Editor’s Perspective-Soil Mixing Gains Popularity as an In Situ Treatment Technology

2013 ◽  
Vol 23 (2) ◽  
pp. 1-4
Author(s):  
John A. Simon
Keyword(s):  
Treatment Technology ◽  
Soil Mixing

In situ electrochemical and photo-electrochemical generation of the fenton reagent: A potentially important new water treatment technology

2006 ◽  
Vol 40 (9) ◽  
pp. 1754-1762 ◽  
Author(s):  
J.M. Peralta-Hernández ◽  
Yunny Meas-Vong ◽  
Francisco J. Rodríguez ◽  
Thomas W. Chapman ◽  
Manuel I. Maldonado ◽  
...  
Keyword(s):  
Water Treatment ◽  
Fenton Reagent ◽  
Treatment Technology ◽  
Electrochemical Generation ◽  
Water Treatment Technology

In situ treatment technology

1997 ◽  
Vol 34 (07) ◽  
pp. 34-3884-34-3884
Keyword(s):  
Treatment Technology

A contribution to solve the arsenic problem in groundwater of Ganges Delta by in-situ treatment

2008 ◽  
Vol 58 (10) ◽  
pp. 2009-2015 ◽  
Author(s):  
U. Rott ◽  
H. Kauffmann
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Treatment Plant ◽  
Cost Effective ◽  
Treatment Technology ◽  
Manganese Removal ◽  
Arsenic In Groundwater ◽  
Cost Effective Treatment ◽  
Removal Of Arsenic

Arsenic in groundwater is a huge problem in numerous regions of the world. Many people are exposed to high arsenic concentrations and consequently risk getting ill or even die as a result of arsenic poisoning. There are several efficient technologies for the removal of arsenic but often these methods have disadvantages, e.g. high costs for installation and/or operation, the need for chemicals or the production of arsenic contaminated filter sludge. These disadvantages can make the application difficult, especially in poor regions. Under suitable ancillary conditions the subterranean (in-situ) treatment, which is often used for iron and manganese removal from groundwater, can also be applied for the removal of arsenic and can be a cost-effective treatment technology. A field trial was carried out with a low-cost in-situ treatment plant in West Bengal/India which is described in this paper, in order to investigate whether this treatment technology is also applicable under the boundary conditions there. As for the in-situ treatment technology besides oxygen no additives are required and no arsenic contaminated filter sludge is produced this technology could be a suitable method for arsenic removal especially in poor regions.

The State of Permanganate With Relation to In Situ Chemical Oxidation

2007 ◽  
Author(s):  
Brenda Veronda ◽  
Matthew Dingens
Keyword(s):  
Reaction Rate ◽  
Chemical Oxidation ◽  
Ease Of Use ◽  
Treatment Technology ◽  
Site Specific ◽  
In Situ Chemical Oxidation ◽  
Effective Technology ◽  
Site Evaluation ◽  
Specific Factors

In Situ Chemical Oxidation (ISCO) with permanganate had its beginnings over 10 years ago. Since that time, many sites have been successfully treated for organic compounds including chlorinated ethenes (perchloroethylene, trichloroethylene, etc.) phenols, explosives such as RDX, and many other organics. The successful application of ISCO with permanganate requires the integration of many site-specific factors into the remedial design. ISCO with permanganate is an effective technology, not only for its oxidative properties and persistence, but also for its application flexibility to remediate soil and groundwater. The merits of any type of treatment technology can be assessed in terms of effectiveness, ease of use, reaction rate, and cost. The use of permanganate for in-situ chemical oxidation results in the complete mineralization of TCE and PCE and can result in treatment levels below detection limits. Permanganate is a single component oxidizer, which is easily handled, mixed and distributed to the subsurface. Permanganate is also inexpensive to design and implement as compared to other technologies. This presentation will provide a general overview of the application and safety aspects of ISCO with permanganate. This paper will discuss the advantages and limitations of this technology, typical cost ranges, site evaluation and application technologies.

