2023 Online Catalog - Flipbook - Page 122
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LayneRT™ Arsenic Select Resin
LayneRT™ has been developed as a
significant improvement on the efficiency
and longevity of adsorptive arsenic
media, thus lowering the operating cost
associated with removing arsenic (arsenate
and arsenite) from water. It’s ideal blend
of selectivity and durability means that
LayneRT can reliably and efficiently reduce
arsenic to safe consumption levels.
Resins, Media & Chemicals
LayneRT is a long lasting, high capacity
technology that provides rapid adsorption
kinetics without generating any fines. Not
only does LayneRT provide optimal flow
dynamics, no back-washing (no onsite
residuals), and a low pressure drop, but it
is also regenerable, thereby mitigating the
liability associated with waste disposal.
Material: LayneRT is comprised of a
hybrid resin bead that is attrition resistant
and does not generate fines. Media
comprised of granulated materials are
friable and generate fines, which can
lead to increased back-pressure during
operation requiring backwash, additional
system complexity and more frequent
maintenance.
NSF/ANSI Standard 61 Certified
No Backwash Required: Backwash
requirements add operational complexity,
and generate flues containing an arsenic
residual.
Arsenic Residuals: LayneRT requires no
backwash and does not generate arseniccontaining flues.
Disposal: LayneRT may be returned
directly to Layne for environmentally
responsible disposal. Although most spent
media pass TCLP, research supports that
they leach arsenic under actual landfill
conditions. “TCLP Underestimates Leaching
of Arsenic from Solid Residuals Under
Landfill Conditions” Ghosh A., Mukiibi
M., Ela W, Environ. Sci. Techno!., 2004,
38(17), pp 4677-82.
Minimum Contact Time: A lower contact
time enables systems using LayneRT to
have a smaller system footprint, reducing
facility requirements. - (2 Minutes)
Chemistry: Hydrous metal oxides are the
industry accepted chemistry for binding
arsenic.
TOTAL ARSENIC - Total arsenic
concentration above 0.30 mg/L will reduce
media life.
ARSENITE AS(III) - The arsenic removal
media removes both As(III) and As(V) but
has approximately four times the capacity
for As(V) over As(III). If arsenite is present
it is recommended to oxidize the water
ahead of the arsenic removal media.
pH - Adsorption media operate most
effectively between 5.5-8.5. The media will
reduce arsenic outside of this range but the
capacity may be compromised. At elevated
pH, silica becomes a more aggressive
interfering species. Note: Do not use
organic acids (such as citric or acetic) to
adjust the pH ahead of the media.
SILICA - Levels above 20 mg/L begin to
interfere with media arsenic adsorption
when combined with a pH above 7.5.
PHOSPHATE - Levels above 0.15 mg/L will
reduce media life for arsenic adsorption.
IRON AND MANGANESE - Soluble iron and
manganese may precipitate onto the media
bed. If iron and manganese are above the
secondary MCLs (0.30 mg/L and .050 mg/L
respectively), it is recommended to filter
them before the arsenic removal system.
HARDNESS - Does not affect the
performance of the arsenic removal media.
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Water Quality Criteria
Typical Characteristics
pH Range...................................................................................................... 5.5 – 8.5
Arsenic1.....................................................................................................< .05 mg/l
Arsenic Type2 ................................................................................... Pentavalent
Phosphate (PO4) (as P) ....................... < 0.150 mg/l (< 0.05 mg/l)
Silica ............................................................................................................. < 20 mg/l
Iron ...............................................................................................................< 0.3 mg/l
Manganese .........................................................................................< 0.05 mg/l
Hydrogen Sulfide ................................................................ Non Detectable
Chlorine Residual ............................................................................ < 1.0 ppm
Tannins ........................................................................................ Non Detectable
Hardness....................................................................................... Not Applicable
Structure ............................................. Macroporous Polystyrene Bead
Functional Group ....................................................... Hydrous Iron Oxide
Bulk Density (as sold) .......................... 790–840 g/l (49–52 lb/cu.ft)
Specific Gravity ........................................................................1.25–1.30 g/ml
Minimum Contact Time ............................................................... 2 Minutes
Operating Temperature Range .......................1-80º C (33–172º F)
Particle Size ....................................................................... 300–1200 microns
Operating pH Range .............................................................................. 5.5–8.5
Selective Ion Exchange Resin and Media
LAYNE RT ARSENIC RESIN
LAYNERT-100-BOX
LAYNERT-50-BOX
For more information visit – NelsenCorp.com
$
1 Cubic Foot Box
1/2 Cubic Foot Box
• Commercial.NelsenCorp.com •
All prices and products subject to change without notice. ©Nelsen Corporation
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