Industrial Water Treatment ›› 2022, Vol. 42 ›› Issue (3): 90-97. doi: 10.19965/j.cnki.iwt.2021-0670

• RESEARCH AND EXPERIMENT • Previous Articles     Next Articles

Optimized preparation of modified oyster shell powder and its adsorption performance for glyphosate

Wei ZHANG1,2(),Zhe LIANG3(),Aihe WANG1,2,Jinkai SHU1,2,Mengyuan HU1   

  1. 1.School of Municipal and Geomatics Engineering, Hunan City University, Yiyang 413000, China
    2.Hunan Province Engineering & Technology Research Center for Rural Water Quality Safety, Yiyang 413000, China
    3.School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China
  • Received:2021-11-30 Online:2022-03-20 Published:2022-03-21
  • Contact: Zhe LIANG E-mail:877126365@ qq.com;249713349@qq.com

改性牡蛎壳粉优化制备及其对草甘膦的吸附性能

张伟1,2(),梁哲3(),汪爱河1,2,舒金锴1,2,胡孟源1   

  1. 1.湖南城市学院市政与测绘工程学院, 湖南 益阳 413000
    2.湖南省村镇饮用水水质安全保障工程技术研究中心, 湖南 益阳 413000
    3.沈阳建筑大学市政与环境工程学院, 辽宁 沈阳 110168
  • 通讯作者: 梁哲 E-mail:877126365@ qq.com;249713349@qq.com
  • 作者简介:张伟(1973— ),博士,教授。E-mail:877126365@ qq.com|梁哲,硕士研究生。E-mail:249713349@qq.com
  • 基金资助:
    国家自然科学基金项目(42071122)

Abstract:

Glyphosate is a typical organic phosphorus that causes eutrophication of water. The modified oyster shell powder was synthesized by high temperature doping. The adsorption of simulated glyphosate wastewater by modified oyster shell powder was studied. The results showed that the optimum preparation conditions were as follows:calcination temperature 900 ℃,sieved particle size 120 mesh(125 μm),starch dosage(starch quality/oyster shell powder quality)15%,calcination time 2.5 h and alkali treatment. X?ray diffraction showed that the surface compositions of the modified oyster shell powder were CaCO3 and Ca(OH)2. Surface analyzer results showed that the specific surface area of modified oyster shell powder increased by 21.3% compared with that of the unmodified powder. Infrared spectrum analysis showed that there were hydroxyl group appeared in the modified oyster shell powder. The adsorption process of modified oyster shell powder conformed to the pseudo second-order kinetic model and Langmuir model,and the maximum adsorption capacity was 66.06 mg/g.

Key words: oyster shell powder, modified, optimized preparation, glyphosate, adsorption

摘要:

草甘膦是造成水体富营养化的典型有机磷。通过高温掺杂合成改性牡蛎壳粉,并用其对模拟草甘膦废水进行吸附研究。结果表明,改性牡蛎壳粉最优制备条件:煅烧温度900 ℃,过筛粒径120目(125 μm),淀粉用量(淀粉质量/牡蛎壳粉质量)15%,煅烧时间2.5 h,并进行碱处理。XRD表明,制备的改性牡蛎壳粉表面成分为CaCO3和Ca(OH)2;表面分析结果表明,改性牡蛎壳粉比表面积相较未改性前增大21.3%;红外光谱分析表明,制备的改性牡蛎壳粉存在羟基官能团。改性牡蛎壳粉吸附草甘膦过程符合准二级动力学模型和Langmuir模型,最大吸附量为66.06 mg/g。

关键词: 牡蛎壳粉, 改性, 优化制备, 草甘膦, 吸附

CLC Number: