水稻秸秆灰对水中双酚A的吸附去除性能研究
PDF下载 (338)王健斐,陈再明,李 兵.水稻秸秆灰对水中双酚A的吸附去除性能研究[J].宁波大学学报(理工版),2020,33(2):66-72.DOI:
WANG Jianfei,CHEN Zaiming,LI Bing.Adsorptive removal of bisphenol A by rice straw derived ash in aqueous solution[J].Journal of Ningbo University(Natural Science & Engineering Edition),2020,33(2):66-72.DOI:
| Title: | Adsorptive removal of bisphenol A by rice straw derived ash in aqueous solution |
| 作者: | 王健斐, 陈再明, 李 兵 |
| Author(s): | WANG Jianfei, CHEN Zaiming, LI Bing |
| 关键词: | 水稻秸秆灰; 双酚A; 吸附; 去除 |
| Keywords: | 水稻秸秆灰; 双酚A; 吸附; 去除 |
| 分类号: | X53 |
| 文献标识码: | A |
| 摘要: | 以比表面积为1 572 m2·g-1的粉末活性炭为参照, 研究了水稻秸秆于350和500 ℃灼烧产生的灰对双酚A的吸附性能, 为认识和利用水稻秸秆灰去除水中有机微污染物提供参考. 结果显示, 水稻秸秆灰对双酚A的去除过程符合两室模型, 其快吸附阶段在2 h内平衡, 慢吸附阶段需5~7 d才能平衡, 慢于活性炭的吸附平衡过程(需2.5 h). 水稻秸秆灰的吸附等温线符合Dubinin- Ashtakhov模型, 单位质量的最大吸附容量为18.0 mg·g-1 (350℃灰分)和10.3 mg·g-1 (500℃灰分), 是活性炭(245 mg·g-1)的4.2%~7.3%; 单位比表面积的最大吸附容量为1.81 mg·m-2 (350 ℃灰分)和1.68 mg·m-2 (500 ℃灰分), 是活性炭(0.156 mg·m-2)的11~12倍, 表明水稻秸秆灰是一种单位比表面吸附效率较高的双酚A吸附剂. |
| Abstract: | Adsorptive characteristics of bisphenol A onto two ashes made by combustion of rice straw at 350 and 500 ℃ were investigated to develop a new sorbent for bisphenol A removal. Sorption of bisphenol A onto an activated charcoal (AC) with specific surface area of 1 572 m2·g-1 was also examined as reference. Sorption kinetics of rice straw ashes followed a two-compartment model, owing a fast sorption with equilibrium time <2 hours and a slow sorption with equilibrium time of 5-7 days. The adsorptive rates of the ashes were slower than AC, on which the sorption was finished within 2.5 hours. Sorption isotherm curves of ashes followed the Dubinin- Ashtakhov model. The mass-based maximum adsorption capacity of ashes was estimated to be 18.0 mg·g-1 (ash from 350 ℃) and 10.3 mg·g-1 (ash from 500 ℃) respectively, reaching 22%-39% of AC adsorption capacity (245 mg·g-1). The surface area-based maximum adsorption capacity ( ) of ashes was 1.81 mg·m-2 (ash from 350 ℃) and 1.68 mg·m-2 (ash from 500 ℃) respectively. These values were 11-12 times of AC ( =0.156 mg·m-2), demonstrating that rice straw ash had a surface of high-efficiency for bisphenol A adsorption. |
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| 备注/Memo: | 收稿日期: 2019－09－01. 宁波大学学报（理工版）网址: http://journallg. nbu. edu. cn/ 基金项目: 国家住建部研究开发项目（2018-K7-010）; 浙江省自然科学基金（LQ15B070001, LGF19E080006）.? 第一作者: 王健斐（1994－）, 男, 浙江台州人, 在读硕士研究生, 主要研究方向: 有机污染控制. E-mail: 1528500632@qq.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/*通信作者: 陈再明（1986－）, 男, 浙江台州人, 讲师, 主要研究方向: 土壤污染控制. E-mail: chenzaiming@nbu.edu.cn |
