Simulation of adsorption of gold nanoparticles carried by gas ascending from the Earth's interior in alluvial cover of the middle-lower reaches of the Yangtze River

被引：51

作者：

Cao, J. J. ^{[1
]}

Hu, X. Y. ^{[1
]}

Jiang, Z. T. ^{[1
]}

Li, H. W. ^{[1
]}

Zou, X. Z. ^{[2
]}

机构：

[1] Sun Yat Sen Univ, Dept Earth Sci, Guangzhou 510275, Guangdong, Peoples R China

[2] Guangdong Acad Agr Sci, Guangdong Lab Nutrient Cycling & Farmland Conserv, Soil & Fertilizer Res Inst, Guangzhou, Guangdong, Peoples R China

来源：

GEOFLUIDS | 2010年 / 10卷 / 03期

关键词：

adsorption; alluvium; gas; gold nanoparticles; simulation experiment; SURFACE-CHARGE; GEOGAS; GOETHITE; DEPOSIT; PARTICLES; MIGRATION; TRANSPORT; TERRAINS; NEVADA; ANIONS;

D O I：

10.1111/j.1468-8123.2010.00287.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The adsorption onto other minerals of charged gold nanoparticles, carried by gas ascending from the Earth's interior, is an important component of their transport and deposition in surficial cover such as alluvial, aeolian, and glacial sediments. To simulate the adsorption of these particles, an experiment was conducted in which a flow of air that contained gold nanoparticles was passed upward through a sample of alluvium from the middle-lower reaches of the Yangtze River. These experiments showed that gold nanoparticles are adsorbed on kaolinite, halloysite, goethite, and hematite in the alluvial cover. Both the gold nanoparticles and minerals (i.e., kaolinite, halloysite, goethite, and hematite) carry surface charges that provide them with excellent adsorption properties. This study showed that the specific mineral composition of surficial alluvial cover affects the concentration of gold nanoparticles in the ascending gas. This phenomenon may plausibly be used in exploration for concealed gold, copper-gold, and silver-gold deposits in areas of thick alluvial cover. Geofluids (2010) 10, 438-446.

引用

页码：438 / 446

页数：9

共 45 条

[1] Variable charge characteristics of selected Andisols from the Azores, Portugal [J].

Auxtero, E ;

Madeira, M ;

Sousa, E .

CATENA, 2004, 56 (1-3) :111-125

[2] HIGH-RESOLUTION MICROSCOPY OF GOLD IN UNOXIDIZED ORE FROM THE CARLIN MINE, NEVADA [J].

BAKKEN, BM ;

HOCHELLA, MF ;

MARSHALL, AF ;

TURNER, AM .

ECONOMIC GEOLOGY, 1989, 84 (01) :171-179

[3]

BARCLAY SA, 2000, INT ASS SEDIMENTOLOG, V29, P103

[4] Generation of charged clusters during thermal evaporation of gold [J].

Barnes, MC ;

Jeon, ID ;

Kim, DY ;

Hwang, NM .

JOURNAL OF CRYSTAL GROWTH, 2002, 242 (3-4) :455-462

[5] Adsorption mechanisms of trivalent gold on iron- and aluminum-(oxy)hydroxides.: Part 1:: X-ray absorption and Raman scattering spectroscopic studies of Au(III) adsorbed on ferrihydrite, goethite, and boehmite [J].

Berrodier, I ;

Farges, F ;

Benedetti, M ;

Winterer, M ;

Brown, GE ;

Deveughèle, M .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2004, 68 (14) :3019-3042

[6]

Boyle R.W., 1979, Geological Survey of Canada Bulletin, V280, P1

[7]

BRAHIC C, 2008, NEW SCI ENV 1009

[8] TEM observation of geogas-carried particles from the Changkeng concealed gold deposit, Guangdong Province, South China [J].

Cao, Jianjin ;

Hu, Ruizhong ;

Liang, Zhirong ;

Peng, Zhuolun .

JOURNAL OF GEOCHEMICAL EXPLORATION, 2009, 101 (03) :247-253

[9]

Cao JJ, 2005, GEOCHIM COSMOCHIM AC, V69, pA519

[10] On the origin of the name kaolin and the kaolin deposits of the Kauling and Dazhou areas, Kiangsi, China [J].

Chen, PY ;

Lin, ML ;

Zheng, Z .

APPLIED CLAY SCIENCE, 1997, 12 (1-2) :1-25

← 1 2 3 4 5 →