Spatial distribution of heavy metals in soils: a case study of Changxing, China

Shi, Jiachun; Wang, Haizhen; Xu, Jianming; Wu, Jianjun; Liu, Xingmei; Zhu, Haiping; Cai, Yu

doi:10.1007/s00254-006-0443-6

Cited by 113 publications

(51 citation statements)

References 21 publications

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“…Kriging has been widely used as an important interpolation method at different scales, especially in studies on soil pollution (Chen et al 2008;Shi et al 2007). The semi-variogram, γ (h), measures the mean variability between two points, X and X + h, as a function of their distance, h, for data location at discrete sampling locations.…”

Section: Geostatisticsmentioning

confidence: 99%

“…These effects can be considered a real threat to human food safety (Okoronkwo et al 2005). In recent years, rapid industrialization and urbanization have caused heavy metal contamination to become a serious concern in many countries (Chen et al 2008;Liu et al 2006;Rodrigues et al 2006;Shi et al 2007). One of the major direct environmental impacts of development is the degradation of water resources and water quality (USEPA 2001).…”

Section: Introductionmentioning

confidence: 99%

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Heavy metals assessment and identification of their sources in agricultural soils of Southern Tehran, Iran

Hani

Pazira

2010

Environ Monit Assess

103

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A detailed investigation was conducted to evaluate heavy metal sources and their spatial distribution in agricultural fields in the south of Tehran using statistics, geostatistics, and a geographic information system. The content of Cd, Cu, Co, Pb, Zn, Cr, and Ni were determined in 106 samples. The results showed that the primary inputs of Cr, Co, and Ni were due to pedogenic factors, while the inputs of Zn, Pb, and Cu were due to anthropogenic sources. Cd was associated with distinct sources, such as agricultural and industrial pollution. Ordinary kriging was carried out to map the spatial patterns of heavy metals, and disjunctive kriging was used to quantify the probability of heavy metal concentrations higher than their recommended threshold values. The results show that Cd, Cu, Ni, and Zn exhibit pollution risk in the study area. The sources of the high pollution levels evaluated were related to the use of urban and industrial wastewater and agricultural practices. These results are useful for the development of proper management strategies for remediation practices in the polluted area.

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Section: Geostatisticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heavy metals assessment and identification of their sources in agricultural soils of Southern Tehran, Iran

Hani

Pazira

2010

Environ Monit Assess

103

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“…Potentially toxic metal pollution in the environment has given rise to growing concerns from scientists, and a considerable amount of researches have been done all over the world (Shi et al, 2007;Amara et al, 2008;Suruchi & Pankaj, 2011). The impact of toxic metals contamination on animals result in serious economic losses, thus, there is an increasing concern about environmental pollutants emanating into the livestock production systems (Patra, Rautray, & Swarup, 2011).…”

Section: Introductionmentioning

confidence: 99%

<b>Semen traits, testicular morphometry and histopathology of cadmium-exposed rabbit bucks administered methanolic extract of <i>Phoenix dactylifera</i> fruit

Ansa¹,

Akpere²,

Imasuen³

2017

Acta Sci. Anim. Sci.

