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从干燥和热处理水处理污泥中吸附和有机释放

Minh Duc Nguyen¹, David Donaldson², Sirjana Adhikari¹

¹School of Engineering, Deakin University, Waurn Ponds, Victoria, 3216, Australia.

Environmental research

|June 30, 2023

概括

水处理污泥有效吸附,有机物释放量随着时间的推移而减少. 热处理增强吸附并最大限度地减少有机物释放,提供可持续的水资源管理解决方案.

科学领域:

环境科学环境科学
水处理工程水处理工程
材料科学材料科学材料科学

背景情况:

水处理污泥 (WTS) 被认为具有 (P) 吸附性.
从WTS释放的有机物质可能会影响处理水的质量.
关于在P吸附过程中表征有机释放行为的研究有限.

研究的目的:

描述 WTS 在吸附过程中释放的有机物质.
评估WTS在去除的长期性能.
研究热处理作为提高WTS性能的一种方法.

主要方法:

列实验 (60天) 评估P的去除和总有机碳 (TOC) 的释放.
批量实验,以评估热处理WTS的P吸附能力.
在各种温度 (500°C,600°C,700°C) 上对WTS进行热处理.

主要成果:

在60天内,WTS柱有效地从2毫克/升的料溶液中去除了P.
TOC释放量从第1天的24.9 mg/L下降到第22天后的稳定水平 (4.1-4.4 mg/L).
在600°C的热处理产生了最高的P吸附 (1.7 mg/g) 与最小的TOC释放.

结论:

WTS是一种可行的吸附剂,用于去除,随着时间的推移减少有机释放.
热处理显著提高P吸附能力,并减少从WTS释放的有机物质.
热处理的WTS显示了改善水资源管理和可持续性的潜力.

关键词:

有机释放有机释放的吸附方式是的吸附.热处理是一种热处理.处理水的污泥污泥.零浪费.零浪费.没有浪费.

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相关概念视频

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide: