scholarly journals EFISIENSI PENYERAPAN LOGAM Pb2+ DENGAN MENGGUNAKAN CAMPURAN BENTONIT DAN ENCENG GONDOK

2015 ◽  
Vol 4 (1) ◽  
pp. 20-24 ◽  
Author(s):  
M. Faisal
Keyword(s):  
Water Hyacinth ◽  
Contact Time ◽  
Adsorption Process ◽  
Adsorption Efficiency ◽  
Adsorption Ability ◽  
Adsorption Time

Adsorption of Pb2+by  using a mix of bentonite and water hyacinth has been carried out in a  bacth system. The purpose of the research is to investigate  the abilty of  the mix bentonite and water hyacinth to adsorp Pb2+. Prior to adsorption process, the mix of bentonite and water hyacnth was activated physcally by H2SO4. The adsorption ability between activated-adsorbend and without activated-adsorbend was then compared. In the activaved process, the mix of bentonite and water hyacinth used was 4 gram in weight  and 120 ml of H2SO4 1,2 M. In this research, adsorption time of 30, 60, 120 menit, the speed of 50, 100, 150 rpm and the Pb2+concentration of  30, 35 and 40 mg/l were used. The result showed that the adsorption efficiency of activated-adsorbend is higher than that of without activaved. The maximum adsorption of 0,987 mg/g were obtained at Pb2+concentration of 40 mg/l with a contact time and speed of 120 min and 150 rpm, respetively.

Desorption of Mercury Complex from Fe-Modified Montmorillonite Adsorbent Membrane

2019 ◽  
Vol 814 ◽  
pp. 451-456 ◽  
Author(s):  
Marjorie Jane Lodo ◽  
Leslie Joy L. Diaz
Keyword(s):  
Contact Time ◽  
Environmental Remediation ◽  
Adsorption Process ◽  
Batch Adsorption ◽  
Adsorption Efficiency ◽  
Sem Images ◽  
Modified Montmorillonite ◽  
Subsequent Elution ◽  
Mining Wastewater ◽  
Cyanide Solutions

With the use of nanotechnology, clay minerals, specifically montmorillonites, have been reengineered to be used in environmental remediation, especially in the treatment of mining wastewater containing hazardous heavy metal ions. The objective of this study is to assess the practicality of using iron-modified montmorillonite (Fe-MMT) nanomembranes in the removal of mercury using the adsorption process. The nanomembranes, which were synthesized via electrospinning, were subjected to mercury cyanide solutions during the batch adsorption set ups to determine the adsorption efficiency. During the subsequent elution tests, three factors– eluent type (CH3COOH and C6H807), eluent concentration (0.01 M and 0.05 M) and contact time (3 and 5 hours) – were tested. SEM images of the mats were acquired to study the structure of the adsorbent. HD XRF analysis was done to identify the ions present in the membrane, as well as the initial Hg concentrations, amount of remaining Hg in the wastewater after batch adsorption and amount of desorbed metal. Results showed that using the Fe-MMT nanomembrane as adsorbent material resulted to 61.74% removal of Hg in the mercury cyanide solutions with initial concentrations of 13.87 to 38.9 mg L-1. Acetic acid exhibited better desorption results, with the highest efficiency of 31.36% (0.01 M, 5 h) compared to citric acid’s 7.40% (0.05M, 3 h).

scholarly journals Removal of Zn (II) and Cu (II) Ions from Industrial Wastewaters Using Magnetic Biochar Derived from Water Hyacinth

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Benias C. Nyamunda ◽  
Terrence Chivhanga ◽  
Upenyu Guyo ◽  
Fidelis Chigondo
Keyword(s):  
Water Hyacinth ◽  
Contact Time ◽  
Metal Ion ◽  
Adsorption Process ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Batch Adsorption ◽  
Magnetic Biochar ◽  
Metal Ion Removal ◽  
High Sorption

This study evaluates the effectiveness of magnetic biochar (Fe2O3-EC) derived from water hyacinth in the removal of Cu+2 and Zn+2 from aqueous solution. Fe2O3-EC was prepared by chemical coprecipitation of a mixture of FeCl2 and FeCl3 on water hyacinth biomass followed by pyrolysis. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDX). Batch adsorption studies on the effects of temperature, biosorbent dosage, contact time, and initial metal ion concentration were carried out. Fe2O3-EC exhibited optimum contact time, biosorbent dosage, and pH values of 65 min, 1.2 g, and 6, respectively. Fe2O3-EC exhibited strong magnetic separation ability and high sorption capability. Metal ion adsorption onto the biochar conformed to the Langmuir isotherm. Kinetic studies revealed that the adsorption process followed pseudo-second-order model. The calculated thermodynamic parameters showed that the adsorption process was feasible and exothermic in nature. These results have demonstrated that the use of Fe2O3-EC in metal ion removal could provide an alternative way to manage and utilize this highly problematic invasive species.

