title: Microbial Reverse-Electrodialysis Electrolysis and Chemical-Production Cell for H2Production and CO2Sequestration.
abstract: Natural mineral carbonation can be accelerated using acid and alkali solutions to enhance atmospheric CO2sequestration, but the production of these solutions needs to be carbon-neutral. A microbial reverse-electrodialysis electrolysis and chemical-production cell (MRECC) was developed to produce these solutions and H2gas using only renewable energy sources (organic matter and salinity gradient). Using acetate (0.82 g/L) as a fuel for microorganisms to generate electricity in the anode chamber (liquid volume of 28 mL), 0.45 mmol of acid and 1.09 mmol of alkali were produced at production efficiencies of 35% and 86%, respectively, along with 10 mL of H2gas. Serpentine dissolution was enhanced 17-87-fold using the acid solution, with approximately 9 mL of CO2absorbed and 4 mg of CO2fixed as magnesium or calcium carbonates. The operational costs, based on mineral digging and grinding, and water pumping, were estimated to be only $25/metric ton of CO2fixed as insoluble carbonates. Considering the additional economic benefits of H2generation and possible wastewater treatment, this method may be a cost-effective and environmentally friendly method for CO2sequestration.
authors.affiliation: Department of Civil and Environmental Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Xiuping
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Department of Civil and Environmental Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Marta C
authors.initials: MC
authors.lastname: Hatzell
authors.affiliation: Department of Civil and Environmental Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Logan
references.citation: Science. 2000 Jul 14;289(5477):270-7
references.pmid: 10894770
references.citation: Environ Sci Technol. 2010 Dec 1;44(23):9207-12
references.pmid: 20964356
references.citation: Environ Sci Technol. 2009 May 15;43(10):3953-8
references.pmid: 19544913
references.citation: Environ Sci Technol. 2012 May 1;46(9):5240-6
references.pmid: 22463373
references.citation: Nature. 2014 Jan 23;505(7484):464
references.pmid: 24451521
references.citation: Environ Sci Technol. 2011 Jul 1;45(13):5834-9
references.pmid: 21644573
references.citation: Bioresour Technol. 2013 Jul;140:399-405
references.pmid: 23711946
references.citation: Science. 2012 Mar 23;335(6075):1474-7
references.pmid: 22383807
references.citation: Bioresour Technol. 2014 May;159:24-9
references.pmid: 24632437
references.citation: Environ Sci Technol. 2009 Sep 1;43(17):6888-94
references.pmid: 19764265
references.citation: Environ Sci Technol. 2004 May 1;38(9):160A-167A
references.pmid: 15180042
references.citation: Bioresour Technol. 2012 Jul;116:507-11
references.pmid: 22608915
references.citation: Proc Natl Acad Sci U S A. 2000 Aug 29;97(18):9875-80
references.pmid: 10944197
references.citation: Environ Sci Technol. 2012 Feb 21;46(4):2467-72
references.pmid: 22242642