多配体铬络合物的羊角月牙藻毒性评价与生物转化特点  

Toxicity Assessment and Biotransformation Characteristics of Multiligand Chromium Complexes Toward Selenastrum Capricornutum

作　　者：朱超 利浩男 许锦松 孔德懿 陈喆倩 马宏瑞 ZHU Chao;LI Haonan;XU Jinsong;KONG Deyi;CHEN Zheqian;MA Hongrui(School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China;School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China)

机构地区：[1]陕西科技大学环境科学与工程学院,陕西西安710021 [2]南方科技大学环境科学与工程学院,广东深圳518055

出　　处：《皮革科学与工程》2024年第5期8-14,共7页Leather Science and Engineering

基　　金：国家自然科学基金(22076113)。

摘　　要：工业废水中的优先控制污染物铬极易与各类有机分子发生络合,导致难以完全去除,潜在的环境释放量较大。选择羊角月牙藻作为模式供试生物,探究了不同多配体铬络合物对羊角月牙藻的生物学效应。结果表明,多配体铬络合物暴露会显著提升藻细胞内活性氧水平(44%~55%),诱导氧化应激反应,从而不同程度地抑制藻类生长(抑制率16%~67%),且长期暴露下会抑制羊角月牙藻可溶性蛋白质和糖类的合成,其中以明胶-没食子酸-铬络合物为代表的多配体铬络合物的藻生物毒性最大。另外,长期共培养后,羊角月牙藻体内存在一定的多配体铬络合物生物降解效应。总体而言,多配体铬络合物对水生生态系统存在潜在风险。Industrial wastewater frequently contains priority pollutants like chromium,which tend to form complexes with organic molecules.These complexes are challenging to remove,often leading to substantial environmental discharge.In this study,Selenastrum capricornutum served as the model organism to investigate the biological impact of various multiligand chromium complexes on algal cells.Results showed that the multiligand chromium complexes significantly elevated the level of reactive oxygen species(ROS)in the algal cells(increases of 44%to 55%),which induced oxidative stress and consequently inhibited algal growth to different extents(inhibition rates ranged from 16%to 67%).Extended exposure further hindered the synthesis of soluble proteins and carbohydrates in Selenastrum capricornutum.Notably,gelatin-gallic acid-chromium complexes were identified as the most biotoxic of the multiligand chromium complexes studied.Furthermore,Selenastrum capricornutum exhibited some degree of biodegradation of these complexes after long-term co-cultivation.These findings suggest that multiligand chromium complexes could pose considerable risks to aquatic ecosystems.

关 键 词：多配体铬络合物 羊角月牙藻 毒性 生物转化 铬 

分 类 号：X789[环境科学与工程—环境工程]