Metal contamination of a riparian area in the Conchos watershed of Chihuahua, Mexico
Metal contamination of a riparian area in the Conchos watershed of Chihuahua, Mexico
复制标题
DOI：
10.2495/wrm050281
复制
发表时间：
2005-03
期刊：
影响因子：
--
通讯作者：
H. Rubio-Arias;R. Saucedo;K. Wood;A. Núñez
中科院分区：
文献类型：
--
作者：
H. Rubio-Arias;R. Saucedo;K. Wood;A. Núñez
这项研究调查了墨西哥奇瓦瓦科乔斯分水岭河岸地区六个点土壤中的金属污染水平。土壤样品采集自表层(0-15 cm)和两个亚表层(15-30 cm和30-50 cm)。用火焰原子吸收光谱法测定镉、钠、锰、铅、铜、铁、锌的含量，用氢化物发生原子吸收光谱法计算砷、汞的含量。同时测定了土壤pH值、有机质(%)、CaCO3(%)、Hcc、Ce、N-NO3(以kg ha计)、P和K。沙拉戈萨点的砷含量较高，最高值为2.3192 ppm。汞、锰和钠没有表现出特定的趋势，但汞的浓度在0.2381到1.2715 ppm之间，高于典型土壤中的值(0.03到0.2mgkg)。所有样本的镉含量均低于9ppm。在城市中心附近，0-15厘米土层中铅和锌的浓度较高，分别达到36.8ppm和68.8ppm。PH值在7.08~7.70之间。这项研究表明，墨西哥北部最重要的流域之一的河岸地区的土壤超过了令人满意的水平。墨西哥。卢比奥·阿里亚斯，R.A.Saucedo，K.Wood，A.Nunez©2005 Wit Press Wit Press On Ecology and the Environment，Vol 80，www.witpress.com，ISSN 1743-3541(在线)
This study investigated metal contamination levels in soils at six points along a riparian area of the Conchos watershed in Chihuahua, Mexico. Soil samples were collected from the surface horizon (0-15 cm) as well as from two subsurface horizons (15-30 cm and 30-50 cm). Cadmium, sodium, manganese, lead, copper, iron and zinc concentrations were determined by flame atomic absorption spectrometry while arsenic and mercury concentrations were calculated by hydrourous-generator atomic absorption spectrometry. Also measured were pH, M.O.(%), CaCO3(%), H.C., CE, N-NO3 (as Kg ha), P, and K. Arsenic values were higher in the Zaragoza point with the highest value of 2.3192 ppm in the upper soil horizon. Mercury, manganese, and sodium did not show a specific trend, however mercury concentrations ranged from 0.2381 to 1.2715 ppm and were higher than those values that were present in a typical soil (0.03 to 0.2 mg kg). Cadmium levels were less than 9 ppm in all samples. Lead and zinc concentrations were higher in the site near an urban center reaching values of 36.8 ppm and 68.8 ppm, respectively, in the 0-15 cm horizon. The pH ranged from 7.08 to7.70. This study showed that soils in the riparian areas of one of the most important watersheds in northern Mexico are above desirable levels. Mexico. H. Rubio Arias , R. A. Saucedo , K. Wood , A. Nunez © 2005 WIT Press WIT Transactions on Ecology and the Environment, Vol 80, www.witpress.com, ISSN 1743-3541 (on-line)