This study focuses on exploiting the main component of traditional nickel metallurgical waste for use as a valuable material that can be applied in the removal of organic amines from water systems. Silicon compounds from metallurgic waste were converted into dissolvable sodium silicate by roasting the waste with alkali. Silica with adsorption capacity was combined with magnetic NiFe cores by the carbonation decomposition of purified silicate solution. The composite magnetic adsorbent was characterized, and its adsorption mechanism for organic amines was investigated. The effects of the initial trimethylamine concentration, contact time and temperature on the adsorption efficiency of the composite adsorbent towards trimethylamine were investigated. It was found that the adsorption fit the Freundlich mode well. The adsorption kinetics can be described by a pseudo-second-order kinetic model. The adsorption capacity reached 55.8 μg/mg at 293 K. The use of metallurgical waste to prepare the magnetic composite adsorbent has three advantages, which include benefiting the environment by reducing the amount of solid waste and costs associated with constructing and maintaining storage facilities, generating valuable products in an economical manner and conveniently recycling used adsorbents to avoid secondary pollution.

这项研究的重点是利用传统镍冶金废料的主要成分，将其作为有价值的材料，可用于从水系统中去除有机胺。冶金废料中的硅化合物通过用碱焙烧而转化为可溶解的硅酸钠。通过纯化硅酸盐溶液的碳化分解，将具有吸附能力的二氧化硅与磁性NiFe磁芯结合。对复合磁性吸附剂进行了表征，研究了其对有机胺的吸附机理。研究了初始三甲胺浓度，接触时间和温度对复合吸附剂对三甲胺的吸附效率的影响。发现该吸附很好地适合于弗氏模式。吸附动力学可以通过拟二级动力学模型来描述。在293 K时的吸附容量达到55.8μg/ mg。使用冶金废料制备磁性复合吸附剂具有三个优点，其中包括通过减少固体废料的量来保护环境以及与建设和维护存储设施，发电相关的成本以经济的方式获得有价值的产品，并方便地回收使用过的吸附剂，以避免二次污染。