Response of microbial communities and interactions to thallium in contaminated sediments near a pyrite mining area

Liu, Juan; Yin, Meiling; Zhang, Weilong; Tsang, Daniel C.W.; Wei, Xudong; Zhou, Yuting; Xiao, Tangfu; Wang, Jin; Dong, Xiaoyan; Sun, Yubing; Chen, Yongheng; Li, Hui; Hou, Liping

doi:10.1016/j.envpol.2019.02.089

Cited by 77 publications

(13 citation statements)

References 87 publications

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“…Considering that part of the NaOH is not reacted, the chemical formula of the product can be obtained by approximating the atomic ratio to Na 2 SiO 3 , and the utilization efficiency of NaOH was 88.65%. The result was in good agreement with 89.11% calculated by the formula (2). Therefore, it can be considered that the particles were active silicate components.…”

Section: Adsorption Propertiessupporting

confidence: 85%

“…With the rapid development of the economy and society in recent years, heavy metal pollution in waters and soils due to mining, smelting and combustion emissions is becoming an increasingly serious problem [1][2][3]. Heavy metal contaminants pose a serious threat to human health and the environment owing to their harmful peculiarities such as nonbiodegradability, persistent toxicity and bioenrichment.…”

Section: Introductionmentioning

confidence: 99%

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A Functionalized Silicate Adsorbent and Exploration of Its Adsorption Mechanism

et al. 2020

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Active silicate materials have good adsorption and passivation effects on heavy metal pollutants. The experimental conditions for the preparation of active silicate heavy metal adsorbent (ASHMA) and the adsorption of Cu(II) by ASHMA were investigated. The optimum preparation conditions of ASHMA were as follows: 200 mesh quartz sand as the raw material, NaOH as an activating agent, NaOH/quartz sand = 0.45 (mass fraction), and calcination at 600 • C for 60 min. Under these conditions, the active silicon content of the adsorbent was 22.38% and the utilization efficiency of NaOH reached 89.11%. The adsorption mechanism of Cu(II) on the ASHMA was analyzed by the Langmuir and Freundlich isotherm models, which provided fits of 0.99 and 0.98, respectively. The separation coefficient (R L ) and adsorption constant (n) showed that the adsorbent favored the adsorption of Cu(II), and the maximum adsorption capacity (Q max ) estimated by the Langmuir isotherm was higher than that of 300 mg/L. Furthermore, adsorption by ASHMA was a relatively rapid process, and adsorption equilibrium could be achieved in 1 min. The adsorbents were characterized by FT-IR and Raman spectroscopy. The results showed that the activating agent destroyed the crystal structure of the quartz sand under calcination, and formed Si-O-Na and Si-OH groups to realize activation. The experimental results revealed that the adsorption process involved the removal of Cu(II) by the formation of Si-O-Cu bonds on the surface of the adsorbent. The above results indicated that the adsorbent prepared from quartz sand had a good removal effect on Cu(II).The amorphous silica structure of active silicate materials makes their reactivity much stronger than that of crystalline silica and confers these materials with excellent adsorption properties for pollutants such as heavy metals [7][8][9]. Studies have shown that the silanol groups (Si-OH) in active silicate materials are the main determinants of surface chemistry [10] and can form covalent bonds and hydrogen bonds with some ions and molecules [11]. Heavy metals such as Cu(II), Cd(II), and Pb(II) in aqueous solution were found to be removed by forming surface adsorption complexes with surface silanol [12,13]. Our team used leaching residue from lead-zinc tailings with high silicon content as a raw material to prepare an active silicate heavy metal adsorbent, which showed a very high adsorption capacity for the heavy metals Cu, Pb, Cd and Zn. The saturated adsorption capacities were 3.40, 2.83, 0.66 and 0.62 mmol/g, respectively [14].Besides, when active silicate materials are applied to the remediation of heavy metals in soil, extractable heavy metals can be transformed into forms with relatively stable valence [15,16], and the heavy metal stress and accumulation in plants can be reduced [17]. Moreover, the active silicates can be absorbed by plants as nutrient elements to form phytoliths, which play an important role in increasing grain yield and enhancing photosynthesis, pest resistance, lodging resistance, and so on...

