Spatial distribution and vertical variation of arsenic in Guangdong soil profiles, China

Hh, Zhang; Hx, Yuan; Yg, Hu; Zf, Wu; La, Zhu; Zhu, Ling; Li, FB; Dq, Li

doi:10.1016/j.envpol.2006.01.029

Cited by 40 publications

(22 citation statements)

References 21 publications

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“…The lithogenic origin of Cr and Ni in the soil is very well known and has been clearly demonstrated in the PRD region (Zhang et al, 2008) and other countries (Iran, Esmaeili et al, 2014;Italy, Facchinelli et al, 2001;Greece, Kelepertzis, 2014;Spain, Rodriguez Martin et al, 2013). In accordance with Zhang et al (2006), the elevated concentration of soil As in the PRD region was of lithogenic Table 3 Pearson and Spearman (in bold italic) correlation coefficients between geo-accumulation indices of trace metals and landscape variables at different scales. origin.…”

Section: The Contamination and Sources Of Trace Metals In The Prd Regionsupporting

confidence: 58%

Effects of landscape heterogeneity on the elevated trace metal concentrations in agricultural soils at multiple scales in the Pearl River Delta, South China

et al. 2015

Environmental Pollution

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Section: The Contamination and Sources Of Trace Metals In The Prd Regionsupporting

confidence: 58%

Effects of landscape heterogeneity on the elevated trace metal concentrations in agricultural soils at multiple scales in the Pearl River Delta, South China

et al. 2015

Environmental Pollution

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“…The episodic metal concentration peaks appear to be related to specific environmental events or pollution-related cause. In a similar approach, a number of (Zhang et al 2006;Tang et al 2008). Some of these works have shown that sediment profiles can be as reliable as chronological records of metal contaminants (Monterroso et al 2003).…”

Section: Introductionmentioning

confidence: 92%

The study of metal contamination in urban topsoils of Mexico City using GIS

et al. 2010

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This research presents and discusses information concerning the spatial distribution of heavy metals (Pb, Cu, Zn, Ba, Co, Cr, Ni and V) in the urban environments of Mexico City using geographical information system and statistical analysis. Superficial soil samples (n = 146) were analyzed. The highest contamination indices were found in the north and center zone of the metropolitan area. In contrast, the surrounding rural fields show a lower impact grade. The higher concentrations of Pb, Cu, Zn and Ba were observed as being related to high vehicular traffic, nevertheless other elements such as Co, Cr, Ni and V do not show anthropogenic influence and their content can be attributed to the parental rock. The results are compared with previous surveys carried out in 2003 in order to evaluate temporal deposition trends. No changes were found on reported concentrations except for Cu and Zn, whose concentration has increased in later years. The results suggest that spatial distribution analysis and results in comparison with previous studies could be useful for the management and sustainable development of the metropolitan area of Mexico City.

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“…Accumulation of Ni and Zn (as well as Cu and Pb) in the surface fraction of sludge-amended soils in Zimbabwe was attributed to possible interaction with OM (Nyamangara and Mzezewa, 1999). Zhang et al (2006) reported that OM was not a major factor in determining the distribution of As in 260 soil profiles in the sub-tropical, monsoon climate of southern China.…”

Section: Organic Mattermentioning

confidence: 99%

“…For these reasons, it is worth considering trace metals and metalloids individually in this section in the hope of gaining a clearer understanding of trace metal transport in tropical soil profiles. Zhang et al (2006) reported arsenic concentrations in 260 soil profiles in the sub-tropical, monsoon climate of southern China. Geometric means for the A, B and C horizons were 10.4, 10.7 and 11.3 mg g À1 , respectively.…”

Section: Mobility and Depth Distributionmentioning

confidence: 99%

The mobility and bioavailability of trace metals in tropical soils: a review

Rieuwerts

2007

Chemical Speciation & Bioavailability

134

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In recent years, initiatives on critical loads of metals have resulted in the development of models to predict critical, i.e. mobile or bioavailable, concentrations of potentially toxic elements in soils. These models have been based on data from temperate soils and, considering the fundamentally different soil chemistry of the major tropical soil types, it is unlikely that such models could be applied successfully in the tropics. In particular, the major tropical soil types, particularly oxisols and ultisols, are distinguished from most temperate soils by low activity clays, low organic matter contents, low pH values and high levels of Fe oxides. The aim of this review paper is to collate existing information on the behaviour of trace metals in tropical soils, particularly in relation to metal mobility and bioavailability, and note differences, where these exist, with temperate soils. The main findings are as follows. The acidic nature of many tropical soils may not, of itself, lead to greater metal solubility. The relatively low organic matter content of tropical soils suggests that it cannot be relied upon to retain metals. However, when it is present, it appears to be important in the retention of copper, lead and zinc. The clay fractions of many tropical soils are dominated by kaolinite which is less able than 2 : 1 layer silicate clays to adsorb metals. However, oxisols and ultisols in particular have relatively high Fe oxides contents and these may be effective in metal sorption. Overall though, soils such as oxisols and ultisols appear to sorb relatively low amounts of added metals, most likely explained by the low activity clay minerals they contain and the rapid decomposition of organic matter incorporated into them. Dominant retention mechanisms, where they occur, are inner and outer sphere adsorption but not precipitation. Cadmium, Cu, Zn and Ni appear to be mobile in tropical soils. Chromium may be mobile in the A horizon but retained in the B horizon. The evidence for Pb points to surface retention, as is often observed for this metal in temperate soils. Metals in contaminated tropical soils appear to be rather bioavailable, judging by the few studies on plant uptake. It should be noted that the above statements are based on a relatively small number of studies. Further work is required if we are to gain an improved understanding of the mobility and bioavailability of trace metals in tropical soils.

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Spatial distribution and vertical variation of arsenic in Guangdong soil profiles, China

Cited by 40 publications

References 21 publications

Effects of landscape heterogeneity on the elevated trace metal concentrations in agricultural soils at multiple scales in the Pearl River Delta, South China

Effects of landscape heterogeneity on the elevated trace metal concentrations in agricultural soils at multiple scales in the Pearl River Delta, South China

The study of metal contamination in urban topsoils of Mexico City using GIS

The mobility and bioavailability of trace metals in tropical soils: a review

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