We then review the applications of the SCĬarbon isotopes of dissolved inorganic carbon reflect utilization of different carbon sources by microbial communities in two limestone aquifer assemblagesĭirectory of Open Access Journals (Sweden)įull Text Available Isotopes of dissolved inorganic carbon (DIC are used to indicate both transit times and biogeochemical evolution of groundwaters. This paper reviews the recent development of inorganic-nano-carbon hybrid materials for electrochemical energy storage and conversion, including the preparation and functionalization of graphene sheets and carbon nanotubes to impart oxygen containing groups and defects, and methods of synthesis of nanoparticles of various morphologies on oxidized graphene and carbon nanotubes. The interactions between inorganic precursors and oxidized- carbon substrates provide a degree of control over the morphology, size and structure of the resulting inorganic nanoparticles. Nano- carbon with various degrees of oxidation provides a novel substrate for nanoparticle nucleation and growth. The inorganic-nano-carbon hybrid materials are novel due to possible chemical bonding between inorganic nanoparticles and oxidized carbon, affording enhanced charge transport and increased rate capability of electrochemical materials without sacrificing specific capacity. We show that the inorganic-nano-carbon hybrid materials represent a new approach to synthesize electrode materials with higher electrochemical performance than traditional counterparts made by simple physical mixtures of electrochemically active inorganic particles and conducting carbon materials. In this review, we present an approach to synthesize electrochemical energy storage materials to form strongly coupled hybrids (SC-hybrids) of inorganic nanomaterials and novel graphitic nano- carbon materials such as carbon nanotubes and graphene, through nucleation and growth of nanoparticles at the functional groups of oxidized graphitic nano- carbon. In particular, the development of electric or hydrogen powered vehicles calls for much-higher-performance batteries, supercapacitors and fuel cells than are currently available. The global shift of energy production from fossil fuels to renewable energy sources requires more efficient and reliable electrochemical energy storage devices. Strongly coupled inorganic-nano-carbon hybrid materials for energy storage. ![]() Ghafari, Shahin Hasan, Masitah, E-mail: of autohydrogenotrophic denitrifying bacteria using inorganic carbon source (CO-N/L. Adapted hydrogenotrophic denitrifying bacteria, using bicarbonate and hydrogen gas in the aforementioned pH range, caused denitrification at a rate of 13.33 mg NO 3 -N/g MLVSS/h for degrading 20 and 30 mg NO 3 -N/L and 9.09 mg NO 3 -N/g MLVSS/h for degrading 50 mg NO 3 -N/LĮnergy Technology Data Exchange (ETDEWEB) As a result, bicarbonate as the only carbon source showed a faster adaptation, while carbon dioxide as the only carbon source as well as a complementary carbon source added to bicarbonate resulted in longer acclimation period. The pH-reducing nature of CO 2 showed an unfavorable impact on denitrification rate however bicarbonate resulted in a buffered environment in the mixed liquor and provided a suitable mean to maintain the pH in the desirable range of 7-8.2. Three distinct strategies in feeding of carbon sources were applied: (I) continuous sparging of CO 2, (II) bicarbonate plus continuous sparging of CO 2, and (III) only bicarbonate. In this regard, activated sludge was used as the seed source and sequencing batch reactor (SBR) technique was applied for accomplishing the acclimatization. Ghafari, Shahin Hasan, Masitah Aroua, Mohamed KheireddineĪcclimation of autohydrogenotrophic denitrifying bacteria using inorganic carbon source (CO 2 and bicarbonate) and hydrogen gas as electron donor was performed in this study. International Nuclear Information System (INIS) This paper mainly focuses on the inorganic dynamic process of soil inorganic carbon in soil environment in arid and semi-arid regions, and summarized the composition and source of soil inorganic carbon, influence factors and soil carbon sequestration.Įffect of carbon dioxide and bicarbonate as inorganic carbon sources on growth and adaptation of autohydrogenotrophic denitrifying bacteria ![]() Soil inorganic carbon is one of the main carbon banks in the near-surface environment, and is the main form of soil carbon library in arid and semi-arid regions, which plays an important role in the global carbon cycle. Review of progress in soil inorganic carbon researchīai, S.
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