Occurrence of organic micropollutants in municipal landfill leachate and its effective treatment by advanced oxidation processes

Pisharody, Lakshmi; Gopinath, Ashitha; Malhotra, Milan; Nidheesh, P.V.; Kumar, Manish

doi:10.1016/j.chemosphere.2021.132216

Cited by 80 publications

(18 citation statements)

References 224 publications

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“…Coagulant (sodium ferrate) does not affect alkaline pH; therefore, the selected pH range was 2, 4, 5.5, and 7. Also at neutral pH,[ 7 ] the COD removal efficiency has probably decreased due to approaching the alkaline pH range.…”

Section: Resultsmentioning

confidence: 99%

“…Release of these toxic compounds into the natural environment poses a significant environmental problem associated with the disposal of solid waste. [ 6 7 8 9 10 ] The produced leachate varies in terms of composition and quantity that depends on several factors, such as the type and amount of disposed waste, degree of compaction, climate, and moisture content in waste. [ 5 11 ] This wastewater may contain large quantity of organic matter (biodegradable and refractory), ammonia, hydrocarbons, heavy metals, and inorganic salts; these compounds are the main contributors of high chemical oxygen demand (COD) and color pollution.…”

Section: Introductionmentioning

confidence: 99%

“…[ 13 5 ] The leachate is considered one of the major problems related to solid waste management and needs to be treated in a proper way to prevent environmental hazards. [ 6 7 8 9 10 ]…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Chemical Oxygen Demand and Color Removal from Leachate Using Coagulation/Flocculation Combined with Advanced Oxidation Process

Arbabi

Tousizadeh

Tondro

et al. 2022

Advanced Biomedical Research

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Background: One of the basic practices in the field of waste management is the collection and treatment of leachate. Leachate from municipal waste due to high chemical oxygen demand (COD) and dark color is a potential pollutant of the environment, which causes a lot of problems in the absence of treatment and direct discharge to the environment. This study aimed to determine the efficiency of ultrasonic process in combination with coagulation and flocculation process using sodium ferrate in COD and color reduction. Materials and Methods: In this experimental study, all experiments were performed in batch conditions and with changing process variables such as pH and sonication time, and the effect of three parameters, including ultrasonic reaction time (15, 30, and 45 min), pH (2, 4, 5/5, and 7), and coagulant dosage (from 1 to 150 g/l) on the COD reduction and color removal, was evaluated. Coagulant concentration and then the removal efficiency of COD and color were analyzed by ANOVA using SPSS 18. Results: The COD reduction and color removal were 87.05% and 88.6% in optimal condition (using 120 g/L of sodium ferrate at pH 5.5), with coagulation/flocculation, after ultrasound (15 min). Ultrasound (15 min) + sodium ferrate (without coagulation/flocculation) achieved 46.25% of COD reduction and 90.35% of color elimination, whereas the ultrasonic process alone allowed removing the COD and color in the leachate by less than 50%. Conclusion: The results indicate that C–F followed by ultrasonic can be used to efficiently reduce the organic matter and color from municipal waste leachate, and it would be an ideal option for leachate treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of Chemical Oxygen Demand and Color Removal from Leachate Using Coagulation/Flocculation Combined with Advanced Oxidation Process

Arbabi

Tousizadeh

Tondro

et al. 2022

Advanced Biomedical Research

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show abstract

“…A stock solution of MPs mixture, each at a concentration of 10.0 ± 0.2 mg/L, was spiked into raw leachate to reach a concentration of 200 ± 4 μg/L for each compound. This concentration was chosen based on reported environmentally relevant concentrations and the available analytical capability (Pisharody et al, 2021).…”

Section: Landfill Leachate Sampling Characteristics and Mp Spikingmentioning

confidence: 99%

“…Additionally, the widespread detection of emerging micropollutants (MPs, e.g. pharmaceuticals and personal care products, pesticides, and industrial chemicals) in landfill leachate has raised concerns among researchers and governments about optimizing or upgrading the existing leachate treatment plants to enhance MPs removal (Qi et al, 2018;Pisharody et al, 2021).…”

Section: Introductionmentioning

confidence: 99%