Removal of Heavy Metal from Wastewater Using Zeolite from Fly Ash

2012 ◽  
Vol 518-523 ◽  
pp. 2736-2739 ◽  
Author(s):  
Chang Nian Wu ◽  
Yu Chao Tang ◽  
Li Hua Tang
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Heavy Metal Ions ◽  
Coal Fly Ash ◽  
Freundlich Isotherm ◽  
Zeolite Synthesis ◽  
Pseudo Second Order ◽  
Xrd Patterns ◽  
Isotherm Equations ◽  
Modified Forms

Coal fly ash (CFA) was modified by hydrothermal treatment using NaOH solutions for zeolite synthesis. The XRD patterns of zeolite and coal fly ash are presented. The synthesized zeolite was investigated for adsorption of heavy metal ions in aqueous solution. It was shown that fly ash and the modified forms could effectively absorb heavy metals. The adsorption isotherm could be described by Freundlich isotherm equations. The pseudo second-order kinetics would be better for fitting the dynamic adsorption of Cu2+ and Cd2+.

Removal of Methylene Blue from Wastewater Using Zeolite from Fly Ash

2012 ◽  
Vol 610-613 ◽  
pp. 1286-1289
Author(s):  
Chang Nian Wu ◽  
Qi Ling ◽  
Li Wang ◽  
Wei Hua Li ◽  
Yu Chao Tang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Freundlich Isotherm ◽  
Dynamic Adsorption ◽  
Zeolite Synthesis ◽  
Pseudo Second Order ◽  
Xrd Patterns ◽  
Isotherm Equations ◽  
Modified Forms

Coal fly ash (CFA) was modified by hydrothermal treatment using NaOH solutions for zeolite synthesis. The XRD patterns of zeolite and coal fly ash are presented. The synthesized zeolite was investigated for adsorption of methylene blue（MB）in aqueous solution. It was shown that fly ash and the modified forms could effectively absorb MB. The adsorption isotherm could be described by Freundlich isotherm equations. The pseudo second-order kinetics would be better for fitting the dynamic adsorption of MB.

scholarly journals Synthesis of Zeolite from Fly Ash and Removal of Heavy Metal Ions from Newly Synthesized Zeolite

2010 ◽  
Vol 7 (4) ◽  
pp. 1200-1205 ◽  
Author(s):  
Parag Solanki ◽  
Vikal Gupta ◽  
Ruchi Kulshrestha
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Coal Fly Ash ◽  
Proximate Analysis ◽  
13X Zeolite ◽  
Alkali Fusion ◽  
Type Zeolite ◽  
The Cost

Coal fly ash was used to synthesize X-type zeolite by alkali fusion followed by hydrothermal treatment. Characteristics of the various Fly ash samples were carried out. Coal proximate analysis was done. Batch experiment was carried out for the adsorption of some heavy metal ions on to synthesized Zeolite. The cost of synthesized zeolite was estimated to be almost one-fifth of that of commercial 13X zeolite available in the market.

scholarly journals 1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

Environments ◽  
2019 ◽  
Vol 6 (6) ◽  
pp. 68
Author(s):  
Mohamed Ould M’hamed ◽  
Lotfi Khezami
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Kinetics ◽  
Heavy Metal Ions ◽  
Freundlich Isotherm ◽  
Second Order ◽  
Solution Interface ◽  
Adsorption Data ◽  
Pseudo Second Order ◽  
Thermodynamic Variables

The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and infrared (IR) were used to identify the obtained tetrahydropyrimidine derivatives. Furthermore, batches of experiments were carried out to establish the adsorption equilibrium, kinetics, and thermodynamic variables of the tetrahydropyrimidine derivatives for toxic heavy Cd(II) ions. The adsorption data were simulated by applying the Langmuir manner, the Freundlich equation, the pseudo-first-order and pseudo-second-order equations. The adsorption procedure was discovered to be very influenced by PH. The removal of heavy metal ions reached a maximum value quickly within 6 min and the adsorption data better adjusted the Langmuir isotherm than that of the Freundlich isotherm. The maximum Cd(II) ions adsorption capacity was approximated to be 151.16 mg g−1 at 328 K and a pH of 6 to 7. It was found that the adsorption kinetics of Cd(II) ions obeyed pseudo-second-order adsorption kinetics. The examination of the thermodynamic variables of tetrahydropyrimidine derivative showed a spontaneous endothermic adsorption procedure. Otherwise, positive entropy values put forward a rise in the randomness at the solid-solution interface when heavy metal ions are adsorbed.

