近海海洋酸化对痕量元素在沉积物-海水界面处生物地球化学特性的影响研究  

Effect of offshore ocean acidification on the biogeochemical properties of trace elements at the sediment–seawater interface

作　　者：高文婧 曲宝晓 袁华茂[2,3,4] 宋金明[2,3,4] GAO Wen-jing;QU Bao-xiao;YUAN Hua-mao;SONG Jin-ming(College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;CAS Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China)

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042 [2]中国科学院海洋研究所海洋生态与环境科学重点实验室,山东青岛266071 [3]青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室,山东青岛266237 [4]中国科学院海洋大科学中心,山东青岛266071

出　　处：《海洋科学》2023年第9期119-130,共12页Marine Sciences

基　　金：青岛海洋科学与技术试点国家实验室“问海计划”项目(2021WHZZB0900);山东省自然科学基金资助项目(ZR2020YQ28);国家自然科学基金面上项目(41976037)。

摘　　要：痕量元素在海洋环境中不仅能够密切参与物质循环,显著调控生命代谢,有些情况下还会对浮游及底栖生物产生抑制和毒害,是海洋系统中具有重要生物地球化学作用的“双刃剑”。工业革命以来,海洋不断吸收大气CO_(2)使得海水pH和碳酸根浓度持续下降,在全球范围内都出现了海洋酸化的现象。海洋酸化作为新的环境胁迫打破了痕量元素在沉积物-间隙水-上覆水中既有的平衡态势,导致痕量元素在海洋环境中的生物地球化学特性变得更加复杂和不确定。本文从痕量元素在沉积物-海水体系中的赋存形态与交换过程入手,探讨了海洋酸化条件下痕量元素在沉积物-海水体系中的扩散迁移与再平衡行为,分析了由此产生的生物毒性效应和生物可用性影响。最后,对海洋酸化与多种环境条件、多种污染物联合作用所导致的与痕量元素相关的生态效应研究进行了展望,以期为未来海洋酸化与痕量元素协同研究提供有意义的科学参考。In the marine environment,trace elements play an important role in the material cycle,significantly regulate life metabolism,and inhibit and poison planktonic and benthic organisms.Therefore,they are considered a“double-edged sword”with significant biogeochemical consequences for the marine system.Since the Industrial Revolution,the oceans have undergone continuous atmospheric CO_(2) absorption,resulting in a continuous decline in seawater pH,carbonate concentration,and global ocean acidification.As a new environmental stress factor,ocean acidification has disrupted the original balance of trace elements in sediment-interstitial water-overlying water systems,making the biogeochemical behavior of marine trace elements more complex and uncertain.In this review,the occurrence form and exchange process of trace elements in the sediment-seawater system are first discussed,followed by the diffusion,migration,and rebalance behavior of trace elements under ocean acidification conditions.Further,the subsequent toxic and bioavailability effects are analyzed.Finally,research on the ecological effects of trace elements caused by the combined action of ocean acidification and various environmental conditions and pollutants is prospected.

关 键 词：痕量元素 海洋酸化 沉积物-海水界面 赋存形态 含量水平 迁移转化 生物可用性 

分 类 号：P734.41[天文地球—海洋化学]