Analysis of Factors Involving Drinking Water Contamination by Glyphosate and/or Nitrate in Urban Areas

IF 0.7 Q4 CHEMISTRY, MULTIDISCIPLINARY

Orbital: The Electronic Journal of Chemistry Pub Date : 2022-09-27 DOI:10.17807/orbital.v14i3.17386

S. Dovidauskas, I. A. Okada, F. R. dos Santos, M. Okada, Rita de Cássia Briganti, M. A. Souto

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引用次数: 0

Abstract

This study investigated factors that could be related to drinking water contamination in urban areas in order to obtain quality profiles that characterized presence of the glyphosate and nitrate contaminants. Thus, in a period of one year, 4,853 tap water samples from 89 cities in the northeastern region of the State of São Paulo, Brazil, were analyzed in 21 physicochemical and 2 microbiological parameters. Additionally, 4 demographic variables were also included in multivariate data analysis. Principal Component Analysis of physicochemical and microbiological data showed that glyphosate concentration is positively correlated with nitrate concentration, especially in cities that make exclusive use of groundwater, besides correlating with conductivity and with concentrations of calcium, magnesium, fluoride, chloride, phosphate and free residual chlorine. The inclusion of demographic variables in Principal Component Analysis did not significantly change waters physicochemical profiles, but in cities that exclusive use groundwater for public supply the number of hospitalizations for diarrhea correlated positively with glyphosate, nitrate and chloride concentrations, in addition to conductivity. Linear Discriminant Analysis models involving 5 variables (conductivity and concentrations of calcium, magnesium, chloride and nitrate) were able to predict the cities vulnerability to groundwater contamination by nitrate.

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城市地区草甘膦和/或硝酸盐污染饮用水的因素分析

本研究调查了可能与城市地区饮用水污染有关的因素，以获得表征草甘膦和硝酸盐污染物存在的质量概况。因此，在一年的时间里，来自巴西圣保罗州东北部地区89个城市的4,853个自来水样本进行了21个理化参数和2个微生物参数的分析。此外，在多变量数据分析中还纳入了4个人口统计学变量。理化和微生物主成分分析数据表明，草甘膦浓度与硝酸盐浓度呈正相关，特别是在地下水专用城市，除了与电导率和钙、镁、氟化物、氯化物、磷酸盐和游离余氯浓度相关外。在主成分分析中纳入人口统计变量并没有显著改变水体的物理化学特征，但在公共供水只使用地下水的城市中，除电导率外，腹泻住院人数与草甘膦、硝酸盐和氯化物浓度呈正相关。基于电导率、钙、镁、氯、硝酸盐浓度等5个变量的线性判别分析模型能够预测城市地下水硝酸盐污染脆弱性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Orbital: The Electronic Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： Orbital: The Electronic Journal of Chemistry is a quarterly scientific journal published by the Institute of Chemistry of the Universidade Federal de Mato Grosso do Sul, Brazil. Original contributions (in English) are welcome, which focus on all areas of Chemistry and their interfaces with Pharmacy, Biology, and Physics. Neither authors nor readers have to pay fees. The journal has an editorial team of scientists drawn from regions throughout Brazil and world, ensuring high standards for the texts published. The following categories are available for contributions: 1. Full papers 2. Reviews 3. Papers on Education 4. History of Chemistry 5. Short communications 6. Technical notes 7. Letters to the Editor The Orbital journal also publishes a number of special issues in addition to the regular ones. The central objectives of Orbital are threefold: (i) to provide the general scientific community (at regional, Brazilian, and worldwide levels) with a formal channel for the communication and dissemination of the Chemistry-related literature output by publishing original papers based on solid research and by reporting contributions which further knowledge in the field; (ii) to provide the community with open, free access to the full content of the journal, and (iii) to constitute a valuable channel for the dissemination of Chemistry-related investigations.