Ecological environment quality evaluation and evolution analysis of a rare earth mining area under different disturbance conditions

The transmission of stock price fluctuations of listed companies in the rare earth industry has complex characteristics. Mastering its transmission law is of great meaning to understand the relationship between the upstream and downstream of the rare earth industry chain and market investment. This article uses the time series of daily closing prices of stocks in the global rare earth industry chain in the past ten years as the research object. The Granger causality test and complex network theory were used to construct the risk transmission network of the industrial chain. We have identified the key stocks in the network of stock price fluctuation in the rare earth industry chain and obtained the transmission path of stock price fluctuation. According to the results: (1) The stocks of Chinese and Japanese listed companies considerably influence the transmission of the stock price fluctuation in the rare earth industry chain. (2) The transmission distance of the stock price fluctuation of each network is relatively small, and the transmission speed is relatively fast. (3) The fluctuation of stock price in the rare earth industry chain is mainly transmitted from the upstream and midstream links to the midstream and downstream links.

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“…. = β q = 0" means that X t is not the cause of the change in Y t , and the F statistic is defined as shown in Equation (5).…”

Section: Data Source and Preprocessingmentioning

confidence: 99%

“…The current research on rare earth materials is mainly focused on the global rare earth resource exploitation [4][5][6], China's rare earth industrial policy [7][8][9], and supply chain in the rare earth industry chain [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Transmission Mechanism of Stock Price Fluctuation in the Rare Earth Industry Chain

2021

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“…4,5 The average flow rate in a single rare earth mine can reach as high as 4000-10 000 m 3 d −1 of REE wastewater 5 with acidic and low chemical oxygen demand (COD). 6 Because SO 4 2− is not the basic control index in the environmental quality standard for surface water (GB3838-2002), more attention has been given to the treatment of NH 3 -N. Therefore, it is urgent to develop an effective treatment to remove ammonia nitrogen from REEs wastewater. Biological treatment coupled with leaching is the most widely used terminal treatment technology for ammonia treatment in rare earth mining areas.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of calcium hydroxide-reinforced magnesium-loaded clinoptilolite/phosphoric acid-modified biochar for NH₃-N removal from rare earth element tailing wastewater

Wang

Ding

Chen

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Remote sensing facilitates the monitoring of EEQ by observing individual components and indicators of ecosystems, such as vegetation, moisture, desertification, and surface energy balance (Li et al, 2017; Song et al, 2020; Wang et al, 2016; Xu, Li, & Li, 2021). It should be noted that an ecosystem encompasses many components that complicatedly interact with each other in a system.…”

Section: Introductionmentioning

confidence: 99%

A regional assessment of ecological environment quality in Thailand special economic zone: Spatial heterogeneous influences and future prediction

Nguyen,

Kaewthongrach,

Channumsin

et al. 2023

Land Degrad Dev

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Abstract“Eastern Economic Corridor” is a development plan under the Thailand 4.0 scheme to revitalize the economy. However, it has influenced the environment through numerous infrastructural and industrial projects. The ecological environment is the most fragile component since it is susceptible to land use, land cover changes (LULCC) and rapid development. Meanwhile, there is currently a lack of comprehensive studies on spatial heterogeneity and future simulation of ecological environment quality (EEQ). Therefore, this study aims to analyze changes in EEQ and controlling factors and to predict near‐future EEQ by adopting an integrated approach of remote sensing and spatial analyses. It revealed that the regional EEQ has considerably fluctuated in the period 2013–2021. The dynamic areas, accounting for nearly half of the area, include ecologically degraded areas in coastal urban and surrounding areas and ecologically improved areas in the eastern forest and perennial plantations. Chonburi is the most vulnerable province due to its long coast with extensive urban infrastructures and industrial estates. These changes are an integrated consequence of natural and socioeconomic impacts. Particularly, LULCC, infrastructural projects, and climate are the most crucial contributors since they directly regulate the functions of the ecological environment, which will amplify the future changes of EEQ reflected via the near‐future prediction. This research identified key controlling factors and spatial heterogeneities that are useful for policymakers and local authorities to have appropriate local‐oriented plans for each area relevant to their uniqueness. Besides, regional plans should be also considered along with regional concerns such as LULCC, crop structures, water management, and green infrastructure, as well as legal interventions to promote sustainable development in this special economic zone.

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Ecological environment quality evaluation and evolution analysis of a rare earth mining area under different disturbance conditions

Cited by 39 publications

References 11 publications

Transmission Mechanism of Stock Price Fluctuation in the Rare Earth Industry Chain

Transmission Mechanism of Stock Price Fluctuation in the Rare Earth Industry Chain

Mechanism of calcium hydroxide-reinforced magnesium-loaded clinoptilolite/phosphoric acid-modified biochar for NH₃-N removal from rare earth element tailing wastewater

A regional assessment of ecological environment quality in Thailand special economic zone: Spatial heterogeneous influences and future prediction

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Ecological environment quality evaluation and evolution analysis of a rare earth mining area under different disturbance conditions

Cited by 39 publications

References 11 publications

Transmission Mechanism of Stock Price Fluctuation in the Rare Earth Industry Chain

Transmission Mechanism of Stock Price Fluctuation in the Rare Earth Industry Chain

Mechanism of calcium hydroxide-reinforced magnesium-loaded clinoptilolite/phosphoric acid-modified biochar for NH3-N removal from rare earth element tailing wastewater

A regional assessment of ecological environment quality in Thailand special economic zone: Spatial heterogeneous influences and future prediction

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Mechanism of calcium hydroxide-reinforced magnesium-loaded clinoptilolite/phosphoric acid-modified biochar for NH₃-N removal from rare earth element tailing wastewater