不同储存容器、保存时间和软件计算方法对水体二氧化碳分压测算值的影响研究  

Effects of Storage Container,Storage Time,and Calculation Software on the Measurement of Carbon Dioxide Partial Pressure in Water

作　　者：凌嘉茵 郑辉 黄梓棋 邵李文 曾煌达 Ling Jiayin;Zheng Hui;Huang Ziqi;Shao Liwen;Zeng Huangda(Guangdong Provincial Key Laboratory of Environmental Health and Land Resource,Guangdong Technology and Equipment Research Center for Soil and Water Pollution Control,Zhaoqing University,Zhaoqing 526061;School of Environmental and Chemical Engineering,Zhaoqing University,Zhaoqing,526061;Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center,Guangzhou 510006,China)

机构地区：[1]肇庆学院广东省环境健康与资源利用重点实验室、广东省水土污染管控及装备智能制造工程技术研究中心,广东肇庆526061 [2]肇庆学院环境与化学工程学院,广东肇庆526061 [3]广东省广州生态环境监测中心站,广东广州510006

出　　处：《广东化工》2024年第2期1-5,共5页Guangdong Chemical Industry

基　　金：广东省环境健康与资源利用重点实验室项目(2020B121201014)。

摘　　要：本文探讨了使用不同储存容器(玻璃溶解氧瓶和高密度聚乙烯(HDPE)瓶)、保存时间及计算软件(CO_(2)SYS和PHREEQC)对水体二氧化碳分压p(CO_(2))和通量F(CO_(2))测算值的影响。结果表明:溶解氧瓶和HDPE瓶,两者差异不显著(p>0.05)。样品只要经过0.45μm微孔滤膜过滤、冷藏(4℃)并在24 h内进行测定,保存时间对结果影响不显著(p>0.05)。CO_(2)SYS的p(CO_(2))计算值约为PHREEQC的30%左右,差异显著(p<0.05)。可能原因是PHREEQC有考虑岩溶作用,而CO_(2)SYS没有。但在研究水质参数(COD、总氮、硝酸盐氮、氨氮、总磷、叶绿素、溶解氧(DO)和碳酸盐矿物饱和指数等)与水体p(CO_(2))和F(CO_(2))的关系和影响时,两个软件得出的规律是一致的。This study explores the effects of different storage containers(glass dissolved oxygen bottles and high density polyethylene(HDPE)bottles),storage time,and calculation software programs(CO_(2)SYS and PHREEQC)on the analysis of CO_(2)partial pressure(p(CO_(2)))and CO_(2)flux(F(CO_(2)))of water.The results showed that no significant difference(p>0.05)in the p(CO_(2))and F(CO_(2))results was observed between glass dissolved oxygen bottles and HDPE bottles.The storage time showed no significant impact(p>0.05)on the measurements of p(CO_(2))and F(CO_(2)),as long as the samples were pass through 0.45μm microporous filter,kept at(4℃),and measured within 24 hours.The calculated p(CO_(2))values by CO_(2)SYS were approximately only 30%of those by PHREEQC,with a significant difference(p<0.05).The possible reason could be that PHREEQC considers karstification,while CO_(2)SYS did not.However,in the assessments of the effects of water characteristics(chemical oxygen demand(COD),total nitrogen,nitrate nitrogen,ammonia nitrogen,total phosphorus,total chlorophyll,dissolved oxygen(DO),and carbonate mineral saturation index)on the p(CO_(2))and F(CO_(2))of water,the patterns obtained by the two software programs were consistent.

关 键 词：二氧化碳分压 储存容器 保存时间 CO_(2)SYS软件 PHREEQC软件 

分 类 号：TQ[化学工程]