A novel aminated polymeric adsorbent for removing refractory dissolved organic matter from landfill leachate treatment plant.
Refractory dissolved organic matter (DOM) from landfill leachate treatment plant was with high dissolved organic carbon (DOC) content. An aminated polymeric adsorbent NDA-8 with tertiary amino groups and sufficient mesopore was synthesized, which exhibited high adsorption capacity to the DOM (raw water after coagulation). Resin NDA-8 performed better in the uptake of the DOM than resin DAX-8 and A100. Electrostatic attraction was considered as the decisive interaction between the adsorbent and adsorbate. Special attention was paid to the correlation between porous structure and adsorption capacity. The mesopore of NDA-8 played a crucial role during uptake of the DOM. In general, resin in chloride form performed a higher removal rate of DOC. According to the column adsorption test, total adsorption capacity of NDA-8 was calculated to 52.28 mg DOC/mL wet resin. 0.2 mol/L sodium hydroxide solution could regenerate the adsorbent efficiently.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China. zhanglong48@sohu.com
Long
L
Zhang
Aimin
A
Li
Jinnan
J
Wang
Yufei
Y
Lu
Youdong
Y
Zhou
D000327:Adsorption; D000586:Amination; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D011108:Polymers / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D011108:Polymers; D014874:Water Pollutants, Chemical