Yao Linjun, Naeth M Anne, Jobson Allen
Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2H1, Canada; School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China.
Department of Renewable Resources, University of Alberta, Edmonton, Alberta T6G 2H1, Canada.
J Environ Sci (China). 2015 Mar 1;29:189-98. doi: 10.1016/j.jes.2014.10.007. Epub 2015 Feb 3.
Potassium silicate drilling fluids (PSDF) are a waste product of the oil and gas industry with potential for use in land reclamation. Few studies have examined the influence of PSDF on abundance and composition of soil bacteria and fungi. Soils from three representative locations for PSDF application in Alberta, Canada, with clay loam, loam and sand textures were studied with applications of unused, used once and used twice PSDF. For all three soils, applying ≥40 m3/ha of used PSDF significantly affected the existing soil microbial flora. No microbiota was detected in unused PSDF without soil. Adding used PSDF to soil significantly increased total fungal and aerobic bacterial colony forming units in dilution plate counts, and anaerobic denitrifying bacteria numbers in serial growth experiments. Used PSDF altered bacterial and fungal colony forming unit ratios of all three soils.
硅酸钾钻井液（PSDF）是石油和天然气行业的一种废弃物，具有用于土地复垦的潜力。很少有研究考察过PSDF对土壤细菌和真菌数量及组成的影响。在加拿大艾伯塔省三个具有代表性的PSDF应用地点采集了质地分别为粘壤土、壤土和砂土的土壤，研究了未使用过的、使用过一次的和使用过两次的PSDF的施用情况。对于所有这三种土壤，施用≥40立方米/公顷的用过的PSDF显著影响了现有的土壤微生物群落。在没有土壤的未使用过的PSDF中未检测到微生物群。向土壤中添加用过的PSDF显著增加了稀释平板计数中的总真菌和好氧细菌菌落形成单位，以及连续生长实验中的厌氧反硝化细菌数量。用过的PSDF改变了所有三种土壤的细菌和真菌菌落形成单位比例。
