Department of Chemical Engineering, Malaviya National Institute of Technology, Jaipur, 302017, India.
Environ Sci Pollut Res Int. 2022 Dec;29(57):86439-86467. doi: 10.1007/s11356-022-20941-4. Epub 2022 Jun 11.
Calcium, with its excellent adsorptive property and higher permissible limits in the environment, emerges as an effective wastewater treatment earth metal. Most of the catalysts, photocatalysts, and adsorbents reported in the literature have heavy metal complex, which creates a leaching problem. Majorly, precursors used for the synthesis of heterogeneous catalysts for wastewater treatment are costly. Therefore, the use of such precursors would be not suitable and feasible approach from an economic point of view. This review work is focused on giving an overview of the utilisation of calcium-based catalysts (adsorbents and photocatalyst) for the removal/degradation of various types of dye water pollutants and summarises the reported effects of calcium as a base on the removal efficiency of dopants. In this article, an extensive literature survey is presented on the various photocatalysts developed and the different syntheses involved in their preparation. As the utilisation of marble powder is a green sustainable approach, the scope of various calcium-based photocatalysts and their application is presented. This article also aims for the elementary and inclusive determination of the effect of introducing calcium as a base for different catalysts and adsorbents.
钙具有极好的吸附性能和在环境中更高的允许限度，是一种有效的废水处理金属。文献中报道的大多数催化剂、光催化剂和吸附剂都含有重金属复合物，这会造成浸出问题。用于废水处理的多相催化剂合成的主要前体是昂贵的。因此，从经济角度来看，使用这种前体不是合适和可行的方法。这项综述工作重点介绍了钙基催化剂（吸附剂和光催化剂）在去除/降解各种类型的染料水污染物方面的应用，并总结了钙作为基底对掺杂剂去除效率的影响。本文对已开发的各种光催化剂及其制备中涉及的不同合成方法进行了广泛的文献综述。由于大理石粉末的利用是一种绿色可持续的方法，因此介绍了各种基于钙的光催化剂及其应用。本文还旨在初步和全面地确定引入钙作为不同催化剂和吸附剂的基底的效果。
