Removal of urban-use insecticides in a large-scale constructed wetland

Cryder, Zachary; Wolf, D. C.; Carlan, Craig; Gan, Jay

doi:10.1016/j.envpol.2020.115586

Cited by 30 publications

(26 citation statements)

References 47 publications

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“…Since water and the associated suspended solids were all that entered and exited the OWWP system, these results indicate that the OWWP effectively reduced the levels of fiproles and pyrethroids, often in a statistically significant manner. Previous research demonstrated the efficacy of the constructed wetlands in removing pyrethroids and fiproles, although the wetland cells contained vegetation and possessed diverse configurations. ,,, …”

Section: Results and Discussionmentioning

confidence: 99%

“…Constructed wetlands are a low-cost and environmentally friendly option for removing trace contaminants and improving water quality . There is a great deal of evidence in the literature demonstrating the efficacy of constructed wetlands in the removal of nutrients, trace elements, antibiotic resistance genes, and organic contaminants. ,− However, most recent studies have only considered vegetated wetlands where vegetative filtration, plant uptake, and enhanced degradation in the rhizosphere play significant roles in contaminant retention and attenuation . Vegetated wetlands have drawbacks such as the need to remove vegetation periodically to prevent overgrowth, clogging, channelization, accumulation, and decomposition of organic matter and strong seasonal performance dependence.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Urban-Use Insecticides in a Large Open-Water Wetland Pond

et al. 2022

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Worsening freshwater scarcity has heightened the need for treatment technologies capable of eliminating chemical and biological contaminants to allow for the beneficial use of traditionally underutilized water resources. In urbanized arid and semiarid regions such as California, urban drainage represents an increasingly important water source for augmenting water supply. However, monitoring shows that urban streams are contaminated ubiquitously with urban-use insecticides (e.g., pyrethroids and fipronil) that have broad-spectrum toxicity. In this study, a large open-water wetland pond (OWWP), characterized by shallow water depth and the absence of permanent vegetation, was evaluated for the removal of pyrethroids and fipronil (and its biologically active degradates). Concentration-based removal and changes in the pesticide mass flux were calculated to determine the efficacy of the OWWP. Toxic units for indicator aquatic invertebrates were estimated before and after the OWWP treatment to determine reductions in potential aquatic toxicity. Contaminant concentrations in water and sediment consistently decreased as the water was moving through the OWWP. Concentration-based removals were 44.2–100% for fipronil compounds, 61.8–100% for bifenthrin, and 47.3–92.7% for cyfluthrin, and the removal was attributed to sedimentation, in situ microbial degradation, and photolysis. The mitigation of these urban-use insecticides by the OWWP was similar to that of a densely vegetated constructed wetland at the same site. Therefore, OWWPs represent a low-maintenance and effective wetland configuration for large-scale water reclamation and may be particularly useful for arid and semiarid regions with favorable meteorological conditions (e.g., intense sunshine and high temperature).

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of Urban-Use Insecticides in a Large Open-Water Wetland Pond

et al. 2022

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“…In the same study, the hydraulic retention time and sedimentation showed a direct correlation with pesticide removal in CWs. Plant uptake and sedimentation were also reported to be positively linked with the rate of pesticide removal in CWs (Cryder et al, 2021). In SSFCW, the high nutrient load was found to have a negative correlation with pesticide removal while soda saline‐alkaline amendment has the opposite (Yu et al, 2019).…”

Section: Classification Of Cwsmentioning

confidence: 99%

“…In SSFCW, the high nutrient load was found to have a negative correlation with pesticide removal while soda saline‐alkaline amendment has the opposite (Yu et al, 2019). In urban wastewater, a full‐scale CWs can effectively remove a range of pesticides, such as cyfluthrin, bifenthrin, fipronil sulfide, fipronil, fipronil sulfide, and fipronil desulfinyl by 36.6%–82.2%, 74.7%–100%, 75.6%–100%, 57.8%–88.1%, 99.7%–100%, and 100% respectively, mainly through sedimentation (Cryder et al, 2021). Tang et al (2019) investigated the effect of five plant species ( Canna indica , Juncus effusus , Cyperus alternifolius , Iris pseudacorus , and Typha orientalis ) on the removal of chlorpyrifos in recirculating VSSFCW.…”

Section: Classification Of Cwsmentioning

confidence: 99%

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 (CWs), which are artificially simulated to follow the operation patterns of natural wetlands, are a comprehensive ecological treatment technology for decontaminating sewage [13]. Owing to their cost, operation convenience, low management expense, high efficiency, and general applicability, CWs are widely used in the treatment of municipal domestic wastewater worldwide as they can effectively remove excess ammonia in water bodies and most organic matter, and they also have a certain aesthetic value [14][15][16][17]. The important compositions of CWs are plants, substrates, and microorganisms [18].…”

Section: Introductionmentioning

confidence: 99%

Purification Effects on β-HCH Removal and Bacterial Community Differences of Vertical-Flow Constructed Wetlands with Different Vegetation Plantations

et al. 2021

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This study aimed to investigate the removal of β-hexachlorocyclohexane (β-HCH) at realistic concentration levels (10 µg/L) in different plant species in constructed wetlands (Acorus calamus, Canna indica, Thalia dealbata, and Pontederia cordata) and the structure of the rhizosphere microbial community response of each group during summer and winter. Results showed that all groups of constructed wetlands had very good decontamination efficiency against β-HCH in water (90.86–98.17%). The species that most efficiently purified β-HCH in water was A. calamus in summer (98.17%) and C. indica in winter (96.64%). Substrate sorption was found to be the major pathway for β-HCH removal from water in the constructed wetlands. The ability of the wetland plants to absorb and purify β-HCH was limited, and C. indica had the strongest absorptive capacity among the four plant species. The mean β-HCH removal from the matrix of the planted plants increased by 5.8% compared with that of the control treatment (unplanted plants). The average β-HCH content in the plant rhizosphere substrate was 4.15 µg/kg lower than that in the non-rhizosphere substrate. High-throughput sequencing analysis revealed significant differences (P < 0.05) in the Chao1 and ACE indices of microbes in the substrate of four wetlands during summer and winter. At the genus level, the constructed wetlands with vegetation plantations showed higher microbial abundance than the constructed wetlands without vegetation plantations. In winter, the bacterial community structure of each constructed wetland was quite different, but no dominant flora in the bacterial community structure obviously changed. In summer, the bacterial community structure at the same stage was relatively small. The abundance of Actinobacteria and Sphingomonas remarkably increased over time in summer.

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Removal of urban-use insecticides in a large-scale constructed wetland

Cited by 30 publications

References 47 publications

Removal of Urban-Use Insecticides in a Large Open-Water Wetland Pond

Removal of Urban-Use Insecticides in a Large Open-Water Wetland Pond

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

Purification Effects on β-HCH Removal and Bacterial Community Differences of Vertical-Flow Constructed Wetlands with Different Vegetation Plantations

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