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ABSTRACT. This study evaluated the effect of Cd on some male reproductive parameters; and explored the therapeutic potentials of methanolic extract of Phoenix dactylifera (MEPD) fruit in averting such reproductive damages. 45 rabbit bucks aged 24-28 weeks and weighing 1.41-1.43 kg was used. The rabbits were assigned to 5 treatment groups (control, Cd-only, Cd + 300 mg MEPD, Cd + 600 mg MEPD and Cd + 900 mg MEPD) in a completely randomized design. The rabbits were dosed with 3 mg CdCl 2 kg -1 feed for 7 days followed by MEPD for 56 days after every 72 hours. Result of semen evaluation indicates that semen volume, motility, libido, concentration, total ejaculate, viability and morphology were significantly reduced by Cd compared to the normal control group. Testis density and epididymis length of the control rabbits were significantly different from the Cd-only exposed rabbits. Histopathological examination revealed severe testicular damage due to Cd. Indeed, treatment with MEPD significantly reversed the deleterious reproductive effects caused by Cd. In conclusion, cadmium drastically affected the testis of rabbits and treatment with MEPD alleviated some deleterious effects.Keywords: testis, sperm, heavy metal, methanol, plant extract.Características do sêmen, morfometria testicular e histopatologia de cadáveres de coelho expostos, administrado extrato metanólico de frutos de Phoenix dactylifera RESUMO. Este estudo avaliou o efeito da Cd em alguns parâmetros reprodutivos masculinos e explorou os potenciais terapêuticos de extrato metanólico de Phoenix dactylifera (MEPD), fruto na prevenção de tais danos reprodutivos. Foram utilizados 45 machos de coelho com idade entre 24-28 semanas e pesando 1,41-1,43 kg. Os coelhos foram designados a cinco grupos de tratamento (controle, Cd-apenas, Cd+300 mg MEPD, Cd+600 mg MEPD e Cd+900 mg MEPD) num delineamento inteiramente casualizado. Os coelhos foram doseados com 3 mg de CdCl2 kg -1 de alimento durante sete dias seguido por MEPD durante 56 dias após cada 72h. O resultado da avaliação do sêmen indica que o volume de sêmen, a motilidade, a libido, a concentração, a ejaculação total, a viabilidade e a morfologia foram significativamente reduzidos pelo Cd em comparação com o grupo controle normal. A densidade do testículo e o comprimento do epidídimo dos coelhos de controle foram significativamente diferentes dos coelhos expostos. O exame histopatológico revelou dano testicular grave devido ao Cd. Na verdade, o tratamento com MEPD reverteu significativamente os efeitos deletérios reprodutivos causados por Cd. Em conclusão, o cádmio afetou muito os testículos de coelhos e o tratamento com MEPD aliviou alguns efeitos deletérios.Palavras-chave: testículo, esperma, metal pesado, metanol, extrato vegetal.

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“…Lin tial pixel grid, until the pixel values honor the proposed histogram and semivariogram model [12]. Geostatistical conditional simulations have been recently applied) to simulate the spatial variability and distribution of heavy metal pollution in soil to identify polluted areas, support risk assessments and support uncertainty analysis [13][14][15][16][17][18][19][20]. Theories concerning such geostatistical simulation techniques can be found in various books and articles [11,8,21].…”

Section: Introductionmentioning

confidence: 99%

Simulating Spatial Distributions, Variability and Uncertainty of Soil Arsenic by Geostatistical Simulations in Geographic Information Systems

Lin¹

2008

TOENVIRSJ

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This study quantifies and delineates the spatial distributions, variability and uncertainties of soil arsenic (As) in the northern part of Changhua County in central Taiwan by using kriging, sequential Gaussian simulation (SGS) and simulated annealing simulation (SAS) in geographic information systems. Thousand realizations of soil As are simulated by using SGS and SAS. The impacts of the number of generated realizations on the standard deviation of the soil arsenic distributions simulated by SGS and SAS were performed for assessing and mapping spatial variability and distributions of soil arsenic. The semivariogram results show that As data exhibited small scale variation in the study area. Kriging captures spatial distribution of soil As, but underestimate high As concentration area. However, both SGS and SAS well capture spatial distributions and variability of soil arsenic in the study area, but SGS results in higher average standard deviation than SAS with the same number of realizations. 40 realizations of SAS are reliable to simulate and map the distributions, variability and uncertainty of soil arsenic, but 100 realizations are needed by using SGS. Both estimates and simulates demonstrated that the high As concentration area distributed around the irrigation ditch systems and industrial plants in the study site. Finally, the cumulative distribution of soil As of 100 SGS realizations is obtained and can be used for further risk assessment.

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Spatial distribution of heavy metals in soils: a case study of Changxing, China

Cited by 113 publications

References 21 publications

Heavy metals assessment and identification of their sources in agricultural soils of Southern Tehran, Iran

Heavy metals assessment and identification of their sources in agricultural soils of Southern Tehran, Iran

<b>Semen traits, testicular morphometry and histopathology of cadmium-exposed rabbit bucks administered methanolic extract of <i>Phoenix dactylifera</i> fruit

Simulating Spatial Distributions, Variability and Uncertainty of Soil Arsenic by Geostatistical Simulations in Geographic Information Systems

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