Study on the Ammonia-Nitrogen Wastewater Treatment by Ocean Manganese Nodules

摘要

The ability of the ocean manganese nodules to treat thernammonia-nitrogen wastewater has been assessed. Factors such asrnadsorption time, temperature, initial NH4rn+ concentration, solid to liquidrnratio and pH value, were investigated，respectively. The absorptionrnisotherm also was obtained. Under the conditions of temperature 20 ℃，rntime 24 hours, particle size -200 mesh accounting for 82.6%, NH_4~rn+rnconcentration 375.4 mg/L, solid to liquid ratio 100:1 and solution pH 6,rnthe absorption amount of NH_4~rn+ on per gram of manganese nodules wasrnup to 20.43 mg.