Removal of Natural Organic Matter of Artificial Lake by Modified Fly Ash

2013 ◽  
Vol 690-693 ◽  
pp. 1020-1023
Author(s):  
Chang Nian Wu ◽  
Li Wang ◽  
Qi Ling ◽  
Yu Chao Tang ◽  
Jian Huang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fly Ash ◽  
Natural Organic Matter ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Kinetic Studies ◽  
Artificial Lake ◽  
Sem Images ◽  
Sulfuric Acid Treatment ◽  
Surface Areas

Coal fly ash (CFA) modified by sulfuric acid treatment was used as a low-cost adsorbent for removing natural organic matter (NOM) in an artificial lake. The specific surface areas and SEM images of modified coal fly ash (MCFA) and CFA were observed. Two equilibrium models were compared to evaluate NOM removal process with a better fitting using the Freundlich model. Kinetic studies were also carried out to fit the experimental data. The pseudo second-order provided the highest coefficients of determination.

scholarly journals Removal of natural organic matter (NOM) from an aqueous solution by NaCl and surfactant-modified clinoptilolite

2014 ◽  
Vol 13 (2) ◽  
pp. 394-405 ◽  
Author(s):  
Mehdi Vosoughi Niri ◽  
Amir Hosein Mahvi ◽  
Mahmoud Alimohammadi ◽  
Mohammad Shirmardi ◽  
Hafez Golastanifar ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Low Cost ◽  
Correlation Coefficients ◽  
Kinetic Studies ◽  
Hexadecyltrimethylammonium Bromide ◽  
Order Kinetic ◽  
Gradual Process ◽  
Initial Ph ◽  
Equilibrium Data

Zeolitic tuffs are found in different parts of the world. Iranian zeolite is a low-cost material that can be frequently found in nature. Surfactant-modified zeolite (SMZ) can be used for the adsorption of natural organic matter (NOM) from aqueous solutions. The adsorption study was conducted to evaluate the adsorption capacity of SMZ; furthermore, the effects of contact time, initial pH, and the initial adsorbent dose on the adsorption process were investigated in a batch system. The kinetic studies showed that the adsorption of NOM on SMZ was a gradual process. The optimum initial pH values for the adsorption of NOM on SMZ were in the acidic ranges. The batch kinetic experiments showed that the adsorption followed the pseudo-second-order kinetic model with good correlation coefficients. The equilibrium data were well described by the Langmuir isotherm model. The results show that the natural zeolite being modified with NaCl and hexadecyltrimethylammonium bromide as a cationic surfactant was an appropriate adsorbent for the removal of NOM.

A Noble and Economical Method for the Synthesis of Low Cost Zeolites From Coal Fly Ash Waste

2021 ◽  
pp. 1-19
Author(s):  
Virendra Kumar Yadav ◽  
R Suriyaprabha ◽  
Gajendra Kumar Inwati ◽  
Nitin Gupta ◽  
Bijendra Singh ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Economical Method

Thermodynamic and kinetic studies for the removal of safranin dye from aqueous solution using nap zeolite synthesized from coal fly ash

2021 ◽  
Author(s):  
Payal Jain ◽  
Priyanka Shrivastava ◽  
Vibha Malviya ◽  
Bijendra Rai ◽  
M. K. Dwivedi
Keyword(s):  
Aqueous Solution ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Kinetic Studies

scholarly journals Modified coal fly ash as low cost adsorbent for removal reactive dyes from batik industry

2018 ◽  
Vol 154 ◽  
pp. 01037 ◽  
Author(s):  
Agus Taufiq ◽  
Pratikno Hidayat ◽  
Arif Hidayat
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Reactive Dyes ◽  
Bet Surface Area ◽  
Batch Adsorption ◽  
Operational Parameters ◽  
Solution Ph ◽  
Percentage Removal ◽  
Modified Fly Ash

The removal of reactive dyes on modified coal fly ash has been investigated during a series of batch adsorption experiments. Physical characteristics of modified coal fly ash was characterized by Brunauer Emmett Teller (BET) surface area analysis, X-ray powder diffraction (XRD), Fourier transform infrared spectrophotometer (FT-IR), and scanning electron microscope (SEM). The effects of operational parameters such as initial dye concentration (50–200 mg/L), solution pH (4–10) and adsorbent dosage (50–200 mg/L) were studied. The adsorption experiments indicated that modified coal fly ash was effective in removing of Remazol Blue. The percentage removal of dyes increased while the modified fly ash dosage increased. The percentage removal of dyes increased with decreased initial concentration of the dye and also increased with amount of adsorbent used. The optimum of removal of dyes was found to be 94% at initial dye concentration 50 g/mL, modified fly ash dosage 250 g/mL, and pH of 2.0.

