Hydroxylated Atrazine Degradation Products in a Small Missouri Stream

Lerch, Robert N.; Donald, William W.; Li, Yongxi; Alberts, E. E.

doi:10.1021/bk-1996-0630.ch019

Cited by 18 publications

(28 citation statements)

References 15 publications

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“…This may explain the low detection frequency of DEA in this study. The prevalence of HA was also found in other watersheds like Missouri streams, although it is the least mobile degradation product (Lerch et al, 1995(Lerch et al, , 1998. The high winter concentration of HA in the Yangtze River was possibly caused by enhanced direct photolysis of atrazine due to lower water Table S1.…”

Section: Pesticidesmentioning

confidence: 75%

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Müller

Pernet-Coudrier

et al. 2014

Science of The Total Environment

105

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• The Yangtze River drains 40% of China's mainland with 400 million inhabitants • Monthly concentrations and annual loads of organic pollutants were determined • Seasonality of loads of PAHs, most pesticides, and antiinfectives were concise • In spite of low concentrations due to high water discharge, pollutant loads are considerable a b s t r a c t a r t i c l e i n f o Twenty percent of the water run-off from China's land surface drains into the Yangtze River and carries the sewage of approximately 400 million people out to sea. The lower stretch of the Yangtze therefore offers the opportunity to assess the pollutant discharge of a huge population. To establish a comprehensive assessment of micropollutants, river water samples were collected monthly from May 2009 to June 2010 along a crosssection at the lowermost hydrological station of the Yangtze River not influenced by the tide (Datong Station, Anhui province). Following a prescreening of 268 target compounds, we examined the occurrence, seasonal variation, and annual loads of 117 organic micropollutants, including 51 pesticides, 43 pharmaceuticals, 7 household and industrial chemicals, and 16 polycyclic aromatic hydrocarbons (PAHs). During the 14-month study, the maximum concentrations of particulate PAHs (1-5 μg/g), pesticides (11-284 ng/L), pharmaceuticals (5-224 ng/L), and household and industrial chemicals (4-430 ng/L) were generally lower than in other Chinese rivers due to the dilution caused of the Yangtze River's average water discharge of approximately 30,000 m 3 /s. The loads of most pesticides, anti-infectives, and PAHs were higher in the wet season compared to the dry season, which was attributed to the increased agricultural application of chemicals in the summer, an elevated water discharge through the sewer systems and wastewater treatment plants (WWTP) as a result of high hydraulic loads and the related lower treatment efficiency, and seasonally increased deposition from the atmosphere and runoff from the catchment. The estimated annual load of PAHs in the river accounted for some 4% of the total emission of PAHs in the whole Yangtze Basin. Furthermore, by using sucralose as a tracer for domestic wastewater, we estimate a daily disposal of approximately 47 million m 3 of sewage into the river, corresponding to 1.8% of its average hydraulic load. In summary, the annual amounts flushed by the Yangtze River into the East China Sea were 2.9 × 10 6 tons of dissolved and particulate organic carbon (DOC and POC), 369 tons of PAHs, 98 tons of pesticides, 152 tons of pharmaceuticals, and 273 tons of household and industrial chemicals. While the concentrations seem comparably moderate, the pollutant loads are considerable and pose an increasing burden to the health of the marine coastal ecosystem.

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Section: Pesticidesmentioning

