu ◽  
Ecaterina Matei ◽  
Oana Stoia ◽  
Gigel Paraschiv
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Nanocomposite Material ◽  
Magnetic Nanocomposite ◽  
Lead Ions ◽  
Treatment Efficiency ◽  
Experimental Conditions ◽  
Nanocomposite Adsorbent ◽  
Chitosan Composite

The aim of this paper was to present the synthesis, characterization and application of the Fe3O4 - chitosan composite as potential adsorbent for removing lead ions from industrial wastewater. The nanocomposite nanomaterial was characterized by XRD and SEM analyzes. The influence of some parameters (pH of wastewater, lead ions concentration and dose of Fe3O4 - chitosan absorbent) upon the efficiency of wastewater treatment were investigated. The Pb (II) ions concentrations in wastewater were 0.5, 1, 1.5 and 2 mg/L. The amounts of Fe3O4 - chitosan nanocomposite adsorbent tested were 0.05, 0.1 and 0.2 g. In some experimental conditions, Fe3O4 - chitosan nanocomposite adsorbent leaded to obtaining of 100% wastewater treatment efficiency.

scholarly journals Optimized Sorption of Methyl Orange using Functionalized Carob Plant Pod

2020 ◽  
Vol 45 (6) ◽  
Author(s):  
K. A. ABDULSALAM ◽  
B. H. Amodu ◽  
O. K. Fakorede ◽  
J. M. Adelowo ◽  
A. P. Onifade ◽  
...  
Keyword(s):  
Contact Time ◽  
Industrial Wastewater ◽  
Adsorption Process ◽  
Dye Adsorption ◽  
Operational Parameters ◽  
Colour Removal ◽  
Adsorbent Dosage ◽  
Percentage Removal ◽  
Central Composite ◽  
Maximum Decolorization

One of the most problematic groups of water pollutants is dye, a main constituent of textile industrial wastewater, which is carcinogenic. Therefore, this research delved into adsorption of dyes from textiles and wastewater using acid-treated as an adsorbent. The adsorbent was prepared by functionalizing the pod of carob with concentrated H3PO4. The effects of operational parameters such as adsorbent dosage, contact time, initial concentration of dye and temperature were studied and optimized using central composite design of design of experiment (DOE). The effects of process parameters (contact time, concentration, adsorbent dosage and temperature) on the dye adsorption were determined and optimized. It was observed that the colour removal efficiency increased with an increase in adsorbent mass and contact time. The adsorption process is endothermic as the percentage removal increases with temperature. The optimum contact time, concentration, adsorbent dosage and temperature were found to be 60oC, 9.74hr, 10ppm, and 5g respectively for the maximum decolorization.

scholarly journals Using Phragmites australis(Iraqi plant) to remove the Lead (II) Ions form Aqueous solution.

2017 ◽  
Vol 14 (1) ◽  
pp. 148-156
Author(s):  
Baghdad Science Journal
Keyword(s):  
Contact Time ◽  
Industrial Wastewater ◽  
Cost Effective ◽  
Lead Ions ◽  
Slow Process ◽  
Adsorption Parameters ◽  
Adsorption Processes ◽  
Optimized Conditions ◽  
Adsorbent Particle ◽  
Adsorbent Dose

Lead remediation was achieved using simple cost, effective and eco-friendly way from industrial wastewater. Phragmitesaustralis (P.a) (Iraqi plant), was used as anovel biomaterial to remove lead ions from synthesized waste water. Different parameters which affected on adsorption processes were investigated like adsorbent dose, pH, contact time, and adsorbent particle size, to reach the optimized conditions (maximum adsorption). The adsorption of Pb (?) on (P.a) involved fast and slow process as a mechanism steps according to obey two theoretical adsorption isotherms; Langmuir and Freundlich. The thermos dynamic adsorption parameters were evaluated also. The (?H) obtained positive value that meanes adsorption of lead ions was an endothermic processwhile (?G)values were negative which means that adsorption of lead ions was a spontaneous process and the decrease in (?G) with temperature increasing revealed that lead ions adsorption on (P.a) became favorable with temperature increasing

