Constructed wetlands as a sustainable technology for wastewater treatment with emphasis on chromium-rich tannery wastewater

Younas, Fazila; Niazi, Nabeel Khan; Bibi, Irshad; Afzal, Muhammad Tanvır; Hussain, Khalid; Shahid, Muhammad; Aslam, Zubair; Bashir, Safdar; Hussain, Muhammad Mahroz; Bundschuh, Jochen

doi:10.1016/j.jhazmat.2021.126926

Cited by 69 publications

(27 citation statements)

References 158 publications

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“…Mainly, the environmental impact of these methods is adverse because in some remedial techniques the by-products of the treatment are more harmful than the actual contaminant (Santos et al, 2021; Teewno, A M, 2021). Also, these methods relay upon requirement of expensive chemicals and labor intensive (Younas et al, 2022). Thus, it is necessary to engage lower-cost, more efficient, and sustainable technologies.…”

Section: Introductionmentioning

confidence: 99%

Municipal Solid Waste Landfill Leachate Treatment by Phragmites australis, Typha latifolia and Scirpus validus through Constructed Wetlands

Sial¹,

Teewno²,

Memon³

et al. 2023

J. Ecol. Eng.

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The CWs were planted with Phragmites australis, Typha latifolia and Scirpus validus with sand and gravel. The leachate had been treated with two different cycles, first cycle was performed in the winter season whereas second cycle in summer, to differentiate the performance with seasonal variation. Chemical parameters of leachate pH, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids TSS, Ammonia-nitrogen (NH 3 -N), Nitrate-nitrogen (NO 3 -N), Total Phosphate PO 4 3-(TP) and heavy metals, Lead (Pb) and Copper (Cu) were tested with intervals of certain weeks. The tests result showed that all parameters experienced a considerable reduction in their concentrations. Significant reduction efficiencies were recorded for parameters, BOD with 53-82%, COD with 32-46%, TSS with 59-75%, NH 3 -N with 90-92%, NO 3 -N with 85-87%, and TP with 48-64%, and heavy metals Pb and Cu with 28-48% respectively in four weeks of the first cycle by all three plants. Whereas, in the second cycle, the removal efficiencies of BOD 78-93%, COD 63-76%, TSS 52-83%, NH 3 -N 90-91% and NO 3 -N 91-92% and heavy metals Pb and Cu with 21-58% respectively in five weeks were observed by all three plants. Along with the experimentation, United Nations Sustainable Development Goals UN SDGs are also highlighted. This study helps achieving tremendous SDGs accompanying treatment of leachate.

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Section: Introductionmentioning

confidence: 99%

Municipal Solid Waste Landfill Leachate Treatment by Phragmites australis, Typha latifolia and Scirpus validus through Constructed Wetlands

Sial¹,

Teewno²,

Memon³

et al. 2023

J. Ecol. Eng.

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“…It is widely accepted that the most commonly available treatment processes such as flocculation, sedimentation, filtration, activated sludge or chlorination, are inappropriate to remove PPs. However, promising ways to remove PPs are offered by new technologies such as activated sludge treatment [8,9], submerged membrane bioreactor [10,11], mixed cultures [12], constructed wetland [13], coagulation [14], membrane bioreactor technology [15], advanced oxidation processes (AOPs) [16][17][18] and adsorption [19]. But these technologies also have some draw backs.…”

Section: Introductionmentioning

confidence: 99%

Optimisation of a photocatalytic water treatment using response surface methodology and quality by design Approach

