Waste Water Treatment

Industries like power generation, oil refining, chemical manufacturing, electroplating and mining have historically been sources of soil and water pollution.

Their wastewaters and runoff can contain heavy metals and organic compounds which can pose long term health risks through pollution of rivers, lakes, groundwater and drinking water. Many of these pollutants can be removed and recovered by CHEMRA’s ion exchange resins, adsorbents and applications knowledge.

Phenol

Polymeric adsorbents such as TREVERSORB ADS100 and TREVERSORB ADS150 are being used for the removal and recovery of phenolic compounds from wastewater. These adsorbents can reduce influent concentrations from 5,000 ppm down to less than 1 ppm in the effluent. If necessary, the phenol can be recovered when acetone is used as the regenerant.

Chlorinated Hydrocarbons

Chlorinated hydrocarbons can be removed from aqueous streams with synthetic carbonaceous adsorbents such as TREVERSORB ADS800 and ADS810. Single pass removal efficiencies of up to 99% are achievable at throughputs of up to 20 BV per hour, 4 to 5 times that of activated carbon. Regeneration is accomplished with steam.

BTX

Benzene, toluene and xylene can be adsorbed on polymeric adsorbents like TREVERSORB ADS100 and TREVERSORB ADS150. These products have loading capacities of more than 30 g/L.

Contaminated waters with an inlet concentration on 300 ppm BTX can be cleaned to 1 ppm in the effluent. In-situ regeneration with either solvents or steam allow for an effective treatment of wastewater in oil or gas field applications.

Metals (Fe, Cu, Hg, Cd, Pl, Ni, Zn,…) and cyanides

Most effluents containing heavy metals are treated with classical methods such as flocculation and sedimentation. Divalent ion selective chelating resins such as TREVERLITE CHE710/Na (in the sodium form) have a very high affinity for many metals and are currently used for the polishing of wastewater. These materials aid in the removal of the heavy metals below the required regulatory limits.

Cyanides in the effluents of plating or mining operations can be easily removed using a weak base or strong base anionic resin.

Major water contaminants and typical ion exchange resins for groundwater remediation

Trademark
Type
Capacity
(eq/L)
Uniformity
Coefficient
Remarks
Chlorinated hydrocarbon,
pesticides, herbicides
TREVERSORB ADS800
ADS
-
≤ 1.7
Carbonaceous adsorbent for removal of all traces
at ppt levels
BTX TREVERSORB ADS100/ADS150
ADS
-
≤ 1.7
Polymeric adsorbent, hydrophobic properties for
high adsorption of aromatic compounds
Phenol TREVERSORB ADS100/ADS150
ADS
-
≤ 1.7
Polymeric adsorbent, hydrophobic properties for
high adsorption of aromatic compounds
Cyanide TREVERLITE IXA600/FB
WBA
≥ 1.4
≤ 1.6
High capacity for efficient and regenerable removal
of cyanide to ppb level
Heavy metals TREVERLITE CHE710/Na
CHE
≥ 1.8
≤ 1.6
Iminodiacetic for selective removal of
copper, mercury, lead, nickel, zinc, cadmium...
TREVERLITE CHE730
CHE
≥ 1.2
≤ 1.8
Thiol for selective removal of mercury, copper,
lead, cadmium, nickel, cobalt...
TREVERLITE XS121300
CHE
≥ 0.8
≤ 1.6
Thiourea for selective removal of mercury copper,
lead, cadmium,…
PFAS TREVERLITE XS130800
SBA
≥ 0.6
≤ 1.6
Removal of PFAS micro-contaminant
Perchlorate TREVERLITE XS133100
SBA
≥ 0.6
≤ 1.6
Removal of perchlorate micro-contaminant
Radium TREVERJET IXC1110Na
SAC
≥ 2.0
≤ 1.2
Removal of radium in groundwater
or mining waste stream