Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附:表面配位模型及线性自由能关系

doi:10.3866/PKU.WHXB201306271

CORC > 北京大学 > 化学与分子工程学院

	Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附:表面配位模型及线性自由能关系; Adsorption of Co(Ⅱ) and Ni(Ⅱ) on Beishan Granite:Surface Complexation Model and Linear Free Energy Relationship
	陈宗元 ; 张瑞 ; 杨兴龙 ; 吴王锁 ; 郭治军 ; 刘春立
刊名	物理化学学报
	2013
关键词	北山花岗岩吸附表面配位模型线性自由能关系 Co(Ⅱ) Ni(Ⅱ) Beishan granite Adsorption Co(Ⅱ) Ni(Ⅱ) Surface complexation model Linear free energy relationship
DOI	10.3866/PKU.WHXB201306271
英文摘要	用批式法研究了Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩(BS03,600 m)上的吸附.Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附分配比(Kd)均随pH值、离子强度和吸附质浓度的变化而变化:在低pH值范围,Co(Ⅱ)和Ni(Ⅱ)的Kd值随离子强度的增大显著减小,而在高pH值范围,离子强度对Kd的影响较小;Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附作用可以分别用1个离子交换反应和2个内层表面配位反应进行定量描述.建立了表面配位反应平衡常数(K)与过渡金属二价离子水解常数(OHK)之间的线性自由能关系(LFER),据此对Pb(Ⅱ)和Cu(Ⅱ)在花岗岩上的吸附进行了预测,并与实验结果进行了对比,获得了较好的一致性.; The adsorption of Co(II) and Ni(II) on crushed Beishan granite (BS03, 600 m) was studied by a batch experimental method. The distribution coefficient (K-d) was found to vary as a function of the pH, ionic strength, and the initial concentrations of Co(II) and Ni(II). In the low pH range, the K-d values of Co(II) and Ni(II) decreased significantly as the ionic strength increased, whereas the effect of the ionic strength was weak in the high pH range. The adsorption of Co(II) and Ni(II) on granite was quantitatively interpreted by a model with one cation exchange reaction and two inner-sphere surface complexation reactions. A linear free energy relationship (LFER) between the equilibrium constants (K) of the surface complexation reactions and the hydrolysis stability constants of the divalent transition metals (K-OH) was established. Predictions based on the LFER are in good agreement with the experimental results for the adsorption of Pb(II) and Cu(II) on granite.; The project was supported by the National Natural Science Foundation of China; Special Foundation for High Level Waste Disposal,China ([2012]494,[2007]840,[2012]851).国家自然科学基金; 核设施退役和放射性废物治理科研专项; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000324658800023&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 1; 9; 2019-2026; 29
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/220841]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	陈宗元,张瑞,杨兴龙,等. Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附:表面配位模型及线性自由能关系, Adsorption of Co(Ⅱ) and Ni(Ⅱ) on Beishan Granite:Surface Complexation Model and Linear Free Energy Relationship[J]. 物理化学学报,2013.
APA	陈宗元,张瑞,杨兴龙,吴王锁,郭治军,&刘春立.(2013).Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附:表面配位模型及线性自由能关系.物理化学学报.
MLA	陈宗元,et al."Co(Ⅱ)和Ni(Ⅱ)在北山花岗岩上的吸附:表面配位模型及线性自由能关系".物理化学学报 (2013).