Department of Environment, College of Architecture and Environment, Sichuan University, No. 24, South Section One, First Ring Road, Chengdu, Sichuan, 610065, China.
Department of Environment, College of Architecture and Environment, Sichuan University, No. 24, South Section One, First Ring Road, Chengdu, Sichuan, 610065, China.
Environ Res. 2020 Apr;183:109218. doi: 10.1016/j.envres.2020.109218. Epub 2020 Feb 3.
Increasing discharge of excessive phosphorus (P) has caused widespread eutrophication and water pollution that threaten both ecological and human health. There are many ways to remove P from eutrophic water, but there are various deficiencies. Conventional P removal is based largely on the use of Al or Fe salts and few methods can be directly used in field eutrophic water. Our research revealed that direct use of ordinary Portland cement could effectively remove P from eutrophic water bodies. Laboratory experiments indicate that a one-time application of cement reduced Total Phosphorus (TP) concentration of both eutrophic urban water and synthetic solutions to below 0.2 mg/L. A second application further reduced TP to below 0.04 mg/L. Use of cement also caused an increase in dissolved oxygen (DO) content in samples. Cement was directly used in eutrophic water body of a river and TP concentration was reduced to an allowable level. Use of readily available cement can contribute to the clean up of water pollution in developing countries. This study provides an innovative and easy solution to widespread eutrophication.
过量磷 (P) 的排放导致了广泛的富营养化和水污染，威胁到生态和人类健康。有许多方法可以从富营养化水中去除 P，但都存在各种缺陷。传统的 P 去除方法主要基于使用 Al 或 Fe 盐，很少有方法可以直接用于野外富营养化水。我们的研究表明，普通硅酸盐水泥的直接使用可以有效地从富营养化水体中去除 P。实验室实验表明，一次应用水泥可将富营养化城市水和合成溶液中的总磷 (TP) 浓度降低到 0.2mg/L 以下。第二次应用进一步将 TP 降低到 0.04mg/L 以下。水泥的使用还导致样品中溶解氧 (DO) 含量的增加。水泥直接用于河流富营养化水体，TP 浓度降低到允许水平。使用现成的水泥有助于清理发展中国家的水污染。本研究为广泛的富营养化问题提供了一种创新且简单的解决方案。
