| Autor: |
Shaofeng Xiong, Longfei Ma, Lu Jiang, Xiayi Hu, Guangyue Fu, Jian Hao, Hengjiao Gao, Pingle Liu, Liu Tan, Xiaona Liu, Qingmei Wu, Donghong Ouyang |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
The Science of the total environment. 858(Pt 3) |
| ISSN: |
1879-1026 |
| Popis: |
Efficient treatment of wastewater is of paramount importance for protecting the ecosystem. In this work, we prepared a low-grade sepiolite with low Na/La salt loadings (Na/La-Sep) and employed it for the simultaneous removal of ammonia (N) and phosphate (P) species in the wastewater. The key factors influencing the nutrient removal efficiency of Na/La-Sep, such as the concentration of the La/Na salt solution, the co-existing ion type, and surface zero charges, were investigated. Na/La-Sep exhibits excellent N and P adsorption capability and reduced the N and P concentrations in the spiked and real-world wastewaters to below the allowable N and P discharge limits. Due to the extraordinarily low cost of low-grade sepiolite and the low loading of Na/La salts, Na/La-Sep has a substantially lower cost when compared to other reported clay mineral adsorbents. Furthermore, the N and P removal mechanisms by Na/La-Sep were unraveled by combining the kinetic studies, the molecular dynamics (MD) simulation, and the electron density difference. The present findings might shed light on a new way to develop cost-efficient and high-efficiency adsorbents for alleviating eutrophication and deepen the understanding of N and P removal at a molecular level. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect