粉煤灰改性条件的优化及其对孔雀石绿吸附性能的影响

Optimization of modification conditions of coal fly ash and its effect on adsorption performance of basic green

王琰 ¹王海涛 ²刘国昌 ³常娜 ⁴孙玮³

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作者信息

1. 自然资源部天津海水淡化与综合利用研究所,天津 300192;天津工业大学环境科学与工程学院,天津 300387
2. 天津工业大学环境科学与工程学院,天津 300387
3. 自然资源部天津海水淡化与综合利用研究所,天津 300192
4. 天津工业大学化学工程与技术学院,天津 300387
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摘要

以粉煤灰(CFA)为原料,通过控制酸碱改性剂投加顺序、酸碱改性剂用量等改性因素制备出六种不同形貌、不同比表面积的改性粉煤灰(MCFA),通过SEM、BET、EDS及XRD等表征手段对MCFA的结构进行表征.以配制的孔雀石绿(BG)染料溶液模拟染料废水,通过对BG染料的去除效果来确定最佳改性工艺条件.结果表明,采用酸碱两步改性法对CFA吸附能力的提升效果最为显著,对BG染料的去除率由 61.48%提升至 97.92%,吸附量由 61.48 mg/g提高至97.92 mg/g,其形貌的变化表现出了对吸附能力的提高与改善.

Abstract

Using coal fly ash(CFA)as raw material,six kinds of modified coal fly ash(MCFA)with different morphology and specific surface area were prepared by controlling the order of modifier addition and the amount of modifier.The structure of MCFA was char-acterized by SEM,BET,EDS and XRD.The prepared basic green(BG)dye solution was used to simulate the dye wastewater,and the optimum modification process conditions were determined by the influence of BG dye removal rate.The results showed that the acid-base two-step modification method had the most significant effect on the adsorption efficiency of CFA,and the removal rate of BG dye increased from 61.48％ to 97.92％,the adsorption ca-pacity increased from 61.48 mg/g to 97.92 mg/g.The change of morphology showed the im-provement of adsorption capacity.

关键词

无机非金属材料/改性粉煤灰/吸附/染料废水/孔雀石绿

Key words

inorganic non-metallic materials/modification of coal fly ash/adsorption/dye wastewater/basic green

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基金项目

中央级公益性科研院所基本科研业务费专项(K-JBYWF-2023-QR-02)

出版年

2024

石油化工应用

宁夏化工学会

石油化工应用

影响因子：0.276

ISSN：1673-5285

参考文献量6

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