Performance evaluation of vertical constructed wetland units with hydraulic retention time as a variable operating factor

Minakshi, Deepa; Sharma, Pradeep Kumar; Rani, Anju; Malaviya, Piyush; Srivastava, Vaibhav; Kumar, Manish

doi:10.1016/j.gsd.2022.100834

Cited by 14 publications

(2 citation statements)

References 38 publications

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“…Adicionalmente, se realizó una variación en los Tiempos de Retención Hidráulica (TRH) para evaluar su influencia en el proceso de remoción de Hg (Marrugo-Negrete et al, 2017). Los TRH fueron de 2 días para el humedal 1, y de 4 días para los humedales 2 y 3 (Mozaffari et al, 2021;Minakshi et al, 2022).…”

Section: Resultsunclassified

Assessment of mercury removal efficiency of a constructed wetland system from gold mining

Sierra

2024

Hidrobiológica

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Antecedentes. La contaminación por mercurio (Hg) producto del beneficio minero aurífero es un problema de índole ambiental, dada su capacidad de afectar los ecosistemas y la salud humana. Por lo cual, es fundamental proponer alternativas enfocadas en disminuir la contaminación producida principalmente al recurso hídrico, debido a la persistencia y permanencia de este metal pesado en el ambiente Objetivo. Evaluar la remoción de Hg y la carga orgánica del agua residual proveniente de un entable minero mediante un sistema de humedales de flujo subsuperficial horizontal. Métodos. Se realizó la caracterización fisicoquímica del agua residual minera, además, se diseñó y operó un sistema de tres humedales a los cuales se les varió el Tiempo de Retención Hidráulica (TRH) y la presencia o ausencia de Heliconia psittacorum, se evaluaron parámetros como pH, OD, turbidez, DBO 5 , DQO y Mercurio. Se aplicó una prueba estadística ANOVA con significancia del 95%. Resultados. El efluente minero arrojó concentraciones para DQO y Hg de 197 mg O 2 /L y 0,0021 mg/L, respectivamente, valores superiores a los permisibles por la normativa colombiana y de la EPA. Los humedales evaluados mostraron eficiencias de remoción para turbiedad, DBO 5 , DQO y Hg superiores al 98,44%, 93,10%, 71,52% y 91,03%, respectivamente. Las pruebas estadísticas sugieren que no existe diferencia significativa con respecto a la variación del TRH, pues los porcentajes de eficiencia de remoción del Hg para 2 y 4 días son relativamente similares Conclusiones. Los humedales de flujo subsuperficial horizontal y Heliconia psittacorum, son altamente eficientes en la remoción de Hg de aguas residuales de minería aurífera, consolidándose como una tecnología prometedora para la biorremediación ambiental.

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Section: Resultsunclassified

Assessment of mercury removal efficiency of a constructed wetland system from gold mining

Sierra

2024

Hidrobiológica

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“…It includes the type of plant, their quantity, morphological features, bed depth, bed dimensions, hydraulic loading rate, and organic loading rate. Unfortunately, constructed wetlands pose worrisome operational drawbacks concerning a larger footprint and higher retention time [ 70 ]. Notably, the efficiency for the elimination of four PCs, that is, DFC, IBP, carbamazepine (CBZ), and NPX in tropical constructed wetlands, has been investigated [ 71 ].…”

Section: Existing Technologies For Remediation Of Pcs With Adsorption...mentioning

confidence: 99%

Biochar-mediated removal of pharmaceutical compounds from aqueous matrices via adsorption

Chauhan

Shafi

Dubey

et al. 2022

Waste Dispos. Sustain. Energy

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Pharmaceutical is one of the noteworthy classes of emerging contaminants. These biologically active compounds pose a range of deleterious impacts on human health and the environment. This is attributed to their refractory behavior, poor biodegradability, and pseudopersistent nature. Their large-scale production by pharmaceutical industries and subsequent widespread utilization in hospitals, community health centers, and veterinary facilities, among others, have significantly increased the occurrence of pharmaceutical residues in various environmental compartments. Several technologies are currently being evaluated to eliminate pharmaceutical compounds (PCs) from aqueous environments. Among them, adsorption appears as the most viable treatment option because of its operational simplicity and low cost. Intensive research and development efforts are, therefore, currently underway to develop inexpensive adsorbents for the effective abatement of PCs. Although numerous adsorbents have been investigated for the removal of PCs in recent years, biochar-based adsorbents have garnered tremendous scientific attention to eliminate PCs from aqueous matrices because of their decent specific surface area, tunable surface chemistry, scalable production, and environmentally benign nature. This review, therefore, attempts to provide an overview of the latest progress in the application of biochar for the removal of PCs from wastewater. Additionally, the fundamental knowledge gaps in the domain knowledge are identified and novel strategic research guidelines are laid out to make further advances in this promising approach towards sustainable development.

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Biochar imparted constructed wetlands (CWs) for enhanced biodegradation of organic and inorganic pollutants along with its limitation

Munir,

Muneer,

Sadia

et al. 2024

Environ Monit Assess

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Performance evaluation of vertical constructed wetland units with hydraulic retention time as a variable operating factor

Cited by 14 publications

References 38 publications

Assessment of mercury removal efficiency of a constructed wetland system from gold mining

Assessment of mercury removal efficiency of a constructed wetland system from gold mining

Biochar-mediated removal of pharmaceutical compounds from aqueous matrices via adsorption

Biochar imparted constructed wetlands (CWs) for enhanced biodegradation of organic and inorganic pollutants along with its limitation

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