Zhou, S. W.1; Song, Z. Z.1; Meng, L.2; Liu, X.1
; Zhang, H. Y.1; Bi, X. L.2发表期刊EURASIAN SOIL SCIENCE
ISSN1064-2293
2021-08-28
页码10
关键词Bordeaux mixtureadsorption capacity of soils
DOI10.1134/S106422932110015X
通讯作者Bi, X. L.(xlbi@yic.ac.cn)
英文摘要The sorption and transport of copper (Cu) in an acidic brown soil were studied using batch and column experiments. The results showed that Cu adsorption fitted better Langmuir isotherm at low pH (3.13) whereas Freundlich equation fitted better at high pH (5.87), and affinity (K and K-F) increased significantly from 0.00676 to 0.0121 L mg(-1), and from 33.05 to 135.98, respectively, with pH increase, resulting in a very great increase in adsorption capacity (Q(max)) from 970 to 2272 mg kg(-1). Its kinetics was found to be better described by a pseudo-second order model (R-2 > 0.997), where sorption rate (k(2) and h) was as low as 0.0237 and 0.0013 kg mg(-1) d(-1), and 23.89 and 106.12 mg kg(-1) d(-1), respectively, at pH 3.19, much lower (10-20 times) than those at pH 6.92. At pH 5.87, the breakthrough curve of Cu showed substantial retardation and low peak concentration (C/C-0 = 0.64); whereas at pH 3.17, full breakthrough (C/C-0 = 1) was observed, meaning great increase in mobility of Cu. Generally, two different mechanisms governed Cu sorption and transport: CuOH+ was precipitated on clay mineral surface and weaker complexation with DOM at higher pH (>5); whereas Cu2+ adsorbed to SOM surface and stronger complexation with DOM at lower pH (<4.2).
资助机构National Natural Science Foundation of China; high-level talent project of Ludong University
收录类别SCI
语种英语
关键词[WOS]DISSOLVED ORGANIC-MATTER; HEAVY-METAL; VINEYARD SOILS; HUMIC-ACID; ADSORPTION; CU(II); CU; IONS; FRACTIONATION; KINETICS
研究领域[WOS]Agriculture
WOS记录号WOS:000690707000005
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/29707
专题中科院海岸带环境过程与生态修复重点实验室_海岸带信息集成与战略规划研究中心
中科院海岸带环境过程与生态修复重点实验室
通讯作者Bi, X. L.作者单位1.Ludong Univ, Sch Agr, Yantai 264025, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
推荐引用方式
GB/T 7714Zhou, S. W.,Song, Z. Z.,Meng, L.,et al. Copper Sorption and Transport in an Acidic Brown Soil[J]. EURASIAN SOIL SCIENCE,2021:10.
APAZhou, S. W.,Song, Z. Z.,Meng, L.,Liu, X.,Zhang, H. Y.,&Bi, X. L..(2021).Copper Sorption and Transport in an Acidic Brown Soil.EURASIAN SOIL SCIENCE,10.
MLAZhou, S. W.,et al."Copper Sorption and Transport in an Acidic Brown Soil".EURASIAN SOIL SCIENCE (2021):10.
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