Pollution Assessment of Heavy Metals in Soils
and Plants around a Molybdenum Mine
in Central China

Han, Zhangxiong; Wan, Dejun; Tian, Hua; He, Wenxiang; Wang, Ziquan; Liu, Qiang

doi:10.15244/pjoes/83693

Cited by 38 publications

(25 citation statements)

References 25 publications

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“…It is inevitable the long-term mining activity also caused the increase of Cu, Mn, and Zn in soil. Similar results have also been reported in the research of Han et al (2019), who found Mo mining could not only increase the Mo concentration, but also increase the concentrations of the associated heavy metals such as Cu, Pb, and Zn in Shaanxi Mo mine area. Mo concentration in the unexploited area was 108.13 mg kg −1 , 54.1 times higher than the background values ( Table 2).…”

Section: Discussionsupporting

confidence: 90%

“…This result showed that long-term mining activity had led to the enrichment of Mo in soil, which agrees with the previous findings. Han et al (2019) confirmed that the Mo concentration reached 14.4 times the soil background value in Shaanxi Province because of the mining activity. Boojar & Tavakkoli (2011) demonstrated that Mo mining has resulted in a massive increase Mo concentration of soil and the mean concentration of Mo in the mining soil reached 448 mg kg −1 .…”

Section: Discussionmentioning

confidence: 55%

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Effects of mining on the molybdenum absorption and translocation of plants in the Luanchuan molybdenum mine

Yin

Shi

Zhang

et al. 2020

PeerJ

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Background There is a critical need to examine whether mining of molybdenum (Mo) ore will affect Mo absorption and translocation by plants at a community level. Methods Indigenous plants and their rhizospheric soil (0–20 cm) growing in two different areas including the mining and the unexploited areas were collected from the Luanchuan Mo mine—one of the largest Mo mines in Asia. The concentrations of Mo and other heavy metals of plants or soil were measured by ICP-AES. Mo absorption and translocation in plants growing in two areas were investigated and compared. Heavy metal pollution in soil was also evaluated by the potential ecological hazard index method. Results Mo concentration in mining soils was higher with the changes from 108.13 to 268.13 mg kg−1 compared to unexploited area. Mo concentrations in shoots and roots of plants growing in the mining area were also significant higher than those growing in the unexploited area with 2.59 and 2.99 times, respectively. The Mo translocation factor of plants growing in the unexploited area was 1.61, which reached 1.69 times that of plants growing in the mining area. Mo was the main heavy metal pollutant in the soil of both the mining and the unexploited areas. Conclusion Mining of Mo had changed not only the Mo concentration in soil but also Mo absorption and translocation in plants. Plants growing in the mining area absorbed more Mo from the soil but translocated relatively less to shoots than plants of the unexploited area. However, the mechanisms of Mo absorption and translocation of plants in mining area should be further studied in the future.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 55%

Effects of mining on the molybdenum absorption and translocation of plants in the Luanchuan molybdenum mine

Yin

Shi

Zhang

et al. 2020

PeerJ

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show abstract

“…Mo uptake by plants depends mainly on Mo forms and concentrations in soils, which can be increased by human activities such as mining [8] and sludge applications [9]. In Mo-mining affected soils, Mo concentrations can reach up to 1071.52 mg/kg [10] and 2903.91 mg/kg [11], respectively.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi Improve the Performance of Sweet Sorghum Grown in a Mo-Contaminated Soil

