The chemical, toxicological and ecological studies in assessing the heavy metal pollution in Le An River, China

He, Mengchang; Wang, Zijian; Tang, Hongxiao

doi:10.1016/s0043-1354(97)00229-7

Cited by 90 publications

(45 citation statements)

References 10 publications

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“…where Ci is the concentration of heavy metal in soil (mg kg −1 soil); Ti is the Btoxic-response^factor for a given heavy metal, i.e., Pb=5, Cd=30 (He et al 1998); Ei is the potential ecological toxicity coefficient for a given heavy metal; and Ri is total ecological toxicity coefficient under multiple heavy metal pollution. Using this method, we compared the soil enzyme activities under different pollution treatments after transforming Cd and Pb concentration to the total ecological toxicity coefficient.…”

Section: Modified Ecological Model For Soil Enzyme Activitymentioning

confidence: 99%

Determining soil enzyme activities for the assessment of fungi and citric acid-assisted phytoextraction under cadmium and lead contamination

Mao

Tang

Feng

et al. 2015

Environ Sci Pollut Res

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Microorganism or chelate-assisted phytoextraction is an effective remediation tool for heavy metal polluted soil, but investigations into its impact on soil microbial activity are rarely reported. Consequently, cadmium (Cd)-and lead (Pb)-resistant fungi and citric acid (CA) were introduced to enhance phytoextraction by Solanum nigrum L. under varied Cd and Pb pollution levels in a greenhouse pot experiment. We then determined accumulation of Cd and Pb in S. nigrum and the soil enzyme activities of dehydrogenase, phosphatase, urease, catalase, sucrase, and amylase. Detrended canonical correspondence analysis (DCCA) was applied to assess the interactions between remediation strategies and soil enzyme activities. Results indicated that the addition of fungi, CA, or their combination enhanced the root biomass of S. nigrum, especially at the high-pollution level. The combined treatment of CA and fungi enhanced accumulation of Cd about 22-47 % and of Pb about 13-105 % in S. nigrum compared with the phytoextraction alone. However, S. nigrum was not shown to be a hyperaccumulator for Pb. Most enzyme activities were enhanced after remediation. The DCCA ordination graph showed increasing enzyme activity improvement by remediation in the order of phosphatase, amylase, catalase, dehydrogenase, and urease. Responses of soil enzyme activities were similar for both the addition of fungi and that of CA. In summary, results suggest that fungi and CA-assisted phytoextraction is a promising approach to restoring heavy metal polluted soil.

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Section: Modified Ecological Model For Soil Enzyme Activitymentioning

confidence: 99%

Determining soil enzyme activities for the assessment of fungi and citric acid-assisted phytoextraction under cadmium and lead contamination

Mao

Tang

Feng

et al. 2015

Environ Sci Pollut Res

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“…In addition, correlations between the individual fish metal concentrations and the nine parameters were examined per sampling site for each lake/river and turned out to be statistically insignificant (P [ 0.05). (He et al 1998;Papagiannis et al 2004). Overall, the average lake metal concentrations were below the maximum permissible levels (MPLs) set by the Chinese guideline for food contaminants (GB2762-2012).…”

Section: Resultsmentioning

confidence: 99%

Bioaccumulation and regional distribution of trace metals in fish of the Tibetan Plateau

Yang

Zhang

Wang

2013

Environ Geochem Health

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There are limited data on trace metals in the fishes of the Tibetan Plateau. In this study, 62 fish samples were collected from six alpine lakes and a river to investigate the levels and spatial variations of trace metals across the Tibetan Plateau. The concentrations of nine trace elements in fish samples were measured using an inductively coupled plasma mass spectrometer after microwave digestion. Results showed the metal concentrations in the fish muscles had the following ranges: Cr 0.09-0.74 mg/kg, Mn 0.38-4.49 mg/kg, Ni 0.06-0.91 mg/kg, Cu 1.00-32.2 mg/kg, Zn 13.1-102.5 mg/kg, As 0.12-3.10 mg/kg, Pb 0.46-3.22 mg/kg, Ba 0.60-4.93 mg/kg, and Se 0.77-9.38 mg/kg on a dry weight basis, respectively. All the lake-averaged metal concentrations in the fish muscle were below the maximum permissible levels set by the Chinese food health criterion (GB2762-2012). The results were analyzed by multivariate statistical techniques to identify the major factors explaining the variance of metal concentrations in the alpine lakes. This work provides baseline data on metal pollution in common fish species of the Tibetan Plateau, contributing to the effective evaluation of both the environmental quality and health status of organisms in the aquatic ecosystem.

