在太阳能蒸发器中优化供水,同时生产淡水和回收盐
Zhi Yang1,2, Dawei Li1,2, Kaijie Yang3
1Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China.
Environmental science & technology
|August 22, 2023
概括
这项研究介绍了一种新型的太阳能蒸发器,使用酸纤维素膜进行高效的水淡化. 它实现了高蒸发率和优异的盐回收,克服了实际太阳能净化水的关键挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 全球水资源短缺需要创新的海水淡化解决方案.
- 现有的太阳能淡化方法面临能源效率和盐排放方面的挑战.
- 有效的盐管理对于持续的海水淡化性能至关重要.
研究的目的:
- 开发一个具有增强蒸发率和高效盐管理的太阳能蒸发器.
- 在太阳能淡化中解决能源效率和盐排放之间的权衡问题.
- 展示一个实用的太阳能蒸发结构用于净化水和资源回收.
主要方法:
- 一个三维的酸纤维素膜基蒸发器的制造.
- 通过调整阻力和驱动力来控制供水.
- 测量蒸发速度和盐沉/回收效率.
- 使用盐溶液进行测试,盐含量为10重量百分比.
主要成果:
- 实现了1.5kg m-2 h-1的高蒸发率.
- 证明了在蒸发器边缘的有效盐沉,与光热区域隔离.
- 获得的盐回收率为97 g m-2 h-1 .
- 由于精确的供水控制,表现出稳定的性能.
结论:
- 开发的酸纤维素膜蒸发器为太阳能淡化提供了一个有前途的解决方案.
- 精确的供水控制是实现高性能和高效盐管理的关键.
- 该结构对淡水和从盐水中回收有价值的资源都有很大的潜力.
相关概念视频
The Water Cycle
24.5K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
24.5K
Adaptations that Reduce Water Loss
25.7K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.7K
Regulation of Water Output
335
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
335
Osmosis and Osmotic Pressure of Solutions
40.3K
A number of natural and synthetic materials exhibit selective permeation, meaning that only molecules or ions of a certain size, shape, polarity, charge, and so forth, are capable of passing through (permeating) the material. Biological cell membranes provide elegant examples of selective permeation in nature, while dialysis tubing used to remove metabolic wastes from blood is a more simplistic technological example. Regardless of how they may be fabricated, these materials are generally...
40.3K
Factors Affecting Solubility
33.5K
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:
33.5K
Solvents
64.7K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
A...
64.7K


