A comparative study of metal contamination in soil using the borehole method

Teh, Tianlik; Rahman, Nik Norulaini Nik Ab; Shahadat, Mohammad; Wong, Y S; Syakir, Muhammad; Omar, A.K. Mohd

doi:10.1007/s10661-016-5394-0

Cited by 12 publications

(4 citation statements)

References 63 publications

(55 reference statements)

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“…However, caution is needed when extrapolating since metal effects in soils are influenced by pH, clay and organic matter content (Rieuwerts et al, 1998). Heavy-metal levels of the present study were lower than the allowable concentrations imposed by regulatory bodies from developed countries (Teh et al, 2016), except Hg when compared to UNEP limits. While the world average Hg levels in soil ranges from 0.01 mg kg -1 to 0.2 mg kg -1 (Adriano, 2001), UNEP (2013) recommends an acceptable range from 0.07 mg kg -1 to 0.3 mg kg -1 .…”

Section: Basic Soil Properties and Heavy Metalscontrasting

confidence: 58%

Influence of heavy metals on nematode community structure in deteriorated soil by gold mining activities in Sibutad, southern Philippines

Martinez

Torres

Santos

et al. 2018

Ecological Indicators

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Ore mining is among the most environmentally destructive anthropogenic practices, particularly in developing countries. Correct assessment of its impacts on soil ecosystems requires an understanding of the response of soil food webs. Nematodes, often the most abundant invertebrates in soils, occupy various positions in food webs, and their assemblages are commonly used to reflect soil health. In October 2014, we collected soil samples from five sites of a small-scale mining area in Sibutad, southern Philippines, to assess the influence of mining activities on nematode assemblages. Two sites were considered undisturbed as there were no visible signs of mining, while the other three sites were disturbed. Nematodes were extracted live and identified to genus level using morphology-based identification. We analysed genus composition, genus and trophic diversity, and the life-history based maturity index. We measured soil environmental variables (pH, organic matter, granulometry and several heavy metals), and correlated variation in nematode genus composition to variation in these environmental factors. Small-scale mining activities had variable but generally nonsignificant impacts on soil properties, altered vegetation and caused increases in concentrations of Hg and Pb, but not consistently so in all impacted sites. The high patchiness in vegetation and heavy metal content were reflected in a high within-site variability of nematode assemblages. Total nematode abundance was significantly lower in two mainly physically disturbed sites, but not so in the most metal-polluted one, suggesting that abundance is not a good indicator of pollution status. Nematode genus composition significantly differed between disturbed and undisturbed sites. By contrast, only few differences between sites were found for diversity or maturity indices, demonstrating that genus composition was a better indicator of mining-related effects than many common indicator indices and highlighting that detailed assemblage analysis is required for a correct interpretation of moderate pollution effects on soil 2 nematodes. Measured environmental variables together explained 60% of the variation in nematode assemblages in the area; the three 'single best' explanatory variables were the concentrations of Pb, Hg and N, but none of these by itself explained more than 8% of the variation in nematode data, while their combination explained 24%. Some genera of predacious and omnivorous nematodes, which are generally expected to be sensitive to both chemical pollution and physical disturbance (e.g., Ironus and Eudorylaimus), were most abundant in sites with elevated heavy metal concentrations, which can have repercussions for the interpretation of nematode-based indices such as the MI.

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Section: Basic Soil Properties and Heavy Metalscontrasting

confidence: 58%

Influence of heavy metals on nematode community structure in deteriorated soil by gold mining activities in Sibutad, southern Philippines

Martinez

Torres

Santos

et al. 2018

Ecological Indicators

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“…The hypertrophy is: (4) All above three characteristics can be integrated as: (5) where C ijmax and C ijmin are the thresholds of the intervalvalued grade j of the indicator i. α ij represents the -half-interval length. β is a constant.…”

Section: Connection Cloud Modelmentioning

confidence: 99%

“…These methods involve substituting pollutant concentration values into mathematical formulas to obtain an index that is compared to corresponding evaluation standards to determine the level of pollution. The index methods include the single factor index method [4,5], Nemerow comprehensive index method [4,6], pollution index method [7,8], geo-accumulation index method [9,10], enrichment factors method [11] and potential ecological hazard index method [12,13]. Although these evaluation methods are simple and easy to operate, they ignore the complexity and fuzziness of soil heavy metal pollution.…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Heavy-Metals Pollution in Soil Based on a Comprehensive Connection Cloud Model

Wu,

Wang,

Long

2023

Pol. J. Environ. Stud.

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Evaluation of heavy metal pollution in soil mass relies mainly on index methods. Choosing suitable methods to process indexes is key to obtaining accurate and reasonable evaluation results. Connection cloud models have been commonly used to evaluate pollution indexes. However, generating a cloud at each grade for each index is a tedious calculation. To address the randomness and fuzziness of soil heavy metal pollution evaluation indicators, we propose a comprehensive connection cloud model that couples the connection clouds of all indicators at each grade as sub-clouds. We establish the model by combining the weights of each indicator to determine the soil heavy metal pollution grade. The proposed model is effective and feasible for the evaluation of soil heavy metal pollution, as demonstrated through examples and comparisons with other methods. The comprehensive connection cloud model overcomes the traditional cloud models' defect of requiring normal distribution for evaluated indicators and considers the interaction between indicators. Thus, it provides a novel route for uncertainty analysis, considering the fuzzy randomness between multiple interrelated indicators.

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“…The index of geo-accumulation (I geo ) was also used to assess the pollution level of a single element. This method not only considers anthropogenic factors and environmental geochemistry background value, but also considers the influence of natural activities on the background values [26]. The comprehensive pollution of 7 PTEs in soils was evaluated by the potential ecological risk index (PERI) [27].…”

Section: Assessment Index Of Ptesmentioning

confidence: 99%

Spatial Distribution and Pollution Assessment of Potentially Toxic Elements in Urban Forest Soil of Nanjing, China

Zhang¹,

Yu²,

Pang³

et al. 2019

Pol. J. Environ. Stud.

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With rapid development of industrialization and urbanization, potentially toxic elements (PTEs) contamination has become a popular problems in China. Many researchers have studied the effects of PTE contamination in agricultural soils [1-2]. Some elements are necessary or beneficial to plants at certain levels, such as Cu, Zn, and Ni. Fertilization with Zn improves water use efficiency, grain yield, and content of seed Zn in chickpea [3], and the experiments conducted at a total of 23 experimental site-years in China,

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A comparative study of metal contamination in soil using the borehole method

Cited by 12 publications

References 63 publications

Influence of heavy metals on nematode community structure in deteriorated soil by gold mining activities in Sibutad, southern Philippines

Influence of heavy metals on nematode community structure in deteriorated soil by gold mining activities in Sibutad, southern Philippines

The Evaluation of Heavy-Metals Pollution in Soil Based on a Comprehensive Connection Cloud Model

Spatial Distribution and Pollution Assessment of Potentially Toxic Elements in Urban Forest Soil of Nanjing, China

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