▎ 摘　　要

This study is aimed to explore highly efficient water desalination and disinfection using a new capacitive deionization (CDI) system. The novel nanocomposite based on graphene oxide was synthesized and grafted five generations of dendrimer and silver nanoparticles; subsequently, the CDI electrodes were coated by the new nanocomposite. The introduced nanocomposite was characterized using Fourier-transform infrared spectrometry, thermogravimetric analysis, Brunauer-Emmett- Teller surface area analysis, surface wettability, and field emission scanning electron microscopy. Different affecting parameters, including total dissolved solids (TDS) (500-20,000 mg L-1), number of coliforms (500-100,000 MPN), different amounts of silver nanoparticles (0.2% and 5%), and contact time (15-120 min) were evaluated. The new electrodes can be converted to TDS from 20,000 to 400 mg L-1. Thus, the new electrodes with an electrosorption capacity of 46.29 mg g(-1) presented 98% ion removal in saltwater treatment. The CDI system can also kill 99.9% of coliforms in the NaCl solution (500 mg L-1) containing 1,000; 10,000; 100,000 MPN of coliforms within 30, 60, and 120 min, respectively. Moreover, the coliform removal performance was successful in high TDS water (5,000 mg L-1). The new nanocomposite indicated high adsorption/desorption capacity in alternating cycles and regeneration quickly, which makes it an excellent candidate in the continuous process.