Matawan, NJ, United States
Matawan, NJ, United States

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Bryant D.,Geo Cleanse International Inc. | Moody W.,Geo Cleanse International Inc. | Turkot S.,Geo Cleanse International Inc. | Maalouf G.Y.,Rogers and Callcott Engineers | And 3 more authors.
Pollution Engineering | Year: 2013

Chlorinated solvent DNAPL site remediation remains a daunting challenge that often requires the integration of multiple technologies to achieve cleanup objectives. Technologies must be adapted to variable site conditions and flexible to the evolving nature of the source and plume as the remediation progresses. The proposal was an integrated in-situ chemical oxidation using potassium permanganate in the source area, with in-situ chemical reduction using zero-valent iron (ZVI) barriers in the down gradient plume area. Reagents were injected as high-solids slurries to effectively distribute large reagent volumes within specific and focused target zones in the low-permeability saprolite and a fractured zone in bedrock. A TCE handling unit located near the southwest corner of the facility, which was in operation for about 10 years, was determined to be the primary source, with an estimated discharge of approximately 1,365 gallons of solvent.


Bryant D.A.N.,Geo Cleanse International Inc. | Moody W.,Geo Cleanse International Inc. | Turkot S.,Geo Cleanse International Inc. | Maalouf G.Y.,Rogers and Callcott Engineers | And 3 more authors.
Pollution Engineering | Year: 2013

Geo-Cleanse International Inc was contracted to design and implement a pilot test for a challenging site characterized by high source area trichloroethylene (TCE) concentrations, low permeability saprolite geology overlying highly transmissive bedrock, low natural attenuation, and a large plume area with limited accessibility. The proposal was an integrated in-situ chemical oxidation using potassium permanganate in the source area, with in-situ chemical reduction using zero-valent iron (ZVI) barriers in the downgradient plume area. The groundwater analytes in the permanganate pilot test area consisted of VOC, color, oxidation-reduction potential, specific conductivity and pH. The VOC concentrations in the groundwater downgradient from the barrier exhibited significant reductions. The TCE concentrations were reduced by 46-100% relative to the baseline concentrations in the four downgradient monitoring wells. The TCE concentrations were reduced from ≈ 35,000 to 950 μg/L and from 18 to 9.7 μg/L in the two saprolite monitoring wells. Cis-1,2-dichloroethylene, formed from ZVI degradation of TCE, initially increased following the injection. However, additional post-injection sampling showed a subsequent decrease as a function of time.


Bryant D.,Geo Cleanse International Inc.
Pollution Engineering | Year: 2014

Combined treatment technologies, in-situ chemical oxidation (ISCO) followed by anaerobic bioremediation (ABIO), are becoming more acceptable for groundwater and soil remediation. The key requirement for successful deployment of coupled technologies is careful consideration of the transient nature of the geochemical and hydrological conditions associated with each technology. Soils and aquifers have a large capacity to absorb and attenuate geochemical shifts associated with remediation. Microbial populations will re-equilibrate once treatment has ended and the geochemical shifts are attenuated. Numerous lab and field studies have shown that the geochemical shifts associated with ISCO are transient; microbial activity resumes and often exceeds pre-ISCO levels once the geochemical shifts are ameliorated by the natural capacity of the aquifer.


Bryant D.,Geo Cleanse International Inc.
Pollution Engineering | Year: 2013

The limitations of phytate as a stabilizer in soil science are discussed. Phytate is a large organic molecule structured as an aromatic ring with six molecules of H2PO4 appended to the ring. It is a naturally occurring compound that provides phosphate storage in many plants. Different studies on the use of phytate for treatment of contaminated soil show that its impact on metal solubility is complex. In some cases, phytate can increase metal solubility and in other cases decrease the solubility of the same metal, depending upon solution conditions such as the type and concentration of the metal and concentration of phytate. This may be responsible for the variable efficacy of phytate in bench tests of peroxide stabilization with different soil types. Furthermore, the concentration of certain oxyanionic metals including arsenic, selenium and chromium has been observed to increase in solution following phytate addition.


Patent
Geo Cleanse International Inc. | Date: 2013-09-18

Methods and compositions for the remediation of environmental contaminants using redox reactions are described. The redox reactions include manganese compounds and peroxide generating compounds. The methods and compositions are also useful for the remediation of highly oxidized environmental contaminants.


Patent
Geo Cleanse International Inc. | Date: 2010-02-24

Methods and compositions for the remediation of environmental contaminants using redox reactions are described. The redox reactions include manganese compounds and peroxide generating compounds. The methods and compositions are also useful for the remediation of highly oxidized environmental contaminants.

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