Calcium peroxide

Calcium Peroxide

Crystal structure of calcium peroxide (CaO_)

Calcium peroxide (CaO_) is an inorganic compound that belongs to the class of peroxides. It is a white or yellowish solid that is insoluble in water but reacts with it to release oxygen. Calcium peroxide is used in various applications, including as a source of oxygen in environmental and agricultural settings, as a bleaching agent, and in the food industry.

Chemical Properties

Calcium peroxide is composed of calcium ions (Ca__) and peroxide ions (O___). The compound is stable at room temperature but decomposes upon heating or in the presence of moisture to release oxygen gas. This property makes it useful in applications where a slow release of oxygen is desired.

Reactivity

Calcium peroxide reacts with water to form calcium hydroxide (Ca(OH)_) and oxygen gas (O_):

CaO_ + 2 H_O _ Ca(OH)_ + O_

This reaction is utilized in environmental applications to enhance soil aeration and in bioremediation processes to supply oxygen to microorganisms.

Applications

Environmental Remediation

Calcium peroxide is used in bioremediation to treat contaminated soils and groundwater. It provides a controlled release of oxygen, which enhances the activity of aerobic microorganisms that degrade organic pollutants.

Agriculture

In agriculture, calcium peroxide is used to improve soil quality and promote plant growth. It acts as a source of oxygen for plant roots and helps in the breakdown of organic matter in the soil.

Food Industry

Calcium peroxide is used as a dough conditioner in the baking industry. It strengthens the dough and improves its texture by releasing oxygen, which helps in the oxidation of gluten.

Bleaching Agent

Calcium peroxide is also used as a bleaching agent in the textile and paper industries. It helps in the removal of stains and impurities by oxidizing colored compounds.

Safety and Handling

Calcium peroxide should be handled with care as it can cause irritation to the skin, eyes, and respiratory tract. It should be stored in a cool, dry place away from moisture and incompatible materials such as acids and organic substances.

Related pages

• Peroxide
• Calcium oxide
• Bioremediation
• Soil aeration