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Intensified, High-Rate Reductive Immobilization of Hexavalent Chromium

Award Number: R43ES031495
ORGANIZATION: NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 08/10/2020
PERIOD OF PERFORMANCE END DATE: 07/31/2021

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Intensified, High-Rate Reductive Immobilization of Hexavalent Chromium - Project Summary / Abstract Hexavalent chromium, or Cr(VI), is among the most widespread contaminants in water resources in the U.S. and around the world. Cr(VI) has been found in at least 1,127 of the 1,699 current or former National Priority List (NPL) sites, which have been identified by the U.S. Environmental Protection Agency (EPA) as the most serious hazardous waste sites in the nation and are the highest priority targets for long-term federal cleanup activities. Toxicological research has found that high concentrations of Cr(VI) can contribute to stomach cancers, kidney and liver damage, and reproductive harm. As a result, there is significant demand among water providers and managers of Superfund sites for innovative technologies to address Cr(VI) contamination in a cost-effective and environmentally sustainable manner. The lack of cost-effective technologies to reduce Cr(VI) levels in water are due to technical challenges associated with existing physical/chemical approaches, including high cost, the need for disposal of secondary waste streams, and performance that can be vulnerable to influent water geochemistry. Specifically, there is a need for new technologies to reliably reduce Cr(VI) to very low parts-per-billion levels with lower costs and less waste than existing physical or chemical treatment technologies. This project seeks to address this need through a novel combination of materials science and bacterial reductive immobilization. In contrast to conventional physical or chemical technologies, this new technology does not produce a hazardous secondary waste stream. Moreover, the proposed technology offers unique redox flexibility, which allows it to remain effective even while hydrogeological characteristics may change. These and other advantages help position the proposed technology as a highly effective ex-situ or in-situ treatment approach to achieve low concentrations of Cr(VI) in water. In the proposed project, a prototype of the proposed technology is developed through comprehensive kinetic studies under various operating conditions supported by whole-genome transcriptional studies. In addition to developing optimum parameters for the treatment system, the project will also provide insights into the unique physiology employed to achieve reductive immobilization of Cr(VI). Development of material composites to deploy a high density of the targeted culture proceeds in an iterative manner to ultimately select one composite to evaluate in a continuous-flow reactor study using both synthetic and actual contaminated groundwater. The outcome of this project will be the proof-of-concept of a new technology for efficient, environmentally friendly, and cost-effective Cr(VI) treatment. As a result, this project holds significant promise to provide a critically necessary tool for protecting and remediating drinking water supplies from chromium contamination, thus promoting public safety and environmental health.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2021 ( Subtotal = $0 )
2021	2020	MICROVI BIOTECH, INC.	26229 EDEN LANDING RD STE 1	HAYWARD	CA	94545	ALAMEDA	USA	Environmental Health	000	1	8/21/2021	NEW	$0
														Subtotal = $0

Issue Date FY: 2020 ( Subtotal = $174,587 )
2020	2020	MICROVI BIOTECH, INC.	26229 EDEN LANDING RD STE 1	HAYWARD	CA	94545	ALAMEDA	USA	Environmental Health	000	1	8/9/2020	NEW	$174,587
														Subtotal = $174,587

Grand Total All Awards = $174,587

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Intensified, High-Rate Reductive Immobilization of Hexavalent Chromium

Award Number: R43ES031495

ORGANIZATION: NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 08/10/2020

PERIOD OF PERFORMANCE END DATE: 07/31/2021

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