scholarly journals Adsorption Kinetics of Fe and Mn with Using Fly Ash from PT Semen Baturaja in Acid Mine Drainage

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Indah Purnamasari ◽  
Endang Supraptiah
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Acid Mine Drainage ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Mine Drainage ◽  
Coal Fly Ash ◽  
Adsorption Model ◽  
Acid Mine ◽  
Fe And Mn

One used method to reduce heavy metal ions in acid mine drainage is to adsorb them by coal fly ash. This research aimed to study the isotherms equilibrium and the adsorpstion kinetics that fit with decreasing metals ion. Acid mine draigane and fly ash were charge into batch coloumn adsorption with specified comparison. Variables investigated were dactivated and activated fly ash, adsorption times (0, 20, 30, 40,50, and 60 minutes), adsorben weights (10, 20, 30, 40, 50, and 60 gram), and pH (1, 3, 5, 7, and 9). The results showed that fly ash can be used to reduce the levels of heavy metal ions Fe and Mn. Coal fly ash adsorption model of acid mine drainage fits to Freundlich adsorption isotherm in all condition. First order pseudo model kinetics is suitable for Fe and Mn adsorption processes. The value of adsorpsi rate constants vary around : Fe and Mn (deactivated fly ash) 0.2388 min-1 with R2 = 0.4455 and 0.4173 min-1 with R2 = 0.9781, Fe and Mn (activated fly ash) 0.5043 min-1 dengan R2 = 1 and 0.2027 min-1 with R2 = 0.8803.

Evaluation of Cocomposted Coal Fly Ash on Dynamics of Microbial Populations and Heavy Metal Uptake

1999 ◽  
Vol 7 (1) ◽  
pp. 81-90 ◽  
Author(s):  
G. Vallini ◽  
F. Vaccari ◽  
A. Pera ◽  
M. Agnolucci ◽  
S. Scatena ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Metal Uptake ◽  
Coal Fly Ash ◽  
Microbial Populations ◽  
Heavy Metal Uptake

Heavy metal characterization of CFB-derived coal fly ash

2011 ◽  
Vol 92 (3) ◽  
pp. 441-446 ◽  
Author(s):  
Nikolaos Koukouzas ◽  
Chrisovalantis Ketikidis ◽  
Grigorios Itskos
Keyword(s):  
Heavy Metal ◽  
Fly Ash ◽  
Coal Fly Ash

scholarly journals Comparison of adsorption of Cd(II) and Pb(II) ions on pure and chemically modified fly ashes

2016 ◽  
Vol 37 (2) ◽  
pp. 215-234 ◽  
Author(s):  
Eleonora Sočo ◽  
Jan Kalembkiewicz
Keyword(s):  
Fly Ash ◽  
Water Solution ◽  
Coal Fly Ash ◽  
Mixing Time ◽  
Sorption Process ◽  
Particle Model ◽  
X Ray Scattering ◽  
Equilibrium And Kinetics ◽  
Pseudo Second Order ◽  
Polluted Waters

Abstract The study investigates chemical modifications of coal fly ash (FA) treated with HCl or NH4HCO3 or NaOH or Na2edta, based on the research conducted to examine the behaviour of Cd(II) and Pb(II) ions adsorbed from water solution on treated fly ash. In laboratory tests, the equilibrium and kinetics were examined applying various temperatures (293 - 333 K) and pH (2 - 11) values. The maximum Cd(II) and Pb(II) ions adsorption capacity obtained at 293 K, pH 9 and mixing time 2 h from the Langmuir model can be grouped in the following order: FA-NaOH > FA-NH4HCO3 > FA > FA-Na2edta > FA-HCl. The morphology of fly ash grains was examined via small-angle X-ray scattering (SAXS) and images of scanning electron microscope (SEM). The adsorption kinetics data were well fitted by a pseudo-second-order rate model but showed a very poor fit for the pseudofirst order model. The intra-particle model also revealed that there are two separate stages in the sorption process, i.e. the external diffusion and the inter-particle diffusion. Thermodynamics parameters such as free energy, enthalpy and entropy were also determined. A laboratory test demonstrated that the modified coal fly ash worked well for the Cd(II) and Pb(II) ion uptake from polluted waters.

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