Mouchtari

Claeys‐Bruno

Rafqah

et al. 2022

International Journal of Environmental Analytical Chemistry

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Many water treatments methods have been developed to remove organic pollutants from contaminated waters. Their efficiency is usually assessed by removal measurements and the effect of operational factors on the processe is rarely explored. To bridge this gap, an experimental design methodology has been applied to optimize an advance oxidation process combining adsorption and photocatalysis, using AZURAD® software. This approach was applied to the removing of carbamazepine (CBZ) in aqueous solution by a bio sourced activated carbon and TiO 2 composite material under light exposure. Two experimental designs were performed considering three quantitative factors (pH, catalyst dose and temperature) and one qualitative factor (dissolved oxygen concentration). From the response surface methodology (RSM), the optimized operational factors for CBZ adsorption and degradation were independently determined.Using desirability function approach, common optimized conditions for both process were assessed with a catalyst dose of 0.13 g.L -1 , oxygen saturated medium and either pH = 9.5 and T = 40°C or pH = 7.8 and T = 10°C. The Quality by Design approach showed that the experimental conditions could vary maintaining the adsorption and photocatalysis process removal efficiency (with more than 70 and 80%, respectively) with a high probability of 80%. This highlights the robustness of the treatment process and its potential upscaling.

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“…The development of artificial wetlands as biological treatment systems to decontaminate wastewater not only is an excellent alternative to significantly reduce pollution levels in water bodies, but also an affordable alternative for these small industries, which do not have sufficient economic flow to acquire conventional wastewater treatment systems. In an artificial wetland, gravel, sand, soil, plants, and microorganisms present in the environment are used to decontaminate wastewater [11]. Constructed wetlands are mainly characterized by the presence of water on the surfaceor below the surface of the support material or plant substrateand by the direction of flow, horizontal or vertical [12].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, this project aims to continue a previous study that analyzed the capacity of Limonium perezzi for tannery soaking process wastewater treatment. It should be noted that the use of artificial wetlands for wastewater treatment is related to the fulfillment of the Sustainable Development Goals, specifically 2, 3, 6, 12, 13, 14, and 15 [11].…”

Section: Introductionmentioning

confidence: 99%

Impacto de la densidad de plantación en la eficacia de humedales artificiales a escala de laboratorio plantados con Limonium Perezzi para el tratamiento de aguas residuales de curtiembres

et al. 2022

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Se analizó el efecto de la densidad de plantación de la especie Limonium perezzi sobre la efectividad de humedales artificiales a escala de laboratorio para el tratamiento de aguas residuales de la etapa de remojo en curtiembres. La densidad de plantación fue de 10.27 plantas/m2 (HAP4) y 15.4 plantas/m2 (HAP6), el tiempo de retención hidráulica en cada humedal fue de 4.5 días y los experimentos fueron realizados por 32 días, tiempo en el que las plantas comenzaron a marchitarse, dentro de los cuales fueron tomadas muestras de agua para el respectivo análisis. Los humedales fueron operados por 8 semanas a fin de observar el deterioro de estas con respecto al tiempo. El periodo de estabilización de los humedales varió entre 7 y 10 días hasta que la concentración del efluente fue poco variable. El análisis estadístico de los resultados indica que la densidad de plantación influye sobre la efectividad del humedal en términos de porcentaje de disminución de concentración, los humedales plantados con 15.4 plantas/m2 fueron más eficientes, lo cual se determinó a partir de la prueba T de Student (p < 0.05). Los porcentajes de disminución de la demanda química de oxígeno, cloruros y sólidos disueltos totales para la mayor densidad de plantación fueron de 81 %, 54 % y 55 % respectivamente. Al igual que en estudios previos, se observó que la especie plantada tiene la habilidad de tomar sal y liberarla a través de hojas y tallos, hecho que se pudo apreciar a partir del séptimo día de operación.

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Constructed wetlands as a sustainable technology for wastewater treatment with emphasis on chromium-rich tannery wastewater

Cited by 69 publications

References 158 publications

Municipal Solid Waste Landfill Leachate Treatment by <i>Phragmites australis</i>, <i>Typha latifolia</i> and <i>Scirpus validus</i> through Constructed Wetlands

Municipal Solid Waste Landfill Leachate Treatment by <i>Phragmites australis</i>, <i>Typha latifolia</i> and <i>Scirpus validus</i> through Constructed Wetlands

Optimisation of a photocatalytic water treatment using response surface methodology and quality by design Approach

Impacto de la densidad de plantación en la eficacia de humedales artificiales a escala de laboratorio plantados con Limonium Perezzi para el tratamiento de aguas residuales de curtiembres

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