Enrichment characteristics and sources of the critical metal yttrium in Zhijin rare earth-containing phosphorites, Guizhou Province, China

2021 ◽  
Author(s):  
Xingxiang Gong ◽  
Shengwei Wu ◽  
Yong Xia ◽  
Zhengwei Zhang ◽  
Shan He ◽  
...  
Keyword(s):  
Rare Earth ◽  
Guizhou Province ◽  
Critical Metal ◽  
Enrichment Characteristics

Rare earth elements and critical metal content of extracted landfilled material and potential recovery opportunities

2015 ◽  
Vol 42 ◽  
pp. 128-136 ◽  
Author(s):  
Silvia C. Gutiérrez-Gutiérrez ◽  
Frédéric Coulon ◽  
Ying Jiang ◽  
Stuart Wagland
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Metal Content ◽  
Critical Metal

scholarly journals Anthropogenic Rare Earth Elements: Gadolinium in a Small Catchment in Guizhou Province, Southwest China

2019 ◽  
Vol 16 (20) ◽  
pp. 4052 ◽  
Author(s):  
Jue Zhang ◽  
Zhuhong Wang ◽  
Qixin Wu ◽  
Yanling An ◽  
Huipeng Jia ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Guizhou Province ◽  
Weak Reaction ◽  
Small Catchment ◽  
Small Stream ◽  
Small Streams ◽  
Gd Anomaly

Rare earth elements (REEs), known as “industrial vitamins”, are widely used in medical treatment, industry, agriculture, etc. However, with the increasing demand for REEs, excess REEs, such as gadolinium (Gd), are considered micropollutants in the environment. In this paper, the distributions of dissolved REEs were analyzed in three small streams, in order to determine the extent and occurrence of Gd anomalies. The shale-normalized REE patterns in the three streams were less smooth with heavy REEs higher than light REEs, for a weak reaction of the heavy REE complexes. A negative Ce (cerium) anomaly and positive samarium (Sm) and europium (Eu) anomalies were observed in the three streams and the negative Ce anomaly was affected by the pH of the alkaline rivers. However, a positive Gd anomaly was found in only a typical urban small stream, Jinzhong. With a population of approximately 60,000, Jinzhong runs by a hospital and through wastewater treatment plants (WWTPs). The concentrations of Gd in Jinzhong ranged from 1.54 to 86.65 ng/L with high anthropogenic Gd proportions (63.64%–98.07%). Anthropogenic Gd showed significant seasonal variations and distinct spatial disparities from upstream to downstream, and it was associated with certain ions such as Cl−. Anthropogenic Gd could be attributed to gadopentetic acid (Gd-DTPA), which is used in magnetic resonance imaging (MRI) in hospitals. This type of Gd was shown to be correlated with municipal wastewater. Due to the high stability and low particulate reactivity in water, anthropogenic Gd has great potential to serve as a tracer to prove the presence of medical wastewater.

scholarly journals The Future of Scandium Recovery from Wastes

2021 ◽  
Vol 5 (1) ◽  
pp. 55
Author(s):  
Olga Chernoburova ◽  
Alexandre Chagnes
Keyword(s):  
Rare Earth ◽  
Bauxite Residue ◽  
High Strength ◽  
Clean Energy ◽  
Industrial Wastes ◽  
Condensed State ◽  
No Production ◽  
Alumina Production ◽  
Energy Technologies ◽  
Critical Metal

With growing demand for renewable and clean energy technologies, the need in rare earth metals is increasing. Scandium, which is often considered a rare earth element (REE), is a critical metal mainly used in solid oxide fuel cells (SOFCs) and high strength aluminum alloys used in aerospace and 3D printing applications. Furthermore, scandium supply is limited due to its scarcity and the high cost of its production in Asia and Russia while Europe has no production of scandium. Therefore, scandium extraction from alternative resources such as secondary resources located in Europe is of great concern. Within this context, this work provides a condensed state-of-art review of the issue of scandium recovery from industrial wastes. Priority was given to addressing the technological and economic challenges associated with the recovery of scandium from the said residues, with particular emphasis on the bauxite residue from alumina production, which represents nearly 5 million tons on dry basis per year in Europe.

Trace Elements and Rare Earth Elements of Sulfide Minerals in the Tianqiao Pb-Zn Ore Deposit, Guizhou Province, China

2011 ◽  
Vol 85 (1) ◽  
pp. 189-199 ◽  
Author(s):  
ZHOU Jiaxi ◽  
HUANG Zhilong ◽  
ZHOU Guofu ◽  
LI Xiaobiao ◽  
DING Wei ◽  
...  
Keyword(s):  
Trace Elements ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Sulfide Minerals ◽  
Guizhou Province ◽  
Ore Deposit

Containing Rare Earth Phosphate Rock Processing and Rare Earth Enrichment in those Processes

2013 ◽  
Vol 734-737 ◽  
pp. 1022-1028 ◽  
Author(s):  
Guanghua Nie ◽  
Ti Chang Sun ◽  
Shuai Li ◽  
Hai Lan Li
Keyword(s):  
Rare Earth ◽  
Phosphate Rock ◽  
Guizhou Province ◽  
Western China ◽  
Leaching Rate ◽  
Test Study ◽  
Rare Earth Phosphate ◽  
Processing Techniques ◽  
Phosphate Concentrate ◽  
Phosphate Deposits

The reserve of sedimentary phosphate deposits in Guizhou province in western China is huge, but has been no development because of its difficulties of comprehensive utilization. Using mineral processing techniques, Rare earth containing phosphate rock flotation and flotation concentrate leaching test study were done. Rare earth enrichment in those processes was studied too. Through rougher flotation conditions test, it was determined that the optimal rougher flotation conditions were grinding fineness 75% -0.074mm, H2SO4, H3PO4 and SOP dosage of 10kg/t, 0.15kg/t and 0.8 kg/t. A reverse flotation flowsheet consisted of one roughing, one cleaning and one scavenging stage was used for the closed-circuit flotation tests. Phosphate concentrate could be got with P2O5, MgO, REE grade of 31.87%, 0.98%, 0.15% and recovery of 85.83%, 8.84%, 86.81% respectively. P2O5 recoveries and REE recoveries of phosphate concentrate was a positive linear relationship. Under the condition of liquid/solid3:1, acid/ore ratio 1.2, leaching time 3.5 hours and temperature 75°C, the phosphate concentrate was leached by sulfuric acid. The better indicators that P2O5 leaching rate of 95.92% and REE leaching rate of 52.11% could got.

Sign in / Sign up

Export Citation Format

Share Document