Bamboo Nanocellulose/Montmorillonite Nanosheets/Polyethyleneimine Gel Adsorbent for Methylene Blue and Cu(II) Removal from Aqueous Solutions.
Xuelun ZhangFeng LiXiyu ZhaoJiwen CaoShuai LiuYou ZhangZihui YuanXiaobo HuangCornelis F De HoopXiaopeng PengXingyan HuangPublished in: Gels (Basel, Switzerland) (2023)
In recent years, the scarcity of pure water resources has received a lot of attention from society because of the increasing amount of pollution from industrial waste. It is very important to use low-cost adsorbents with high-adsorption performance to reduce water pollution. In this work, a gel adsorbent with a high-adsorption performance on methylene blue (MB) and Cu(II) was prepared from bamboo nanocellulose (BCNF) (derived from waste bamboo paper) and montmorillonite nanosheet (MMTNS) cross-linked by polyethyleneimine (PEI). The resulting gel adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (SEM), X-ray photoelectron spectroscopic (XPS), etc. The results indicated that the MB and Cu(II) adsorption capacities of the resulting gel adsorbent increased with the solution pH, contact time, initial concentration, and temperature before equilibrium. The adsorption processes of MB and Cu(II) fitted well with the fractal-like pseudo-second-order model. The maximal adsorption capacities on MB and Cu(II) calculated by the Sips model were 361.9 and 254.6 mg/g, respectively. The removal of MB and Cu(II) from aqueous solutions mainly included electrostatic attraction, ion exchange, hydrogen bonding interaction, etc. These results suggest that the resulting gel adsorbent is an ideal material for the removal of MB and Cu(II) from aqueous solutions.
Keyphrases
- aqueous solution
- heavy metals
- electron microscopy
- high resolution
- wound healing
- magnetic resonance imaging
- heart rate
- hyaluronic acid
- magnetic resonance
- working memory
- metal organic framework
- health risk assessment
- human health
- quantum dots
- mass spectrometry
- molecular dynamics simulations
- resistance training
- drinking water
- reduced graphene oxide