Developing cellulose-based hydrophobic/hydrophilic composites for efficient adsorption of oils and heavy metals from water

被引:4
作者
Yin, Fengqin [1 ]
Zhou, Dianli [1 ]
Mo, Yeling [1 ]
Zhu, Junjie [1 ]
Zhang, Yunyan [2 ]
Cao, Hui [1 ]
Yuan, Min [1 ]
Ye, Tai [1 ]
Xu, Fei [1 ]
机构
[1] Univ Shanghai Sci & Technol, Shanghai Engn Res Ctr Food Rapid Detect, Sch Hlth Sci & Engn, Shanghai 200093, Peoples R China
[2] Zhejiang Univ, Sch Micronanoelect, Hangzhou 311200, Peoples R China
基金
中国国家自然科学基金;
关键词
HHC; Cellulose and hollow carbon microspheres; Heavy metal ions; Oil; Efficient and rapid adsorption; HOLLOW CARBON MICROSPHERES; REMOVAL;
D O I
10.1016/j.scitotenv.2024.172422
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The oily wastewater and heavy metal ions have been increasingly discharged into water environment, posting a serious threat to ecosystems and human health. However, it remains challenging to use single separation technology to effectively remove oil and heavy metal ions in oil-water mixtures simultaneously. Herein, novel hydrophobic/hydrophilic composites (HHC) were successfully prepared by using A4 paper-derived hydrophilic cellulose as the modified matrix, modifying the polydopamine layer and in-situ growth nanoscale zero-valent iron as active adsorption materials, combined with oleic acid-modified hydrophobic magnetic hollow carbon microspheres, which were used to efficiently and rapidly adsorb heavy metals and oil in oil-water mixtures. Under the optimal adsorption conditions, the adsorption amounts of As(III), As(V), Pb(II) and Cu(II) were 289.6 mg/g, 341.9 mg/g, 241.2 mg/g and 277.5 mg/g, respectively, and the mass transfer rate of HHC to the target ions is fast. The HHC have efficient separation performance for layered oil-water mixtures and emulsified oilwater mixtures, with separation efficiency of 97 % and 92 %. At the same time, due to the abundant adsorption sites, the HHC also exhibit splendid regeneration performance for the four ions after multiple adsorption utilization. Our work designed a approach to achieving promising oil and heavy metal adsorbents with higher adsorption capacity and better regenerative properties.
引用
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页数:11
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