Evaluation of barrier materials for removing pollutants from groundwater rich in natural organic matter

2014 ◽  
Vol 70 (1) ◽  
pp. 32-39 ◽  
Author(s):  
I. Kozyatnyk ◽  
P. Haglund ◽  
L. Lövgren ◽  
M. Tysklind ◽  
A. Gustafsson ◽  
...  
Keyword(s):  
Organic Matter ◽  
Fly Ash ◽  
Natural Organic Matter ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Environmental Safety ◽  
Polluted Water ◽  
Contaminant Removal ◽  
Barrier Materials ◽  
Optimal Material

Permeable barriers are used for passive remediation of groundwater and can be constructed from a range of materials. The optimal material depends on the types of contaminants and physico-chemical parameters present at the site, as well as the hydraulic conductivity, environmental safety, availability, cost and long-term stability of the material itself. The aim of the presented study was to test a number of materials for their ability to remove heavy metals and organic pollutants from groundwater with a high (140 mg L−1) content of natural organic matter (NOM). The following materials were included in the study: sand, peat, fly ash, iron powder, lignin and combinations thereof. Polluted water was fed into glass columns loaded with each sorbent and the contaminant removal efficiency of the material was evaluated through chemical analysis of the percolate. Materials based on fly ash and zero-valent iron were found to be the most effective for heavy metal removal, while fly ash and peat were the most effective for removing aliphatic compounds. Filtration through lignin and peat led to leaching of NOM. Although the leaching decreased over time, it remained high throughout the experiments. The results indicate that remediation of contaminated land at disused industrial sites is a complex task that often requires the use of mixed materials or a minimum of two sequential barriers.

scholarly journals Synthesis of CHA Zeolite using Low Cost Coal Fly Ash

2015 ◽  
Vol 121 ◽  
pp. 961-966 ◽  
Author(s):  
Xiaotong Jin ◽  
Na Ji ◽  
Chunfeng Song ◽  
Degang Ma ◽  
Guoping Yan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Low Cost ◽  
Coal Fly Ash

A low-cost adsorbent from coal fly ash for mercury removal from industrial wastewater

2017 ◽  
Vol 5 (1) ◽  
pp. 391-399 ◽  
Author(s):  
Mahshid Attari ◽  
Syed Salman Bukhari ◽  
Hossein Kazemian ◽  
Sohrab Rohani
Keyword(s):  
Fly Ash ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Mercury Removal

scholarly journals Studies on the CO2 Capture by Coal Fly Ash Zeolites: Process Design and Simulation

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8279
Author(s):  
Silviya Boycheva ◽  
Ivan Marinov ◽  
Denitza Zgureva-Filipova
Keyword(s):  
Fly Ash ◽  
Co2 Capture ◽  
Carbon Capture ◽  
Low Cost ◽  
Coal Fly Ash ◽  
Cost Effective ◽  
Thermal Recovery ◽  
Raw Material ◽  
Dynamic Adsorption ◽  
Co2 Capture Capacity

At present, mitigating carbon emissions from energy production and industrial processes is more relevant than ever to limit climate change. The widespread implementation of carbon capture technologies requires the development of cost-effective and selective adsorbents with high CO2 capture capacity and low thermal recovery. Coal fly ash has been extensively studied as a raw material for the synthesis of low-cost zeolite-like adsorbents for CO2 capture. Laboratory tests for CO2 adsorption onto coal fly ash zeolites (CFAZ) reveal promising results, but detailed computational studies are required to clarify the applicability of these materials as CO2 adsorbents on a pilot and industrial scale. The present study provides results for the validation of a simulation model for the design of adsorption columns for CO2 capture on CFAZ based on the experimental equilibrium and dynamic adsorption on a laboratory scale. The simulations were performed using ProSim DAC dynamic adsorption software to study mass transfer and energy balance in the thermal swing adsorption mode and in the most widely operated adsorption unit configuration.

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