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Interactions between earthworms, trees, soil nutrition and ...

2003-10-1 · Pb/Zn mine tailings were obtained from Shaoguan, Guangdong Province of China, and topsoil mixture (referred to here as ''clean soil'') was purchased from a commercial supplier (Agribusiness Limited, Hong Kong). Both were air-dried and screened through a 2-mm sieve before use.

Coatings | Free Full-Text | Reactive Water Vapor Barrier ...

Paper packaging materials have been widely applied in our daily life. To maintain the quality of packed goods as well as the mechanical property, there is a need to enhance the paper water vapor barrier function. Although long-chain cellulose esters with saturated aliphatic chains have been employed as barrier coatings due to their excellent hydrophobicity as well as film-forming properties ...

Do arsenate reductase activities and oxalate exudation ...

2018-4-11 · Purpose Although arsenic (As) hyperaccumulation is a constitutive property for Pteris vittata, there is intraspecific variation in As accumulation among metallicolous (from As-contaminated soils) and nonmetallicolous populations (from uncontaminated soils) and the related mechanisms is still not clear. Materials and methods Pot trials, hydroponic culture, and manual simulation were conducted ...

Revegetation of lead/zinc mine tailings at shaoguan ...

1997-1-1 · The Shaoguan lead/zinc mine is located in Guangdong Province, south of China. The residual tailing materials from the extraction of lead and zinc ores have been retained in a tailing pond since 1986 as a slurry. The operation ceased in 1978 and the tailings became arid in 1980 with a pH of 10.

Shifts in microbial community composition and function in ...

2013-3-4 · In an attempt to link the microbial community composition and function in mine tailings to the generation of acid mine drainage, we simultaneously explored the geochemistry and microbiology of six tailings collected from a lead/zinc mine, i.e. …

Review of Heavy Metals Pollution in China in Agricultural ...

2018-6-6 · Introduction. Soil is the subsystem for biogeochemical cycles such as nutrient recycling, energy exchange, moderation of greenhouse gas fluxes and recycling of carbon.1,2 Soil management is key to maintaining high quality food and fiber production for the world''s growing population.3 However, as agricultural inputs, urbanization and economic development continue, heavy metals are being ...

Depth-related variability in viral communities in highly ...

2020-6-9 · The Fankou Pb/Zn sulfidic mine tailings site (25° 2′ 56.5″ N, 113° 39′ 48.5″ E) is located in Shaoguan, Guangdong province, China. Extremely acidic, heavy metal-rich drainage is a persistent feature due to microbially mediated dissolution of sulfide minerals in the tailings at this site.

Shaoguan | China | Britannica

Shaoguan, Wade-Giles romanization Shao-kuan, formerly Shaozhou or Qujiang, city, northern Guangdong sheng (province), southern China lies along the Bei River at the point where it is formed by the junction of the Wu River, flowing southeast from the borders of Hunan, and the Zhen River, flowing southwest from the borders of Jiangxi province. Shaoguan thus commands not only the principal ...

Immobilization of Cadmium by Molecular Sieve and ...

2021-5-12 · land (Figure S1) in Shaoguan, Guangdong, China (23 530–25 310N, 112 50–114 450E). This region has a humid subtropical climate with an annual average rainfall of 1640 mm and temperature of 20.1 C. Soils 1 and 2 were collected from a farmyard and a cropland, respectively, close to a smelting plant in Dongtang, Renhua county. Soil 3 was sampled

Acid mine drainage affects the diversity and metal ...

2019-2-1 · Acid mine drainage (AMD) refers to acidic runoff originating from active or abandoned mining sites and is a global environmental problem. The low pH and high concentrations of sulfate and dissolved toxic metals in AMD are significant threats to the surrounding environments. However, AMD can promote opportunities for certain forms of life.

Comprehensive utilization of lead–zinc tailings, part 1 ...

2015-6-1 · The Fankou lead and zinc mine is located in Renhua, 48 km north of Shaoguan, Guangdong, China ().This mine is the largest production base of lead and zinc in China. Approximately 5500 tonnes of lead–zinc ore containing rich metals such as copper, silver, gold …

guangzhou concasseur guangzhou

Guangdong Shaoguan 70tph calcaire ... - concasseur . 2018-8-31 Shaoguan est situé dans la partie nord de la province de Guangdong, la partie supérieure de la rivière North, Zhenjiang, Wujiang, l''intersection de Beijiang Sanshui et la province du Hunan, province du Jiangxi, adjacente au Guangxi, connue sous le nom de «trois voies de la ...

