Abstract:

Through a series of simulation tests on soluble Nitrogen and Phosphorus in polluted water, the removing study according to the different sorts and amounts of six clay minerals including activated carbon,,kaoline, synthetic zeolite, vermiculite, perlite and montmorillonite was carried out. Correspondingly ,The percent of removing the ammonium nitrogen is 1%，4%，78%，11%，2%，26%；The percent of removing the nitrate nitrogen is 32%，6%，4.5%，3.6%，0.8%，56%；; The percent of removing the soluble phosphorus is 35%，-22%，9%，11.7%，3.6%，16.8%. The results showed that the synthetic zeolite is the best flocculating agent for ammonium nitrogen, Activated Carbon is the best flocculating agent for nitrate nitrogen and soluble phosphorus. Integrated removal efficiency and economic benefits, removing the ammonium nitrogen, the best concentration of the synthetic zeolite is 1.5g /l, the unit amount of adsorption is 11.8mg/g，the adsorption rate is 59%.For removing the nitrate nitrogen , the best concentration of the activated carbon is 12g /l , the best concentration of the activated carbon is 12g /l, the unit amount of adsorption is 0.108mg/g，the adsorption rate is 51%.For removing the soluble phosphorus, the best concentration of the activated carbon is 12g /l and 2.0 g / l, the unit amount of adsorption is 0.26mg/g，the adsorption rate is 26%.