Controlling variables for the uptake of atmospheric carbonyl sulfide by soil
Controlling variables for the uptake of atmospheric carbonyl sulfide by soil
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DOI：
10.1029/1999jd900090
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发表时间：
1999-05-20
影响因子：
4.4
通讯作者：
Kuhn, U
中科院分区：
文献类型：
--
作者：
Kesselmeier, J;Teusch, N;Kuhn, U
在人工气候室中，采用动态比色皿，研究了农田土壤样品中硫化羰（CPS）与大气的交换。调查帆型作为一个显着的汇微量气体COS。大气COS混合比，温度和土壤含水量被发现的物理化学参数控制的吸收。在代表自然环境的条件下从未观察到排放。观察到的补偿点（即，其中消耗和产生相互平衡并且净通量为零的环境浓度）为约万亿分之53。吸收速率在1.5和10.3 pmol m（-2）s（-1）之间。土壤样品对COS的消耗取决于土壤中微生物的生理活性，如明确的最适温度和在酶抑制剂6-乙氧基-2-苯并噻唑-2-磺酰胺（EZ）（碳酸酐酶的特异性抑制剂）存在下的剧烈抑制所示。
Soil samples from arable land were investigated for their exchange of carbonyl sulfide (CPS) with the atmosphere under controlled conditions using dynamic cuvettes in a climate chamber. The investigated sail type acted as a significant sink for the trace gas COS. Atmospheric COS mixing ratios, temperature, and soil water content were found to be the physicochemical parameters controlling the uptake. Emission was never observed under conditions representative Of a natural environment. The observed compensation point (i.e., an ambient concentration where the consumption and production balance each other and the net flux is zero) for the uptake was about 53 parts per trillion. Uptake rates ranged between 1.5 and 10.3 pmol m(-2) s(-1). The consumption of COS by the soil sample depended on the physiological activity of the microorganisms in the soil, as indicated by a clear optimum temperature and by a drastic inhibition in the presence of the enzyme inhibitor 6-ethoxy-2-benzothiazole-2-sulfonamide (EZ), a specific inhibitor for carbonic anhydrase.