Adsorption of Chromium in Aqueous Solution by Using Zeolite A Prepared from Fly Ash

2018 ◽  
Vol 792 ◽  
pp. 140-144
Author(s):  
Jumaeri ◽  
Eko Sri Kunarti
Keyword(s):  
Aqueous Solution ◽  
Fly Ash ◽  
Contact Time ◽  
Direct Contact ◽  
Adsorption Process ◽  
Coal Fly Ash ◽  
Hydrothermal Process ◽  
Zeolite A ◽  
Adsorption Ability ◽  
Ph Conditions

Adsorption of Cr(III) and Cr(VI) in aqueous solution by the zeolite A from coal fly ash at various conditions has been carried out. Zeolite A was synthesized from fly ash through modified alkaline fusion hydrothermal process in a reactor stainless steel. Adsorption is carried out by direct contact between the adsorbent and adsorbate in an adsorption batch. Zeolite A from fly ash (ZA-FA) of 0.01 g was mixed with 20 mL both Cr(III) and Cr(VI) at various pH, contact time and initial concentration, in a flask Erlenmeyer 50 mL. The result showed that pH conditions of adsorption process, affect the adsorption ability of zeolite A to Cr(III) and Cr(VI) in aqueous solution. The adsorption of Cr(III) and Cr(VI) on zeolite A reached a maximum at pH 6 and time contact 120 minutes. The adsorption of Cr(III) on zeolite A increased from 3.4 mg/g at pH 3 and achieved a maximum adsorption of 42.67 mg/g at pH 6. At higher pH (7-8) the Cr(III) adsorption tends decreases. The adsorption ability of ZA-FA to Cr(III) is higher than that of Cr(VI) in aqueous solution. The Cr(III) adsorption process on ZA-FA follows the pseudo-order 2 kinetics model.

scholarly journals Adsorption of Some Alephatic Dicarboxylic Acids on Zinc Oxide: A kinetic and Thermodynamic Study

2019 ◽  
Vol 16 (4) ◽  
pp. 0892
Author(s):  
Saddam M. Al-Mahmoud
Keyword(s):  
Zinc Oxide ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Adsorption Process ◽  
Dicarboxylic Acids ◽  
Second Order ◽  
Oxide Surface ◽  
Adsorption Efficiency ◽  
Good Ability ◽  
Pseudo Second Order

The adsorption of Malonic acid, Succinic acid, Adipic acid, and Azelaic acid from their aqueous solutions on zinc oxide surface were investigated. The adsorption efficiency was investigated using various factors such as adsorbent amount, contact time, initial concentration, and temperature. Optimum conditions for acids removal from its aqueous solutions were found to be adsorbent dose (0.2 g), equilibrium contact time (40 minutes), initial acids concentration (0.005 M). Variation of temperature as a function of adsorption efficiency showed that increasing the temperature would result in decreasing the adsorption ability. Kinetic modeling by applying the pseudo-second order model can provide a better fit of the data with a greater correlation coefficient, which indicates that the adsorption process follow the pseudo-second order kinetics. The negative values of Gibbs free energy and the enthalpy change confirm the spontaneous and exothermic nature of the adsorption process. A good ability of zinc oxide to remove aliphatic dicarboxylic acids from its aqueous solutions has been found, and the chain length of the acids has no significant effect on its adsorption.

scholarly journals Enhancing lead adsorption in waste lubricant oil with activated clay as bleaching earth

2019 ◽  
Vol 276 ◽  
pp. 06020
Author(s):  
Dini Kemala ◽  
Setyo Sarwanto Moersidik ◽  
Sandyanto Adityosulindro ◽  
Firsta Hilwa
Keyword(s):  
Contact Time ◽  
Adsorption Process ◽  
Bleaching Earth ◽  
Lead Removal ◽  
Adsorption Efficiency ◽  
Lead Adsorption ◽  
Lubricant Oil ◽  
Adsorption Condition ◽  
Polycyclic Aromatic ◽  
Waste Lubricant Oil

