Yunnen Chen, Xiaoyan Luo, Changshi Xiong, Liming Liang
a School of Resource and Environmental Engineering , Jiangxi University of Science and Technology , 156 Kejia Ave., Ganzhou Jiangxi 341000 , People's Republic of China.
Environ Technol. 2015;36(18):2349-56. doi: 10.1080/21622515.2015.1027285. Epub 2015 Apr 9.
In this study, the removal of medium-low concentration ammonium-nitrogen ([Formula: see text]) from waters and wastewaters on D113 resin was investigated with respect to pH, initial [Formula: see text] concentration, temperature and contact time. The equilibrium of [Formula: see text] on D113 resin reached in 20-30 min. The process of [Formula: see text] 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 [Formula: see text] on D113 resin. The desorption solution can be returned to production after pretreatment. The mechanism of removal of [Formula: see text] 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 [Formula: see text] concentration being 116 mg L(-1) in rare earth metallurgical wastewater was reduced to 13 mg L(-1) after adsorption treatment.
本研究考察了D113树脂对水和废水中中低浓度铵氮（[化学式：见原文]）的去除效果，研究了pH值、初始[化学式：见原文]浓度、温度和接触时间等因素的影响。D113树脂对[化学式：见原文]的吸附平衡在20 - 30分钟内达到。D113树脂去除[化学式：见原文]的过程符合Langmuir等温线。采用准二级动力学模型和颗粒内扩散模型研究了D113树脂对[化学式：见原文]的动力学数据。解吸液经预处理后可返回生产流程。D113树脂去除[化学式：见原文]的机制为吸附和阳离子交换共存。当D113树脂投加量为5 g L(-1)、pH值为6、室温下接触30分钟时，稀土冶金废水中初始[化学式：见原文]浓度为116 mg L(-1)，经吸附处理后降至13 mg L(-1)。
