title: [Situation and assessment of heavy metal pollution in river and mud in one city in Henan Province].
abstract: OBJECTIVE
  To study the heavy metal contamination status in river water and mud in the suburb of a city in Henan Province.
  
  
  METHODS
  Typical sampling method is used to select a farmland irrigation river of the suburb of a city. Use the atomic absorption spectrophotometry, and measure the heavy metal cadmium (Cd), copper (Cu), lead (Pb) in the river water samples and mud samples by graphite furnace method and flame method, respectively. The results of water were compared with GB 3838-2002, Environmental Quality Standards for Surface Water, and GB 5084-2005, Standards for Irrigation Water Quality. The results of mud were compared with national soil background value. The contents of Cu and Cd in the river samples do not exceed the standard, and that of Pb is 3 to 6 times higher than the standard. According to the single factor pollution index method, the single factor pollution indice of Cu, and Cd in the river are less than 0.2 and are of clean level, while that of Pb reaches 6.84, indicating the Pb pollution in river water is severe. Cu in mud is more than 4 times of the soil background value, and that of Cd is more than 69 times of the soil background value, and that of Pb is more than 2 times of the soil background value. The single item pollution index indicates, in mud, the pollution index of Pb is 2.5, medium level pollution. The pollution indice of Cu and Cd in mud are more than 3, is severe pollution, and the Cd pollution is especially heavy, and the single pollution index reaches 67.76. The comprehensive pollution indice of the river and the mud are 5.346 and 84.115, respectively, indicating that both are at heavy pollution level. The main pollution source of the river originates from Pb, and that of the mud is from Cd and it is required to take measure and control as early as possible.
authors.affiliation: Xinxiang Medical College, Xinxiang 453003, China.
authors.forename: Jingzhuan
authors.initials: J
authors.lastname: Xi
authors.forename: Cuimei
authors.initials: C
authors.lastname: Li
authors.forename: Shouying
authors.initials: S
authors.lastname: Wang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Jiang
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Zhang
authors.forename: Guangliang
authors.initials: G
authors.lastname: Han
mesh_terms: D002104:Cadmium / Q000032:analysis; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D045483:Rivers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead