Studies on the use of neem products for removal of ammonia from brackishwater.
Laboratory experiments were carried out to investigate the ammonia removal from brackishwater (Salinity 16 +/- 1 ppt) using natural plant products such as seed powder and seed oil from neem (Azadirachta indica) and commercially available neem products-neemazal and neemgold. The experimental results showed that ammonia removal was effective with 90 mg/l of neem oil, whereas, neem seed powder at 90 mg/l registered an increase in ammonia levels throughout the course of the experiment. Neem oil, neemazal, and neemgold at 90 mg/l were effective in decreasing the total ammonia nitrogen (TAN) level of 0.40-0.45 mg/l in 96 h. The effect of initial ammonia concentrations on the ammonia removal using neem oil revealed that percentage ammonia removal decreased with an increase in initial ammonia concentration.
Krishnani
K K
KK
Central Institute of Brackishwater Aquaculture, R. A. Puram, Chennai, India. krishnanik@hotmail.com
Gupta
B P
BP
Joseph
K O
KO
Muralidhar
M
M
Nagavel
A
A
D000641:Ammonia / Q000737:chemistry / Q000302:isolation & purification*; D031601:Azadirachta / Q000502:physiology*; D001673:Biodegradation, Environmental; D007700:Kinetics; D014873:Water Pollutants / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D014873:Water Pollutants; D000641:Ammonia