scholarly journals Evaluation of Factors Affecting Chemical Extraction of Co Ions from Contaminated Soil

10.5772/68066 ◽  
2018 ◽  
Author(s):  
Ivana Smičiklas
Keyword(s):  
Contaminated Soil ◽  
Chemical Extraction ◽  
Factors Affecting

scholarly journals Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

2020 ◽  
Vol 9 (1) ◽  
pp. 736-750
Author(s):  
Xilu Chen ◽  
Xiaomin Li ◽  
Dandan Xu ◽  
Weichun Yang ◽  
Shaoyuan Bai
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Contaminated Soil ◽  
Zero Valent Iron ◽  
Toxic Heavy Metal ◽  
Factors Affecting ◽  
Metal Pollutants ◽  
Nanoscale Zero Valent Iron ◽  
Low Toxicity ◽  
Heavy Metal Pollutants

AbstractChromium (Cr) is a common toxic heavy metal that is widely used in all kinds of industries, causing a series of environmental problems. Nanoscale zero- valent iron (nZVI) is considered to be an ideal remediation material for contaminated soil, especially for heavy metal pollutants. As a material of low toxicity and good activity, nZVI has been widely applied in the in situ remediation of soil hexavalent chromium (Cr(vi)) with mobility and toxicity in recent years. In this paper, some current technologies for the preparation of nZVI are summarized and the remediation mechanism of Cr(vi)-contaminated soil is proposed. Five classified modified nZVI materials are introduced and their remediation processes in Cr(vi)-contaminated soil are summarized. Key factors affecting the remediation of Cr(vi)-contaminated soil by nZVI are studied. Interaction mechanisms between nZVI-based materials and Cr(vi) are explored. This study provides a comprehensive review of the nZVI materials for the remediation of Cr(vi)-contaminated soil, which is conducive to reducing soil pollution.

Factors affecting the leaching behaviors of magnesium phosphate cement-stabilized/solidified Pb-contaminated soil, part II: Dosage and curing age

2017 ◽  
Vol 36 (5) ◽  
pp. 1351-1357 ◽  
Author(s):  
Ping Wang ◽  
Qiang Xue ◽  
Zhenning Yang ◽  
Jiangshan Li ◽  
Tingting Zhang ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Magnesium Phosphate ◽  
Factors Affecting ◽  
Curing Age

Speciation and solubility of heavy metals in contaminated soil using X-ray microfluorescence, EXAFS spectroscopy, chemical extraction, and thermodynamic modeling

2006 ◽  
Vol 70 (9) ◽  
pp. 2163-2190 ◽  
Author(s):  
Tatiana A. Kirpichtchikova ◽  
Alain Manceau ◽  
Lorenzo Spadini ◽  
Frédéric Panfili ◽  
Matthew A. Marcus ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Thermodynamic Modeling ◽  
Contaminated Soil ◽  
Exafs Spectroscopy ◽  
Chemical Extraction ◽  
X Ray

scholarly journals Leaching kinetics of Co(II) and Sr(II) contaminated soil via chemical extraction method

2018 ◽  
Vol 33 (3) ◽  
pp. 252-259
Author(s):  
Slavko Dimovic ◽  
Mihajlo Jovic ◽  
Marija Sljivic-Ivanovic ◽  
Vojislav Stanic ◽  
Zoran Vujovic ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Kinetic Data ◽  
Extraction Method ◽  
Ethylenediaminetetraacetic Acid ◽  
Extraction Process ◽  
Chemical Extraction ◽  
Initial Concentration ◽  
Edta Solution ◽  
Shrinking Core ◽  
Kinetics Of

Artificially contaminated soil, with mixture of Co(II) and Sr(II) ions in different proportions, was tested. The main aim was to investigate the possibility of ethylenediaminetetraacetic acid (EDTA) utilization in the chemical extraction process as a method for soil remediation in the case of mixed contamination. The efficiency of this process when EDTA of 5?10-4 molL-1 was used was low, while the application of the EDTA solution of the initial concentration 5?10-3 molL-1 or higher showed almost the same efficiency. This suggested that the application of the solution EDTA (5?10-3 molL-1) is optimal from the aspect of cost and degradation of soil properties. Furthermore, process kinetic was fitted using one parameter shrinking core models. Kinetic data modeling showed that the process is complex, demanding multi resistance kinetic model.

scholarly journals Leachability and Stability of Hexavalent-Chromium-Contaminated Soil Stabilized by Ferrous Sulfate and Calcium Polysulfide

2018 ◽  
Vol 8 (9) ◽  
pp. 1431 ◽  
Author(s):  
Ting-Ting Zhang ◽  
Qiang Xue ◽  
Ming-Li Wei
Keyword(s):  
Hexavalent Chromium ◽  
Contaminated Soil ◽  
Ferrous Sulfate ◽  
X Ray Diffraction ◽  
Factors Affecting ◽  
X Ray ◽  
Acid Buffering ◽  
Before And After ◽  
Calcium Polysulfide ◽  
Better Than

Ferrous sulfate (FeSO4) and calcium polysulfide (CaS5) stabilization are practical approaches to stabilizing hexavalent chromium (Cr(VI))-contaminated soil. The leachability and stability of Cr(VI) and Cr are important factors affecting the effectiveness of stabilized Cr(VI)-contaminated soil. This study compared the leachability and stability of Cr(VI) and Cr in Cr(VI)-contaminated soil stabilized by using FeSO4 and CaS5. The contaminated soil was characterized before and after stabilization, and the effectiveness of FeSO4 and CaS5 stabilization was assessed using leaching, bioaccessibility, alkaline digestion, sequential extraction, and X-ray diffraction tests. Results showed that FeSO4 and CaS5 significantly reduced the leachability and Cr(VI) content in the contaminated soil. The acid-buffering capacity and stability (leachability, bioaccessibility, speciation distribution, and mineral composition) of the Cr(VI)/Cr and Cr(VI) content of CaS5 were better than those of FeSO4. This study demonstrated that CaS5 had a better effect than FeSO4 on the stabilization of Cr(VI) in Cr(VI)-contaminated soil. The CaS5 significantly enhanced the stabilization and immobilization of Cr(VI) and reduced its leachability and toxicity.

Chemical extraction of arsenic from contaminated soil under subcritical conditions

2011 ◽  
Vol 409 (16) ◽  
pp. 3066-3072 ◽  
Author(s):  
Seok-Young Oh ◽  
Myong-Keun Yoon ◽  
Ick-Hyun Kim ◽  
Ju Yup Kim ◽  
Wookeun Bae
Keyword(s):  
Contaminated Soil ◽  
Chemical Extraction
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