本文選題：離子型稀土礦區(qū) + 埃洛石　； 參考：《Transactions of Nonferrous Metals Society of China》2017年07期

【摘要】：中國南方離子型稀土礦區(qū)土壤氨氮污染日趨嚴重。埃洛石是礦區(qū)土壤的主要粘土成分之一。研究了埃洛石對氨氮的飽和吸附量、吸附影響因素及其吸附動力學特點。結果表明:在T=303 K、p H=5.6條件下,氨氮初始濃度增至600 mg/L左右(接近原地浸礦工藝實際使用的最初浸礦劑濃度的1/2)時,埃洛石和礦區(qū)土壤對氨氮的吸附達飽和,飽和吸附量為1.66 mg/g左右;隨NH_4~+-N初始濃度、p H值(3.0~6.0)、溫度(288~313 K)的升高,埃洛石及礦區(qū)土壤對氨氮的吸附量增大;埃洛石對氨氮的吸附符合Langmuir等溫方程和Freundlich等溫方程,可近似認為離子型稀土礦區(qū)土壤對氨氮的吸附易于進行;埃洛石對氨氮的吸附過程符合準二級動力學方程。
[Abstract]:The pollution of ammonia nitrogen in the soil of the ion-type rare earth mining area in South China is becoming increasingly serious. It is one of the main clay components in the soil of the mining area. The saturated adsorption capacity of ammonia nitrogen, the influence factors and the adsorption kinetics of the ammonia nitrogen are studied. The results show that the initial concentration of ammonia nitrogen is increased to about 600 mg/L under the condition of T=303 K and P H=5.6. When the initial leaching concentration of 1/2 in the mining process was used, the adsorption of ammonia nitrogen was saturated in the soil of the rock and mine, and the saturated adsorption amount was about 1.66 mg/g; with the initial concentration of NH_4~+-N, P H value (3.0~6.0), the temperature (288~313 K), the adsorption capacity of the soil to ammonia nitrogen increased and the adsorption character of the ammonia nitrogen in the soil of the rock and ore area increased. The isothermal equation of Langmuir and the equation of Freundlich isotherm can approximate the adsorption of ammonia nitrogen in the soil of the ion type rare earth mining area, and the adsorption process of the NH3 to the ammonia nitrogen is in accordance with the quasi two order kinetic equation.
【作者單位】： 中南大學冶金與環(huán)境學院;江西理工大學冶金與化學工程學院;
【基金】：Project(51674305)supported by the National Natural Science Foundation of China Project(1602FKDC007)supported by Science and Technology Program of Gansu Province,China Project(NSFJ2015-K06)supported by the Jiangxi University of Science and Technology,China
【分類號】：O647.3;X505

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