scholarly journals Using corncob-based biochar to intercept BTEX in stormwater filtration systems

2020 ◽  
Vol 82 (9) ◽  
pp. 1858-1867
Author(s):  
Huannan Wang ◽  
Dandan Yan ◽  
Huan Zeng ◽  
Jiajie He
Keyword(s):  
Adsorption Kinetics ◽  
Driving Force ◽  
Contact Time ◽  
Adsorption Kinetic ◽  
Batch Experiments ◽  
Kinetic Experiment ◽  
Transport Experiment ◽  
Endothermic Process ◽  
Kinetics Of ◽  
Adsorption Capability

Abstract A biochar material made from corncobs was tested for its capability in BTEX adsorption/interception in stormwater filtration systems. Batch experiments were conducted to examine the adsorption kinetics, adsorption isotherms, and adsorption thermodynamics of BTEX onto this biochar. The feasibility of applying this biochar in stormwater filtration was studied by dynamic transport experiments and model simulations. The result showed that this biochar can adsorb BTEX and the adsorption is a thermodynamically spontaneous, and endothermic process. The BTEX adsorption kinetic experiment and adsorption retarded BTEX transport experiment indicated that the BTEX adsorption kinetics can be changed by the driving force between the BTEX concentrations and the active adsorption site as well as the contact time between BTEX and the biochar. In terms of applying this biochar in stormwater filtration, the Monte Carlo uncertainty analysis indicated that the BTEX interception is sensitive to the hydraulic conductivity of the biochar filter and the adsorption kinetics of the biochar material. Although this corncob-made biochar demonstrated effective pollutant adsorption capability, the biochar adsorption capability should be utilized to retain the pollutant long enough for biodegradation to take effect for ultimate pollutant attenuation.

scholarly journals Study of Kinetics and Adsorption Isotherm of Methylene Blue Dye using Tannin Gel from Ceriops tagal

2020 ◽  
Vol 23 (10) ◽  
pp. 370-376
Author(s):  
Thamrin Azis ◽  
La Ode Ahmad ◽  
Keke Awaliyah ◽  
Laode Abdul Kadir
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Contact Time ◽  
Adsorption Process ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Methylene Blue Dye ◽  
Ceriops Tagal ◽  
Kinetics Of

Research on the equilibrium and adsorption kinetics of methylene blue dye using tannin gel from the Tingi tree (Ceriops tagal) has been carried out. This study aims to determine the capacity and adsorption kinetics of tannin gel against methylene blue dye. Several parameters, such as the effect of contact time, pH, and methylene blue dye concentration on adsorption, were also studied. Based on the research results, the optimum adsorption process is a contact time of 30 minutes and a pH of 7. The adsorption capacity increased to a concentration of 80 mg/L with a maximum adsorption capacity (qm) of 49.261 mg/g. The adsorption process follows the pseudo-second-order adsorption kinetics model and the Langmuir isotherm model.

scholarly journals STUDY ON THE ADSORPTION PROPERTIES OF NOVEL CALIX[6]ARENE POLYMERS FOR HEAVY METAL CATIONS

2012 ◽  
Vol 12 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Susy Yunita Prabawati ◽  
Jumina Jumina ◽  
Sri Juari Santosa ◽  
Mustofa Mustofa ◽  
Keisuke Ohto
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Kinetics ◽  
Contact Time ◽  
Adsorption Process ◽  
Metal Cations ◽  
Kinetics Model ◽  
Batch Method ◽  
Heavy Metal Cations ◽  
Kinetics Of

