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Analysis of chemical contamination within a canal in a Mexican border colonia

机译：分析墨西哥边境殖民地的运河内的化学污染

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摘要

This study examines urban pollution within Derechos Humanos, a colonia popular in Matamoros, Tamaulipas, Mexico. General water quality indicators (coliform bacteria, total dissolved solids, ecologically relevant cations and anions), heavy metals (copper, lead, nickel, zinc, iron and cadmium), and volatile organic compounds (benzene, toluene, ethylbenzene, styrene, and dichloroben-zene and xylene isomers) were quantified within a wastewater canal running adjacent to the community. Water samples were collected at multiple sites along the banks of the canal and evidence of anthropogenic emissions existed at each sampling location. Sample site 2, approximately 10 m upstream of the colonia, contained both the widest range of hazardous pollutants and the greatest number exceeding US Environmental Protection Agency surface water standards. At each sampling location, high concentrations of total coliform (> 10~4 colonies/100 mL sample), lead (ranging from 0.05 to 0.40 mg/L), nickel (levels from 0.21 to 1.45 mg/L), and benzene (up to 9.80 mg/L) were noted.
机译：这项研究调查了Derechos Humanos内的城市污染，Derechos Humanos是在墨西哥Tamaulipas的Matamoros流行的一个殖民地。一般水质指标（大肠菌，总溶解固体，生态相关的阳离子和阴离子），重金属（铜，铅，镍，锌，铁和镉）和挥发性有机化合物（苯，甲苯，乙苯，苯乙烯和二氯苯） -zene和二甲苯异构体）在邻近社区的废水渠中进行了定量。在运河两岸的多个地点收集了水样，每个采样点都存在人为排放的证据。在菌落上游约10 m处的采样点2中，既包含最广泛的有害污染物，又包含超过美国环境保护署地表水标准的最大数量。在每个采样位置，高浓度的总大肠菌群（> 10〜4个菌落/ 100 mL样品），铅（浓度范围从0.05至0.40 mg / L），镍（浓度范围从0.21至1.45 mg / L）和苯（浓度高）至9.80 mg / L）。

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