TY - JOUR
T1 - Nanocomposite hydrogel engineered hierarchical membranes for efficient oil/water separation and heavy metal removal
AU - Yan, Linlin
AU - Yang, Xiaobin
AU - Zeng, Haoze
AU - Zhao, Yuanyuan
AU - Li, Yangxue
AU - He, Xuezhong
AU - Ma, Jun
AU - Shao, Lu
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/2/15
Y1 - 2023/2/15
N2 - The contaminants of oily sewage and heavy metal ions have been increasingly released into the aquatic environment, which causes a severe threat to both ecosystem and human health. However, it is still difficult to use a single separation technology to effectively deal with such a complex hazardous system to ensure the water safety and environmental remediation. Herein, a novel nanocomposite hydrogel-coated membrane was designed by one-step dip-coating of tannic acid (TA)/sodium alginate (SA)/3-aminopropyltriethoxysilane (APTES) co-depositing strategy, which combines the robust adhesion of TA, the hierarchical architecture induced by APTES and the strong hydration ability of SA. The as-prepared membrane exhibits excellent hydrophilicity and underwater superoleophobicity, which achieves efficient separation for various oil/water emulsions and outstanding anti-oil fouling performance. Meanwhile, the excellent heavy metal adsorption capacity was realized due to the abundant adsorption sites (-COO-, –NH2 and phenolic hydroxyl) and large surface area caused by hierarchical structures. Most interestingly, the fabricated membrane also presented strong chemical stability over a wide pH range 3–11, high salt tolerance and good resistance to anhydrous ethanol corrosion. The designed superwetting membranes show great potential for the purification of oil/water emulsion and the removal of heavy metal ions to effectively remediate the aquatic environment by the concept of ‘killing two birds by one stone’.
AB - The contaminants of oily sewage and heavy metal ions have been increasingly released into the aquatic environment, which causes a severe threat to both ecosystem and human health. However, it is still difficult to use a single separation technology to effectively deal with such a complex hazardous system to ensure the water safety and environmental remediation. Herein, a novel nanocomposite hydrogel-coated membrane was designed by one-step dip-coating of tannic acid (TA)/sodium alginate (SA)/3-aminopropyltriethoxysilane (APTES) co-depositing strategy, which combines the robust adhesion of TA, the hierarchical architecture induced by APTES and the strong hydration ability of SA. The as-prepared membrane exhibits excellent hydrophilicity and underwater superoleophobicity, which achieves efficient separation for various oil/water emulsions and outstanding anti-oil fouling performance. Meanwhile, the excellent heavy metal adsorption capacity was realized due to the abundant adsorption sites (-COO-, –NH2 and phenolic hydroxyl) and large surface area caused by hierarchical structures. Most interestingly, the fabricated membrane also presented strong chemical stability over a wide pH range 3–11, high salt tolerance and good resistance to anhydrous ethanol corrosion. The designed superwetting membranes show great potential for the purification of oil/water emulsion and the removal of heavy metal ions to effectively remediate the aquatic environment by the concept of ‘killing two birds by one stone’.
KW - Anti-oil-fouling
KW - Oil/water separation
KW - Pb adsorption
KW - Superwetting membrane
KW - Water treatment
UR - http://www.scopus.com/inward/record.url?scp=85144030873&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2022.121243
DO - 10.1016/j.memsci.2022.121243
M3 - 文章
SN - 0376-7388
VL - 668
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 121243
ER -
