Eggshell waste as a promising adsorbent for phosphorus recovery from wastewater: A review

IF 5.1 Q1 ENVIRONMENTAL SCIENCES

Water Biology and Security Pub Date : 2025-01-01 DOI:10.1016/j.watbs.2024.100319

Protima Sarker , Xin Liu , Md Shiblur Rahaman , Masahiro Maruo

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Abstract

Phosphorus is a plant nutrient that is the main driving force of eutrophication, a serious type of water pollution. Various techniques and materials have been used to identify cost-effective, environmentally friendly options for phosphate removal. Eggshell waste is a good natural source of calcium, which is an effective adsorbent for phosphate removal. Many studies have examined pure eggshell, eggshell chemically modified with metal salts, and calcined eggshell mixed with biochar for phosphate removal. Here, most research on eggshell-based phosphate removal is reviewed to clarify the effectiveness of different types of modifications. Adsorption isotherm and kinetics models are the best methods for identifying the mechanism of adsorption, and both pure and modified eggshell have been characterized to understand the morphological and structural changes after adsorption. Furthermore, the phosphate-loaded material could be used as a fertilizer if it is not modified with harmful or toxic material. Eggshell-based adsorbents may provide cheaper, ecofriendly adsorbents for phosphate removal.

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蛋壳废料作为一种有前途的废水磷吸附剂的研究进展

磷是一种植物养分，是水体富营养化的主要驱动力，是水体污染的一种严重类型。各种技术和材料已被用于确定成本效益高、环境友好的磷酸盐去除方案。蛋壳废物是钙的良好天然来源，是一种有效的除磷吸附剂。许多研究已经检验了纯蛋壳、金属盐化学改性蛋壳和煅烧蛋壳与生物炭混合去除磷酸盐。本文综述了蛋壳基磷酸盐去除的大多数研究，以阐明不同类型修饰的有效性。吸附等温线和动力学模型是确定吸附机理的最佳方法，对纯蛋壳和改性蛋壳进行了表征，以了解吸附后的形态和结构变化。此外，如果不添加有害或有毒物质，载磷材料可以用作肥料。蛋壳基吸附剂可能为磷酸盐去除提供更便宜、更环保的吸附剂。

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来源期刊

Water Biology and Security

CiteScore

4.10

自引率

0.00%

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