Waste lubricant oil is categorized as hazardous waste that contains several contaminants such as polycyclic aromatic hydrocarbon, chlorinated hydrocarbon, and heavy metals. Among these contaminants, lead has been known as one of the contributive contaminants in used lubricant oil in varied concentrations. To remove this contaminant, adsorption process was carried out by using clay as natural adsorbent (bleaching earth). In order to enhance the adsorption efficiency, the clay was activated by acidification with 1 M, 1.5M, 2 M H2SO4 or calcination in the temperature 300°C, 450°C, 600°C. The activated clay indicated the increase of montmorillonite percentage in clay up to 68% and clay’s surface area up to 67 m2/g from its origin characteristics. The adsorption process showed notable improvement of clay adsorption capacity in removing lead in shorter contact time. The lead removal curve showed that the optimum adsorption condition can be obtained by the use of activated clay with 1.5 M H2SO4 and calcined in temperature 450°C. The optimum adsorption contact time with acid and calcination activated clay was 30 minutes and 180 minutes respectively.

scholarly journals STUDI KINETIKA ADSORPSI ION Fe (III) MENGGUNAKAN LIMBAH AMPAS SAGU

2019 ◽  
Vol 9 (1) ◽  
pp. 9-17
Author(s):  
Batseba Taihuttu ◽  
V Kayadoe ◽  
A Mariwy
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Heavy Metal Ions ◽  
Adsorption Process ◽  
Second Order ◽  
Adsorption Efficiency ◽  
Adsorption Study ◽  
Pseudo Second Order

Adsorption study of the adsorption of heavy metal ions from Fe (III) using sago dregs waste was carried out. adsorption was carried out in batches, with the mass of adsorbent is 1 g and the concentration of Fe (III) ion is 10 ppm. in this study variations in contact time were 60, 90, 120, 150 and 180 minutes to determine the kinetic suitable for the adsorption process of ion Fe (III) and the capacity and efficiency of sago dregs adsorption. The results showed that the adsorption of ion fe (III) using sago dregs followed pseudo second-order kinetics with R2 values that were closer to 1 that is 0,9651. adsorption of ion Fe (III) at optimum contact time of 90 minutes with adsorbent mass of 1 g obtained by adsorption capacity 0,3211 mg/g and the adsorption efficiency is 64,2%.

scholarly journals Adsorben Magnetit Terlapis Dimerkaptosilika untuk Adsorpsi Anion Logam [AuCl4]- dan [Cr2O7]-

2020 ◽  
Vol 11 (2) ◽  
pp. 113-120
Author(s):  
Ngatijo Ngatijo ◽  
Diah Riski Gusti ◽  
Abdurrazaq Habib Fadhilah ◽  
Resilta Khairunnisah
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Adsorption Process ◽  
Adsorption Efficiency ◽  
Optimum Conditions ◽  
Metal Anion ◽  
Metal Anions

Adsorbent magnetite-dimercapto-silica (Fe3O4 - DMS) is a synthesis of magnetite with 2,3-dimercapto-1-propanol which has been applied to adsorb anions [AuCl4] - and [Cr2O7]-2. The adsorption process of metal anion [AuCl4]- at pH 5 with a contact time of 100 minutes was found optimum results at an adsorption capacity of 77.58 mg/g and an adsorption efficiency value of 96.975%. While the optimum conditions of metal anion [Cr2O7]-2 after the adsorption process at pH 4 with a contact time of 90 minutes was found an adsorption capacity of 85.0426 mg/g and an adsorption efficiency value of 85.0426%. The adsorption efficiency of metal anions [AuCl4]- is higher than the adsorption efficiency of metal anions [Cr2O7] -2 

scholarly journals Optimization Study of Adsorption Parameter for Removal of Dye Pollutant Using Candle Soot Coated Egg Carton

2021 ◽  
Vol 945 (1) ◽  
pp. 012012
Author(s):  
Yong Kee Tai ◽  
Lan Ching Sim ◽  
Kah Hon Leong ◽  
Pichiah Saravanan
Keyword(s):  
Optimum Condition ◽  
Optimal Condition ◽  
Contact Time ◽  
Adsorption Process ◽  
Adsorption Efficiency ◽  
Candle Soot ◽  
Analysis Process ◽  
Optimization Study ◽  
Initial Ph ◽  
Central Composite

