The distribution characteristics of rare metal elements in surface sediments from four coastal bays on the northwestern South China Sea

Wang, Shuhong; Jin, Li; Wu, Shuzhuang; Yan, Wen; Huang, Wenqi; Li, Miao; Zhong, Chen

doi:10.1016/j.ecss.2015.12.001

Cited by 14 publications

(3 citation statements)

References 17 publications

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“…In recent years, with the demands of ZJB’s economic development, the development of ports and channels, energy bases, harbor industries, and tidal flats in the bay have been included in the economic development plan of ZJB. In addition to the above projects, pollution discharge from land sources, fishery, and aquaculture in addition to port and shipping pollution have all changed the ZJB water environment to varying degrees, with the water quality affected to some extent [ 37 ]. Over recent decades, rapid economic development and urbanization have significantly impacted the ZJB environment.…”

Section: Study Areamentioning

confidence: 99%

Spatiotemporal Distribution Characteristics of Nutrients in the Drowned Tidal Inlet under the Influence of Tides: A Case Study of Zhanjiang Bay, China

Wang

Zhou

Chen

et al. 2021

IJERPH

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The tidal dynamics and the characteristics of pollutant migration in the drowned-valley tidal inlet, a typical unit of coastal tidal inlets, are strongly influenced by geomorphological features. Along with the development of society and the economy, the hydrodynamic and water quality environment of the tidal inlet is also becoming more disturbed by human activities, such as reclamation of the sea and the construction of large bridges. In this study, a typical drowned-valley tidal inlet, Zhanjiang Bay (ZJB), was selected for the establishment of a model via coupling of a tidal hydrodynamic model and water quality numerical model. This model can be used to simulate the migration and diffusion of pollutants in ZJB. The spatial and temporal variation processes of water quality factors of the bay under the influence of special geomorphic units was simulated at the tidal-inlet entrance, the flood/ebb tidal delta, and the tidal basin. The results show that ZJB has strong tidal currents that are significantly affected by the terrain. Under the influence of the terrain and tidal currents, the phosphorus and nitrogen concentration at the flood-tide and ebb-tide moments showed obvious temporal and spatial differences in the ebb-tide delta, tidal-inlet entrance, flood-tide delta, and tidal basin. In this study, we analyzed the response mechanism of the water quality environment to the drowned-valley tidal inlet, and this can provide theoretical guidance and a basis for decision-making toward protecting the ecology and water security of ZJB.

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Section: Study Areamentioning

confidence: 99%

Spatiotemporal Distribution Characteristics of Nutrients in the Drowned Tidal Inlet under the Influence of Tides: A Case Study of Zhanjiang Bay, China

Wang

Zhou

Chen

et al. 2021

IJERPH

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“…Several researchers, Chaudhari et al (1981), Rajmanickam and Gujar (1993), Rao et al (2005), Angusamy and Rajamanickam (2006), Gandhi et al (2008), Ramathan et al(2009), Gayathri et al (2017), and Sajimol et al (2017) carried out systematic granulometric, and heavy mineral studies of the east and west coasts of India [15][16][17][18][19][20][21][22]. Outside India also, many studies were conducted on mineralogy, chemistry, and provenance of beach minerals in South China Sea [23], Africa [24], Sri Lanka [25], Egypt [2], and Somaliland coastal areas [10]. Investigation on texture and mineralogy of beach sediments play a prime role in deriving the depositional history of beach regions [18].…”

Section: Introductionmentioning

confidence: 99%

Monazite chemistry and its distribution along the coast of Neendakara–Kayamkulam belt, Kerala, India

et al. 2020

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The beach sands along the coasts of India contain large reserves of strategic minerals like ilmenite, monazite, zircon, etc. Monazite mineral is primarily used as an ore for extracting rare earths particularly cerium and lanthanum. In the present study, the chemistry and distribution of monazite found in the beach sands of Neendakara-Kayamkulam belt in Kerala, south India, is studied using advanced techniques and standardized methods. Beach sediments were collected and analyzed for the texture, and mineralogy reveals that the study area contains characteristically fine sand with maximum 98.9% total heavy minerals (THM) content with ilmenite as predominant mineral species. The content of monazite ranges from 0.1 to 1.4%. A combination of unit operations like gravity separation, magnetic separation and electrostatic separation techniques were applied to the beach sand to recover monazite mineral. The data indicate that samples show a maximum yield of about 81% for THM and 0.5% for monazite. The ED-XRF, XRD and SEM-EDS analysis gives reliable results on the chemistry of monazite. The major chemical constituents of monazite mineral like Ce 2 O 3 , La 2 O 3 , P 2 O 5 corresponds to 26.658, 13.421 and 23.649%, respectively. The SEM reveals the weathering mechanism, both mechanical and chemical, occurred in monazite mineral. Advanced characterization of monazite mineral will influence positively the efficiency of determining their potential applications.

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“…Currently, it has been extensively applied in aerospace, medicine, navigation, and catalytic industries. Although abundant in the Earth's crust, titanium is still regarded as a rare metal because of the difficulties in extraction and its wide distribution [4]. Ilmenite and rutile are the main resources to beneficiation in TiO 2 content for subsequent hydrometallurgy.…”

Section: Introductionmentioning

confidence: 99%

Flotability Improvement of Ilmenite Using Attrition-Scrubbing as a Pretreatment Method

et al. 2017

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Flotation technology of the recovery and utilization of ilmenite from tailings of iron beneficiated in Panzhihua was investigated based on mineralogical study. The results of mineralogical study show that the main occurrence of the valuable mineral are liberated grains of ilmenite. Experimental results of flotation conditions show that attrition-scrubbing raw ores exhibit good flotability with higher recoveries and a slight decrease in grade compared to ores without attrition-scrubbing. Further, open-circuit experiments also prove the superiority of attrition-scrubbing raw ores. The results of closed-circuit experiments show that qualified ilmenite concentrate can be obtained and the yield, grade, and recovery are 22.26%, 47.06%, and 60.73%, respectively. Theoretical study and analysis show that there are two contributions to superior flotability for attrition-scrubbing samples. The first is that the attrition-scrubbing samples can uncover more ferrous ions on the newly-produced fresh ilmenite surface, resulting in the increase in active sites. The other is that in the process of attrition-scrubbing, the transformation of ferrous ions to ferric ions can be promoted.

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The distribution characteristics of rare metal elements in surface sediments from four coastal bays on the northwestern South China Sea

Cited by 14 publications

References 17 publications

Spatiotemporal Distribution Characteristics of Nutrients in the Drowned Tidal Inlet under the Influence of Tides: A Case Study of Zhanjiang Bay, China

Spatiotemporal Distribution Characteristics of Nutrients in the Drowned Tidal Inlet under the Influence of Tides: A Case Study of Zhanjiang Bay, China

Monazite chemistry and its distribution along the coast of Neendakara–Kayamkulam belt, Kerala, India

Flotability Improvement of Ilmenite Using Attrition-Scrubbing as a Pretreatment Method

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