您好，欢迎访问重庆市农业科学院 机构知识库！

Preliminary investigation of phosphorus adsorption onto two types of iron oxide-organic matter complexes

文献类型： 外文期刊

作者： Yan, Jinlong 1 ; Jiang, Tao 1 ; Yao, Ying; Lu, Song 1 ; Wang, Qilei 1 ; Wei, Shiqiang 1 ;

作者机构： 1.Southwest Univ, Key Lab Ecoenvironm Gorges Reservoir Reg 3, Chongqing Key Lab Agr Resources & Environm,Minist, Coll Resources & Environm,Dept Environm Sci & Eng, Chongqing 400716, Peoples R China

2.Swedish Univ Agr Sci, Dept Forest Ecol

关键词： Phosphorus;Ferrihydrite-humic acid complex;Goethite-humic acid complex;Adsorption

期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCES （ 影响因子：5.9； 五年影响因子：5.6 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Iron oxide (FeO) coated by natural organic matter (NOM) is ubiquitous. The associations of minerals with organic matter (OM) significantly changes their surface properties and reactivity, and thus affect the environmental fate of pollutants, including nutrients (e.g., phosphorus (P)). In this study, ferrihydrite/goethite-humic acid (FH/GE-HA) complexes were prepared and their adsorption characteristics on P at various pH and ionic strength were investigated. The results indicated that the FeO-OM complexes showed a decreased P adsorption capacity in comparison with bare FeO. The maximum adsorption capacity (Q(max)) decreased in the order of FH (22.17 mg/g) > FH-HA (5.43 mg/g) > GE (4.67 mg/g) > GE-HA (3.27 mg/g). After coating with HA, the amorphous FH-HA complex still showed higher P adsorption than the crystalline GE-HA complex. The decreased P adsorption observed might be attributed to changes of the FeO surface charges caused by OM association. The dependence of P adsorption on the specific surface area of adsorbents suggests that the FeO component in the complexes is still the main contributor for the adsorption surfaces. The P adsorptions on FeO-HA complexes decreased with increasing initial pH or decreasing initial ionic strength. A strong dependence of P adsorption on ionic strength and pH may demonstrate that outer-sphere complexes between the OM component on the surface and P possibly coexist with inner-sphere surface complexes between the FeO component and P. Therefore, previous over-emphasis on the contributions of original minerals to P immobilization possibly over-estimates the P loading capacity of soils, especially in humic-rich areas. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

  • 相关文献

[1]Equilibrium and Kinetic Studies of Phosphate Adsorption Onto Corn Straw Char Supported Nano Ferric Oxide Composite. Zhou, Hongguang,Jiang, Zhenmao,Wei, Shiqiang. 2015

[2]A new hydrotalcite-like absorbent FeMnMg-LDH and its adsorption capacity for Pb2+ ions in water. Zhou, Hongguang,Jiang, Zhenmao,Wei, Shiqiang,Zhou, Hongguang,Jiang, Zhenmao,Wei, Shiqiang,Zhou, Hongguang,Jiang, Zhenmao,Wei, Shiqiang. 2018

[3]Effect of dissolved organic matter on adsorption and desorption of mercury by soils. Yang Yongkui,Liang Li,Wang Dingyong,Wang Dingyong.

[4]Adsorption and desorption characteristics of endosulfan in two typical agricultural soils in Southwest China. Qian, Sheng,Zhu, Heng,Xiong, Bailian,Zhang, Jinzhong,Xu, Weihong,Xiong, Bailian,Zheng, Guocan,Zhang, Jinzhong.

[5]CONCENTRATION OF NUTRIENTS IN STREET DUSTS OF MEGA-CITY, CHENGDU, SOUTHWEST CHINA. Zhang, Bin,Luo, Benfu,Mei, Ziliang,Jiang, Tao.

[6]Underestimation of phosphorus fraction change in the supernatant after phosphorus adsorption onto iron oxides and iron oxide-natural organic matter complexes. Yan, Jinlong,Wang, Jun,Wei, Shiqiang,Jiang, Tao,Yao, Ying,Cai, Yuanli,Green, Nelson W..

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：重庆市农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台