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摘要
以碳酸锰和碳酸氢钾为原料，在650℃高温条件下制备前驱体α-MnO2-K，再经3 mol/L NaCl处理制得铵离子筛α-MnO2-Na，将其造粒后用于市政污水连续脱铵，表现出很好的选择性、吸附容量和可再生性能，对水体中共存的钙、镁、钠离子很少吸附，对氨氮的吸附容量可达15 mg/g，产水氨氮质量浓度小于1 mg/L，能够循环利用500次以上。
Abstract
α-MnO2-K precursor is synthesized through the ion imprinting method at 650℃ with manganese carbonate and potassium bicarbonate as raw materials.Then α-MnO2-Na ammonium ion sieve (AIS),which exhibits high selectivity to NH4+,is obtained through treating α-MnO2-K by a 3 mol·L-1 NaCl solution.AIS after granulation is used for continuous removal of NH3-N from municipal wastewater,showing high selectivity,high adsorption capacity and satisfied recyclability.AIS can hardly adsorb coexistence ions in water,such as Ca2+,Mg2+ and Na+.Its adsorption capacity to NH3-N can reach 15 mg·g-1.Moreover,the concentration of NH3-N is less than 1 mg·L-1 in produced water.AIS can recycle more than 500 times.
关键词
铵离子筛
/
离子印记
/
选择性吸附
/
离子交换
/
氨氮处理
Key words
ammonium ion sieve
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ion imprinting
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selective adsorption
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ion exchange
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treatment of ammonia nitrogen
Author summay
莫恒亮(1988-),男,博士,研究方向为电化学水处理,mohengliang@sina.com
高选择性铵离子筛α-MnO2-Na的制备及应用研究[J].
, 2019, 39(6): 85-88,90 DOI:10.16606/j.cnki.issn0253-4320.2019.06.017
