Theoretical study on the adsorption ability of (ZnO)6 cluster for dimethylmercury removal and the influences of the supports and other ions in the adsorption process

Adsorption ◽  
2020 ◽  
Vol 26 (8) ◽  
pp. 1335-1344
Author(s):  
Thi Thu Ha Nguyen ◽  
Minh Cam Le ◽  
Zhong-Tao Jiang ◽  
Ngoc Ha Nguyen
Keyword(s):  
Adsorption Process ◽  
Theoretical Study ◽  
Adsorption Ability

scholarly journals A theoretical study on the adsorption of dichlorodiphenyltrichloroethane (DDT) on graphitic carbon nitride (g-C3N4) and g-C3N4 modified with cluster Ni2

2021 ◽  
Vol 10 (3) ◽  
pp. 58-64
Author(s):  
Be Pham Thi ◽  
Ha Nguyen Thi Thu ◽  
Ha Nguyen Ngoc
Keyword(s):  
Carbon Nitride ◽  
Adsorption Process ◽  
Theoretical Study ◽  
Tight Binding ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Bond Orders ◽  
Adsorption Ability ◽  
Enhanced Adsorption ◽  
Nickel Cluster

A robust and accurate tight-binding quantum chemical method was performed to study adsorption process of dichlorodiphenyltrichloroethane (DDT) on graphitic carbon nitride (g-C3N4) and  g-C3N4 modified with nickel cluster (Ni2). The adsorption energy, charges on atoms, bond orders have been calculated and analysed. The obtained results indicate that the adsorption of DDT on the pristine g-C3N4 is physical of nature. Ni2 cluster can be easily doped on g-C3N4 due to the formation of chemical bonds. The Ni2-g-C3N4 system exhibits enhanced adsorption ability for DDT.

scholarly journals Utilization of Lapindo Volcanic Mud for Enhanced Sono-sorption Removal of Acid Orange 52

2019 ◽  
Vol 14 (1) ◽  
pp. 189
Author(s):  
Nur Hidayatul Nazirah Kamarudin ◽  
Herma Dina Setiabudi ◽  
Aishah Abdul Jalil ◽  
Siti Hazirah Adam ◽  
Nur Fatien Muhamad Salleh
Keyword(s):  
Adsorption Process ◽  
Order Equation ◽  
Reaction Engineering ◽  
Adsorption Method ◽  
Adsorption Ability ◽  
Acid Orange ◽  
Isotherm Study ◽  
Sorption Method ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order

This study applied ultrasonic irradiation technique to remove acid orange 52 (AO52) and in the meantime utilizing the potential adsorbent, Lapindo volcanic mud (LVM). LVM was collected from the erupted mud in Sidoarjo, Indonesia and calcined prior the adsorption process. Previously in another study, Lapindo was proven to be efficient for adsorption of dyes in single adsorption method. In this study, the combination of adsorption with ultrasound, or as known as sono-sorption shows that the adsorptivity increased from 95.54 mg/g to 129.5 mg/g. The isotherm study shows that this process obeyed Langmuir isotherm model with adsorption capacity of 833.33 mg/g. The enhancement of sono-sorption method as compared to conventional method is believed to be resulted from the facilitated mass transfer driven by the ultrasound, along with the adsorption ability of LVM. The kinetic study fit to the pseudo second order equation. Copyright © 2019 BCREC Group. All rights reservedReceived: 1st October 2018; Revised: 22nd December 2018; Accepted: 7th January 2019; Available online: 25th January 2019; Published regularly: April 2019How to Cite: Kamarudin, N.H.N., Setiabudi, H.D., Jalil, A.A., Adam, S.H., Salleh, N.F.M. (2019). Utilization of Lapindo Volcanic Mud for Enhanced Sono-sorption Removal of Acid Orange 52. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (1): 189-195 (doi:10.9767/bcrec.14.1.3326.189-195)Permalink/DOI: https://doi.org/10.9767/bcrec.14.1.3326.189-195  