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Section: Adsorption Propertiessupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

A Functionalized Silicate Adsorbent and Exploration of Its Adsorption Mechanism

et al. 2020

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“…Canonical correspondence analysis (CCA) is used to describe the spatial distribution characteristics of communities, including herbaceous plants, forests, animals, and microbes [18][19][20][21][22][23]. This method combines species variables with complicated environmental ones to facilitate extraction of correlations to the maximum extent objectively possible.…”

Section: Discussionmentioning

confidence: 99%

Ecological Gradient Analysis and Environmental Interpretation of Cyclocarya paliurus Communities

Sun

Zhou

Fang

et al. 2021

Forests

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Cyclocarya paliurus (Batal.) Iljinsk. is mainly distributed in the subtropical areas of China. The leaves of this species are rich in beneficial secondary metabolites exhibiting bioactivity against human diseases, including hyperlipemia, diabetes, and hypertension. To explore the adaptability and distribution characteristics along the environmental gradient of this species, investigation of the characteristics of C. paliurus communities is necessary. In this study, we established 31 sample plots, each 20 m × 20 m, and comparatively analyzed the species composition, species importance value, and tree species diversity of different C. paliurus communities in 2 years. Canonical correspondence analyses were carried out: the first between tree-species importance value and 12 environmental factors, and the second between C. paliurus population-related indices and the 12 environmental factors. On the basis of these analyses, we identified tree species varying markedly in abundance in the studied C. paliurus communities. Several tree species showed adaptive characteristics similar to those of C. paliurus. We also observed that the C. paliurus importance value varied along elevational, longitudinal, and temperature gradients. Our findings should be valuable for prediction of C. paliurus adaptive areas and mixed forest afforestation in different distribution areas.

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“…Studies conducted in the Yunfu AMD site (Yuncheng District, Guandong Province, south China) revealed that Tl polluted surface sediments with Tl concentrations in the range of 1.8 to 16.1 mg/kg were habitats for 50 phyla from the Bacteria domain and 1 phylum of the Archaea domain. They included the genera Acidithiobacillus, Ferroplasma, Ferrovum, Leptospirillum, Metallibacterium and Sulfuriferula (Liu et al 2019b), typically encountered in pyrite oxidation environments. The authors also evidenced the positive correlation between Tl concentrations and an amount of acidophilic Fe-metabolizing species.…”

Section: Microorganismsmentioning

confidence: 99%

Abundance and fate of thallium and its stable isotopes in the environment

Migaszewski

Gałuszka

2021

Rev Environ Sci Biotechnol

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This overview presents the updated physicochemical characteristics of thallium and its stable isotopes (205Tl/203Tl) in the context of their occurrence and fate in abiotic and biotic systems. This also deals with the thallium behavior in geochemical interactions in and between different environmental compartments and describes its natural (geogenic) and industrial sources. The particular emphasis is placed on some extreme environments, including acid mine drainage areas where oxidation processes of Tl-bearing pyrite and other sulfides lead to very high concentrations of this metal in reactive acidic waters. Many geochemical studies have also employed stable thallium isotopes to reconstruct redox conditions in different environmental systems, to fingerprint relative pollution source strengths and to evaluate mobility of this element and its geochemical interactions in the mineral-water and soil–plant systems. This is the reason why this overview also highlights the growing potential of stable Tl isotopes in solving different geologic and environmental issues. Graphic abstract

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Response of microbial communities and interactions to thallium in contaminated sediments near a pyrite mining area

Cited by 77 publications

References 87 publications

A Functionalized Silicate Adsorbent and Exploration of Its Adsorption Mechanism

A Functionalized Silicate Adsorbent and Exploration of Its Adsorption Mechanism

Ecological Gradient Analysis and Environmental Interpretation of Cyclocarya paliurus Communities

Abundance and fate of thallium and its stable isotopes in the environment

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