Shi

Zhang

et al. 2020

JoF

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Arbuscular mycorrhizal fungi are among the most ubiquitous soil plant-symbiotic fungi in terrestrial environments and can alleviate the toxic effects of various contaminants on plants. As an essential micronutrient for higher plants, molybdenum (Mo) can cause toxic effects at excess levels. However, arbuscular mycorrhizal fungal impacts on plant performance and Mo accumulation under Mo-contamination still require to be explored. We first studied the effects of Claroideoglomus etunicatum BEG168 on plant biomass production and Mo accumulation in a biofuel crop, sweet sorghum, grown in an agricultural soil spiked with different concentrations of MoS2. The results showed that the addition of Mo produced no adverse effects on plant biomass, N and P uptake, and root colonization rate, indicating Mo has no phytotoxicity and fungitoxicity at the test concentrations. The addition of Mo did not increase and even decreased S concentrations in plant tissues. Arbuscular mycorrhizal inoculation significantly enhanced plant biomass production and Mo concentrations in both shoots and roots, resulting in increased Mo uptake by mycorrhizal plants. Overall, arbuscular mycorrhizal inoculation promoted the absorption of P, N and S by sweet sorghum plants, improved photosystem (PS) II photochemical efficiency and comprehensive photosynthesis performance. In conclusion, MoS2 increased Mo accumulation in plant tissues but produced no toxicity, while arbuscular mycorrhizal inoculation could improve plant performance via enhancing nutrient uptake and photochemical efficiency. Sweet sorghum, together with arbuscular mycorrhizal fungi, shows a promising potential for phytoremediation of Mo-contaminated farmland and revegetation of Mo-mine disturbed areas, as well as biomass production on such sites.

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“…Furthermore, there has been a progressive global increase in the amount of heavy metals in the environment (Chen et al 2015;Murtaza et al 2017;Han et al 2019). Such pollution from numerous heavy metals has become severe in many regions of China because of the rapid development of China's economy and rapid growth in the population in recent decades (Huang et al 2007;Wang et al 2011;Chen et al 2015;Han et al, 2019). In addition, a variety of heavy metals can be deposited into the same habitat (Wang et al 2011(Wang et al , 2019d(Wang et al , 2020cChen et al 2015;Han et al 2019;Jiang et al 2019) and can accumulate to high concentrations in some habitats (Motesharezadeh et al 2017;Murtaza et al 2017;Han et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Heavy metal pollution improves allelopathic effects of Canada goldenrod on lettuce germination

Wei

Shu

et al. 2020

Plant Biol J

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• Large amounts of heavy metals have been released into the environment. Thus, the allelopathic effects of invasive alien species on the germination performance of cooccurring indigenous species may be altered or even heightened with the rapid growth in heavy metal pollution. • This study evaluated the impacts of Canada goldenrod (Solidago canadensis L.) leaf extracts at concentrations of 0, 10 or 20 gl 1 on the germination of lettuce under different forms of heavy metal pollution (Cu 2+ , Pb 2+ or a combination of Cu 2+ and Pb 2+ ; 35 mgl 1) during incubation in Petri dishes for 10 days. • Goldenrod leaf extracts (high concentration) reduced growth of aboveground and belowground parts of lettuce as well as competition for light and soil nutrients. However, low concentrations of goldenrod leaf extracts dramatically improved growth of lettuce roots, competition for light, soil nutrient availability, leaf photosynthetic area and growth competitiveness. The combination of goldenrod leaf extracts and heavy metal pollution was synergistic on most lettuce germination parameters, probably because high concentrations of goldenrod leaf extracts together with heavy metal pollution had a synergistic negative impact on lettuce germination. • Consequently, increased levels of heavy metal pollution may favour invasion of invasive alien species while largely suppressing germination of indigenous species.

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Pollution Assessment of Heavy Metals in Soils and Plants around a Molybdenum Mine in Central China

Cited by 38 publications

References 25 publications

Effects of mining on the molybdenum absorption and translocation of plants in the Luanchuan molybdenum mine

Effects of mining on the molybdenum absorption and translocation of plants in the Luanchuan molybdenum mine

Arbuscular Mycorrhizal Fungi Improve the Performance of Sweet Sorghum Grown in a Mo-Contaminated Soil

Heavy metal pollution improves allelopathic effects of Canada goldenrod on lettuce germination

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