Abstract In this study, several parameters that affect the adsorption capacity of Rhodamine B (RhB) dyes were reviewed which include initial pH, temperature, contact time and initial dye concentration. Experimental data was extracted from other literatures as input for subsequent optimization study. Design Expert version 11.1.2.0 software was used to find the optimal condition for adsorption of RhB dyes from wastewater by using candle soot coated on egg carton (CS-Egg) as absorbent. The Central Composite Design (CCD) in response surface methodology (RSM) was employed to perform the optimization and analysis process as it was effective in determining the optimal condition for the adsorption process. CCD evaluated many parameters at the same time and thus reducing the number of experiments required. The optimum condition to maximize the adsorption efficiency was obtained at pH 7, 262.5 mg/L, 60 min of contact time and 55 °C. The highest predicted adsorption efficiency of RhB dye was 90 % at optimum condition. The optimization of parameter provides a better understanding on the adsorption efficiency before conducting the actual experimental work.

scholarly journals Removal of Heavy Metals from Textile Wastewater Using Sugarcane Bagasse Activated Carbon

2018 ◽  
Vol 7 (4.30) ◽  
pp. 112 ◽  
Author(s):  
Mohd Adib Mohammad Razi ◽  
Adel Al- Gheethi ◽  
Izzatul Ashikin ZA
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Metal Ions ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Adsorption Process ◽  
Textile Wastewater ◽  
Attractive Alternative ◽  
Adsorption Efficiency ◽  
Adsorbent Dosage

Excessive release of textile wastewater with heavy metals into environment has posed a great problem to the natural water system. The efficiency of the adsorption process to remove heavy metals depend on the adsorbent. The commercial activated carbon is one of the most efficient adsorbent, but the limitation lies in the high cost. Therefore, the present study aimed to investigate the efficiency of sugarcane bagasse activated carbon modified by phosphoric acid as adsorbent for the removal of zinc (Zn) and Ferum (Fe) from the textile wastewater. The adsorption process was conducted using batch method as a function for pH (2-7), contact time (30 min to 24 h) and adsorbent dosage (0.6 to 6g). The final concentrations of the metal ions were determined by ICP-MS. The results revealed that the adsorption efficiency increased with the contact time, the optimum time was recorded after 2 h. The removal percentage of Zn and Fe associated with the adsorbent dosage due to the greater surface area with optimum value of 4.0 g. The increasing of pH from 2 to 6 correlated with high adsorption efficiency, with the optimum condition at pH 5. The maximum percentage removal of Fe, Zn was 80%. These findings indicated that the SBAC is an attractive alternative adsorbent material for the metal ions removal in textile wastewater.

scholarly journals Removal of nitrobenzene from water using activated carbon prepared from water hyacinth

2021 ◽  
Vol 1197 (1) ◽  
pp. 012063
Author(s):  
R Prithvi ◽  
A Aravindan ◽  
K Naga Chaitanya
Keyword(s):  
High Performance Liquid Chromatography ◽  
Activated Carbon ◽  
Water Hyacinth ◽  
Contact Time ◽  
High Performance ◽  
Acid Activation ◽  
Adsorption Efficiency ◽  
Initial Concentration ◽  
Phosphoric Acid Activation ◽  
The Stability

Abstract The prevailing study is of the adsorption efficiency of nitrobenzene onto the activated carbon prepared from the water hyacinth by phosphoric acid activation under the considerations of effect of pH (2,4,6,8,10 and 12) of nitrobenzene sample and consequence of initial concentration (20,100 and 200mg L−1) and contact time. The samples were analysed in high performance liquid chromatography (HPLC). The outcome shows that the change in pH of the nitrobenzene sample does not impact the adsorption capacity or adsorption rate. But whereas, the increase in original concentration of nitrobenzene has shown that the adsorption of nitrobenzene was rapid at initial stages and gradually increased with time till the stability is reached with the adsorption values of 19.3, 84.7 and 158.3 for initial concentrations of 20,100 and 200mg g−1 respectively. This study indicates that activated carbon formulated from water hyacinth is efficient for the removal of the nitrobenzene from the water.

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