Kinetic and Thermodynamic Study Adsorbing Methylene Blue on Nanozirconia

2013 ◽  
Vol 475-476 ◽  
pp. 1311-1319
Author(s):  
Ping Hua Chen ◽  
Xue Zhen Zhou ◽  
Yong Xiu Li ◽  
Dong Ping Li ◽  
Jing Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Thermodynamic Properties ◽  
Adsorption Process ◽  
Sorption Process ◽  
Kinetic Properties ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Methylene Blue Adsorption ◽  
Influence Of Temperature ◽  
Kinetic And Thermodynamic Study

In present study, uniformed nanozirconia is obtained via precipitation, ball milling and spray drying. The characteristics of methylene blue adsorption by nanozirconia are studied in details. The morphology of nanozirconia is examined by SEM. The influence of temperature is studied to obtain the optimal adsorption conditions. The equilibrium adsorption isotherms and the kinetic properties of the adsorption process are investigated to study the mechanism. The thermodynamic properties of methylene blue adsorption is investigated, and the thermodynamic parameters of Gθ, Hθ and Sθ are calculated. The results show nanozirconia has high adsorption ability of 43.99 mg/g to methylene blue, and the adsorption reaction is a spontaneous and physic-sorption process.

Experimental and Theoretical Study to Understand the Adsorption Process of p‐Anisidine and 4‐Nitroaniline for the Dissolution of C38 Carbon Steel in 1M HCl

2022 ◽  
Vol 7 (2) ◽  
Author(s):  
Mohamed Damej ◽  
Abdu Molhi ◽  
Kawtar Tassaoui ◽  
Brahim El Ibrahimi ◽  
Zahra Akounach ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Adsorption Process ◽  
Theoretical Study

Preparation of bio-based magnetic adsorbent and application for efficient removal of Cd(II) from water

2018 ◽  
Vol 77 (5) ◽  
pp. 1313-1323 ◽  
Author(s):  
Jianjun Zhou ◽  
Xionghui Ji ◽  
Xiaohui Zhou ◽  
Jialin Ren ◽  
Yaochi Liu
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Low Cost ◽  
Maximum Adsorption Capacity ◽  
Magnetic Adsorbent ◽  
Order Model ◽  
Efficient Removal ◽  
Adsorption Ability ◽  
Adsorption Sites ◽  
Pseudo Second Order

Abstract A novel magnetic bio-adsorbent (MCIA) was developed, characterized and tested for its Cd(II) removal from aqueous solution. MCIA could be easily separated from the solution after equilibrium adsorption due to its super-paramagnetic property. The functional and magnetic bio-material was an attractive adsorbent for the removal of Cd(II) from aqueous solution owing to the abundant adsorption sites, amino-group and oxygen-containing groups on the surface of Cyclosorus interruptus. The experimental results indicated that the MCIA exhibited excellent adsorption ability and the adsorption process was spontaneous and endothermic. The adsorption isotherm was consistent with the Langmuir model. The adsorption kinetic fitted the pseudo-second-order model very well. The maximum adsorption capacity of Cd(II) onto MCIA was 40.8, 49.4, 54.6 and 56.6 mg/g at 293, 303, 313 and 323 K, respectively. And the MCIA exhibited an excellent reusability and impressive regeneration. Therefore, MCIA could serve as a sustainable, efficient and low-cost magnetic adsorbent for Cd(II) removal from aqueous solution.

scholarly journals Hydrogen adsorption capacity using modified nickel-kenaf core at different concentrations

2019 ◽  
Vol 90 ◽  
pp. 02002
Author(s):  
S. N. Ezaty ◽  
N. Zaini ◽  
N. J. Farahhin ◽  
K. S. N. Kamarudin
Keyword(s):  
Adsorption Process ◽  
Hydrogen Adsorption ◽  
Storage System ◽  
Bet Surface Area ◽  
Adsorption Ability ◽  
X Ray ◽  
Delivery Performance ◽  
Hydrogen Storage System ◽  
Physicochemical Characterisation ◽  
Different Levels

In this study, surface chemistry modification of kenaf adsorbent in adsorptive hydrogen storage system was computationally investigated using Brunauer-Emmett-Teller (BET) surface area, thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), and elemental dispersion X-ray (EDX) analysis, in which the suitability of the adsorbent was determined with detailed physicochemical characterisation analysis. The method used for surface modification was metal deposition method using Ni(NO3)2 with various concentrations at different levels of pressure (up to 6 bars). Based on this research, modified kenaf with 0.4 M Ni(NO3)2 and 2.559 m2 g-1 adsorbed up to 1.013 mmol g-1 of hydrogen compared to the raw kenaf with only 0.396 mmol g-1 of hydrogen adsorbed in 5 h. Two consecutive cycles of adsorption were carried out to show the delivery performance of hydrogen adsorptive storage. Thus, different adsorption ability between the modified kenaf and raw kenaf shows that Ni-metal on kenaf surface assists in hydrogen adsorption process.

