التفاصيل البيبلوغرافية
| العنوان: |
海藻酸钠基吸附剂对阳离子染料吸附性能. (Chinese) |
| Alternate Title: |
Adsorption Performance of Sodium Alginate-based Adsorbent for Cationic Blue X-GRRL. (English) |
| المؤلفون: |
孙后飞, 张宾, 柳荣展 |
| المصدر: |
Environmental Science & Technology (10036504); 2023, Vol. 46 Issue 7, p198-206, 9p |
| Abstract (English): |
To provide a theoretical guidance for the resource utilization of sodium alginate (SA) in reactive dye printing wastewater, alginate microspheres were prepared by using SA as raw material, potassium carbonate as activator, and zinc chloride as cross-linking agent, then alginate-based adsorbent (ZAC) was obtained by using a facile one-step carbonization activation method. The microstructure and morphology of ZAC and the pyrolysis characteristics of microspheres were characterized by SEM, BET, XRD and thermogravimetric analysis. Also the adsorption performance of ZAC was evaluated for removing of cationic blue X-GRRL dye from its aqueous solution. The results showed that when the carbonized temperature was 1 000 ℃ and the mass ratio of K2CO3 to SA was 1.5∶2, the ZAC-1.5 had a specific surface area of 1 269.17 m² /g, a total pore volume of 1.63 cm3 / g and a mesoporosity of 84.66%. Compared with non-activated sample, an increase of 26.17%, 85.23% and 46.09% respectively was observed. A high adsorption capacity of 1 174.55 mg/g was obtained at pH 5.3 for an adsorbent dose of 0.20 g/L of 250 mg/L dye concentration at 25 ℃ for 360 min. Its adsorption thermodynamics conforms to Langmuir isothermal adsorption model, and the adsorption kinetics is well described by the pseudo-second-order kinetic model. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
为对活性染料印花废水中海藻酸钠(SA)的资源化利用提供理论指导, 文章以SA为原料、K2CO3作为活化剂、ZnCl2为交联 剂制备了海藻酸盐微球, 再通过-步碳化活化法制备得到吸附剂(ZAC), 采用SEM、BET、XRD及热重分析对ZAC的微观结构和形貌及 微球的热解特性进行了表征, 并将ZAC用于阳离子蓝X-GRRL染料的吸附脱色研究. 结果表明: 在碳化活化温度1 000 ℃、K2CO3与SA 的质量比为1.5∶2的条件下制备的ZAC-1.5比表面积可达1 269.17 m² /g, 总孔体积为1.63 cm³ /g, 介孔率达84.66%, 与未K2CO3活化样品 相比分别提高了 26.17%、85.23%、46.09%. 对浓度为 250 mg/L 的阳离子蓝 X-GRRL 溶液, 在 ZAC-1.5 投加量 0.20 g/L、吸附时间 360 min、吸附温度25 ℃、pH 5.3的条件下, 吸附容量可达1 174.55 mg/g. 其吸附等温模型符合Langmuir 模型, 吸附动力学可由准二级动 力学模型更好地描述. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
