Wastewater treatment
In the past decades, the production of various types of sewage with different pollution loads has increased significantly due to the increasing population, which, if not properly managed, can cause pollution and cause irreparable damage to the environment. Purifying and reducing the pollution load of these wastewaters is necessary and inevitable to prevent environmental hazards and also to provide the possibility of reusing them in different sectors.
Among the different types of wastewaters, we can mention urban, industrial, agricultural, and hospital wastewaters, each of which has a different pollution load. In general, the types of wastewater pollution loads can include the following:
1- Microbial agents and pathogenic agents that are particularly important in hospital wastewater.
2- Heavy metals
3- Anions
4- Chemical compounds
5- Nutrients and phosphorus
6- Suspended substances and solid particles
7- Gases such as ammonia and hydrogen sulfide
8- Radioactive materials
Zeolite-clinoptilolite is an aluminosilicate mineral with a porous structure and a high cation exchange capacity, which has a special surface due to this nanometer porosity, and thus the possibility of surface adsorption and catalytic properties. On the other hand, due to this porous structure, it has the possibility of molecular sieve and absorption of some gases and liquids. These characteristics, along with high mechanical, chemical and thermal stability, as well as reasonable price, have made it possible to use this environmentally friendly and non-toxic mineral widely in the treatment of all types of wastewater.
The benefits of using zeolite
1- Absorption of heavy metals due to high cation exchange capacity
2- Absorption of many anions such as nitrate
3- Ammonium and hydrogen sulfide absorption
4- Mechanical filter of solid particles and increasing water clarity
5- Absorption of harmful chemicals such as oils, polymers, hydrocarbons
6- Decreasing nutrients, especially phosphorus, and preventing the excessive growth of algae and bacteria, thus jeopardizing the biological balance of aquatic environments.
7- Reduction of BOD and COD and increase of oxygen level
8- Reducing the amount of radioactive materials
9- pH stability
The proper performance of zeolite-clinoptilolite is dependent on its inherent characteristics and purity, for example, it can be said that by increasing the cation exchange capacity, the ability of zeolite to absorb various cations increases, or higher specific surface area and porosity cause better performance in this area. Choosing the right quality zeolite is very important in this field.
Environment
sewage
Garbage
Oil stains
Acid mine drainage
In many mines, especially sulfide metal mines, acid conditions are created due to the extraction, accumulation and exposure to oxidation of sulfide minerals such as pyrite, which is a main waste mineral. These acidic drains increase the mobility of many heavy and toxic metals due to their low pH. Due to its low pH and high concentration of harmful metals, this acidic sewage can cause many hazards in aquatic, soil, plant and even animal and human environments, and for this reason, it is necessary to create balanced conditions before entering the environment.
Due to its high cation exchange capacity, creating an alkaline environment, high chemical stability, and reasonable price, zeolite-clinoptilolite can be used as a mineral and completely non-toxic and compatible with the environment in increasing pH and absorbing harmful heavy metals.
Benefits of use
1- Balancing the pH
2- Absorption of heavy metals
3- Reasonable price