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首页> 外文期刊>Journal of Environmental Science and Health >Effect of lixiviated sediments affected with treated water on Selenastrum capricornutum, Printz and Origanum vulgare L.
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Effect of lixiviated sediments affected with treated water on Selenastrum capricornutum, Printz and Origanum vulgare L.

机译：处理过的水对沥干的沉积物的影响对小枝硒，Printz和牛至的影响。

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摘要

Xochimilco is an area of Mexico City fulfilling important ecological functions. However, the water of the canal network in the lacustrine zone of Xochimilco is supplied by the water treatment plants of the city, implying a risk of accumulated contaminants in the sediments. This study reports the effect of lixiviates obtained from sediments collected in the canals of Xochimilco on the growth of the alga Selenastrum capricornutum and the angiosperm Origanum vulgare. Three factors were tested: (a) water source in terms of the effluent from the two water treatment plants (urban waste-water, located at Cerro de la Estrella (CE) and urban-rural waters at San Luis Tlaxialtemalco (SLT); (b) sampling season (January, dry season; May and September, rainy season; and (c) distances from the water discharge point in the Xochimilco's main canal (5200 and 1000 m for CE, and 0, 200 m for SLT). The chemical water properties analyzed were: pH, electrical conductivity, N-NO_3, N-NH_3, N_(Totai), P-PO_4 and P_(Total). The alga was more sensitive to the contaminants than O. vulgare, showing growth inhibition of 93-100%. The effect of sampling season on the inhibition of algal growth was ordered as follows: September>May>January. Lixiviates obtained from sediment samples 200 and 1000 m from the main point of water discharge caused a higher algal growth inhibition than the samples obtained at the source point. Lixiviate promoted the growth of seedlings of O. vulgare.
机译：霍奇米尔科（Xochimilco）是具有重要生态功能的墨西哥城地区。但是，霍奇米尔科湖区的运河网络水是由城市的水处理厂提供的，这意味着存在沉积物中污染物积累的风险。这项研究报告了从霍奇米尔科运河中收集的沉积物获得的浸出液对藻荚丝荚len和被子植物牛至的生长的影响。测试了三个因素：（a）从两个水处理厂（城市废水，位于埃斯特拉（Cerro de la Estrella）（CE）和圣路易斯Tlaxialtemalco（SLT）的城乡水）中得出的废水来源； b）采样季节（1月，旱季； 5月和9月，雨季；以及（c）距霍奇米尔科主干渠的排水点的距离（CE分别为5200和1000 m，SLT为0、200 m）。分析的化学水性质为：pH，电导率，N-NO_3，N-NH_3，N_（Totai），P-PO_4和P_（Total）。藻类比普通小球藻对污染物更敏感，显示出对水藻的生长抑制作用。 93-100％。采样季节对藻类生长的抑制作用的顺序为：9月> 5月> 1月，从排水点200和1000 m处的沉积物样品中提取的脂溢液对藻类生长的抑制作用大于利希韦特促进了豆荚幼苗的生长。

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