A research has been conducted to investigate the capability of a series of novel calix[6]arenes-based polymers: poly-monoallyloxycalix[6]arene (2a), poly-monoallyloxypenta-estercalix[6]arene (2b) and poly-monoallyloxypenta-acidcalix[6]arene (2c) for trapping of heavy metal cations such as Cd(II), Cu(II) and Cr(III). The existence of active hydroxy group (-OH) and with a tunnel-like structure of the polymers, caused the polymers can be used as adsorbents for heavy metals. The adsorption process was carried out in batch method in the variation of acidity (pH), contact time and initial concentration of metal ions. The results showed that the amount of adsorbed metal increased with the increasing of the pH of metal solution. For these three polymers, the amount of metal ions Cd(II), Cu(II) and Cr(III) adsorbed was optimum at pH 7, 6 and 5 respectively. The optimum contact time for Cd(II) and Cu(II) was 120 min, while that for Cr(III) was 60 min. Study of the adsorption kinetics showed that the adsorption of Cd(II), Cu(II) and Cr(III) using polymer 2a followed kinetics model of Ho. For adsorbent 2b and 2c, the adsorption kinetics of Cd(II) and Cr(III) also followed kinetics model of Ho while for the Cu(II) followed Lagergren kinetic models. Isothermal studies showed that the adsorption of metal ions on all adsorbents tend to follow the Langmuir isotherm. The adsorption energies of the three adsorbents were higher than 23 kJ/mole and polymer 2c has the largest adsorption capacity for Cr(III).

Kinetic Study of the Adsorption of Dye onto Cotton in SDS-CTAB Reverse Micelles

2015 ◽  
Vol 723 ◽  
pp. 591-595
Author(s):  
Zu Lan Liu ◽  
Lan Qian Li ◽  
Yi Ping Liu ◽  
Ming Lu
Keyword(s):  
Kinetic Study ◽  
Adsorption Kinetics ◽  
Reverse Micelles ◽  
Adsorption Kinetic ◽  
Order Kinetic ◽  
First Order ◽  
Reactive Blue 19 ◽  
Order Kinetic Model ◽  
Pseudo First Order ◽  
Kinetics Of

Adsorption kinetic study of C.I. reactive blue 19 onto cotton was carried out in SDS-CTAB reverse micelles. The data of adsorption kinetics were examined using pseudo first-and second-order kinetic models. It was found that the adsorption kinetics of dye on cotton with diffusion controlling follows the pseudo first-order kinetic model.

Adsorption of Pb2+ in Wastewater Using Adsorbent Derived from Grapefruit Peel

2011 ◽  
Vol 391-392 ◽  
pp. 968-972 ◽  
Author(s):  
Yuan Yuan Pei ◽  
Jing Yong Liu
Keyword(s):  
Adsorption Kinetics ◽  
Contact Time ◽  
Removal Rate ◽  
Ion Concentration ◽  
Affecting Factors ◽  
Solution Ph ◽  
Isothermal Adsorption ◽  
Grapefruit Peel ◽  
Pseudo Second Order ◽  
Kinetics Of

The adsorbent was prepared from Grapefruit peel by activation with ZnCl2. Grapefruit peel adsorbent (GPA) was employed to be as adsorbent to remove Pb(Ⅱ) in wastewater. The affecting factors on the adsorption of Pb(Ⅱ)from aqueous solution with GPA, such as solution pH, contact time, GPA dosage, initial Pb(Ⅱ) concentration, and reaction temperature were investigated. Adsorption kinetics and adsorption mechanism were investigated also. The results showed that the factors mentioned above have remarkably influence on adsorption of Pb(Ⅱ) ions onto GPA. The suitable conditions for the adsorption conditions were as following: solution pH, 5.3~6.5; contact time, 1.5 hours; GPA dosage, 10 g/L; initial Pb(Ⅱ) ion concentration, 100 mg/L; temperature, 30°C. Under the suitable conditions, the removal rate of Pb(Ⅱ) was more than 90% and the sorption capacities of the GPA for Pb(Ⅱ) were 12.73mg/g. Adsorption kinetics of Pb(Ⅱ) ions onto GPA obeyed pseudo-second-order equation. The isothermal adsorption can be described well by Langmuir, Freundlich and Temkin models, and the Freundlich model was the best.