confidence: 75%

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Müller

Pernet-Coudrier

et al. 2014

Science of The Total Environment

105

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“…Dentre os poluentes que apresentam maior potencial contaminante ao ambiente destacam-se os herbicidas de longa atividade residual nos solos, podendo-se citar os princípios ativos picloram, tebuthiuron, sulfentazone, imazapyr, imazaquin e trifloxysulfuronsodium, entre os mais problemáticos. Efeitos negativos como a toxicidade a organismos não-alvo (ROUSSEAUX et al, 2003); a lixiviação aos lençóis freáticos GOOLSBY, 1996;BLANCHARD;THRUMAN, 1998;LERCH et al, 1995;THURMAN et al, 1992); o carreamento junto às partículas de argila ou de matéria orgânica, resultando na deposição em cursos hídricos superficiais (BARRA et al, 1999;KRUTZ et al, 2005;PALMA et al, 2004); e a intoxicação em culturas sensíveis semeadas em seqüência na mesma área (carryover) (BRIGHENTI et al, 2002;JAKELAITIS et al, 2006;VILLA et al, 2006), são exemplos que podem ocorrer após a utilização desses insumos químicos. No Brasil, programas de fitorremediação dos herbicidas trifloxysulfuronsodium e tebuthiuron já se encontram em níveis mais avançados (PIRES et al, , 2005bPROCÓPIO et al, 2005aPROCÓPIO et al, , 2005bPROCÓPIO et al, , 2007SANTOS et al, 2004).…”

Section: Introductionunclassified

Efeito da densidade populacional de Panicum maximum (cultivar Tanzânia) na fitorremediação de solo contaminado com o herbicida picloram

et al. 2009

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ResumoO objetivo desse trabalho foi avaliar a influência da densidade populacional de Panicum maximum (cultivar Tanzânia) sobre a fitorremediação de solo contaminado com o herbicida picloram. O experimento foi conduzido em casa-de-vegetação, de setembro de 2006 a fevereiro de 2007. Os tratamentos foram compostos pela combinação entre quatro densidades populacionais da espécie vegetal Panicum maximum (cultivar Tanzânia) (0, 5, 10 e 15 plantas por vaso, equivalentes a 0, 122, 244 e 366 plantas m 2 , respectivamente) e de três doses do picloram (0, 80 e 160 g ha -1 aplicadas diretamente nos vasos, simulando níveis de contaminação do solo). Após o cultivo da espécie fitorremediadora por 100 dias, efetuou-se, no próprio vaso, a semeadura da espécie bioindicadora da presença do picloram, soja (cultivar Monsoy 6101), na qual foram avaliadas a fitotoxicidade, a altura de plantas e a massa verde e seca da parte aérea. A densidade populacional da espécie fitorremediadora Tanzânia influenciou o nível de fitotoxicidade do herbicida picloram sobre a cultura da soja semeada em sucessão. Das densidades populacionais avaliadas, 122 plantas m -2 foi a mais eficiente na descontaminação do solo. Palavras-chave: Residual de herbicidas, descontaminação do solo, Glycine max

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“…Hydroxyatrazine was detected as a major metabolite at a concentration of 10(±3) µg l -1 , similar to that of the residual atrazine. Previous investigations in aquifers (surface water and watersaturated soil) also found hydroxyatrazine to be the principal product of degradation (Lerch et al, 1995;Mersie et al, 1998). Some authors attribute the formation of hydroxyatrazine to photolytic hydrolysis in surface water (Kolpin and Kalkhoff, 1993).…”

Section: Atrazine and Metabolites In The Sediment Model Systemmentioning

confidence: 96%

Microbiological impact of atrazine pollution in river sediment and soil

Vargha

Somlai

Takáts

et al. 2004

Acta Agronomica Hungarica

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Atrazine is a frequently detected pollutant in agricultural soils, groundwater and surface waters. Microbial degradation was confirmed in soils, and recently several atrazine-degrading bacteria have been isolated. Degradation in aquifers, however, is not well understood, and to date, atrazine degraders have not been isolated from water. In the present study, the impact of atrazine was assessed in agricultural soil and river sediment and the composition of the atrazine-degrading bacterial community in the soil and sediment was compared. Atrazine pollution increased the number and diversity of the endogenous atrazine degraders in both environments. Proteobacteria were predominant atrazine degraders in soils, whereas the community of atrazine-degrading bacteria in sediment consisted mostly of coryneforms.

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Hydroxylated Atrazine Degradation Products in a Small Missouri Stream

Cited by 18 publications

References 15 publications

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Organic micropollutants in the Yangtze River: Seasonal occurrence and annual loads

Efeito da densidade populacional de Panicum maximum (cultivar Tanzânia) na fitorremediação de solo contaminado com o herbicida picloram

Microbiological impact of atrazine pollution in river sediment and soil

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