The effect of temperature on rates of sulfate reduction in marine sediments
The effect of temperature on rates of sulfate reduction in marine sediments
复制标题
温度对海洋沉积物中硫酸盐还原速率的影响
DOI：
10.1080/01490458809377828
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发表时间：
1988
影响因子：
2.3
通讯作者：
R. Berner
中科院分区：
文献类型：
--
作者：
J. Westrich;R. Berner
用~(35)S放射性示踪法测定了长岛海湾沉积物中硫酸盐还原速率随温度的变化规律。温度依赖性是通过跟踪完整岩心的速率随温度的季节性变化而变化，或通过在受控温度下对均化沉积物进行实验室实验来衡量的。在恒温条件下，观察到了较大范围的硫酸盐还原速率。在完整的岩心和实验室实验中，硫酸盐还原速率较低的沉积物表现出更明显的温度依赖性。用Arrhenius方程测定的表观活化能随温度归一化后硫酸盐还原速率呈系统变化趋势。随着硫酸盐还原速率的降低，表观活化能从36kJ/mole增加到132kJ/mole。尽管这一观察结果可以用多种方式来解释，但有人认为，有机质对环境的敏感性是不同的。
Abstract Rates of sulfate reduction in sediments of Long Island Sound have been determined, as a function of temperature, via the 35S radiotracer method. Temperature dependence was measured either by following changes in rates in intact cores with seasonal changes in temperature, or by conducting laboratory experiments on homogenized sediments under controlled temperatures. At constant temperature, a large range of sulfate reduction rates were observed for the study sites. In both the intact cores and the laboratory experiments, sediments with lower rates of sulfate reduction exhibited a more pronounced temperature dependence. Apparent activation energies determined using the Arrhenius equation show a systematic trend with sulfate reduction rate when temperature was normalized. As the rate of sulfate reduction decreased, the apparent activation energy increased from 36 to 132 kJ/mole. Although this observation can be interpreted in a number of ways, it is suggested that susceptibility of organic matter to...