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331.
You-Wei Cui Hong-Yu Zhang Si-Yuan Ji Zhi-Wu Wang 《Journal of Polymers and the Environment》2017,25(2):277-285
Haloferax mediterranei is an extremely halophilic archaeon that is able to synthesize polyhydroxyalkanoate (PHA) in high salt environment with low sterility demand. In this study, a mathematical model was validated and calibrated for describing the kinetic behavior of H. mediterranei at 15, 20, 25, and 35 °C in synthetic molasses wastewater. Results showed that the production of PHA by H. mediterranei, ranging from 390 to 620 mg h?1 L?1, was strongly dependent on the temperature. The specific growth rate (µ max), specific substrate utilization rate (q max), and specific decay rate (k d) of H. mediterranei increased with temperature following Arrhenius equation prediction. The estimated activation energy was 58.31, 25.59, and 22.38 kJ mol?1 for the process of cell growth, substrate utilization, and cell decay of H. mediterranei, respectively. The high temperature triggered the increased PHA storage even without nitrogen limitation. Thus, working at high temperatures seems a good strategy for improving the PHA productivity of H. mediterranei. 相似文献
332.
Zhang Cuixia Wang Cui Gao Mengdi Liu Conghu 《Environmental science and pollution research international》2023,30(9):22375-22387
Environmental Science and Pollution Research - The sustainability of industrial production systems is considered to be the key to promoting green transformation and upgrading of manufacturing... 相似文献
333.
Li Jing Sun Jingjing Wang Ruonan Cui Tiejun Tong Yindong 《Environmental science and pollution research international》2023,30(8):20121-20132
Environmental Science and Pollution Research - A variety of physical, chemical, and biological processes within the lakes relies on the surface water temperature while the spatial pattern of large... 相似文献
334.
Wu Jian Cui Chunying Mei Xiaolong Xu Qingsong Zhang Pu 《Environmental science and pollution research international》2023,30(10):25037-25049
Environmental Science and Pollution Research - At present, China’s carbon emissions rank first in the world, which not only brings huge challenges to the sustainable development of... 相似文献
335.
在我国黄土丘陵地区,每年因为高填方边坡失稳而造成的人员伤亡和财产损失数不胜数,有必要从高填方边坡的填料入手,开展高填方边坡失稳问题研究。以陕西某高填方边坡为例,将高填方边坡的碎石填料作为主要研究控制对象,取其边坡正在填筑的碎石填料,通过诸多室内试验测定物理力学参数、渗透性等,并借助FLAC 3D数值模拟计算其稳定性,先确定最优土石比,再确定在最优土石比下的优选级配。择优选择的级配相比之前的填料,力学性能更好,强度更高,隔水效果控制更明显,坡体的整体稳定性加强。从填方填料入手,能有效降低因回填材料不合理而引发的边坡失稳。 相似文献
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338.
基于成本分析的西部生态补偿法律机制研究 总被引:1,自引:0,他引:1
建立和实施西部生态补偿机制,是加强西部生态建设和强化西部生态功能专业化服务的必由之路。生态系统服务补偿理论和自然资本理论为我们分析西部生态补偿提供了新的分析范式,西部生态补偿包括国家补偿、区域和流域补偿、自力补偿三个层次。其内部的成本关系包括生态服务利用成本关系、跨区域资源调配成本关系、生态工程实施成本关系、内部补偿成本关系等,基于成本分析基础上的三层次补偿关系协同发展是完善西部生态补偿法律机制的基本内容。 相似文献
339.
Sodium 3,5,6-trichloropyridin-2-ol (STCP) is a necessary precursor compound for the production of chlorpyrifos and triclopyr, which are extensively used as pesticide and herbicide, respectively. In the process of STCP production, however, large amount of wastewater containing STCP is discharged, which causes increasingly environmental concerns. Therefore, it is of great significance to develop a rapid and effective method for the disposal of containing STCP contaminants. In this work, the thermal decomposition of STCP in sub- and supercritical water was investigated using a continuous tubular reactor. While STCP was stable below 280 °C, it could be effectively decomposed at elevated temperature. FT-IR spectra of the decomposition products indicated that the pyridine ring structure in the STCP molecule was stable even at temperatures up to 400 °C. The decomposition reaction was mainly caused by the substitution of Cl groups in the STCP molecule with OH groups, resulting in polyhydroxylated pyridines as the major decomposition product. Moreover, high pressure favored the substitution reaction. To completely decompose STCP into non-toxic or low toxic compounds, supercritical water oxidation (SCWO) was employed to evaluate the oxidation of STCP using H2O2 as an oxidant. It was found that STCP could be completely oxidized to H2O, CO2 and corresponding inorganic ammonium salts with an oxidation rate of 99%. 相似文献
340.