Reducing geogenic arsenic leaching from excavated sedimentary soil using zero-valent iron amendment followed by dry magnetic separation: A case study

2020 ◽  
Vol 724 ◽  
pp. 138203
Author(s):  
Jining Li ◽  
Shunsuke Yoshi ◽  
Yohey Hashimoto ◽  
Lei Wang ◽  
Fenghe Wang ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Zero Valent Iron ◽  
Dry Magnetic Separation ◽  
Arsenic Leaching ◽  
Geogenic Arsenic

scholarly journals Evaluation of Magnetic Separation Efficiency on a Cassiterite-Bearing Skarn Ore by Means of Integrative SEM-Based Image and XRF–XRD Data Analysis

Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 390 ◽  
Author(s):  
Markus Buchmann ◽  
Edgar Schach ◽  
Raimon Tolosana-Delgado ◽  
Thomas Leißner ◽  
Jennifer Astoveza ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Iron Oxides ◽  
Separation Efficiency ◽  
Analysis Data ◽  
Gangue Mineral ◽  
Data Partition ◽  
Local Regression ◽  
Separation Processes ◽  
Magnetic Separator

Image analysis data obtained from scanning electron microscopy provided data for a detailed evaluation of the separation efficiency for various processes involving the beneficiation of particulate materials. A dry magnetic separation by a drum type magnetic separator served as a case study to visualize effects of processing of a skarn ore with a high content of cassiterite as ore mineral (~4 wt%). For this material, iron oxides and silicates are the main gangue mineral groups. Based on the obtained data, partition curves were generated with the help of local regression. From the partition curves, the separation efficiency was evaluated and the relevant particle properties deduced. A detailed analysis of the bias of the quantitative mineralogical data is presented. This bias was monitored and further analyzed in detail. Thorough analysis of feed and products of magnetic separation enabled identification of the most important factors that control losses of cassiterite to the magnetic product, namely the association with iron oxides and particle sizes below ~40 µm. The introduced methodology is a general approach applicable for the optimization of different separation processes and is not limited to the presented case study.

scholarly journals Influence of nanoscale zero-valent iron on geochemical properties of groundwater and vinyl chloride degradation: A field case study

2010 ◽  
Vol 44 (1) ◽  
pp. 131-140 ◽  
Author(s):  
Yu-Ting Wei ◽  
Shian-Chee Wu ◽  
Chih-Ming Chou ◽  
Choi-Hong Che ◽  
Shin-Mu Tsai ◽  
...  
Keyword(s):  
Vinyl Chloride ◽  
Zero Valent Iron ◽  
Field Case ◽  
Geochemical Properties ◽  
Nanoscale Zero Valent Iron

How reliable is the K-Ar glauconite chronometer? A case study of Eocene sediments from the Isle of Wight

Clay Minerals ◽  
2005 ◽  
Vol 40 (2) ◽  
pp. 167-176 ◽  
Author(s):  
N. Clauer ◽  
J. M. Huggett ◽  
S. Hillier
Keyword(s):  
Magnetic Separation ◽  
Isotopic Age ◽  
High Gradient Magnetic Separation ◽  
Isle Of Wight ◽  
High Gradient ◽  
Final Selection ◽  
Age Determinations ◽  
Highly Evolved

AbstractK-Ar ages of Eocene glauconite pellets from the Isle of Wight are related to quantified amounts of older glauconite pellets and to occurrences of detrital mica/illite particles that might have been added to synsedimentary pellets during reworking processes. Addition of older glauconite did not significantly bias the K-Ar dates, as the results most often provide the expected stratigraphic reference ages or even significantly lower ages. Alternatively, K-Ar dates significantly greater than those suggested by the stratigraphy appear to result from non-glauconized detrital mica in the pellets which is not always removable, even by high-gradient magnetic separation.Unexpected ‘old’ K-Ar glauconite ages do not result from misapplication of the method, but from inability to systematically identify and remove the `contaminant' particles from glauconite splits. Analysis of highly evolved glauconite separates is definitely appropriate for reliable isotopic age determinations, but it might not be enough for the final selection, as long-lasting diagenesis might have taken over the synsedimentary process. Much if not all depends on the separation and characterization of the separates, but also on the completion of the glauconitization process which effects cannot always be anticipated.

Comprehensive Utilization of Sulfuric Acid Residue in Small Chemical Enterprise

2011 ◽  
Vol 99-100 ◽  
pp. 977-981 ◽  
Author(s):  
Zheng Wen Huang ◽  
Rong Su ◽  
Bo Yu ◽  
Jun Sun
Keyword(s):  
Sulfuric Acid ◽  
Chemical Composition ◽  
Magnetic Separation ◽  
Melting Process ◽  
Gravity Separation ◽  
Smelting Furnace ◽  
Comprehensive Utilization ◽  
Comprehensive Comparison ◽  
Small Chemical

Sulfuric acid residue is one kind of important secondary resource, its comprehensive utilization has drawn extensive attention. Based on analyzing the chemical composition of sulfuric acid residue, through comprehensive comparison of flotation, gravity separation, magnetized baking, magnetic separation and other joint technical processes, it is showed that the chemical-magnetic separation is reasonable by evaluating the applicable ability. Then introduced a case study on comprehensive utilization of sulfuric acid residue in Shikefeng chemical Co., LTD in Luzhou City, the duplex melting process combined advanced induction furnaces with smelting furnace was put forward. Finally, it's concluded that there are many advantages of the duplex melting process, it’s more suitable for the comprehensive utilization of sulfuric acid residue in small chemical enterprise.

Sign in / Sign up

Export Citation Format

Share Document