Ding Wenming, Huang Xia, Zhang Liping
ESPC State Key Joint Laboratory, Dept. of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2003 Sep;24(5):110-3.
Aiming at the development of novel efficient absorbents for phosphorus removal from wastewater, metal hydrates (MeH) were selected as adsorbent material. Several kinds of MeH were tested for phosphorus adsorption, and lanthanum hydrate (LaH) was found to possess a high adsorption capacity. Corresponding to solution pH change, LaH' s adsorption capacity changed largely, and at about pH = 3 reached the peak. Its adsorption isotherm accorded prefer Langmuir's to Fruendrich's equations. Influences of different anions on its adsorption capacity were tested. This adsorbent was effective to adsorb orthophosphate but limited to remove polyphosphoric anion. The experimental results demonstrated that the LaH adsorbent was superior to traditional activated alumina adsorbent in adsorption performance.
为了开发新型高效的废水除磷吸附剂，选择金属水合物（MeH）作为吸附材料。测试了几种MeH对磷的吸附性能，发现水合镧（LaH）具有较高的吸附容量。随着溶液pH值的变化，LaH的吸附容量变化很大，在pH约为3时达到峰值。其吸附等温线更符合朗缪尔方程而非弗伦德里希方程。测试了不同阴离子对其吸附容量的影响。这种吸附剂对吸附正磷酸盐有效，但对去除多聚磷酸阴离子的效果有限。实验结果表明，LaH吸附剂在吸附性能上优于传统的活性氧化铝吸附剂。