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“…Their high concentration in nature affects the biodiversity and poses a serious threat to human health. 1,2 Anthropogenic activity is the general cause underlying the constantly increasing levels of different toxicants including heavy metals. The rapid development of the industry is an important factor attributed to the elevated concentrations of heavy metals in the environment.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Cadmium, Nickel and Lead Toxicity by Using Green Algae Scenedesmus Incrassatulus and Human Cell Lines: Potential In Vitro Test-Systems for Monitoring of Heavy Metal Pollution

Batsalova¹,

Teneva²,

Belkinova³

et al. 2017

Toxicol Forensic Med Open J

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Citation Research ABSTRACTBackground: Pollution of aquatic ecosystems with heavy metals leads to decrease of the biodiversity and accumulation of toxicants in the food chain. Species of the genus Scenedesmus are sensitive indicators of environmental changes and have been used for the evaluation of risk factors for contamination of aquatic ecosystems. The microalga Scenedesmus incrassatulus can remove chromium and cadmium from the growth medium. Also, mammalian cell lines are another type of test system that has been used to study the mechanisms of heavy metal toxicity. However, little is known about the sensitivity and potential application of different human cell lines for bio-monitoring of heavy metal contamination. Aim: To investigate the toxicity of increasing concentrations of cadmium, nickel and lead on the green microalga Scenedesmus incrassatulus and the human cell lines HeLa, A549, FL, and Caco-2. Materials and Methods: To evaluate the toxic effects of Cd, Ni, and Pb, two test systems were used: an algal culture of S. incrassatulus and four human cell lines. For the algal system, the growth of the algae and the features such as "cell number in the coenobium/single cells", "position of the inner cells in the coenobium", and "shape of the peripheral cell", were assessed. For the human cell cultures, the methyl-thiazol-tetrazolium (MTT) and neutral red assays were performed. In both the systems, the effects were measured at different time points (24, 48, and 72 hours) of treatment. Results: The experimental observations showed that lead exposure in maximal permissible levels (MPL) inhibited the growth of the green algae S. incrassatulus, while cadmium had a stimulating effect even at lower test concentrations. Cadmium and nickel treatment affected the morphological features "cell number in the coenobium/single cells" and "position of the inner cells in the coenobium". Regarding "shape of the peripheral cell", lead had the most significant effect after 24 h of treatment, which was expressed in reduction of the type "incrassatulus" compared to the type "obliquus". Cytotoxic effects of the heavy metals were also observed for all tested human cell lines. HeLa, FL and Caco-2 were most sensitive to cadmium compared to lead, while A549 cells showed equal sensitivity to all three heavy metals. Conclusion: The reported data presented specific impacts on the studied parameters for both the test-systems. The present study concluded that the green alga S. incrassatulus could be used as an effective test system for the biomonitoring of lead pollution. The cell line A549 can serve as a sensitive test system for the presence of cadmium, nickel and lead.

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The chemical, toxicological and ecological studies in assessing the heavy metal pollution in Le An River, China

Cited by 90 publications

References 10 publications

Determining soil enzyme activities for the assessment of fungi and citric acid-assisted phytoextraction under cadmium and lead contamination

Determining soil enzyme activities for the assessment of fungi and citric acid-assisted phytoextraction under cadmium and lead contamination

Bioaccumulation and regional distribution of trace metals in fish of the Tibetan Plateau

Assessment of Cadmium, Nickel and Lead Toxicity by Using Green Algae Scenedesmus Incrassatulus and Human Cell Lines: Potential In Vitro Test-Systems for Monitoring of Heavy Metal Pollution

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