Article

Assessment and mapping of environmental quality in agricultural soils of Zhejiang Province, China.

Institute ofAgricultural Remote Sensing and Information System, Zhejiang University, Hangzhou 310029, China.
Journal of Environmental Sciences (Impact Factor: 1.77). 02/2007; 19(1):50-4. DOI: 10.1016/S1001-0742(07)60008-4
Source: PubMed

ABSTRACT Heavy metal concentrations in agricultural soils of Zhejiang Province were monitored to indicate the status of heavy metal contamination and assess environmental quality of agricultural soils. A total of 908 soil samples were collected from 38 counties in Zhejiang Province and eight heavy metal (Cd, Cr, Pb, Hg, Cu, Zn, Ni and As) concentrations had been evaluated in agricultural soil. It was found 775 samples were unpolluted and 133 samples were slightly polluted and more respectively, that is approximately 14.65% agricultural soil samples had the heavy metal concentration above the threshold level in this province by means of Nemerow's synthetical pollution index method according to the second grade of Standards for Soil Environmental Quality of China (GB15618-1995). Contamination of Cd was the highest, followed by Ni, As and Zn were lower correspondingly. Moreover, Inverse Distance Weighted (IDW) interpolation method was used to make an assessment map of soil environmental quality based on the Nemerow's pollution index and the soil environmental quality was categorized into five grades. Moreover, ten indices were calculated as input parameters for principal component analysis (PCA) and the principal components (PCs) were created to compare environmental quality of different soils and regions. The results revealed that environmental quality of tea soils was better than that of paddy soils, vegetable soils and fruit soils. This study indicated that GIS combined with multivariate statistical approaches proved to be effective and powerful tool in the mapping of soil contamination distribution and the assessment of soil environmental quality on provincial scale, which is beneficial to environmental protection and management decision-making by local government.

0 Bookmarks
 · 
116 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: Heavy metals in the surface soils from lands of six different use types in one of the world's most densely populated regions, which is also a major global manufacturing base, were analyzed to assess the impact of urbanization and industrialization on soil pollution. A total of 227 surface soil samples were collected and analyzed for major heavy metals (As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn) by using microwave-assisted acid digestion and inductively coupled plasma-mass spectrometry (ICP-MS). Multivariate analysis combined with enrichment factors showed that surface soils from the region (>7.2 × 10(4) km(2)) had mean Cd, Cu, Zn, and As concentrations that were over two times higher than the background values, with Cd, Cu, and Zn clearly contributed by anthropogenic sources. Soil pollution by Pb was more widespread than the other heavy metals, which was contributed mostly by anthropogenic sources. The results also indicate that Mn, Co, Fe, Cr, and Ni in the surface soils were primarily derived from lithogenic sources, while Hg and As contents in the surface soils were controlled by both natural and anthropogenic sources. The pollution level and potential ecological risk of the surface soils both decreased in the order of: urban areas > waste disposal/treatment sites ∼ industrial areas > agricultural lands ∼ forest lands > water source protection areas. These results indicate the significant need for the development of pollution prevention and reduction strategies to reduce heavy metal pollution for regions undergoing fast industrialization and urbanization.
    Environmental Science and Pollution Research 04/2013; · 2.62 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Cement production is noted for particulate pollution of the environment because of high dust emissions and heavy metals which later deposited in soils serving as sink. This study aimed to assess the concentrations and potential ecological risk of heavy metals around a mega cement factory in southwest Nigeria. Soil samples were randomly collected in the eastern, western and southern axes of the factory. The samples were subjected to Nitric-perchloric acid digestion and Atomic Absorption Spectrophotometer was used to determine the concentrations of Pb, Cu, Cd, Cr and Zn. Data were analyzed with ANOVA and Duncan Multiple Range Test. The results showed that the mean concentrations of Pb, Cu, Cd and Cr (666.1 mg/kg, 613.4 mg/kg, 547.9 mg/kg and 188.5 mg/kg respectively) were above the international standard limits. Nemerow pollution indices according to the axes indicated seriously pollution with heavy metals. Single Potential Ecological Risk Index (PERI) showed that soil contamination from Cd in the 3 axes had very high potential ecological risk which translated into the high value of Comprehensive Potential Ecological Risk (RI) value (11,488.3) for the entire study area. The urgent need for the bioremediation of the soil around the cement factory especially for Cd, to avert potential environmental disaster can be concluded
    Polish Journal of Environmental Studies 01/2013; 22(2). · 0.46 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Soil samples were collected on farmland in a lead-zinc mining area in the Karst region of Guangxi, China. The contamination of the soil by eight metals (Cd, Hg, As, Cu, Pb, Cr, Zn, Ni) was determined. Among all these metals, Cd is the most serious pollutant in this area. Zn, Hg as well asPb can also be measured at high levels, which may affect the crop production. All other metals contributed marginally to the overall soil contamination. Besides the evaluation of single metals, the Nemerow synthetic index indicated that the soil is not suitable for agricultural use.
    Bulletin of Environmental Contamination and Toxicology 04/2013; · 1.11 Impact Factor

Full-text

View
1 Download
Available from