Conversion of Chromium Ore Processing Residue to Chrome Steel

2008 ◽  
Author(s):  
Jay N. Meegoda ◽  
Wiwat Kamolpornwijit ◽  
Zhengbo Hu ◽  
Robert Mueller ◽  
Ravi Patraju
Keyword(s):  
Chrome Steel ◽  
Chromium Ore ◽  
Ore Processing

Chrome Steel from Chromium Ore Processing Residue

2011 ◽  
Author(s):  
Wiwat Kamolpornwijit ◽  
Jay N. Meegoda
Keyword(s):  
Chrome Steel ◽  
Chromium Ore ◽  
Ore Processing

scholarly journals Complete Reduction of Hazardous Cr(VI) in Chromium Ore Processing Residue Dump Site

2018 ◽  
Vol 30 (3) ◽  
pp. 620-624 ◽  
Author(s):  
Vanitha Murugaiyan ◽  
T. Sehar ◽  
S. Selvaraj ◽  
P. Kamatchi Selvaraj
Keyword(s):  
Dump Site ◽  
Complete Reduction ◽  
Chromium Ore ◽  
Ore Processing

Optimisation of metal extraction from chromium ore processing residue in New Jersey, USA

2018 ◽  
Vol 13 (4) ◽  
pp. 98-107
Author(s):  
Wiwat Kamolpornwijit ◽  
Jay N Meegoda ◽  
Janitha H Batagoda
Keyword(s):  
New Jersey ◽  
Metal Extraction ◽  
Chromium Ore ◽  
Ore Processing

Specific Gravity of Expansive Chromium Ore Processing Residue with Complex Microstructure

2010 ◽  
Vol 33 (4) ◽  
pp. 102836 ◽  
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
Andrew M. Millspaugh ◽  
James M. Tinjum ◽  
Timothy A. Boecher
Keyword(s):  
Specific Gravity ◽  
Chromium Ore ◽  
Ore Processing

scholarly journals Adsorption Characteristics and Transport Behavior of Cr(VI) in Shallow Aquifers Surrounding a Chromium Ore Processing Residue (COPR) Dumpsite

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Yu Liu ◽  
Yin Li ◽  
Yucheng Hu ◽  
Khan M. G. Mostofa ◽  
Siliang Li ◽  
...  
Keyword(s):  
Shallow Aquifer ◽  
Column Experiments ◽  
Silty Clay ◽  
Shallow Aquifers ◽  
Adsorption Characteristics ◽  
Comprehensive Management ◽  
Chromium Ore ◽  
Transport Behavior ◽  
Ore Processing ◽  
Pseudo Second Order

This study explored the stratigraphic distribution and soil/shallow aquifer characteristics surrounding a chromium ore processing residue (COPR) dumpsite at a former chemical factory in China. Total Cr levels in top soils (5–10 cm) nearby the COPR dumpsite were in the range of 8571.4–10711.4 mg/kg. Shallow aquifers (1–6 m) nearby the COPR dumpsite showed a maximum total Cr level of 9756.7 mg/kg. The concentrations of Cr(VI) in groundwater nearby the COPR dumpsite were 766.9–1347.5 mg/L. These results display that the top soils, shallow aquifers, and groundwater of the study site are severely polluted by Cr(VI). Then, three aquifers (silt, clay, and silty clay), respectively, collected from the depth of 1.4–2.4 m, 2.4–4.8 m, and 4.8–11.00 m were first used to evaluate the adsorption characteristics and transport behavior of Cr(VI) in shallow aquifers by both batch and column experiments. The adsorption of Cr(VI) on tested aquifers was well described by pseudo-second-order equation and Freundlich model. The adsorption capacities of Cr(VI) on three aquifers followed the order: clay > silty clay > silt. The kinetics proved that Cr(VI) is not easily adsorbed by the aquifer mediums but transports with groundwater. Thermodynamics indicated that Cr(VI) adsorption on tested aquifers was feasible, spontaneous, and endothermic. Cr(VI) adsorption on tested aquifers decreased with increasing pH. Furthermore, the transport of Cr(VI) in adsorption columns followed the sequence of clay < silty clay < silt. Desorption column experiments infer that the Cr(VI) adsorbed on aquifers will desorb and release into groundwater in the case of rainwater leaching. Therefore, a proper treatment of the COPR and a comprehensive management of soils are vital to prevent groundwater pollution.

Modifications to EPA Method 3060A to Improve Extraction of Cr(VI) from Chromium Ore Processing Residue-Contaminated Soils

2017 ◽  
Vol 51 (19) ◽  
pp. 11235-11243 ◽  
Author(s):  
Christopher T. Mills ◽  
Carleton R. Bern ◽  
Ruth E. Wolf ◽  
Andrea L. Foster ◽  
Jean M. Morrison ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Chromium Ore ◽  
Ore Processing

CHALLENGES OF ACCURATELY DETERMINING THE CR(VI) CONTENT OF SOILS CONTAMINATED WITH CHROMIUM ORE PROCESSING RESIDUE

2016 ◽  
Author(s):  
Christopher T. Mills ◽  
◽  
Andrea L. Foster ◽  
Carleton R. Bern ◽  
Ruth E. Wolf ◽  
...  
Keyword(s):  
Chromium Ore ◽  
Ore Processing
Sign in / Sign up

Export Citation Format

Share Document