Thermogravimetric and kinetic analysis of thermal decomposition characteristics of microbial calcites induced by cyanobacteria Synechocystis sp PCC6803

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Thermogravimetric and kinetic analysis of thermal decomposition characteristics of microbial calcites induced by cyanobacteria Synechocystis sp PCC6803
	Han, Zuozhen 1,2; Zhuang, Dingxiang 1,2,3; Yan, Huaxiao 1,3; Zhao, Hui 1,3; Sun, Bin 1,3; Li, Dan 1,3; Sun, Yanwei 3; Hu, Wenya 3; Xuan, Qize 3; Chen, Jiaoan 3
刊名	JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
	2017-02-01
卷号	127 期号:2 页码:1371-1379
关键词	Thermal decomposition Calcium carbonate Microbial calcite TG-DTG-DSC Kinetics Synechocystis sp PCC6803
英文摘要	Although various complicated methods have always been made attempts, it is still well difficult to efficiently distinguish between the biogenic and abiogenic minerals in geological area up to now. In present study, the thermal decomposition unique characteristics of microbial calcites (MC), induced by cyanobacteria Synechocystis sp. PCC6803, were compared with those of chemical calcites (CC) prepared by the reaction of sodium carbonate (Na2CO3) with calcium chloride (CaCl2). Two samples were firstly analyzed by scanning electron microscope and X-ray diffraction, and were further investigated thermal decomposition behaviors using a thermogravimetric analyzer at different heating rates of 278.15, 283.15, 293.15, and 303.15 K min(-1) from 323.15 to 1273.15 K, respectively, then kinetic parameters were calculated via Popescu, Kissinger-Akahira-Sunose, and Flynn-Wall-Ozawa methods, and then the kinetics mechanism functions were deduced by Popescu method. The results showed that these two kinds of precipitates were actually both calcite crystals although the surface morphologies were quite different. Whereas thermal decomposition kinetics mechanism function of MC can be described as Avrami-Erofeev equation ([-ln(1 - alpha)](1/3)), while CC corresponded to Contracting sphere (volume) ([1 - (1 - alpha)](1/3)), the results also showed that the average activation energy of MC and CC was 217.9 and 170.5 kJ mol(-1), respectively; that is, MC has higher thermal stability, which should be originated from the inducing effects and the different precipitation conditions provided by Synechocystis sp. PCC6803. These above results provided useful information not only for efficiently distinguishing between the biogenic and abiogenic minerals in geological area, and also for better understanding the microbial mineralization.
收录类别	SCI
语种	英语
WOS记录号	WOS:000394142200026
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/136784]
专题	海洋研究所_海洋地质与环境重点实验室
作者单位	1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 3.Shandong Univ Sci & Technol, Dept Bioengn, Coll Chem & Environm Engn, Bioresources Lab, Qingdao 266590, Peoples R China
推荐引用方式 GB/T 7714	Han, Zuozhen,Zhuang, Dingxiang,Yan, Huaxiao,et al. Thermogravimetric and kinetic analysis of thermal decomposition characteristics of microbial calcites induced by cyanobacteria Synechocystis sp PCC6803[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2017,127(2):1371-1379.
APA	Han, Zuozhen.,Zhuang, Dingxiang.,Yan, Huaxiao.,Zhao, Hui.,Sun, Bin.,...&Xiu, Yang.(2017).Thermogravimetric and kinetic analysis of thermal decomposition characteristics of microbial calcites induced by cyanobacteria Synechocystis sp PCC6803.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,127(2),1371-1379.
MLA	Han, Zuozhen,et al."Thermogravimetric and kinetic analysis of thermal decomposition characteristics of microbial calcites induced by cyanobacteria Synechocystis sp PCC6803".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 127.2(2017):1371-1379.