| Preparation of Lignin Based Anion Exchanger for Nitrate and Phosphate Removal |
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| Author Name | Affiliation | | Fan Zhai1 | 1. Key Laboratory of Pulp & Paper Science and Technology, Ministry of Education, Qilu University of Technology, Ji’nan, Shandong Province, 250300, China | | Zhen Wang1,2,* | 1. Key Laboratory of Pulp & Paper Science and Technology, Ministry of Education, Qilu University of Technology, Ji’nan, Shandong Province, 250300, China
2. Key Laboratory of Cleaner Production and Industrial Waste Recycling and Resourcization, Ministry of Education, Qilu University of Technology, Ji’nan, Shandong Province, 250300, China | | Yu Liu1 | 1. Key Laboratory of Pulp & Paper Science and Technology, Ministry of Education, Qilu University of Technology, Ji’nan, Shandong Province, 250300, China |
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| Fund Project:The authors are grateful for the financial support from the provincial scientific and technological project (2011GGB01165), the “Independent Innovation Project of Colleges and Universities” fund by Ji’nan city, Shandong province (No. 201004035-2), the national twelfth five-year science and technology support program (No. 2014BAC13B04), and the “Major Projects for Analysis and Breakthrough of Several Significant Environmental Bottleneck Issues of Economic and Social Development in Shandong Province” (SDHBPJ-ZB-06). |
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| Abstract:Tertiary amino alkali lignin (TA-AL) was successfully synthesized by a two-step approach; its application as an adsorbent for nitrate and phosphate ions in effluents was investigated. TA-AL was characterized by FT-IR, zeta potential, SEM, and elemental analysis. Kinetic and equilibrium adsorption isotherms were determined to investigate the adsorption capacity of TA-AL. The results revealed that TA-AL had a very strong adsorption capacity towards anions; the value of pHPZC(PZC, point of zero charge) was about 9.2. The adsorption of nitrate and phosphate ions was related to effluent pH and initial anion concentration. The maximum absorption of nitrate and phosphate ions was about 26.9 and 18.4 mg/g when the initial concentration of the ions was 50 mg/L. The adsorption kinetics conformed to the pseudo-second-order kinetic equation, and the equilibrium data were suitably expressed by the Freundlich model. The regeneration studies confirmed that the lignin-based material was a promising adsorbent for nitrate and phosphate ions in water. |
| keywords:aminated alkali lignin phosphate nitrate adsorption |
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