摘要
该文以不同碳源反硝化生物滤池(DNBF)出水可溶性微生物产物(SMP)为对象,研究不同温度和pH条件下SMP对Cu^(2+)的螯合能力。结果表明,SMP螯合Cu^(2+)的过程符合Langmuir、Freundlich和Temkin吸附等温曲线;在温度为35℃和pH为5时,以乙酸钠为碳源的DNBF出水中SMP螯合Cu^(2+)的能力最强,最大吸附量为0.574 g/g。采用冷场发射式扫描电镜、傅里叶红外光谱仪和三维荧光光谱仪等表征SMP,显示SMP与Cu^(2+)作用前后的形貌特征发生了明显变化。SMP与Cu^(2+)发生螯合作用主要依赖于蛋白质、多糖和腐殖质中富含的-COOH、-NH_(2)和-OH等官能团。
The chelating ability of SMP on Cu^(2+)in the effluent of denitrifying biological filter(DNBF)fed with different carbon sources was investigated under different temperature and pH conditions.The results showed that the Cu^(2+)chelation process of SMP followed Langmuir,Freundlich and Temkin adsorption isotherms.At the temperature of 35℃and pH of 5,SMP from DNBF effluent with sodium acetate as the carbon source exhibited the strongest chelating ability for Cu^(2+),and the maximum adsorption capacity reached 0.574 g/g.Cold-field emission scanning electron microscopy(SEM),Fourier infrared spectroscopy(FT-IR)and three-dimensional fluorescence spectroscopy(3 D-EEM)were used to characterize SMP,which indicated that the SMP morphology changed significantly before and after interaction with Cu^(2+).The chelation of SMP with Cu^(2+)mainly depends on the-COOH,-NH_(2) and-OH functional groups which are abundant in protein,polysaccharide and humus.
作者
周雨
姜芳媛
石先阳
ZHOU Yu;JIANG Fangyuan;SHI Xianyang(Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration,School of Resources and Environmental Engineering,Anhui University,Hefei 230601,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第4期1-8,共8页
Environmental Science & Technology
基金
安徽省重大科技专项(202003a07020014)。
