| 生物质基纳米HZO杂化材料的研制及其除磷特性 |
| 摘要点击 2537 全文点击 848 投稿时间：2017-06-13 修订日期：2017-08-22 |
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| 中文关键词 秸秆 水合氧化锆 磷酸盐 吸附 再生 |
| 英文关键词 wheat straw hydrous zirconium oxide phosphate adsorption regeneration |
| 作者 | 单位 | E-mail | | 邱慧 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | hqiu@nuist.edu.cn | | 秦智峰 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | | | 刘凤玲 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | | | 梁晨 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | | | 宋明霞 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | | | 许正文 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | | | 管益东 | 南京信息工程大学环境科学与工程学院, 江苏省大气环境与装备技术协同创新中心, 南京 210044 | |
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| 中文摘要 |
| 采用3-氯-2-羟丙基三甲基氯化胺（CTA）对生物质秸秆进行胺基化改性获得St-N'，通过正交试验确定其最佳合成条件为NaOH质量分数30%、CTA体积100 mL、反应温度80℃、反应时间3h.通过原位沉积法将纳米水合氧化锆（HZO）固载于St-N'内部，制备得到生物质基纳米HZO杂化材料St-N'-Zr.SEM、TEM、XRD与BET等技术表明纳米HZO已成功负载于St-N'内部，以无定形为主，分布均匀，粒径为50~100 nm.批次吸附实验结果表明，St-N'-Zr吸附磷酸根符合Langmuir吸附等温模型，最大吸附量为33.90 mg ·g-1；最佳吸附pH为1.8~6.0，可用于酸性水体除磷；强竞争离子体系中，磷去除率始终高于初始吸附量的70%，性能明显优于商用阴离子交换树脂D-201，吸附选择性良好.经10次吸附-解吸循环，再生性能良好，表明在水体磷污染深度治理领域具有一定应用潜力. |
| 英文摘要 |
| Wheat straws were modified by 3-chloro-2-hydroxypropyl trimethylammonium chloride (CTA) to obtain aminated wheat straw St-N'. The optimum synthetic conditions were determined to be NaOH with 30% mass fraction, CTA of 100 mL, reaction temperature of 80℃, and reaction time of 3 h, which was verified by orthogonal experiments. Nano-sized hydrous zirconium oxides (HZO) were immobilized into St-N' by an in situ precipitation method to obtain the nanocomposite St-N'-Zr. The SEM, TEM, XRD, and BET results indicated that the nano-sized HZO with 50-100 nm sizes were uniformly loaded onto the inner surface of the biomass-based carrier St-N' that was amorphous in nature. A Langmuir adsorption isotherm fitted the adsorption process well, and the maximum adsorption amount was calculated to be 33.90 mg·g-1. The optimal pH range was 1.8-6.0, displaying good removal capacity of phosphate in acidic waters. In the presence of high levels of competing anions, the phosphate adsorption still retained more than 70% of the original amount, showing the higher preference of St-N'-Zr towards phosphate than towards the commercial anion exchanger D-201. After 10 cycles of adsorption-desorption, the removal efficiency remained stable, confirming the good regeneration ability and potential application of St-N'-Zr. |
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