期刊
CHEMICAL ENGINEERING JOURNAL
卷 251, 期 -, 页码 285-292出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.04.036
关键词
Nano-bimetal ferrites; CuFe2O4; Industrial sludge; Phosphorus; Kinetics and thermodynamics
资金
- MOE
- NCKU
- [NSC102-2119-M-006]
Phosphorus (P) in natural aquatic environments is one of the most critical elements for causing eutrophication. On the other hand, it is also an essential nutrient for organisms in broad ecosystems. Therefore, it has become an important issue in environmental and ecological sciences to remove and recover efficiently of P in various water bodies. This study investigates the feasibility of P removal/recovery using nano-bimetal ferrites (CuFe2O4), manufactured from industrial sludge. These new results reveal that a rapid P removal, from 9.9% to 99.9%, was observed when the solution pH decreased from 9.06 to 2.64. The maxima P adsorption capacity was found to be 13.5 mg g(-1) at pH 2.64 (318 K), which is much higher than other available adsorbents. The observed negative changes in the standard free energy (Delta G = -4.99, -5.47, -6.12, -7.21 kJ mol(-1) at 288, 298, 308, and 318 K, respectively) and the positive value of Delta H (1.92 kJ mol(-1)) demonstrate that the adsorption reaction is spontaneous and endothermic. Moreover, we observed also that the P adsorption increases with the increased of ionic strength from 0.001 to 1.0 N, suggesting important involvement of some inner-sphere mechanisms. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据