摘要
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 colunm 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.
基金
supported by the Hi-Tech Re-search and Development Program(863)of China(No.2006AA06Z283)
the National Natural Science Foundation of China(No.50778088)
the Sino-Germany Scientific and Technical Cooperation Project of Jiangsu Province(No.BZ2007020)
