期刊论文

中文

中南林业科技大学学报

1673-923X

2005

25

5

36-39,67

10.3969/j.issn.1673-923X.2005.05.020

株洲市科技局重点项目“水处理中生物介质过滤机理研究（2003-2）”；

本校为第一机构

为比较在高起始氨氮浓度C0点和介质用量W0点上,吸附理论通式Qe=W0qmC0/[qmKw+W0(qm-qe)+C0]与其简化方程Qe=W0qmC0/[qm(Kw+W0)+C0]的适用性,测定了给定pH值和温度条件下反应平衡时NH4Cl溶液中蛭石和人造沸石的氨氮吸附量(Qe).在该试验条件下确定的蛭石单位介质吸附容量qm和介质系数Kw值分别为22 mg/g和15.5 g/L,人造沸石的qm和Kw的值分别为45 mg/g和8 g/L.在整个试验氨氮浓度C0和介质用量W0范围内,用该通式描述两介质刘氨氮的等温吸附过程具有很高的精确度.而简化方程仅在有限范围内即C0相对小或W0相对大时才适用.若给定预测相对误差(RD),则C0/qm(Kw+W0)≤RD可作为简化方程应用的判别式.

Tests were conducted to measure the quantity of NH4^＋-N sorption at equilibrium （Qr） by vermiculite and synthetic zeolite minerals in NH4Cl solution under given pH and temperature eonditions with the objective to comparing the fitness of the general sorption equation Q=W0qmC0/[qm（Kw＋W0）＋C0] with that of the simplified form Q=W0qmC0/[qm（Kw＋W0）＋C0] at high initial NH4^＋-N concentration （C0） and sorbent quantity （W0） levels. The maximum sorption quantity per unit sorbent qm and the medium coefficient Kw. were found to be respective...