scholarly journals Support Tool for Identifying In Situ Remediation Technology for Sites Contaminated by Hexavalent Chromium

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1344 ◽  
Author(s):  
Gabriele Beretta ◽  
Andrea Mastorgio ◽  
Lisa Pedrali ◽  
Sabrina Saponaro ◽  
Elena Sezenna
Keyword(s):  
Hexavalent Chromium ◽  
Environmental Sustainability ◽  
In Situ Remediation ◽  
Support Tool ◽  
Treatment Technologies ◽  
Good Potential ◽  
Wide Scale ◽  
Preliminary Phase ◽  
Pilot Tests

Sites contaminated by hexavalent chromium raise concerns relating to the toxicity of the pollutant, as well as for the increased solubility of its compounds, which helps it to seep into aquifers. Chemical and biological in situ treatment technologies, with good potential in terms of environmental sustainability, have recently been designed and implemented on a wide scale. A useful support tool is shown in the manuscript in the preliminary phase of assessing possible technologies applicable according to the site-specific characteristics of sites. The actual efficacy of the technologies identified should nevertheless be verified in laboratory trials and pilot tests.

Combined nano-biotechnology for in-situ remediation of mixed contamination of groundwater by hexavalent chromium and chlorinated solvents

2016 ◽  
Vol 563-564 ◽  
pp. 822-834 ◽  
Author(s):  
Jan Němeček ◽  
Petr Pokorný ◽  
Ondřej Lhotský ◽  
Vladislav Knytl ◽  
Petra Najmanová ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Chlorinated Solvents ◽  
In Situ Remediation ◽  
Mixed Contamination

scholarly journals In situ remediation of hexavalent chromium contaminated soil by CMC-stabilized nanoscale zero-valent iron composited with biochar

2018 ◽  
Vol 77 (6) ◽  
pp. 1622-1631 ◽  
Author(s):  
Runyuan Zhang ◽  
Nuanqin Zhang ◽  
Zhanqiang Fang
Keyword(s):  
Hexavalent Chromium ◽  
Contaminated Soil ◽  
Extraction Procedure ◽  
Zero Valent Iron ◽  
In Situ Remediation ◽  
Natural Conditions ◽  
Untreated Soil ◽  
Nanoscale Zero Valent Iron ◽  
Mn Oxides

Abstract In this study, the remediation experiments were performed outdoors in natural conditions. Carboxymethyl cellulose (CMC)-stabilized nanoscale zero-valent iron (CMC-nZVI), biochar (BC) and CMC-stabilized nanoscale zero-valent iron composited with biochar (CMC-nZVI/BC) were synthesized and investigated for their effect on the in situ remediation of hexavalent chromium [Cr(VI)] contaminated soil and the concentration of available iron was tested after the remediation, compared with the untreated soil. The results of toxicity characteristic leaching procedure (TCLP) test showed that CMC-nZVI and CMC-nZVI/BC used as remediation materials could obviously improve the remediation rate of Cr contaminated soil and when the ratio of CMC-nZVI to Fe0 was 2.5 g/Kg, the leachability of Cr(VI) and Crtotal can be reduced by 100% and 95.8% simultaneously. Moreover, sequential extraction procedure (SEP) showed that most exchangeable Cr converted to carbonate-bound and Fe-Mn oxides-bound, reducing the availability and leachability of Cr in the soil.

Development of Simulators for In Situ Remediation Evaluation, Design, and Operation

2001 ◽  
Author(s):  
Mark S. Dortch ◽  
Christian J. McGrath ◽  
John J. Nitao ◽  
Mark A. Widdowson ◽  
Steve Yabusaki
Keyword(s):  
In Situ Remediation ◽  
Evaluation Design
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