Physico-chemical treatment of anaerobic landfill leachate using activated carbon and zeolite: batch and column studies

2010 ◽  
Vol 5 (3/4) ◽  
pp. 269 ◽  
Author(s):  
Hamidi Abdul Aziz ◽  
Ahmed Abu Foul ◽  
Mohamed Hasnain Isa ◽  
Yung Tse Hung
Keyword(s):  
Activated Carbon ◽  
Landfill Leachate ◽  
Chemical Treatment ◽  
Column Studies ◽  
Physico Chemical

Wastewater Treatment With Activated Carbon

1972 ◽  
Vol 7 (1) ◽  
pp. 1-12
Author(s):  
A. Benedek
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Chemical Treatment ◽  
Technological Development ◽  
Municipal Waste ◽  
Research Needs ◽  
Physico Chemical ◽  
Recent Developments

Abstract Recent developments in the application of activated carbon to wastewater treatment are reviewed. Particular emphasis is placed on the physico-chemical treatment of municipal waste. Technological development, adsorptive behaviour, and research needs serve as the three primary discussion topics.

Physico-chemical treatment of Merida landfill leachate for chemical oxygen demand reduction by coagulation

2005 ◽  
Vol 23 (6) ◽  
pp. 560-564 ◽  
Author(s):  
Roger I. Méndez-Novelo ◽  
Elba R. Castillo-Borges ◽  
María R. Sauri-Riancho ◽  
Carlos A. Quintal-Franco ◽  
Germán Giacomán-Vallejos ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Landfill Leachate ◽  
Chemical Treatment ◽  
Oxygen Demand ◽  
Physico Chemical ◽  
Demand Reduction ◽  
Chemical Oxygen Demand Reduction

scholarly journals Physical characteristics of materials of Ecuadorian origin for water treatment

2021 ◽  
Vol 958 (1) ◽  
pp. 012020
Author(s):  
M Mayacela ◽  
L Maldonado ◽  
F Morales ◽  
B Suquillo
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Chemical Treatment ◽  
Laboratory Tests ◽  
Physical Characteristics ◽  
International Standards ◽  
Contaminated Water ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Wastewater Pollutants

Abstract In Ecuador, contaminated water is discharged directly into the sewage system. The treatments carried out for the elimination of wastewater pollutants are classified into three types: Physical, Chemical and Biological. One of the treatments that is frequently used is the physico-chemical treatment in which various reactive substances are used, which is why in this research several reactive substances of Ecuadorian origin, including activated carbon, peat, limestone, volcanic pyroclasts, zeolite clinoptilolite and zeolite modernite, are physically characterized. For this purpose, some laboratory tests were carried out based on national and international standards in order to obtain the granulometry, compactness coefficient, porosity, sphericity and permea-bility.

Combined physico-chemical treatment of secondary settled municipal wastewater in a multifunctional reactor

2013 ◽  
Vol 68 (8) ◽  
pp. 1715-1722 ◽  
Author(s):  
O. Santoro ◽  
T. Pastore ◽  
D. Santoro ◽  
F. Crapulli ◽  
M. Raisee ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sodium Hypochlorite ◽  
Chemical Treatment ◽  
Municipal Wastewater ◽  
Dose Range ◽  
Total Phenols ◽  
Total Coliforms ◽  
Physico Chemical ◽  
Powder Activated Carbon ◽  
Multifunctional Reactor

In this paper, the physico-chemical treatment of municipal wastewater for the simultaneous removal of pollutant indicators (chemical oxygen demand (COD) and total coliforms) and organic contaminants (total phenols) was investigated and assessed. A secondary settled effluent was subjected to coagulation, disinfection and absorption in a multifunctional reactor by dosing, simultaneously, aluminum polychloride (dose range: 0–150 μL/L), natural zeolites (dose range: 0–150 mg/L), sodium hypochlorite (dose range: 0–7.5 mg/L) and powder activated carbon (dose range: 0–30 mg/L). The treatment process was optimized using computational fluid dynamics (CFD) and response surface methodology. Specifically, a Latin square technique was employed to generate 16 combinations of treating agent types and concentrations which were pilot tested on an 8 m3/h multifunctional reactor fed by a secondary effluent with COD and total coliform concentrations ranging from ≈20 to 120 mg/L and from 105 to 106 CFU/100 mL, respectively. Results were promising, indicating that removal yields up to 71% in COD and 5.4 log in total coliforms were obtained using an optimal combination of aluminum polychloride (dose range ≈ 84–106 μL/L), powder activated carbon ≈ 5 mg/L, natural zeolite (dose range ≈ 34–70 mg/L) and sodium hypochlorite (dose range ≈ 3.4–5.6 mg/L), with all treating agents playing a statistically significant role in determining the overall treatment performance. Remarkably, the combined process was also able to remove ≈ 50% of total phenols, a micropollutant known to be recalcitrant to conventional wastewater treatments.

scholarly journals Performance of Iron-Functionalized Activated Carbon Catalysts (Fe/AC-f) on CWPO Wastewater Treatment

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 337
Author(s):  
Sara Mesa Medina ◽  
Ana Rey ◽  
Carlos Durán-Valle ◽  
Ana Bahamonde ◽  
Marisol Faraldos
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Landfill Leachate ◽  
Surface Composition ◽  
Treatment Plant ◽  
Reaction Medium ◽  
Pollutant Removal ◽  
Operating Conditions ◽  
Water Matrix ◽  
The Stability

Two commercial activated carbon were functionalized with nitric acid, sulfuric acid, and ethylenediamine to induce the modification of their surface functional groups and facilitate the stability of corresponding AC-supported iron catalysts (Fe/AC-f). Synthetized Fe/AC-f catalysts were characterized to determine bulk and surface composition (elemental analysis, emission spectroscopy, XPS), textural (N2 isotherms), and structural characteristics (XRD). All the Fe/AC-f catalysts were evaluated in the degradation of phenol in ultrapure water matrix by catalytic wet peroxide oxidation (CWPO). Complete pollutant removal at short reaction times (30–60 min) and high TOC reduction (XTOC = 80 % at ≤ 120 min) were always achieved at the conditions tested (500 mg·L−1 catalyst loading, 100 mg·L−1 phenol concentration, stoichiometric H2O2 dose, pH 3, 50 °C and 200 rpm), improving the results found with bare activated carbon supports. The lability of the interactions of iron with functionalized carbon support jeopardizes the stability of some catalysts. This fact could be associated to modifications of the induced surface chemistry after functionalization as a consequence of the iron immobilization procedure. The reusability was demonstrated by four consecutive CWPO cycles where the activity decreased from 1st to 3rd, to become recovered in the 4th run. Fe/AC-f catalysts were applied to treat two real water matrices: the effluent of a wastewater treatment plant with a membrane biological reactor (WWTP-MBR) and a landfill leachate, opening the opportunity to extend the use of these Fe/AC-f catalysts for complex wastewater matrices remediation. The degradation of phenol spiked WWTP-MBR effluent by CWPO using Fe/AC-f catalysts revealed pH of the reaction medium as a critical parameter to obtain complete elimination of the pollutant, only reached at pH 3. On the contrary, significant TOC removal, naturally found in complex landfill leachate, was obtained at natural pH 9 and half stoichiometric H2O2 dose. This highlights the importance of the water matrix in the optimization of the CWPO operating conditions.

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