Behavioural development of school-aged children who live ...

The Dabaoshan Mine, built in 1958, is located in the southeast of Shaoguan City, Guangdong Province, and is considered as a large-scale and integrative quarrying mine, which plays an important role as a base for both nonferrous metal materials and steel industry in southern China. The Dabaoshan Mine is a multi-metal sulphide mineral deposit.

Monitoring and assessment of heavy metal contamination …

2016-5-10 · Monitoring and assessment of heavy metal contamination in a constructed wetland in Shaoguan (Guangdong ..., Battocchio C, Carlini L, Iucci G, Casalboni M, De Matteis F, Casciardi ... the top five similar articles we use a word-weighted algorithm to compare words from the Title and Abstract of each citation. Heavy metals in wetland plants and ...

A workflow of massive identification and application of ...

2017-10-22 · 1 INTRODUCTION. Molecular phylogenetic studies rely mostly on analyzing the signals in DNA sequences to gain information on organisms'' evolutionary relationships (Delsuc, Brinkmann, & Philippe, 2005; Thomson, Wang, & Johnson, 2010).The widely and frequently used mitochondrial genes/genome have the drawbacks of close linkage and maternal inheritance.

Cadmium contamination of rice from various polluted …

2015-6-6 · A total of 484 rice samples were collected from five polluted areas in China to investigate the cadmium (Cd) contamination of rice and its potential health risks. The mean Cd contents of analyzed rice samples obtained from different areas ranged from 0.149 to 0.189 mg·kg−1. Cd concentrations in more than 18 % of rice samples exceeded the maximum allowable Cd concentration, and the highest ...

Heavy metal contaminations in soil-rice system: source ...

2016-7-9 · Heavy metal contents (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) in 99 pairs of soil-rice plant samples were evaluated from the downwind directions of a large thermal power plant in Shaoguan City, Guangdong Province, China. Results indicate that there is a substantial buildup of As, Cd, Cu, Pb, and Zn in the predominant wind direction of the power plant.

Heavy metal contaminations in soil-rice system: source ...

2016-7-9 · Heavy metal contents (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) in 99 pairs of soil–rice plant samples were evaluated from the downwind directions of a large thermal power plant in Shaoguan City, Guangdong Province, China. Results indicate that there is a substantial buildup of As, Cd, Cu, Pb, and Zn in the predominant wind direction of the power plant. The significant correlations between S and ...

Shifts in microbial community composition and function in ...

2013-3-4 · The Fankou Pb/Zn Mine (25°2′57.5″N, 113°39′34.1″E) is located in Shaoguan, Guangdong Province, China (Fig. 1). The mine has yielded approximately 364 million cubic meters of tailings, which contains high contents of iron and sulfur (Huang et al., …

Fractal and Multifractal Properties of Geochemical Fields ...

A fractal model, introduced by De Wijs to study the distribution, redistribution, or enrichment/depletion of element concentrations in a region, has become widely accepted. This paper uses it to simulate various geochemical fields for element concentration values. The frequency distribution and spatial pattern of the simulated values or "concentrations" are analyzed by the method of ...

Efficient inhibition of heavy metal release from mine ...

2016-11-15 · The mine tailings were from Dabaoshan mine in Shaoguan, China, an area that receives a lot of acid rain these years . The inhibition of heavy metal release in simulated AMD by TETA-Mt in comparison to TETA and Mt was determined at different acid rain pH and temperatures, and the remediation mechanism was also proposed.

Chine : la pollution du sol par des mines ravage des ...

2019-12-2 · La mine Dabaoshan, est ainsi l''un des principaux pollueurs de Shaoguan, une ville montagneuse du Guangdong. La mine, qui produit chaque année quelque 6 000 tonnes de cuivre et 850 000 tonnes de minerai de fer, déverse un volume grandissant de boues et d''eaux usées qui ont contaminées quelques 585 hectares sur les berges en aval de la ...

Do arsenate reductase activities and oxalate exudation ...

2018-4-11 · Spores of P. vittata collection. Plant culture. The spores of each population of P. vittata were sprinkled on arable land soils in a plastic tray, respectively. The tray was covered with plastic cling film to maintain moisture. After germination, the sporelings were fertilized biweekly with 20% Hoagland''s nutrient solution (Hoagland and Arnon 1938): 0.2 mM KH 2 PO 4, 1.0 mM KNO 3, 1.0 mM Ca ...