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| 石膏在有机物厌氧分解中的固碳效应 | |
| 引用本文： | 何光亚,陈天虎,黎少杰,张楠,归显扬,姚敦璠,刘畅.石膏在有机物厌氧分解中的固碳效应[J].高校地质学报,2011,17(1):86-92. |
| 作者姓名： | 何光亚 陈天虎 黎少杰 张楠 归显扬 姚敦璠 刘畅 |
| 作者单位： | 合肥工业大学 资源与环境工程学院 |
| 基金项目： | 国家重点基础研究发展规划(973)项目 |
| 摘 要： | 本文以牛肉膏蛋白胨为厌氧微生物的营养源,研究了石膏对厌氧微生物生化系统中甲烷释放量和有机物矿化的影响.根据溶液中总有机碳(TOC)、总无机碳(TIC)、硫酸根、硫化物、pH值以及气体中CO2,CH4和H2S的释放量的观测,以及固体产物的扫描电镜(SEM)、能谱(EDS)、X-射线衍射(XRD)分析结果,探讨了石膏对抑制... |
| 关 键 词： | 石膏 硫酸盐还原菌 产甲烷菌 甲烷 固碳 |
| 修稿时间： | 2011-02-16 |
Effect of Gypsum on Carbon Sequestration of Organic Matter in Anaerobic Decomposition |
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| HE Guang-ya,CHEN Tian-hu,LI Shao-jie,ZHANG Nan,GUI Xian-yang,YAO Dun-fan,LIU Chang.Effect of Gypsum on Carbon Sequestration of Organic Matter in Anaerobic Decomposition[J].Geological Journal of China Universities,2011,17(1):86-92. | |
| Authors: | HE Guang-ya CHEN Tian-hu LI Shao-jie ZHANG Nan GUI Xian-yang YAO Dun-fan LIU Chang |
| Institution: | School of Resource and Environment, Hefei University of Technology |
| Abstract: | This paper investigated the affect of gypsum on methane emission and organic matter mineralization in anaerobic biochemical system by using beef extract peptone as the nutrient source. To explore the effect and mechanism of gypsum on suppressing the activity of methane-producing bacteria (MPB), three kinds of chemical and physical indexes were tested: 1) TOC, TIC, SO42-, sulfide and pH values of the aqueous phase; 2) volume of CO2, CH4 and H2S emissions in the gas phase, and 3) SEM, EDS and XRD analyses of the solid phase. Our results showed that addition of gypsum could effectively reduce methane emission by more than 40 %. However, no apparent impact on the release of CO2 was observed during this process. Furthermore, the content of carbonate minerals in solid phase increased dramatically compared with the control group. These data further suggested that the major role of gypsum in this anaerobic system is represented in the following aspects: 1) the continuous dissolution of gypsum, one of the slightly soluble minerals, played an important role in controlled release of SO42-during its sustained reduction; 2) sulfate-reducing bacteria (SRB) were promoted to be the dominant microorganism under the conditions of stable SO42-concentration and sufficient electron acceptors generated by slow dissolution of gypsum, and its competition of substrates and electrons further suppressed the methane production of MPB; 3) the consumption of organic carbon by SRB accelerated mineralization of organic matter, by which the carbonate generated could combine with Ca2+in gypsum to form CaCO3. In this way, gypsum plays a crucial role in carbon sequestration by efficiently improving the rate of organic carbon mineralization. |
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