| Related citation: | Yanping Zhang,Jiahua Pei,Fen Li,Lingchong Li,Jiayu Tian.β-FeOOH Modified Sludge Biochar as Efficient Adsorbent for Phosphate Removal[J].Journal of Harbin Institute Of Technology(New Series),2022,29(3):34-45.DOI:10.11916/j.issn.1005-9113.2021113.. |
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| Author Name | Affiliation | | Yanping Zhang | School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China | | Jiahua Pei | School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China | | Fen Li | Department of Civil and Environmental Engineering, Harbin University of Science and Technology, Harbin 150000, China | | Lingchong Li | School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China | | Jiayu Tian | School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China |
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| Abstract: |
| β-FeOOH modified sludge biochar (FSBC) was prepared and investigated in this work to remove phosphate from water via adsorption. FSBC exhibited superior adsorption performance for phosphate with the maximum adsorption amount of 27.17 mg/g at 25 ℃. The specific adsorption capacity of FSBC was 57.8% higher than that of commercial activated carbon at pH 5 with the initial phosphate concentration of 10 mg/L. Coexisting anions can inhibit the adsorption of phosphate, but cations (Cr(VI) and Cd2+) exhibited some promotion effect. The results of kinetic and isotherm models and characterization analysis in combination indicated chemical adsorption, as electrostatic interaction, metal phosphate precipitation and hydrogen bonding may be the dominant process. The adsorption of phosphate onto FSBC was a monolayer adsorption, and the process was endothermic. After four adsorption/desorption cycles, the adsorption capacity of FSBC for phosphate decreased by 36.4%, which was in a distinct comparison with the 57.5% of SBC. |
| Key words: sludge biochar β-FeOOH phosphate adsorption |
| DOI：10.11916/j.issn.1005-9113.2021113. |
| Clc Number:TU993.3 |
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| Descriptions in Chinese: |
| β-FeOOH改性污泥生物炭吸附除磷研究 张彦平1*, 裴佳华1, 李芬2, 李凌冲1, 田家宇1* （1.河北工业大学 土木与交通学院，天津 300401； 2.哈尔滨理工大学 土木与环境工程系，哈尔滨 150040） 摘要： 采用β-FeOOH改性污泥生物炭（FSBC），研究了其吸附除磷的效果。结果表明：FSBC对磷具有较好的吸附效果，25°C时最大吸附量为27.17 mg/g。在初始pH 5，初始磷浓度为10mg/L时，FSBC的吸附能力比商用活性炭高57.8%。溶液中共存阴离子能抑制磷的吸附，但是阳离子（Cr(VI)和Cd2+）能促进吸附除磷效果。吸附动力学、吸附等温线及表征分析综合表明化学吸附，如静电引力、金属磷酸盐沉淀和氢键，在吸附过程中起主要作用。磷在FSBC表面的吸附为单分子层吸附，吸附过程为吸热反应。FSBC经过四次循环后吸附能力仅降低36.4%，而污泥炭降低了57.5%。 关键词：污泥生物炭，β-FeOOH，磷，吸附 |
