Risk assessment of an organochlorine pesticide mixture in the surface waters of Qingshitan Reservoir in Southwest China

Zeng, Honghu; Fu, Xin; Liang, Yanpeng; Qin, Li-Tang; Mo, Ling-Yun

doi:10.1039/c8ra01881b

Cited by 37 publications

(12 citation statements)

References 42 publications

(52 reference statements)

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“…Methoxychlor is an alternative for p,p′-DDT and had been increasingly used from the 1970s (Oh, 2009) until being banned in Europe (2002) and the United States (2003) (Neves et al, 2018). However, methoxychlor can still be detected in some provinces of China, southeastern Asia, and South Africa (Luo et al, 2016;Neves et al, 2018;Zeng et al, 2018). Methoxychlor has been well studied in snow, ice core, air, freshwater, and biota bodies but rarely in seawater (Hoferkamp et al, 2010).…”

Section: Quality Assurance and Quality Controlmentioning

confidence: 99%

Spatial Distributions and Seasonal Changes of Current‐Use Pesticides from the North Pacific to the Arctic Oceans

et al. 2019

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Distributions of eight targeted current‐use pesticides (CUPs) chloroneb, simazine, atrazine, alachlor, dacthal, chlorobenzilate, methoxychlor, and permethrin were investigated in seawater and the atmosphere in a region covering the North Pacific to the Arctic Oceans during the 7th and 8th Chinese National Arctic Research Expedition (2016 and 2017) voyages of the research vessel R/V Xuelong (Snow Dragon in English). Total CUP concentrations in seawater have prominent seasonal and latitudinal trends, with higher concentrations occurring at lower latitudes in early summer. The major contributors of the CUPs (∑8CUP) did not alter over different seasons with dominant chloroneb, alachlor, and atrazine accounting for more than 90%, but their concentrations did have marked seasonal changes. However, the compositions of the eight analyzed CUPs varied indistinctly between seasons indicating a possible combined environmental impact on these compounds rather than the effects of individual chemical properties. Three‐day backward air mass trajectories indicate that atmospheric masses from northeastern China are responsible for the high concentrations of CUPs in East China and Japan Seas, whereas those from the North Atlantic Ocean contribute to the low levels in local area. Fugacity ratios indicate potential volatilization and equilibrium of chloroneb in the Canada Basin of the Arctic Ocean and Japan Sea, respectively, and deposition of other CUPs in both regions. However, atmospheric concentrations are decoupled from those in seawater, which indicates a low exchange rate.

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Section: Quality Assurance and Quality Controlmentioning

confidence: 99%

Spatial Distributions and Seasonal Changes of Current‐Use Pesticides from the North Pacific to the Arctic Oceans

et al. 2019

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“…Other four types of POPs were all undetected in the water reuse system. Although China has forbidden the usage of HCHs and DDT for over 30 years, they are still detected in different media (Jiang et al, 2009;Qadeer et al, 2019) with low concentrations of 0.004-62.84 ng/L and 0.003-248.45 ng/L (Hu et al, 2014;Montuori et al, 2016;Zeng et al, 2018), respectively. The concentration of HCHs detected met the standards for drinking water quality in China (5 μg/L) (The Ministry of Health, China, 2006).…”

Section: Resultsmentioning

confidence: 99%

Occurrence and risk assessment of emerging contaminants in a water reclamation and ecological reuse project

Lin

Keller

et al. 2020

Science of The Total Environment

100

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Water reclamation and ecological reuse is gradually becoming a popular solution to address the high pollutant loads and insufficient ecological flow of many urban rivers. However, emerging contaminants in water reuse system and associated human health and ecological risks need to be assessed. This study determined the occurrence and human health and ecological risk assessments of 35 emerging contaminants during one year, including 5 types of persistent organic pollutants (POPs), 5 pharmaceutical and personal care products (PPCPs), 7 endocrine disrupting chemicals (EDCs) and 18 disinfection by-products (DBPs), in a wastewater treatment plant (WWTP) and receiving rivers, as well as an unimpacted river for comparison. Results showed that most of PPCPs and EDCs, especially antibiotics, triclosan, estrogens and bisphenol A, occurred frequently at relatively high concentrations, and they were removed from 20.5% to 88.7% with a mean of 58.9% via WWTP. The highest potential noncarcinogenic and carcinogenic risks in different reuse scenarios were assessed using maximal detected concentrations, all below the acceptable risk limits, with the highest total combined risk value of 9.21 × 10 −9 and 9.98 × 10 −7 , respectively. Ecological risk assessment was conducted using risk quotient (RQ) method and indicated that several PPCPs, EDCs and haloacetonitriles (HANs) pose high risk (RQ N 1) to aquatic ecology in the rivers, with the highest RQ up to 83.8. The study suggested that ecological risks need to be urgently addressed by updating and optimizing the process in WWTPs to strengthen the removal efficiencies of emerging contaminants.

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“…The highest RQ values of the antibiotics were selected to perform a conservative risk assessment (Figure 7a). The range and average RQ values of the nine antibiotics detected in the Cheongmi Stream watershed were 1.3 × 10 −5 -2.3, and 0.356, respectively, and these could be further classified as low (RQ < 0.1), medium (0.1 < RQ < 1), and high risk (RQ > 1) [44][45][46]. The RQ values of six of the ten antibiotics were considered low risk (<0.1); however, the RQs for SMZ, SMX, and TMP were relatively high, peaking in the spring and reaching its minimum value in the summer, likely resulting from the seasonal variations in the environmental concentrations of the antibiotics.…”

Section: Ecological Risk Assessment Of Surface Water Antibioticsmentioning

confidence: 99%

Concentrations and Risk Assessments of Antibiotics in an Urban–Rural Complex Watershed with Intensive Livestock Farming

Lee

Kim

Kim³

et al. 2021

IJERPH

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Antibiotics used for the treatment of humans and livestock are released into the environment, whereby they pose a grave threat to biota (including humans) as they can cause the emergence of various strains of resistant bacteria. An improved understanding of antibiotics in the environment is thus vital for appropriate management and mitigation. Herein, surface water and groundwater samples containing antibiotics were analyzed in an urban–rural complex watershed (Cheongmi Stream) comprising intensive livestock farms by collecting samples across different time points and locations. The spatiotemporal trends of the residual antibiotics were analyzed, and ecological and antibiotic resistance-based risk assessments were performed considering their concentrations. The results showed that the concentrations and detection frequencies of the residual antibiotics in the surface water were affected by various factors such as agricultural activities and point sources, and were higher than those found in groundwater; however, frequent detection of antibiotics in groundwater showed that residual antibiotics were influenced by factors such as usage pattern and sewage runoff. Furthermore, few antibiotics posed ecological risks. The risk assessment methods adopted in this study can be applied elsewhere, and the results can be considered in the environmental management of residual antibiotics in the Cheongmi Stream watershed.

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Risk assessment of an organochlorine pesticide mixture in the surface waters of Qingshitan Reservoir in Southwest China

Abstract: Risk assessment of single pollutants has been extensively studied.

Cited by 37 publications

References 42 publications

Spatial Distributions and Seasonal Changes of Current‐Use Pesticides from the North Pacific to the Arctic Oceans

Spatial Distributions and Seasonal Changes of Current‐Use Pesticides from the North Pacific to the Arctic Oceans

Occurrence and risk assessment of emerging contaminants in a water reclamation and ecological reuse project

Concentrations and Risk Assessments of Antibiotics in an Urban–Rural Complex Watershed with Intensive Livestock Farming

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