CAJ | 학술논문

以红壤为吸附剂,研究了固/液吸附体系中红壤对磷的吸附特性,探讨了温度和pH对红壤吸附磷的影响.结果表明,红壤对磷的等温吸附数据与Langmuir和Freundlich方程的拟合优度较高,当温度为30℃时,红壤对磷的饱和吸附量高达1.61 mg/g,说明红壤是一种优良的磷素吸附材料;红壤对磷的吸附量在吸附初期随吸附时间急剧上升而后期趋于稳定,当磷的初始浓度为25～100 mg/L时,12 h时的吸附量均可达到平衡吸附量的90%以上;当磷的初始浓度<50 mg/L时,温度对红壤吸附磷基本无影响,但随着磷初始浓度的升高,温度对红壤吸附磷的影响渐趋明显;在所检测的试验体系中,pH值为4～8时对红壤吸附磷无明显影响.
이홍양위흡부제,연구료고/액흡부체계중홍양대린적흡부특성,탐토료온도화pH대홍양흡부린적영향.결과표명,홍양대린적등온흡부수거여Langmuir화Freundlich방정적의합우도교고,당온도위30℃시,홍양대린적포화흡부량고체1.61 mg/g,설명홍양시일충우량적린소흡부재료;홍양대린적흡부량재흡부초기수흡부시간급극상승이후기추우은정,당린적초시농도위25～100 mg/L시,12 h시적흡부량균가체도평형흡부량적90%이상;당린적초시농도<50 mg/L시,온도대홍양흡부린기본무영향,단수착린초시농도적승고,온도대홍양흡부린적영향점추명현;재소검측적시험체계중,pH치위4～8시대홍양흡부린무명현영향.
The phosphorus adsorption characteristics of red soil in solid-liquid adsorption system were studied, and the influence of temperature and pH on the phosphorus adsorption was discussed. The results indicate that the isothermal adsorption data fit well with the Langmuir and Freundlich models. The saturated adsorption capacity of phosphorus can reach 1.61 mg/g when the temperature is 30 ℃, indicating that the red soil is a good adsorbent material for removing phosphorus. The phosphorus adsorption quantity increases rapidly with time in the initial period and then approaches to a constant level in the later period. When the initial phosphorus concentration is 25 to 100 mg/L, the phosphorus adsorption quantity can reach over 90% of the equilibrium adsorption quantity within 12 h. The influence of temperature on phosphorus adsorption is negligible when the initial phosphorus concentration is less than 50 mg/L.The influence of pH of 4 to 8 on phosphorus adsorption is not significant in the test sample system.