化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (7) : 183-187. DOI: 10.19817/j.cnki.issn1006-3536.2022.07.038

科学研究

H₂O₂改性大豆不溶性膳食纤维及其对铅的吸附研究

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Optimization of modification of SIDF with H₂O₂ and its adsorption for Pb

Xu Xiqi^1,2, Wang Sainan^1,2, Zhang Zhao³, Yu Hansong^1,2, Cheng Zhiqiang⁴

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Received		Published
2021-04-18		2022-07-20
Issue Date	Revised Date
2022-08-09	2021-04-18

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摘要

以大豆不溶性膳食纤维(SIDF)为原料,采用H₂O₂改性大豆不溶性膳食纤维,利用单因素试验和Box-Behnken响应面法对改性条件进行优化,并将改性后的SIDF作为新型生物吸附剂对水溶液中铅离子进行吸附。响应面分析结果表明,pH和温度对Pb²⁺去除率的影响显著,最终确定最佳改性条件为H₂O₂浓度2.4%、温度36℃、pH=8.7,实际测得Pb²⁺去除率为95.05%±0.12%,对Pb²⁺的吸附容量为142.5mg/g。同时还通过红外光谱(FT-IR)对改性前后的SIDF进行了表征。研究表明,通过H₂O₂改性SIDF可提高其对水溶液中Pb²⁺的吸附作用,为其作为生物吸附剂用于污水处理奠定基础。

Abstract

Soybean insoluble dietary fiber (SIDF) was modified by H₂O₂.The modification conditions were optimized by single factor experiment and Box-Behnken response surface method.The modified SIDF was used as new biosorbent to adsorb Pb ions in aqueous solution.The results of response surface analysis showed that pH value and temperature had significant effect on the removal rate of Pb²⁺.The optimal modification conditions were determined as follows:H₂O₂ concentration 2.4%,temperature 36℃,pH value 8.7,and the actual Pb²⁺ removal rate was 95.05%±0.12%,and the adsorption capacity for Pb²⁺ was 142.5mg/g.At the same time,the modified and unmodified SIDF were characterized by fourier transform infrared spectroscopy (FT-IR).The results showed that the adsorption of Pb²⁺ in aqueous solution could be improved by modifying SIDF with H₂O₂,and it layed foundation for its application in wastewater treatment as a biosorbent.

关键词

H₂O₂改性 / 响应面法 / 大豆不溶性膳食纤维 / 铅离子

Key words

H₂O₂ modification / response surface methodology / soybean insoluble dietary fiber / lead ion

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H₂O₂改性大豆不溶性膳食纤维及其对铅的吸附研究[J]. 化工新型材料, 2022, 50(7): 183-187 DOI:10.19817/j.cnki.issn1006-3536.2022.07.038

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基金资助

国家大豆产业技术体系(CARS-04)

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