Preparation of Sodium Lignosulfonate/Chitosan Adsorbent and Application of Pb2+ Treatment in Water

被引:19
作者
Pan, Jie [1 ]
Zhu, Jiangwei [2 ]
Cheng, Fulong [1 ]
机构
[1] Chongqing Three Gorges Univ, Key Lab Water Environm Evolut & Pollut Control Th, Chongqing 404100, Peoples R China
[2] Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern Chin, Nanjing 210037, Peoples R China
关键词
chitosan; lignosulfonate; adsorbent; orthogonal optimization; HEAVY-METAL IONS; ADSORPTION; COMPOSITE; REMOVAL; PB(II); HYDROGEL; PERFORMANCE; EFFICIENT; CADMIUM; BIOCHAR;
D O I
10.3390/su13052997
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Industrial wastewater has brought huge disasters to water resources and soil and has seriously affected the growth of animals and plants. There is an urgent need for a green and efficient adsorbent to solve the problem of water pollution. Sodium lignosulfonate and chitosan undergo free radical polymerization to form a lignin/chitosan adsorbent, which is used to treat Pb2+ in water pollution. An orthogonal experiment was used to optimize the content of sodium lignosulfonate, chitosan, cross-linking agent and initiator to obtain the adsorbent with the best adsorption performance. The adsorbents were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermal analysis and zeta potentiometry. The influence of different conditions on the adsorption of heavy metal ions by lignosulfonate/chitosan adsorbent was explored, and a kinetic and isotherm model was established. The results showed that the adsorption capacity of Pb2+ was 345 mg g(-1) when the adsorbent was 0.01 g, the concentration of heavy metal ions was 100 mg L-1 and pH was 7. The adsorption process of lignosulfonate/chitosan is a kind of spontaneous adsorption mode, which is mainly composed of electrostatic adsorption and chemical adsorption.
引用
收藏
页码:1 / 14
页数:13
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