Reduction of chemical oxygen demand through electrocoagulation: an exclusive study for hazardous waste landfill leachate

2021 ◽  
Author(s):  
Pratibha Gautam ◽  
Sunil Kumar
Keyword(s):  
Chemical Oxygen Demand ◽  
Hazardous Waste ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Waste Landfill ◽  
Hazardous Waste Landfill

Hazardous waste landfill leachate characteristics

1993 ◽  
Vol 13 (8) ◽  
pp. 573-580 ◽  
Author(s):  
Cynthia Pavelka ◽  
Raymond C. Loehr ◽  
Bruce Haikola
Keyword(s):  
Hazardous Waste ◽  
Landfill Leachate ◽  
Waste Landfill ◽  
Leachate Characteristics ◽  
Hazardous Waste Landfill

scholarly journals Treatment of hazardous waste landfill leachate using Fenton oxidation process

2018 ◽  
Vol 34 ◽  
pp. 02034 ◽  
Author(s):  
Pradeep Kumar Singa ◽  
Mohamed Hasnain Isa ◽  
Yeek-Chia Ho ◽  
Jun-Wei Lim
Keyword(s):  
Reaction Time ◽  
Hazardous Waste ◽  
Landfill Leachate ◽  
Molar Ratio ◽  
Oh Radicals ◽  
Fenton Reagent ◽  
Leachate Treatment ◽  
Experimental Conditions ◽  
Waste Landfill ◽  
Hazardous Waste Landfill

The efficiency of Fenton’s oxidation was assessed in this study for hazardous waste landfill leachate treatment. The two major reagents, which are generally employed in Fenton’s process are H2O2 as oxidizing agent and Fe2+ as catalyst. Batch experiments were conducted to determine the effect of experimental conditions viz., reaction time, molar ratio, and Fenton reagent dosages, which are significant parameters that influence the degradation efficiencies of Fenton process were examined. It was found that under the favorable experimental conditions, maximum COD removal was 56.49%. The optimum experimental conditions were pH=3, H2O2/Fe2+ molar ratio = 3 and reaction time = 150 minutes. The optimal amount of hydrogen peroxide and iron were 0.12 mol/L and 0.04 mol/L respectively. High dosages of H2O2 and iron resulted in scavenging effects on OH• radicals and lowered degradation efficiency of organic compounds in the hazardous waste landfill leachate.

Hazardous waste landfill leachate treatment by combined chemical and biological techniques

2015 ◽  
Vol 57 (28) ◽  
pp. 13236-13245 ◽  
Author(s):  
Eneliis Kattel ◽  
Arthur Kivi ◽  
Kati Klein ◽  
Taavo Tenno ◽  
Niina Dulova ◽  
...  
Keyword(s):  
Hazardous Waste ◽  
Landfill Leachate ◽  
Leachate Treatment ◽  
Waste Landfill ◽  
Hazardous Waste Landfill

Characterization of solidification for disposal of hazardous waste landfill leachate

2019 ◽  
Vol 27 (4) ◽  
pp. 4227-4235
Author(s):  
Ya Gu ◽  
Lijia Wang ◽  
Dongsheng Shen ◽  
Jinmu Ruan ◽  
Saijun Lv ◽  
...  
Keyword(s):  
Hazardous Waste ◽  
Landfill Leachate ◽  
Waste Landfill ◽  
Hazardous Waste Landfill

Treatment of a complex landfill leachate with peat

1978 ◽  
Vol 5 (1) ◽  
pp. 83-97 ◽  
Author(s):  
Robert D. Cameron
Keyword(s):  
Chemical Oxygen Demand ◽  
Ferric Chloride ◽  
Landfill Leachate ◽  
Metal Removal ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Manganese Concentration ◽  
Chemical Pretreatment ◽  
Iron Manganese

The use of cheap, locally available peat as a treatment method for landfill leachate was investigated by passing leachate through plexiglass columns filled with an amorphous-granular peat. Preliminary adjustment of pH showed that reducing pH to 4.8 dramatically reduced adsorption. Increasing the pH to 8.4, metal removal was increased owing to filtration of precipitated metals. The best adsorption of metals occurred at the 'natural' pH of 7.1. Manganese was found to be the limiting pollutant. At the 0.05 mg/ℓ maximum acceptable manganese concentration 94% of the total metals were removed, requiring 159 kg of peat per 1000 ℓ of leachate.Resting the peat for 1 month did significantly increase removal capacity.Desorption of some contaminants occurred when water was percolated through the peat. The desorption test effluent was not toxic to fish although iron, lead and COD (chemical oxygen demand) exceeded acceptable values.Chemical pretreatment using lime and ferric chloride achieved significant iron, manganese and calcium removals. Chemical pretreatment followed by peat adsorption offered no advantage other than reducing toxicity to fish.Peat treatment alone was effective in reducing concentrations to a level that was non-toxic to fish.

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