Reductive Anaerobic Biological In-Situ Treatment Technology (RABITT) Treatability Test

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.

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The State of Permanganate With Relation to In Situ Chemical Oxidation

11th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B ◽

10.1115/icem2007-7002 ◽

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.

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Bioremediation of Oil Contaminated Soil and Water

Handbook of Research on Uncovering New Methods for Ecosystem Management through Bioremediation - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-4666-8682-3.ch010 ◽

2015 ◽

pp. 222-254 ◽

Cited By ~ 2

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.

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In-Situ Groundwater Treatment Technology Using Biodegradation

10.21236/ada244079 ◽

1987 ◽

Cited By ~ 1

Author(s):

Edward J. Bouwer ◽

Gordon D. Cobb

Keyword(s):

Groundwater Treatment ◽

Treatment Technology

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Multifunctional bioactive Nd-Ca-Si glasses for fluorescence thermometry, photothermal therapy, and burn tissue repair

Science Advances ◽

10.1126/sciadv.abb1311 ◽

2020 ◽

Vol 6 (32) ◽

pp. eabb1311

Author(s):

Lingling Ma ◽

Yanling Zhou ◽

Zhaowenbin Zhang ◽

Yaqin Liu ◽

Dong Zhai ◽

...

Keyword(s):

Photothermal Therapy ◽

Treatment Temperature ◽

Temperature Monitoring ◽

Tumor Treatment ◽

Treatment Technology ◽

Excessive Heat ◽

Normal Tissues ◽

Normal Tissue Damage ◽

Photothermal Property

Photothermal therapy (PTT), an emerging tumor treatment technology, has attracted tremendous interest, but excessive heat will cause damage to surrounding healthy tissues. Therefore, in situ temperature monitoring during PTT is of great importance to determine optimal treatment temperature and repair heat-damaged normal tissues. Here, we report the preparation of multifunctional Nd-Ca-Si silicate glasses and glass/alginate composite hydrogels that not only have photothermal property but also emit fluorescence under 808-nm laser irradiation, and its fluorescence intensity is linearly correlated with in situ temperature. With this feature, optimal PTT temperature for effective tumor treatment with minimal normal tissue damage can be obtained. In addition, because of the bioactive silicate components, the composite hydrogel has bioactivity to repair heat damage caused by PTT. This implantable multifunctional material with unique temperature monitoring, photothermal function, and wound healing bioactivity can be used for localized thermal therapy.

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