Mitigation of Wastewater-Borne Chorpyrifos in Constructed Wetlands: an Ecological Suitability Assessment by Macrophyte and Microbial Responses

Wang, Chuan; Liu, Biyun; Xu, Dong; Zhang, Liping; He, Feng; Zhou, Qiaohong; Wu, Zhenbin

doi:10.15244/pjoes/67656

Cited by 6 publications

(1 citation statement)

References 36 publications

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“…On the other hand, authors have highlighted that the importance of vegetation in CW resides in the rhizosphere, especially in rhizospheric bacterial strains [51,52]. The vegetation planted in the CWs was collected from agricultural drains where organophosphate pesticides and traces of organochlorines have been reported [22].…”

Section: Appl Sci 2020 10 X For Peer Review 10 Of 14mentioning

confidence: 99%

Efficient Malathion Removal in Constructed Wetlands Coupled to UV/H2O2 Pretreatment

et al. 2020

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Intensive agriculture has led to the increasing application of pesticides, such as malathion, thus generating large volumes of untreated cropland wastewater (CropWW). In this work, a hybrid system constructed wetlands (CW) coupled in continuous with an optimized UV/H2O2 pretreatment was evaluated for the efficient removal of malathion contained in CropWW. In the first stage, 90 min UV irradiation time (UV IR) and 65 mM hydrogen peroxide (H2O2) were identified as optimal operation parameters through a central composite design. The second stage consisted of CW planted with Phragmites australis collected from the agricultural discharge area and operated as a piston flow reactor. Furthermore, CW hydraulic residence times (HRT) of 1, 2 and 3 days, including hydraulic coupling, were evaluated. The removal efficiencies obtained in the first stage (UV/H2O2) were 94 ± 2.5% of malathion and 45 ± 2.5% of total organic carbon (TOC). In stage two (CW) 65 ± 9.6% TOC removal was achieved during the first 17 days, from which around 24% was associated to the biosorption of malathion byproducts. Subsequently, and until the operation ends, CW removed about 80% of TOC for 2 and 3 days HRT, with no significant differences (p > 0.2), which is higher than those reported in several studies involving only advanced oxidation processes (AOP) with UV IR times above 240 min and even for systems using catalysts. The results obtained indicate that the system UV/H2O2-CW is a technically suitable option for the treatment of CropWW with a high content of malathion mainly found in developing countries. Moreover, the hybrid system proposed also represent significant reduction in the size of the treatment plant.

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Section: Appl Sci 2020 10 X For Peer Review 10 Of 14mentioning

confidence: 99%

Efficient Malathion Removal in Constructed Wetlands Coupled to UV/H2O2 Pretreatment

et al. 2020

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Mechanistic understanding of the pollutant removal and transformation processes in the constructed wetland system

Malyan

Yadav

Sonkar

et al. 2021

Water Environment Research

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Constructed wetland systems (CWs) are biologically and physically engineered systems to mimic the natural wetlands which can potentially treat the wastewater from the various point and nonpoint sources of pollution. The present study aims to review the various mechanisms involved in the different types of CWs for wastewater treatment and to elucidate their role in the effective functioning of the CWs. Several physical, chemical, and biological processes substantially influence the pollutant removal efficiency of CWs. Plants species Phragmites australis, Typha latifolia, and Typha angustifolia are most widely used in CWs. The rate of nitrogen (N) removal is significantly affected by emergent vegetation cover and type of CWs. Hybrid CWs (HCWS) removal efficiency for nutrients, metals, pesticides, and other pollutants is higher than a single constructed wetland. The contaminant removal efficiency of the vertical subsurface flow constructed wetlands (VSSFCW) commonly used for the treatment of domestic and municipal wastewater ranges between 31% and 99%. Biochar/zeolite addition as substrate material further enhances the wastewater treatment of CWs. Innovative components (substrate materials, plant species) and factors (design parameters, climatic conditions) sustaining the long‐term sink of the pollutants, such as nutrients and heavy metals in the CWs should be further investigated in the future. Practitioner points Constructed wetland systems (CWs) are efficient natural treatment system for on‐site contaminants removal from wastewater. Denitrification, nitrification, microbial and plant uptake, sedimentation and adsorption are crucial pollutant removal mechanisms. Phragmites australis, Typha latifolia, and Typha angustifolia are widely used emergent plants in constructed wetlands. Hydraulic retention time (HRT), water flow regimes, substrate, plant, and microbial biomass substantially affect CWs treatment performance.

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Constructed wetlands for the removal of organic micropollutants from wastewater: Current status, progress, and challenges

Kushwaha,

Goswami,

Kim

et al. 2024

Chemosphere

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Mitigation of Wastewater-Borne Chorpyrifos in Constructed Wetlands: an Ecological Suitability Assessment by Macrophyte and Microbial Responses

Cited by 6 publications

References 36 publications

Efficient Malathion Removal in Constructed Wetlands Coupled to UV/H2O2 Pretreatment

Efficient Malathion Removal in Constructed Wetlands Coupled to UV/H2O2 Pretreatment

Mechanistic understanding of the pollutant removal and transformation processes in the constructed wetland system

Constructed wetlands for the removal of organic micropollutants from wastewater: Current status, progress, and challenges

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