Abdelzaher M A
Environmental Science and Industrial Development Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni Suef, 62511 Egypt.
Appl Nanosci. 2023 Jan 25:1-16. doi: 10.1007/s13204-023-02766-w.
The COVID-19 pandemic significantly impacts the increase in plastic waste from food packaging, masks, gloves, and personal protective equipment (PPE), resulting in an environmental disaster, if collected, processed, transported, or disposed inappropriately. Plastic waste has a very long deterioration time in the environment (soil and water), cheap, and plentiful. Additionally, construction waste disposal is a process that transfers debris to a state that does lead to any sustainable or environmental problems. The core objective of this current research work is to provide safety and efficacy by partial substitution of both ultrafine demolition waste (UDW), incorporated with nanoplastic waste (NPW), for eco-white cement (E-WC) composition. E-WC is designed by partially substituted WC with UDW (1.0, 5.0, 10.0, 15.0, and 20.0 wt.%); incorporated with NPW (1.0 and 3.0 wt.%); to adequately protect people and the environment over long periods. The context examines the high performance, physicomechanical properties and high durability of blends as presences of silica in UDW proposed a hydraulic filler material, plus; high surface area of NPW. The microstructure and workability are characterized by X-Ray Fluorescence (XRF), Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM) measurements. The record results show greatly enhanced in the mechanical strength due to the combination of NPW and UDW (active silica). With the presence of NPW and UDW in WC matrix, the highest level of crystallization formed consequently a decrease in whiteness reflection (Ry) and total porosity. In summary, WC blend with NPW and UDW reflects better workability and energy saving qualities, which are economical and environmentally beneficial and may result in decreased construction budget and improve a long-term raw material sustainability.
新冠疫情严重影响了食品包装、口罩、手套及个人防护装备（PPE）产生的塑料垃圾的增加，如果收集、处理、运输或处置不当，将导致环境灾难。塑料垃圾在环境（土壤和水）中的降解时间很长，价格便宜且数量众多。此外，建筑垃圾处置是一个将碎片转化为不会导致任何可持续性或环境问题状态的过程。当前这项研究工作的核心目标是，通过用掺入纳米塑料垃圾（NPW）的超细拆除垃圾（UDW）部分替代生态白水泥（E-WC）成分，来提供安全性和有效性。E-WC的设计是用UDW（1.0、5.0、10.0、15.0和20.0重量%）部分替代白水泥（WC）；掺入NPW（1.0和3.0重量%）；以便在长时间内充分保护人类和环境。本文探讨了混合物的高性能、物理力学性能和高耐久性，因为UDW中二氧化硅的存在使其成为一种水硬性填充材料，另外；NPW的高表面积也有此作用。通过X射线荧光（XRF）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）测量对微观结构和工作性能进行了表征。记录结果表明，由于NPW和UDW（活性二氧化硅）的结合，机械强度大大提高。在WC基体中存在NPW和UDW时，形成的结晶水平最高，因此白度反射率（Ry）和总孔隙率降低。总之，含有NPW和UDW的WC混合物具有更好的工作性能和节能特性，既经济又环保，可能会降低建筑预算并提高长期原材料的可持续性。
