scholarly journals Recovery of Cobalt as Cobalt Oxalate from Cobalt Tailings Using Moderately Thermophilic Bioleaching Technology and Selective Sequential Extraction

Minerals ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 67 ◽  
Author(s):  
Guobao Chen ◽  
Hongying Yang ◽  
Haijun Li ◽  
Linlin Tong
Keyword(s):  
Sequential Extraction ◽  
Moderately Thermophilic ◽  
Selective Sequential Extraction ◽  
Cobalt Oxalate

Effect of Pb and Cd on Cu adsorption by sand–bentonite liners

2005 ◽  
Vol 32 (1) ◽  
pp. 241-249 ◽  
Author(s):  
Saleh Kaoser ◽  
Suzelle Barrington ◽  
Maria Elektorowicz ◽  
Li Wang
Keyword(s):  
Heavy Metal ◽  
Sequential Extraction ◽  
Metal Cations ◽  
Pressure Head ◽  
Breakthrough Curves ◽  
Metal Adsorption ◽  
Liner Material ◽  
Selective Sequential Extraction ◽  
Total Metal ◽  
Sequential Extraction Analysis

The mobility of Cu alone and in the presence of Cd (compatible) and Pb (incompatible) was studied using laboratory columns packed with a 95 wt.% sand and 5 wt.% bentonite mixture. The liner material was subjected to one of four heavy metal solutions using a pressure head of 7 kPa: 2.0 cmol(+) Cu/L solution; 1.0 cmol(+) Cu and 1.0 cmol(+) Cd/L solution for a total of 2.0 cmol(+)/L solution; and 1.0 cmol(+) Cu and 1.0 cmol(+) Pb/L solution for a total of 2.0 cmol(+)/L solution. The effluents and the liner samples were analyzed for Cu, Pb, and Cd. The breakthrough curves indicated that Cd was the most mobile of the metal cations, whereas Pb was the least. Total metal adsorption was greatest for Cu with Pb, followed by that of Cu with Cd, and then that of Cu alone, showing that Cu is compatible with Cd but not Pb. The selective sequential extraction analysis indicated that most of the Cu was precipitated by the carbonate and hydroxide fractions.Key words: Cd, Pb, Cu, sand–bentonite liners, adsorption, leaching.

Effect of Soil pH on Immobilization of Lead by Phosphate-Solubilizing Bacteria

2014 ◽  
Vol 955-959 ◽  
pp. 3595-3599
Author(s):  
Li Ping Dong ◽  
Xiao Li Zhu ◽  
Ya Ya Xu ◽  
Jian Xia Zhang ◽  
Jiao Qin Liu ◽  
...  
Keyword(s):  
Sequential Extraction ◽  
Soil Ph ◽  
Contaminated Soil ◽  
Extraction Methods ◽  
Phosphate Solubilizing Bacteria ◽  
Chemical Forms ◽  
Selective Sequential Extraction ◽  
Remediation Efficiency ◽  
Phosphate Solubilizing ◽  
Pb Immobilization

Two phosphate-solubilizing bacteria were used to immobilize the lead in contaminated soil using the selective sequential extraction methods to detect the chemical forms of lead. The results showed that PSB 3-5-1-1 had higher ability of Pb immobilization compared with ID-a .The beat remediation efficiency could be obtained when pH is 6.

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