CAJ | 학술논문

湿地中基质的吸附与转化是磷去除的主要途径，强化湿地基质对磷的吸附能力是提高磷去除率的关键所在。研究以云南罗时江河口湿地的基质为实验对象，考察了三种固磷试剂（FeCl3、AlCl3、CaCl2）对基质磷吸附性能的强化效果。结果表明，FeCl3和AlCl3的施用比 CaCl2更明显有效地增加了基质磷的吸附能、最大吸附容量、最大缓冲容量，同时更大幅度地降低了基质磷平衡浓度（EPC0），从而赋予基质更强的从水相中吸附磷的能力。在同处最低使用剂量时，投加 FeCl3降低 EPC0值的幅度大于 AlCl3，而 AlCl3对其他吸附参数的提升高于 FeCl3。
습지중기질적흡부여전화시린거제적주요도경，강화습지기질대린적흡부능력시제고린거제솔적관건소재。연구이운남라시강하구습지적기질위실험대상，고찰료삼충고린시제（FeCl3、AlCl3、CaCl2）대기질린흡부성능적강화효과。결과표명，FeCl3화AlCl3적시용비 CaCl2경명현유효지증가료기질린적흡부능、최대흡부용량、최대완충용량，동시경대폭도지강저료기질린평형농도（EPC0），종이부여기질경강적종수상중흡부린적능력。재동처최저사용제량시，투가 FeCl3강저 EPC0치적폭도대우 AlCl3，이 AlCl3대기타흡부삼수적제승고우 FeCl3。
Enhancing phosphorus adsorption on sediments is critical for improvement of the phosphorus removal efficiency in wetland. Sedi-ments from Luoshijiang River wetland in Yunnan Province were used to examine the effects of different phosphorus-fixing agents(FeCl3, AlCl3 and CaCl2)on improving phosphorus adsorption on the sediments. Adsorption data were fitted by Langmuir and modified Freundlich isotherms. Addition of phosphorus-fixing agents increased adsorption energy(K), maximum adsorption capacity(Qm), and maximum buffer-ing capacity(MBC), but decreased equilibrium phosphorus concentration(EPC0). FeCl3 and AlCl3 had greater effects than CaCl2 did. When the agents were added at a rate of double P amount, EPC0 was 0.000 3 mg·L-1, 0.003 mg·L-1 and 0.049 mg·L-1 for FeCl3, AlCl3 and CaCl2 treatment, respectively, which were 99.8%, 98.2% and 66.8% reduction of the initial phosphorus concentrations. The findings indicate that applying phosphorus-fixing agents could enhance phosphorus adsorption by sediments and improve phosphorus removal from water.