Use of Fly Ash in the Removal of Copper, Nickel and Zinc from Wastewater

1993 ◽  
Vol 28 (2) ◽  
pp. 369-384 ◽  
Author(s):  
T. Viraraghavan ◽  
Murali M. Dronamraju
Keyword(s):  
Fly Ash ◽  
Thermodynamic Parameters ◽  
Contact Time ◽  
Adsorption Process ◽  
Initial Concentration ◽  
Copper Nickel ◽  
Adsorption Data ◽  
Ph Range ◽  
Langmuir And Freundlich Models

Abstract The effectiveness of fly ash in adsorbing copper, nickel and zinc was studied by conducting batch kinetic and isotherm studies. The effect of contact time, pH, initial concentration of the adsorbate, and temperature on the adsorption process was studied. Fly ash was found to be an effective adsorbent. The contact time necessary to attain equilibrium was found to be two hours. Maximum adsorption occurred in the pH range of 3.0 to 3.5. The Langmuir and Freundlich models were found to be applicable to the adsorption data of copper, nickel and zinc. Thermodynamic parameters suggested the exothermic nature of the adsorption process.

scholarly journals Chromium (VI) removal from aqueous solutions using Eichhornia as an adsorbent

2016 ◽  
Vol 7 (4) ◽  
pp. 461-467 ◽  
Author(s):  
Neetu Rani ◽  
Bhupender Singh ◽  
Tuisem Shimrah
Keyword(s):  
Contact Time ◽  
Industrial Wastewater ◽  
Eichhornia Crassipes ◽  
Room Temperature ◽  
Adsorption Process ◽  
Batch Process ◽  
Optimum Dose ◽  
First Order ◽  
Chromium Vi ◽  
Optimum Ph

The study was carried out to check the potential of water hyacinth, Eichhornia crassipes, to remove chromium (VI) in batch process. Powder was prepared from dried Eichhornia (particle size 0.3 mm and 1.0 mm). The influence of various parameters on adsorption (pH, dose, contact time, temperature) was studied. The Cr(VI) removal was 60.9% and 79.2% for 1.00 mm and 0.3 mm particles of Eichhornia treated (ET) after 30 min contact time and 52.7% and 53.4% for 1.00 mm and 0.3 mm particles of Eichhornia untreated (EU) after 75 min contact time respectively. The optimum pH for both adsorbents was found to be 2.0 and optimum dose was found to be 0.4 g 100 ml−1 for ET and 0.6 g 100 ml−1 for EU. Maximum adsorption occurred at room temperature (26 ± 1°C) in case of both ET and EU, respectively. The adsorption process followed the first order mechanism as well as the Langmuir isotherm. Finally, it was concluded that the adsorbent prepared from Eichhornia is very effective in removing Cr(VI) and it can be used for industrial wastewater treatment.

scholarly journals Biosorption of lead (II) ion from aqueous solution using dum palm kernel

2015 ◽  
Vol 4 (2) ◽  
pp. 68-75
Author(s):  
Babagana Gutti ◽  
Habu Mohammed Iyodo ◽  
Umar Abdullahi Isah
Keyword(s):  
Contact Time ◽  
Industrial Wastewater ◽  
Palm Kernel ◽  
Lead Ions ◽  
Lead Ion ◽  
Contaminated Water ◽  
Experimental Limit ◽  
Ion Removal ◽  
Lead Ion Removal ◽  
Regression Correlation

Biosorption of the lead ions from aqueous solutions using dum palm kernel was studied, the lead ion removal depends on the contact time, pH and adsorbent dosage. The optimum contact time, pH and adsorbent mass with in the experimental limit of this work were 100 minutes, 6-7, and 2.5g/L respectively. The maximum percentage of lead ions removed was 87%. The data fitted well with Temkin and Langmuir models, the regression correlation were obtained to be 0.9660 and 0.8667, respectively. The biosorbent may be economical if developed further for industrial wastewater and natural contaminated water treatment. DOI: http://dx.doi.org/10.3126/ije.v4i2.12625 International Journal of Environment Vol.4(2) 2015: 68-75

scholarly journals PENGARUH VARIASI pH DAN BERAT ADSORBEN DALAM PENGURANGAN KONSENTRASI Cr TOTAL PADA LIMBAH ARTIFISIAL MENGGUNAKAN ADSORBEN AMPAS DAUN TEH

