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Abstract
In this study, the removal of medium–low concentration ammonium–nitrogen () from waters and wastewaters on D113 resin was investigated with respect to pH, initial
concentration, temperature and contact time. The equilibrium of
on D113 resin reached in 20–30 min. The process of
removal by D113 resin fitted Langmuir isotherm well. The pseudo second-order kinetic and intra-particle diffusion models were used to investigate the kinetic data of
on D113 resin. The desorption solution can be returned to production after pretreatment. The mechanism of removal of
by D113 resin was coexistence of adsorption and cation exchange. When the dosage of D113 resin was 5 g L−1, pH 6, contact 30 min at room temperature, initial
concentration being 116 mg L−1 in rare earth metallurgical wastewater was reduced to 13 mg L−1 after adsorption treatment.
Acknowledgements
The authors would like to express their sincere appreciation to the anonymous reviewers for their helpful comments and suggestions.
Disclosure statement
No potential conflict of interest was reported by the authors.
Funding
The authors wish to gratefully acknowledge the financial supports from the National Science & Technology Pillar Project of People's Republic of China [2012BAC11B07], the Jiangxi Provincial Department of Education of China [GJJ14419] and [GJJ13430].