CAJ | 학술논문

以活性炭纤维负载Pd／Sn（4∶1）为电催化还原阴极，采用单因素实验与正交试验方法，研究了高浓度硝酸盐废水电催化还原处理过程中N O3－‐N去除量、N2选择率与电流、初始pH、初始硝酸盐浓度、溶液循环流速等的相关性，并优化了电催化还原工艺参数．实验结果表明，电流、电流与初始pH交互作用为NO3－‐N 去除的主要控制因素，电流、初始硝酸盐浓度为N2选择率的主要控制因素．电流＝0．68 A、pH＝6．4、初始硝酸盐浓度＝250 mg／L 为“脱硝产氮气”的最佳反应条件．在此条件下反应6 h ，N O 3－‐N从250 m g／L降至200 m g／L以下，N2‐N最大生成率超过48％，催化剂活性达到20 mg／（g · h）．
이활성탄섬유부재Pd／Sn（4∶1）위전최화환원음겁，채용단인소실험여정교시험방법，연구료고농도초산염폐수전최화환원처리과정중N O3－‐N거제량、N2선택솔여전류、초시pH、초시초산염농도、용액순배류속등적상관성，병우화료전최화환원공예삼수．실험결과표명，전류、전류여초시pH교호작용위NO3－‐N 거제적주요공제인소，전류、초시초산염농도위N2선택솔적주요공제인소．전류＝0．68 A、pH＝6．4、초시초산염농도＝250 mg／L 위“탈초산담기”적최가반응조건．재차조건하반응6 h ，N O 3－‐N종250 m g／L강지200 m g／L이하，N2‐N최대생성솔초과48％，최화제활성체도20 mg／（g · h）．
Activated carbon fiber loaded Pd/Sn (4∶1) was used as cathode in electrocatalytic reduction .Single factor and orthogonal experiments were employed to investigat the relation‐ships between nitrate removal ,nitrogen selectivity with current ,initial pH ,initial nitrate con‐centration and solution circulating velocity in high concentration nitrate wastewater ,and real‐ized optimum reaction condition .Results showed that the current ,interaction of current and initial pH were the major controlling factors of NO3 -‐N removal efficiency .The current and initial nitrate concentration were the major controlling factors of N2 selectivity .The optimiza‐ted reaction conditions were as follows :current 0 .68 A ,pH=6 .4 ,initial nitrate concentra‐tion 250 mg/L .In this conditions for 6 h ,the amount of NO3 -‐N removal from 250 mg/L to 200 mg/L ,maximum amount of N2‐N selectivity beyond 48% ,activity of electroeatalytic denitrification was 20 mg/(g · h) .