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Nurafriyanti Nurafriyanti ◽  
Nopi Stiyati Prihatini ◽  
Isna Syauqiah
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Adsorption Process ◽  
Metal Reduction ◽  
Tea Leaves ◽  
Batch Method ◽  
Natural Adsorbent ◽  
Independent Variable ◽  
Cr Concentration ◽  
Influence Of Ph

Salah satu penyebab pencemaran lingkungan adalah logam berat. Krom merupakan salah satu parameter logam berat pencemar lingkungan. Oleh karena itu harus dilakukan reduksi logam krom, salah satunya dengan proses adsorpsi. Adsorpsi bisa dilakukan dengan menggunakan adsorben alami. Salah satu potensi adsorben alami yang bisa didapatkan di Kalimantan Selatan adalah ampas daun teh. Penelitian ini bertujuan menganalisis pengaruh variasi pH dan berat adsorben dalam pengurangan Cr total pada limbah cair artifisial serta menganalisis efisiensi  pengurangan Cr total dan kapasitas adsorpsi dengan menggunakan adsorben dari ampas daun teh. Sebelum proses adsorpsi dilakukan, adsorben diaktivasi  menggunakan NaOH 4%. Selanjutnya proses adsorpsi dilakukan dengan menggunakan metode batch. Variabel bebas pH (4,5,6,7,8) , berat adsorben sebanyak 0,4 ; 0,6 ; 0,8; 1,0 gram dengan waktu kontak 45 menit. Kecepatan pengadukan 120 rpm dan konsentrasi Cr total sebesar 10 ppm. Hasil penelitian menunjukan penurunan Cr total terbesar terjadi pada pH 4 dan pada berat 0,4 gram. Efisiensi penyerapan Cr terbesar terjadi pada larutan  pH 4 sebanyak 13,18% dan kapasitas adsorpsi sebanyak 0,06 mg/g. Efisiensi dan kapasitas adsorpsi terbesar terjadi pada berat 0,4 gram adalah 12,11% dan 0,06 mg/g.Kata Kunci: Adsorpsi, Cr total, ampas daun teh, efisiensi, kapasitas adsorpsi  One of the causes of environmental pollution is heavy metals. Chromium is one of the parameters of heavy metal polluters. Therefore, chromium metal reduction must be done, one way to do it is with adsorption process . Adsorption can be done using natural adsorbent. One of the potential natural adsorbent which can be found in South Kalimantan is the dregs of tea leaves. This study aims to analyze the influence of pH and adsorbent weight in the reduction of total Cr in artificial wastewater and analyze the efficiency and the reduction of Cr total adsorption capacity by using adsorbents from the dregs of the tea leaves. Before the adsorption process is executed, the adsorbent was chemically activated using 4% NaOH. Furthermore, the adsorption process is done by using the batch method. The independent variable pH (4,5,6,7,8), the weight of the adsorbent as much as 0.4; 0.6; 0.8; 1.0 grams in 45 minutes contact time. Stirring speed of 120 rpm and total Cr concentration of 10 ppm. The results showed that the largest decrease of total Cr achieved at pH 4 and 0.4 gram of weight. The largest Cr adsorption at pH 4 solution is 13.18% and adsorption capacity at 0.06 mg/g. The largest efficiency and capacity achieved at 0.4 gram of weight is 12.11% and 0.06 mg/g

REMOVAL OF LEAD IONS FROM INDUSTRIAL WASTEWATER USING PRECIPITATION PROCESS

2017 ◽  
Vol 16 (7) ◽  
pp. 1563-1568 ◽  
Author(s):  
Habib Karimi ◽  
Mehraban Sadeghi ◽  
Moluk Hadi Alijanvand
Keyword(s):  
Industrial Wastewater ◽  
Lead Ions ◽  
Precipitation Process
Sign in / Sign up

Export Citation Format

Share Document