HS-AS
Liquid Phase, Activated Alumina for Arsenic Removal
Hydrosil’s HS-AS is designed for arsenic removal for water treatment. The HS-AS is an activated alumina enhanced with iron oxide. The media is suggested to operate in a pH environment below 7. The product is designed specifically for arsenic removal with a capacity of 5.44 mg/g of arsenic. The HS-AS is commonly used in pump and treat systems to remediate metals and arsenic. Hydrosil’s HS-AS is NFS/ANSI Standard 61 for drinking water treatment and plant applications. The HS-AS also has some removal capacity for other compounds such as silica, zinc, and selenium.
What is Arsenic?
Arsenic contamination in groundwater and surface water occurs naturally and from humans. Naturally occurring arsenic is in soil, groundwater, and sediment. Volcanic eruptions naturally dispose arsenic. Industrial processes such as mining, fertilizer, and coal burning release arsenic to surface water, groundwater, and air. The contamination of arsenic in drinking water has shown damaging effects to humans such as heart damage, kidney damage, cancer, and fetal development. The Environmental Protection Agency (EPA) has set the maximum contamination limit for public water at 10 parts per billion (ppb). Arsenic is present in two forms when the pH is 6-10: Arsenite (As III), and arsenate (As V).
HS-AS Pressure Drop
typical physical properties
| Property: | Value: |
| Apparent Density, lb/ft 3 | 65 - 67 |
| U.S. Standard Sieve Size (Mesh Size) | 14 x 28, 28 x 48 |
| Al2O3+ Fe Promoter, % | 90 |
| TiO2, % | 0.002 |
| SiO2, % | 0.02 |
| Specific Surface Area, m2/g | 280 |