Soil nematode community characteristics around the Gangue hill of Fushun West Open-pit mine

Zhang, W. D.; Xiao, Yihua; Wang, X. F.; Lv, Yi

doi:10.2478/s11687-011-0018-2

Cited by 5 publications

(3 citation statements)

References 79 publications

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“…Coal gangue hills are formed from waste materials generated during coal mining and they contain a large amount of heavy metals and other harmful substances [1][2][3][4]. The internal elements such as carbon, sulfur, and nitrogen can generate a significant amount of hazardous gases after oxidation, leading to environmental pollution [5][6][7][8][9][10]. The remaining coal inside these hills can release a substantial amount of heat through slow atmospheric oxidation, resulting in high temperatures within the gangue hills.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Parameters for Gravity Heat Pipes in Coal Gangue Hills by Measuring Thermal Power Generation

Zhang,

et al. 2023

Processes

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In order to effectively control high temperatures inside coal gangue hills, gravity heat pipes with specific spacings are vertically installed in coal gangue hills. Heat extracted from these heat pipes can be utilized for power generation through energy conversion. In this study, an equivalent model of gravity heat pipes in coal gangue hills was established and, in a laboratory setting, experimental research and optimization were conducted on power generation per unit area using the temperature difference of gravity heat pipes for electricity generation. To facilitate real-time testing of different heat pipe parameters and to display the experimental results, a multi-parameter measurement system was designed and constructed. This study systematically investigated the effects of various structural parameters such as inclination angle, heating temperature, initial absolute pressure, and working fluid height. Through single-factor experiments, it was determined that the inclination angle had no significant impact. The range of values for heating temperature, initial absolute pressure, and working fluid height were confirmed based on six sets of experiments. To maximize the performance of the thermoelectric generator, a response surface analysis experiment was conducted using the Design-Expert software. The optimal conditions were determined to be a working fluid height of 200.001 mm, an initial absolute pressure of 0.002 MPa, and a heating temperature of 413.15 K. Under these conditions, the power generation per unit area of the thermoelectric generator reached 0.122981 W/(m2·K). The accuracy of the theoretical experiments was verified through on-site industrial experiments. By calculations, it was determined that the maximum temperature difference power generation capacity per gravity heat pipe was 42.39 W. This provides a new solution for the management of coal mine gangue hills and the secondary utilization of waste energy.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Parameters for Gravity Heat Pipes in Coal Gangue Hills by Measuring Thermal Power Generation

Zhang,

et al. 2023

Processes

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“…Soil nematode as an indicator for heavy metal pollution has been widely studied in recent years. (Zhang et al, 2011;Šalamún, 2011;Martinez et al, 2018). Most of previous studies took place in an open environment such as mining area, however, under laboratory condition, the characteristics of rhizosphere nematode communities affected by specific concentrations of single and mixed heavy metals are not well studied.…”

Section: Introductionmentioning

confidence: 99%

Short-term effects of cadmium and mercury on soil nematode communities in a pot experiment

Lu¹,

Chen

Xue

et al. 2020

Helminthologia

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SummaryAnalysis of soil nematode feeding groups and functional guilds were used as a valuable tool to detect heavy metal pollution. Effects of cadmium (Cd) at 5 mg/kg, mercury (Hg) at 20mg/kg, combined Cd and Hg at 5+20mg/kg on the nematode communities were studied after three months application. Nematodes were collected from soil in rhizosphere of Morning glories (Pharhiris nil) which were applied as heavy metal accumulators and were grown in the experimental pots. Both single and combined heavy metals had marked effects on the nematode abundance, life-history strategies and feeding type composition. Bacteriovores and c-p 2 group were found to be the most abundant trophic group and functional guild, respectively. Acrobeloides and Pratylenchus were the most two abundant genera, decreasing number of them was responsible for the significant difference between control and polluted treatments. Cd-5 and Cd-Hg 5+20 presented lower values of nematode diversity index (H’) and evenness index (J’) than Hg-20. The combination of Cd and Hg showed lower nematode trophic diversity (TD), in comparison with single Cd or Hg. Conversely, heavy metals addition exhibited no pronounced effect on Maturity index (MI), structural index (SI) and enrichment index (EI). Our results demonstrate that genera composition is a better indicator to short-term heavy metal effects than some common indicator indices and emphasize that deeper assemblage analyses are needed for a correct interpretation of short-term disturbance on soil nematodes.

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“…Soil nematode communities have the ability to continuously recover from disturbance and nematodes play a role in creating and changing the soil environment, especially in relation to the development of soil fertility. As mine reclamation is known to accelerate the rate of nematode community recovery, the response of these organisms can be used as an ecological indicator of soil restoration at mining sites (Caixeta et al, 2016;Chen et al, 2014;Hanel, 2008;Zhang, Xiao, et al, 2011).…”

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confidence: 99%

Restoration of damaged ecosystems in desert steppe open‐pit coal mines: Effects on soil nematode communities and functions

Han

Gao

et al. 2021

Land Degrad Dev

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Repair of damaged areas in open-pit (opencast) coal mines has emerged as an important environmental concern. Our research investigated the mechanism by which different ecological restoration methods affected soil nematode communities in damaged areas of desert steppe coal mines. Using high-throughput sequencing technology, nematode community composition, diversity, and function were analyzed to determine the response of nematodes to different ecological restoration methods in damaged areas of coal mines. For slope rehabilitation, vegetation blanket restoration exhibited more favorable effects than those exhibited by vegetation bag restoration and natural restoration. For rehabilitation of the platform area under the slope, the diversity of soil nematodes and the soil fauna analysis under alien soil restoration conditions were performed and exhibited similar characteristics to those of the native vegetation. Findings based on Linear discriminant analysis Effect Size (LEfSe) multi-level discriminant analysis and determination of shared genera suggest that Paraphelenchus, Cervidellus, Panagrolaimus, Microdorylaimus, Cephalobus, and Ecumenicus may be the key genera of soil nematodes in the damaged ecosystem of open-pit coal mines in the desert steppe. We found that reasonable water and fertilizer management in slope restoration and under-slope platform area restoration may play a key role in the restoration of damaged ecosystems in open-pit coal mines. We comprehensively analyzed the response of soil nematode communities and their functions to different ecological restoration methods, and provided a reference for evaluating the quality of underground ecosystem restoration of damaged areas in abandoned desert steppe open-pit coal mines.

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Soil nematode community characteristics around the Gangue hill of Fushun West Open-pit mine

Cited by 5 publications

References 79 publications

Optimization of the Parameters for Gravity Heat Pipes in Coal Gangue Hills by Measuring Thermal Power Generation

Optimization of the Parameters for Gravity Heat Pipes in Coal Gangue Hills by Measuring Thermal Power Generation

Short-term effects of cadmium and mercury on soil nematode communities in a pot experiment

Restoration of damaged ecosystems in desert steppe open‐pit coal mines: Effects on soil nematode communities and functions

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