Watershed-scale modeling on the fate and transport of polycyclic aromatic hydrocarbons (PAHs)

Ligaray, Mayzonee; Baek, Sang Soo; Kwon, Hye-Ok; Choi, Sung-Deuk

doi:10.1016/j.jhazmat.2016.08.063

Cited by 42 publications

(14 citation statements)

References 37 publications

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“…Figure 3 shows the schematic diagram of the fate and transport of the pesticides for the modified SWAT pesticide model. The modified model applied in this study was based on the watershed-scale model from a previous study of the same authors about modeling the fate and transport of polycyclic aromatic hydrocarbons (PAH) and linking the PAH model with SWAT [36]. This study further developed the model to include the pesticide application based on the original SWAT model and other equations related to the fate and transport of pesticides.…”

Section: Original Swat Pesticide Modelmentioning

confidence: 99%

“…[DOC] = f DOC × OM (12) where r sw is the soil-to-water ratio (kg•L −1 ), K sw is the soil-water distribution coefficient [L•kg −1 ], K DOC is the dissolved organic carbon-water partition coefficient (L•kg −1 ), f DOC is the fraction of DOC, and OM is the concentration of the organic matter (kg•L −1 ). OM was calculated by dividing the mass of the soil carbon in the soil organic matter with the water yield, which were both simulated by the original SWAT model [36]. C bs p , C bs fd , and C bs D•C from Equation (9) can also be determined by using the pesticide in bulk soil fractions [36,38]:…”

Section: Pesticides On Soilmentioning

confidence: 99%

“…OM was calculated by dividing the mass of the soil carbon in the soil organic matter with the water yield, which were both simulated by the original SWAT model [36]. C bs p , C bs fd , and C bs D•C from Equation (9) can also be determined by using the pesticide in bulk soil fractions [36,38]:…”

Section: Pesticides On Soilmentioning

confidence: 99%

“…Surface runoff of the suspended particles to the channel was also considered in the wash off loads and wash off fractions of the pesticide. The suspended particles affected by the wash off mechanism are described in the following equations [36]:…”

Section: Pesticides On Soilmentioning

confidence: 99%

“…The pesticides in the channels are then subjected to the following mechanisms and processes due to water movement and reactivity of the pesticide with other components present in the water: advection, dispersion, photodegradation, and settling processes upon entering the channel [36]. The concentration of the pesticide in the waterbody was determined after considering these processes.…”

Section: Pesticides In Watermentioning

confidence: 99%

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Modeling the Fate and Transport of Malathion in the Pagsanjan-Lumban Basin, Philippines

Ligaray

Kim

Baek

et al. 2017

Water

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Exposure to highly toxic pesticides could potentially cause cancer and disrupt the development of vital systems. Monitoring activities were performed to assess the level of contamination; however, these were costly, laborious, and short-term leading to insufficient monitoring data. However, the performance of the existing Soil and Water Assessment Tool (SWAT model) can be restricted by its two-phase partitioning approach, which is inadequate when it comes to simulating pesticides with limited dataset. This study developed a modified SWAT pesticide model to address these challenges. The modified model considered the three-phase partitioning model that classifies the pesticide into three forms: dissolved, particle-bound, and dissolved organic carbon (DOC)-associated pesticide. The addition of DOC-associated pesticide particles increases the scope of the pesticide model by also considering the adherence of pesticides to the organic carbon in the soil. The modified SWAT and original SWAT pesticide model was applied to the Pagsanjan-Lumban (PL) basin, a highly agricultural region. Malathion was chosen as the target pesticide since it is commonly used in the basin. The pesticide models simulated the fate and transport of malathion in the PL basin and showed the temporal pattern of selected subbasins. The sensitivity analyses revealed that application efficiency and settling velocity were the most sensitive parameters for the original and modified SWAT model, respectively. Degradation of particulate-phase malathion were also significant to both models. The rate of determination (R 2) and Nash-Sutcliffe efficiency (NSE) values showed that the modified model (R 2 = 0.52; NSE = 0.36) gave a slightly better performance compared to the original (R 2 = 0.39; NSE = 0.18). Results from this study will be able to aid the government and private agriculture sectors to have an in-depth understanding in managing pesticide usage in agricultural watersheds.

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Section: Original Swat Pesticide Modelmentioning

confidence: 99%

Section: Pesticides On Soilmentioning

confidence: 99%

Section: Pesticides On Soilmentioning

confidence: 99%

Section: Pesticides On Soilmentioning

confidence: 99%

Section: Pesticides In Watermentioning

confidence: 99%

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Modeling the Fate and Transport of Malathion in the Pagsanjan-Lumban Basin, Philippines

Ligaray

Kim

Baek

et al. 2017

Water

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Accumulation of polycyclic aromatic hydrocarbons in the devitalized aquatic moss Fontinalis antipyretica: From laboratory to field conditions

et al. 2021

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This work aims to test the feasibility of a Fontinalis antipyretica devitalized moss clone to uptake and accumulate polycyclic aromatic hydrocarbons (PAHs) from surface waters. To assess the capability of the devitalized clone to accumulate PAHs, in the laboratory, moss was placed in water and spiked with increasing concentrations of 16 PAHs, and under field conditions, the moss was transplanted to 22 sites of Galicia (Spain) rivers. In general, PAH concentrations in water samples were lower than the maximum allowable concentrations from Directive 2013/39/EU, so the sampling sites did not show water PAH contamination. The exponential accumulation kinetic in the laboratory trial highlights a good capability of the devitalized moss clone to accumulate total PAHs. In field experiments, the hydrogeological conditions and the low emission sources caused low concentrations of PAHs in the water system and, consequently, in the transplants, although an enrichment can be observed for several PAHs. Overall, the devitalized clone of F. antipyretica can uptake and accumulate PAHs in water and may be useful in bioremediation strategies.

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Plant–Microbe Interactions for Bioremediation of Pesticides

Santos

Lima

Silva

et al. 2021

Rhizobiont in Bioremediation of Hazardous Waste

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Watershed-scale modeling on the fate and transport of polycyclic aromatic hydrocarbons (PAHs)

Cited by 42 publications

References 37 publications

Modeling the Fate and Transport of Malathion in the Pagsanjan-Lumban Basin, Philippines

Modeling the Fate and Transport of Malathion in the Pagsanjan-Lumban Basin, Philippines

Accumulation of polycyclic aromatic hydrocarbons in the devitalized aquatic moss Fontinalis antipyretica: From laboratory to field conditions

Plant–Microbe Interactions for Bioremediation of Pesticides

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