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2025876 
Journal Article 
Treatment of nickel-ammonia complex ion-containing ammonia nitrogen wastewater 
Min Xiao-bo; Zhou Min; Chai Li-yuan; Wang Yun-yan; Shu Yu-de 
2009 
1 
Transactions of Nonferrous Metals Society of China
ISSN: 1003-6326 
19 
5 
1360-1364 
WOS:000270793600049 
Air stripping was adopted to treat nickel ammonia complex ion-containing wastewater in order to remove nickel and ammonia simultaneously in one technological process. The relationship among pH, the concentration of nickel ammonia complex ion and total ammonia concentration was analyzed theoretically. Influence of pH value, water temperature, airflow rate and time on air stripping was studied in detail by static experiment in laboratory. The results show that at pH 11, temperature of 60 degrees C and airflow rate of 0.12 m(3)/h, NH(3) and Ni(2+) concentrations remained in wastewater are less than 2 and 0.2 mg/L, respectively, after blowing for 75 min, which reaches the standard of the state discharge. When the tail gas is absorbed by 0.5 mol/L H(2)SO(4) in order to avoid the secondary pollution, the absorption rate can achieve 70%. 
air stripping; nickel ammonia complex ion; nickel ammonia wastewater