Bioremediation of Oil Contaminated Soil and Water

2015 ◽  
pp. 222-254 ◽  
Author(s):  
Chandrika Malkanthi Nanayakkara ◽  
Ayoma Witharana
Keyword(s):  
Oil Pollution ◽  
Cost Effective ◽  
Ex Situ ◽  
Animal Origin ◽  
Future Research ◽  
Treatment Technology ◽  
Polluted Sites ◽  
Degradation Activity ◽  
Promising Treatment

Pollution from petroleum, plant and animal origin oils, which are released via oil production and shipping operations, refineries, accidental spills, effluents of different industries such as hotels, restaurants, food processing, etc. is ubiquitous in the environment. This necessitates the need for cost effective and efficient remediation technologies. Dealing with the problem chemically and physically is known to generate secondary pollutants and incurs high cost. Expediting natural attenuation via stimulating pollutant degradation activity of residential microbial community and/or introducing competent microflora in to polluted sites has been identified as the most successful and cost effective technology and is termed bioremediation. Phytoremediation, an emerging branch of bioremediation, has also been recognized as a promising treatment technology. Chapter examines the extent of work carried out in in situ and ex situ bioremediation strategies to mitigate oil pollution, the validity of such practices in terms of efficiency of the process and the future research directives.

Complex soil mass redistribution along a catena using meteoric and in-situ 10Be as tracers

2020 ◽  
Author(s):  
Francesca Calitri ◽  
Markus Egli ◽  
Michael Sommer ◽  
Dmitry Tikhomirov ◽  
Marcus Christl
Keyword(s):  
Explanatory Power ◽  
Soil Mass ◽  
Soil Horizon ◽  
Ground Moraine ◽  
Buried Soils ◽  
Soil Mixing ◽  
Mass Redistribution ◽  
Buried Soil ◽  
Shallow Soils

<p><span>In hilly and mountainous landscapes, the bedrock is actively converted to a continuous soil mantle. The bedrock-soil interface lowers spatially at the soil production rate, and the soil acts as a layer removing sediment produced locally and transported from upslope. Forested soils of a hummocky ground moraine landscape in Northern Germany exhibit strongly varying soil thicknesses with very shallow soils on crest positions and buried soils at the footslope. We explored the explanatory power of both <sup>10</sup>Be forms (in situ and meteoric) for forest soils on a hillslope to shed light into the </span><span>complex mass redistribution. </span><span>Our main research questions were: how do meteoric and in-situ <sup>10</sup>Be compare to each other? What do they really indicate in terms of soil processes (erosion, sedimentation, reworking)? </span><span>By using both types of <sup>10</sup>Be, the dynamics of soils and related mass transports should be better traceable</span><span>. Both <sup>10</sup>Be forms were measured along three profiles at different slope positions: Hydro1 (summit), Hydro3 (shoulder), Hydro4 (backslope). Furthermore, a buried horizon was found in the profile Hydro4 at 160 cm depth and <sup>14</sup>C-dated. The distribution pattern of meteoric <sup>10</sup>Be of Hydro4 shows an inverse exponential depth profile, and an almost uniform content of in-situ <sup>10</sup>Be along the profile. Meteoric <sup>10</sup>Be indicates on the one hand that a new soil was put on top of an older, now buried soil. On the other hand, meteoric <sup>10</sup>Be is involved in pedogenetic processes and clearly exhibits clay eluviation in the topsoil and clay illuviation in the subsoil. The uniform content of the in situ <sup>10</sup>Be shows soil mixing that must have occurred during erosion and sedimentation. The<sup>14</sup>C dated buried soil horizon indicates a deposition of eroded soil material about 7 ka BP. Consequently, an increase in the in-situ <sup>10</sup>Be content towards the surface should be expect which however was not the case. The reason for this is so far unknown. Radiocarbon dating and <sup>10</sup>Be data demonstrate that strong events of soil mass redistribution in Melzower Forest are mainly a result of ancient natural events. Further measurements of fallout radionuclides (<sup>239+240</sup>Pu) showed no erosion for the last few decades in the same catchment.</span></p>

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