感潮型重污染河道内源硫、铁与氮行为的耦合作用  

Coupling of endogenous sulfur and iron with nitrogen behavior in a heavily polluted tidal river

作　　者：关会敏 朱瑾[1,3] 何岩[1,3] 黄民生[1,3] 周焜 朱林林[1,3] GUAN Hui-min;ZHU Jin;HE Yan;HUANG Min-sheng;ZHOU Kun;ZHU Lin-lin(School of Ecological and Environmental Sciences,East China Normal University, Shanghai 200241,China;Department of Medical Laboratory,Chuxiong Medical College, Chuxiong Yunnan 675005,China;Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学生态与环境科学学院,上海200241 [2]楚雄医药高等专科学校医学检验系,云南楚雄675005 [3]华东师范大学上海市城市化生态过程与生态恢复重点实验室,上海200241

出　　处：《华东师范大学学报（自然科学版）》2018年第6期88-96,共9页Journal of East China Normal University(Natural Science)

基　　金：国家科技重大专项(2013ZX07310001;2014ZX07101012);上海市自然科学基金(16ZR1408800);上海市浦江人才计划(16PJD023)

摘　　要：为研究感潮作用对重污染河道内源硫、铁与氮变化的影响及其耦合关系,本研究以上海重污染感潮型河道为对象,通过模拟感潮型河道以探究稳定水位期泥水界面不同形态硫、铁和氮的动态变化,并借助于黑色关联度分析来解析内源硫、铁与氮行为的耦合作用.结果显示感潮模拟组上覆水NH_4^+-N削减率高达(82.2±1.92)%且TN削减率高达(86.49±2.31)%,表明感潮作用会影响泥水界面形成的好氧-缺氧-厌氧动态分布并促进硝化-反硝化耦合过程,有利于泥水界面总氮与氨氮的削减.灰色关联度分析结果显示间隙水硝态氮与还原态硫和铁的关联度最高为0.910 5和0.858 7.表明硫化物与二价铁对硝态氮的影响最为显著,推测感潮型重污染河道内源硫、铁与氮存在硫自养反硝化和铁自养反硝化的耦合作用.该研究有望为重污染感潮型河道修复与治理提供理论参考.To study the impact of tidal effects on endogenous sulfur(S),iron(Fe),and nitrogen(N),as well as their possible coupling,the present work investigated the dynamic variations of endogenous S,Fe and N using a simulated heavily polluted tidal river system.In addition,Grey relational analysis(GRA)was applied to elucidate the coupling of endogenous S,Fe and N behavior.The results showed a NH+4-N reduction rate of(82.2±1.92)%and a TN reduction rate of(86.49±2.31)%for the simulated tidal system.The simulation suggested that a tidal alternation facilitated the formation of an oxic-anoxic-anaerobic microenvironment at the sediment-overlying water interface and thus stimulated the coupled nitrification-denitrification process,which was in favor of ammonium and total nitrogen removal.Grey relational analysis(GRA)showed the highest integrated grey relational grade between nitrate and reduced sulfur(0.910 5)and nitrate and iron(0.858 7)in interstitial water.The results indicated that nitrate was most affected by reduced sulfur and iron;we postulate that endogenous sulfur and iron with nitrogen might exist by sulfur-driven autotrophic denitrification or iron-driven autotrophic denitrification.This study may provide reference for treatment and restoration of heavily polluted tidal rivers.

关 键 词：感潮型重污染河道 氮 硫 铁 耦合作用 

分 类 号：X522[环境科学与工程—环境工程]