Research progress on the removal of pesticides in water by Fe3O4-based adsorbents in the past decade: A review
Shaoyang Sun, Xiaohan Meng, Ze Lv, Tianzhen Jiang, Qianwei Liang, Liyin Shi, Jianguo Feng
Abstract
There are large amounts of residual pesticide in water, which has caused serious environmental problems worldwide and poses a great threat to environmental organisms and human health. Thus, effectively removing pesticides from the water environment is important, among which adsorption has become a promising method due to its low cost, simple operation, rapidity, and convenience. Fe3O4-based adsorbents have attracted much attention due to their magnetic properties, rapid recovery, and various modification methods. This review summarizes various materials (inorganics, polymers, silica, metal-organic frameworks, multi-layer composites) used to construct Fe3O4-based adsorbents for pesticides removal from water environment. On this basis, the effects of adsorbent dosage, adsorption time, temperature, pH, and other factors on the adsorption capacity of Fe3O4-based adsorbents were discussed. The adsorption mechanism is generalized as follows: van der Waals forces, hydrogen bonds, electrostatic interactions, π-π interactions and hydrophobic interactions. Finally, the future challenges and perspectives of Fe3O4-based adsorbents for practical water purification are proposed.