Adsorption Analysis of Cr(VI) by Fly Ash Composite Material in Aqueous Medium

2010 ◽  
Vol 142 ◽  
pp. 143-147
Author(s):  
Hong Qin Xue ◽  
Zhao Qian Jing ◽  
Zheng Wang
Keyword(s):  
Composite Material ◽  
Fly Ash ◽  
Hexavalent Chromium ◽  
Contact Time ◽  
Metal Removal ◽  
Batch Experiments ◽  
Aqueous Samples ◽  
Batch Systems ◽  
Adsorption Analysis ◽  
Endothermic Process

The adsorption technique using fly ash composite material has been applied for the removal of Cr(VI) from aqueous samples. Batch experiments have been carried out for the adsorption of Cr(VI) onto fly ash composite material. The effects of various process parameters, namely, pH, adsorbent dosage, initial Cr(VI) concentration and contact time has been studied in batch systems. Maximum metal removal ratio was observed at pH 5.0~5.5, and the sorption reaction was an endothermic process. The results revealed that the hexavalent chromium is considerably adsorbed on this adsorbent and it could be an economical method for the removal of hexavalent chromium from aqueous systems.

scholarly journals Adsorption Kinetic Behaviour of Pure CO2, N2 and CH4 in Natural Clinoptilolite at Different Temperatures

2003 ◽  
Vol 21 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Gelacio Aguilar-Armenta ◽  
María E. Patiño-Iglesias ◽  
Roberto Leyva-Ramos
Keyword(s):  
Natural Zeolite ◽  
Contact Time ◽  
Adsorption Process ◽  
Gas Adsorption ◽  
High Vacuum ◽  
Adsorption Kinetic ◽  
Different Temperatures ◽  
Natural Clinoptilolite ◽  
T Values ◽  
Kinetics Of

The adsorption kinetics of pure CO2, N2 and CH4 on a natural clinoptilolite (ZSL) sample from Villa de Reyes (San Luis Potosí, México) were measured at different temperatures using a glass, high-vacuum volumetric system. The ability of the natural zeolite to adsorb these gases depended on the gas–adsorbent contact time, t. For short values of t, the gas adsorption uptakes decreased in the order CO2 >> N2 > CH4. However, for long t values, the adsorption uptakes decreased in the sequence CO2 > CH4 > N2. It was established that the activation energies (kJ/mol) for the adsorption process increased in the following order CO2 (15) < N2 (18) < CH4 (40), correlating fairly well with the increasing order of kinetic diameter (Å) of the molecules: CO2 (3.3) < N2 (3.64) < CH4 (3.8). In comparison to the ZSL sample, the rate of adsorption of N2 and CH4 on H-ZSL increased and the total adsorption capacity decreased. The ZSL sample may be recommended as an effective adsorbent for the separation of CO2/CH4 and N2/CH4 mixtures.

Adsorption of Pb(II) on Hydroxyapatite/(Poly Vinyl Alcohol) Blend Material

2013 ◽  
Vol 781-784 ◽  
pp. 2253-2256
Author(s):  
Hao Yang ◽  
Jian Hong Wang ◽  
Kai Peng Cheng ◽  
Meng Tian Yan ◽  
Cong Zhen Qiao
Keyword(s):  
Composite Material ◽  
Adsorption Kinetics ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Batch Experiments ◽  
Order Model ◽  
First Order ◽  
Pseudo First Order ◽  
Kinetics Of

The adsorption of Pb (II) on hydroxyapatite/(Poly Vinyl Alcohol) composite material was studied in this paper. HA/PVA was prepared firstly. The effect of initial Pb (II) concentration, composition of absorbent were investigated in batch experiments. The adsorption kinetics was calculated. The kinetics of the adsorption followed a pseudo-first order model.

scholarly journals Kinetika Adsorpsi Zat Warna Tartrazina Menggunakan Limbah Ampas Tahu sebagai Adsorben

