Excessive nitrate content in drinking groundwater is one of the sources of nitrate-nitrogen that threatens humanhealth all over the world. Nitrate-nitrogen reduction technology is categorized into membrane filtration, electro-dial-ysis, ion exchange, adsorption, chemical methods, and biological methods according to the principle of eliminationfrom water. In particular, an adsorption technique is the most popular and common process because of its cost effec-tiveness, convenience, and effective adsorption. In this review, the application of conventional adsorbents used toreduce nitrate-nitrogen from drinking water is discussed and novel technologies on nitrate-nitrogen removal are intro-duced. Furthermore, the recent development of novel nitrate-nitrogen adsorbents from biopolymers such as chitosanand agricultural and industrial byproducts is reviewed.

• 최경옥(세종대학교 식품공학과) | Kyeong-Ok Choi
• 서석진(세종대학교 식품공학과) | Seok Jin Seo
• 고상훈(세종대학교 식품공학과) | Sanghoon Ko Corresponding author