李玉嵩, 赵丽, 张攀群,等.天然有机质在低温孔隙地热水中的迁移转化研究[J].河南理工大学学报（自然科学版）,2022,41(2):77-84.

LI Y S, ZHAO L, ZHANG P Q, et al. Study on the migration and transformation regularity of natural organic matter in the low-temperature pore geothermal water[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(2):77-84.

天然有机质在低温孔隙地热水中的迁移转化研究

李玉嵩1,2, 赵丽3,4,5, 张攀群3,4,5, 赵豫3,4,5, 王心义3,4,5,6, 李娅琪3,4,5, 孔茂然3,4,5

1.河南省地质矿产勘查开发局 第二地质环境调查院,河南 郑州 450000；2.河南省自然资源科技创新中心,河南 郑州 450000；3.河南理工大学 河南省煤炭绿色转化重点实验室,河南 焦作 454000；4.陕西省煤矿水害防治技术重点实验室,陕西 西安 710077；5.河南理工大学 资源环境学院,河南 焦作 454000；6.中原经济区煤层（页岩）气河南省协同创新中心,河南 焦作 454000

摘要:为了研究天然有机质（natural organic matter,NOM ）在低温孔隙地热水中的迁移转化规律,探索研究区地热水中的碳循环,以新近系明化镇组热储层地表出露处的扰动土为岩土介质,以该区域广泛种植毛白杨的落叶为研究对象,从中提取水溶性NOM和天然有机质NOM,在40 ℃、达西流速0.59~0.60 cm/h下,进行柱模拟试验,结果表明：0~820 h,NOM在模拟的孔隙型热储层的运移过程中存在生物降解和吸附作用,可生成含有羰基、羧基、羟基和酯类的芳香族有机物,且溶解性有机碳（dissolved organic carbon ,DOC ）和波长254 nm单位比色皿光程下的紫外吸光度（UV₂₅₄）具有较显著的线性相关性（r² = 0.81）；820 ~1 180 h,随着注入的 NOM质量浓度减半,DOC去除率可有效提高到100% ；1 180 ~1 828 h,向模拟柱中注入去离子水,DOC与UV₂₅₄的变化表明,NOM在水-岩间可通过较强的生物降解作用去除,且NOM中芳香族化合物在岩土上具有吸附作用,研究结果也可由单位DOC浓度在波长254 nm处的吸收系数（SUVA₂₅₄）和样品在253,203 nm处吸光度比值（A₂₅₃/A₂₀₃）的变化规律得以证实。同时,NOM可提供有效的“碳源”,促使水-岩间硝酸盐的完全生物转化。

关键词:天然有机质;孔隙地热水;溶解性有机碳;吸附;生物降解

doi:10.16186/j.cnki.1673-9787.2020080093

基金项目:国家自然科学基金资助项目（41972175）；河南省科技攻关计划项目（212102310502）；河南省煤炭绿色转化重点实验室开放基金资助项目（CGCF202005）；陕西省煤矿水害防治技术重点实验室开放基金资助项目（CCTEGXA/KY-2021-8 ）

收稿日期:2020/08/31

修回日期:2020/11/27

出版日期:2022/03/15

Study on the migration and transformation regularity of natural organic matter in the low-temperature pore geothermal water

LI Yusong1,2, ZHAO Li3,4,5, ZHANG Panqun3,4,5, ZHAO Yu3,4,5, WANG Xinyi3,4,5,6, LI Yaqi3,4,5, KONG Maoran3,4,5

1.No. 2 Institute of Geo-environment Survey,Bureau of Geology and Mineral Exploration and Developlment of Henan Provinve,Zhengzhou  450000 ,Henan ,China；2.Henan Seienee and Teehnology Innovation Center of Natural Resourees ,Zhengzhou  450000 ,Henan,China；3.Henan Key Laboratory of Coal Green Conversion,Henan Polyteehnie University,Jiaozuo  454000 ,Henan,China；4.Shaanxi Key Laboratory of Prevention and Control Teehnology for Coal Mine Water Hazard ,Xian  710077 ,Shaanxi,China；5.Institute of Resourees & Environment,Henan Polyteehnie University,Jiaozuo  454000 ,Henan,China；6.Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Eeonomie Region,Jiaozuo  454000 ,Henan,China

Abstract: Taking the disturbed soil of Minghuazhen Formation thermal reservoir in Neogene Period bared from the land surface as the packed matrix,and taking the natural organic matter( NOM) extracted from the leaf litter of Populus tomentosa as the research object,the migration and transformation laws of NOM in the low-temperature pore geothermal water were studied through column experiments with a Darcy flux between 0.59 and 0.6 cm /h at 40 ℃ .The results showed that the biodegradation of NOM and its adsorption onto the packed matrix occurred during its transport through the studied matrix between 0 and 820 h.The studied NOM could be transformed to the aromatic organic compounds containing carbonyl,carboxyl,hydroxyl and esters during the test duration.Additionally,there was a significant linear correlation between DOC and UV₂₅₄ ( r₂ = 0.81) .Thereafter,with the decrease of NOM concentration by half in the input solution,the removal efficiency of DOC amounted to nearly 100% between 820 and 1 180 h.When the deionized water was injected into the packed column between 1 180 and 1 828 h,the studied NOM could be removed through strong biodegradation indicated by the variations of DOC and UV₂₅₄ .Moreover,the aromatic compounds in the NOM could be adsorbed by the packed matrix.The above results could be confirmed by the variation patterns of SUVA₂₅₄ and A₂₅₃ /A₂₀₃ .Furthermore,the studied NOM could provide effective carbon sources to promote the complete biotransformation of nitrate between the water and rock.

Key words:natural organic matter;poregeo thermal water;dissolved organic carbon;adsorption;biodegradation

 天然有机质在低温孔隙地热水中的迁移转化研究_李玉嵩.pdf