Zirconium-Modified Attapulgite Composite for Phosphorus Removal and Algae Control in Lake Water

IF 1.4 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2024-11-10 DOI:10.3390/w16223233

Chun-Yan Lin, Wenliang Wu, Wenya Shao

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引用次数: 2

Abstract

Phosphorus removal is critical for effective water treatment and the prevention of eutrophication. This study focuses on the modification of attapulgite, an economical clay material, with zirconium (Zr@ATP) to enhance its phosphorus adsorption capacity. Zr@ATP was comprehensively characterized, and its phosphorus-removal mechanisms were investigated. Additionally, its performance in water treatment was evaluated using a lake water-sediment system. Zr@ATP exhibited a high surface area of 329.29 m2/g. The static adsorption experiments revealed that Zr@ATP achieved a phosphorus-removal efficiency of 95.8% at an adsorbent dosage of 5 g/L. Kinetic studies indicated that the adsorption followed a pseudo-second-order model, with the primary mechanism being chemisorption via ion exchange. Application of Zr@ATP in a lake water-sediment system resulted in an 83.6% reduction in total phosphorus. The chlorophyll concentration significantly decreased from 32.33 μg/L to 8.56 μg/L, and the algal density decreased by 84.6%, effectively inhibiting algal growth. These results suggest that Zr@ATP is a promising adsorbent for sustainable phosphorus removal and eutrophication control in aquatic environments.

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锆改性凹凸棒石复合材料在湖泊水体除磷抑藻中的应用

除磷是有效的水处理和防止富营养化的关键。本文研究了用锆（Zr@ATP）对经济粘土材料凹凸棒土进行改性，以提高其磷吸附能力。对Zr@ATP进行了全面表征，并对其除磷机理进行了研究。此外，还利用湖泊水-沉积物系统对其水处理性能进行了评价。Zr@ATP的比表面积高达329.29 m2/g。静态吸附实验表明，当吸附剂用量为5 g/L时，Zr@ATP的除磷效率为95.8%。动力学研究表明，吸附符合准二级模型，主要吸附机理为离子交换化学吸附。在湖泊-沉积物系统中应用Zr@ATP可使总磷减少83.6%。叶绿素浓度从32.33 μg/L显著降低到8.56 μg/L，藻密度下降84.6%，有效抑制了藻的生长。这些结果表明Zr@ATP是一种很有前途的吸附剂，可用于水生环境的可持续除磷和富营养化控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).