Abstract

An overview of the use of ash wastes from a combined heat and power (CHP) plant as secondary resources in various areas of industry and agriculture is given. The physicochemical and sorption properties of ash and slag from the Apatity CHP plant with respect to the \({\text{NH}}_{4}^{ + }\) ion were studied. It was established that the process of sorption is adequately described by the Langmuir equation of monomolecular adsorption. The capacity of an adsorption monolayer of the ash and slag of 20.43 mg \({\text{NH}}_{4}^{ + }\)/g, which is consistent with the values noted in international practice, and the adsorption equilibrium constant (0.0632 L/g) were calculated. It was shown that the sorption process is most accurately described by a pseudo-second-order kinetic model, and it proceeds in a mixed-diffusion mode involving not only the outer surface of the material but also the inner surface of its particles due to their porosity.

中文翻译：

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水溶液中铵离子对热电联产厂灰渣的吸附

摘要

概述了将热电联产 (CHP) 工厂产生的灰渣用作工业和农业各个领域的二次资源。研究了 Apatity 热电联产厂灰渣对\({\text{NH}}_{4}^{ + }\)离子的物理化学和吸附特性。已经确定吸附过程可以由单分子吸附的朗缪尔方程充分描述。灰渣单层吸附量为 20.43 mg \({\text{NH}}_{4}^{ + }\)/g，这与国际惯例中注明的值一致，并计算出吸附平衡常数（0.0632 L/g）。结果表明，吸附过程最准确地由准二级动力学模型描述，并且它以混合扩散模式进行，不仅涉及材料的外表面，还涉及其颗粒的内表面，因为它们的孔隙率。