2020 ◽  
Vol 5 (2) ◽  
pp. 63
Author(s):  
Matheis F.J.D.P. Tanasale ◽  
Yusthinus T Male ◽  
Nina B Garium
Keyword(s):  
Amino Acids ◽  
Correlation Coefficient ◽  
Adsorption Kinetics ◽  
Contact Time ◽  
Adsorption Process ◽  
Freundlich Isotherm ◽  
Pseudo Second Order ◽  
As Adsorption ◽  
Zwitter Ion ◽  
Kinetics Of

It has been conducted a research about the utilization waste of tofu as adsorbent of tartrazine dye. Utilization waste of tofu as adsorption because tofu contains protein which has the power adsorption of amino acids that form a zwitter ion. The purpose of this study was to determine the adsorption process and adosrption kinetics model of tartrazine dye by waste of tofu as adsorbent. Making the adsorbent is done by making waste of tofu into powder with a size of 100 mesh. The method used in the analysis of tartrazine dye is using UV-Vis. Adsorption of of tartrazine dye using waste of tofu at concentrations of 50 ppm and a contact time of 80 minutes with weight adsorbent 0.3 g. The two isotherms were used that Langmuir isotherm and Freundlich isotherm, the adsorption studies of tartrazine dye adsorbent waste of tofu follow Freundlich adsorption isotherms with a correlation coefficient (R2) of 94.4%, KF is 0.0026 mg/g and n is 0.5621. Adsorption kinetics of of tartrazine dye adsorbent waste of tofu following the model of adsorption Ho pseudo-second order with a correlation coefficient (R2) of 100%, Xe is 1.7761 mg/g and k2,ads is -0.6550 g/mg minutes. The mechanism adsorption of of tartrazine dye with waste of tofu as adsorbent is chemisorpsi process.

scholarly journals Kinetika Adsorpsi Nikel (II) dalam Larutan Aqueous dengan Karbon Aktif Arang Tempurung Kelapa

2016 ◽  
Vol 10 (2) ◽  
pp. 36 ◽  
Author(s):  
Ardelita Adiningtyas ◽  
Panut Mulyono
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Kinetics ◽  
Particle Diameter ◽  
Adsorption Kinetic ◽  
Coconut Shell ◽  
Nickel Concentration ◽  
Mass Ratio ◽  
Adsorption Temperature ◽  
Kinetics Of

The adsorption kinetics of nickel (II) in aqueous solution with activated carbon from coconut shell was studied by measuring the nickel concentration in the solution (C) as a function of time (t). The parameters studied in this study were adsorption temperature (T), particle diameter of activated carbon (d), and mass ratio of activated carbon to aqueous solution (r). It was found that the adsorption rate increased with the increase of the adsorption temperature and the mass ratio of activated carbon to aqueous solution. On the contrary, it was found that the rate of adsorption decreased with increasing the particle diameter of the activated carbon. Keywords: adsorption kinetic, nickel (II), activated carbon, coconut shell Kinetika adsorpsi larutan nikel (II) dalam air dengan karbon aktif tempurung kelapa dianalisis dengan mengukur konsentrasi nikel pada larutan sebagai fungsi waktu. Parameter yang digunakan pada penelitian ini adalah suhu adsorpsi (T), diameter partikel karbon aktif tempurung kelapa (d), dan rasio massa karbon aktif tempurung kelapa dengan larutan nikel (II) dalam air (r). Hasil penelitian menunjukkan bahwa laju adsorpsi meningkat dengan bertambahnya suhu adsorpsi dan rasio massa karbon aktif tempurung kelapa dengan larutan. Sedangkan, laju adsorpsi menurun dengan bertambahnya ukuran diameter partikel karbon aktif tempurung kelapa. Kata kunci: kinetika adsorpsi, nikel (II), karbon aktif, tempurung kelapa

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