Study on the Adsorption of Carbonized Micron Wood Fiber Filter for the Nanoparticle Emissions of Diesel Engine

2013 ◽  
Vol 572 ◽  
pp. 221-224
Author(s):  
Dan Feng Du
Keyword(s):  
Diesel Engine ◽  
Adsorption Process ◽  
Low Cost ◽  
Wood Fiber ◽  
Simulation Method ◽  
Number Density ◽  
Adsorption Ability ◽  
Ensemble Monte Carlo ◽  
Bench Experiment ◽  
Grand Canonical

Carbonized Micron Wood Fiber (CMWF) has many merits of high filtration efficiency, low cost, green environmental protection and so on. Besides, it also has the properties of activated carbon, which makes its adsorption ability for nanoparticles emitted by a diesel engine much stronger. In this paper, the adsorption number density of the nonoparticles in the CMWF filter under the different conditions is simulated based on Grand Canonical Ensemble Monte Carlo Method (GCEMC). Moreover, the result of simulation is validated by a engine bench experiment. Theoretical deduction and experiment results both prove the simulation method can be applied to simulate the adsorption process of the nanopaticles.

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.

scholarly journals Carbon Nitride Nanotube as a Chemical Sensor for Melamine: A Theoretical Study

2017 ◽  
Vol 60 (4) ◽  
Author(s):  
Reza Moradi ◽  
Javad Hosseini Hosseini
Keyword(s):  
Density Functional ◽  
Carbon Nitride ◽  
Adsorption Process ◽  
Chemical Sensor ◽  
Theoretical Study ◽  
Tube Wall ◽  
High Sensitivity ◽  
Tube Surface ◽  
Promising Candidate ◽  
Short Recovery Time

The interaction of a melamine molecule with a carbon nitride nanotube (CNNT) was explored by means of dispersion-corrected density functional calculations. It was found that melamine prefers to be adsorbed on the porous site of the tube wall with the adsorption energy of -21.9 kcal/mol. This adsorption process significantly shifts the HOMO of the tube to higher energies, thereby reducing the gap of the tube from 3.97 to 2.65 eV. Moreover, the work function is slightly decreased which can facilitate the field electron emission from the tube surface. It is expected that CNNT can be a promising candidate for sensor devices in detecting the melamine molecule with short recovery time and high sensitivity.

scholarly journals Elimination of Lead Ions from Aqueous Environment by Waste Tires Rubber

2017 ◽  
Vol 2 (2) ◽  
pp. 81-87 ◽  
Author(s):  
Eman Fadhil Nassar ◽  
Dheaa Zageer ◽  
Majid S. Khlaf
Keyword(s):  
Adsorption Process ◽  
Lead Ions ◽  
Aqueous Environment ◽  
Operational Parameters ◽  
Process Data ◽  
Adsorption Ability ◽  
Waste Tire Rubber ◽  
Original Metal ◽  
Adsorbent Particle ◽  
Adsorbent Dose

The investigation goes through paper to taking away of lead ions from aqueous medium by waste tire rubber granules(WTRG). The effect of various operational parameters like period of time, original metal concentration, size of adsorbent particles, adsorbent dose, and PH of medium on the adsorption ability of WTRG was evaluated. The kinetic of the adsorption process was relatively fast with approximately one hour of equilibrium time. A tiny adsorbent particle size (0.04 mm), PH medium (5-6) preferential the adsorption process. Data of isotherm studies exposed that adsorption of Pb(II) was well expressed by the Langmuir isotherm formula (R2=0.993). The study demonstrated the ability of WTRG to remove lead from aqueous environment as a cheap and available material. The use of WTRG exhibited the safe disposal of solid waste. Hence its with double benefit for environment.

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