中文摘要：

采用纳米级硬硅钙石二次粒子处理焦化废水中的氨氮（NH3-N）。结果表明，硬硅钙石的吸附平衡时间为180min，吸附等温线分别符合Freundlich和Langmuir方程，即为qe=0.4345Ce^0.3269和qe=0.0745Ce/1＋0.0283Ce,计算单层吸附最大吸附量为2．6357mg·g^-1。与活性炭相比，当投加量为2．5g·100mL^-1时，NH3-N的平衡吸附量分别为1．35mg·g^-1和1．60mg·g^-1，去除率分别为45．55％和47．25％，一定程度上说明硬硅钙石的吸附性能优良。

英文摘要：

The xonotlite was used to treat ammonia nitrogen in the coking wastewater.Experimental results shown that xonotlite adsorption equilibrium time was 180 min,adsorption isotherm of xonotlite corresponds with Freundlich and Langmuir equation respectively. qe=0.4345Ce^0.3269 and qe=0.0745Ce/1＋0.0283Ce ,monolayer maximum NH3-N sorption capacity was 2.6357 mg.g^-1.Compared with activated carbon ,NH3-N adsorption capacity were 1.35mg.g^-1 and 1.60 mg·g^-1 respectively, removal rate were 45.55% and 47.25% when dosage was 2.5 g per 100 mL.