Ambersorb resin

Although results for the two Ambersorb resins are in good qualitative agreement, the contaminant concentrations are consistently much higher for the Amberlite XAD-4 resin. This trend is directly attributable to the higher surface area of 725 m2/g associated with the XAD-4... 

Ambersorb Resins. Chromatographable residues attributable to each of the Ambersorb resins, XE-340 and XE-348, as shown in Figure 1, are significantly lower than the values reported for each of the Amberlite resins. As shown in Figure 3, the majority of the components isolated from the Ambersorb XE-340 resin are readily classified as polycyclic aromatic hydrocarbons. (These are believed to be associated... 

Zhou, S. W., Malaiyandi, M. and Benoit, F. M. 1990. An investigation on the concentration efficiencies of some macroreticular and ambersorb resins using radio-labeled organic contaminants commonly encountered in water, J. Environ. Anal. Chem.,3. 439 71. 

Carbonized Resins Saran Carbon Carbosive B, S Ambersorb XE-340,... 

POLYMERIC SORBENTS are frequently used in environmental analytical schemes for the isolation and/or preconcentration of trace organic contaminants from air and water matrices. Commercially manufactured polymeric sorbents such as Amberlite XAD resins, Ambersorb XE resins, Tenax (diphenyl-p-phenylene oxide), and polyurethane foam (PUF) have been used extensively for the collection of trace organic contaminants from ambient air, process streams (i.e., flue gas), and a variety of aquatic matrices including industrial effluents, ground water, surface water, and potable water supplies. Currently, these materials... 

This chapter provides some insight into the chemistry of a number of commonly used polymeric sorbents. Particular focus is placed on the chemical identification of contaminants typically associated with each of the following types of polymeric sorbents Amberlite XAD resins, Ambersorb XE resins, and PUF. Emphasis is placed on the chemical speciation of solvent-extractable organic contaminants present in a number of these sorbents as received from the manufacturer. Both qualitative and quantitative data on a micrograms-per-gram (parts-per-million) basis are provided as determined by combined gas chromatography-mass spectrometry (GC-MS). 

Amberlite XAD-2 and XAD-4 and Ambersorb XE-340 and XE-348 resins were obtained through the courtesy of Rohm Haas. Representative lots of each of the four resins were provided. 

Ambersorb XE Resins. Two lots of Ambersorb XE-340 and one lot of Ambersorb XE-348 were prepared for analysis. The sample size and preparation procedures were identical to those employed for the Amberlite XAD series. Further details pertinent to these analyses are contained in a previous publication (2). 

Ambersorb XE Resins. All instrumental analyses were identical to those employed in the analysis of the Amberlite XAD resins as described previously (2). 

Figure 3. Total ion chromatogram of extractable organics in a typical lot of Ambersorb XE-340 resin (SP-2100,10-m capillary column, temperature program 50(2)-250 at 5 °C/min, 1.0-pL splitless injection). 1, naphthalene 2,1- or 2-methylnaphthalene 3, biphenyl 4, 1,V-biphenyl, 2- or 3-methyl 5, fluorene 6, anthracene-phenanthrene 7tl- or 2-phenylnaphthalene 8, pyrene 9, fluoranthene 10, terphenyl isomer 11, benzo[b]naphthothiophene isomer 12, binaphthalene isomer 13, benzofluoranthene isomer. (Reproduced from...

Carbonaceous resin Ambersorb 563 5-2500 mg/L Synthetic groundwater distilled deionised water, buffered 7.2 by NaHCOs, NaCl 170 1.23 0.09 2.00 0.14 [47]... 

Other adsorbent materials investigated in Hterature include carbonaceous resins such as Ambersorb 563, 572, 575, synthetic resins (Amberhte XAD4, XAD7), porous graphitic resins (Hypercarb), and zeolites (mordenite, ZSM-5, Beta, Y) with different Si02/Al203 ratios or pore sizes. Results are shown in Tables 4 to 6. 

Ambersorb 563 (carbonaceous resin) showed in all studies best performance [28,47,53,54,56], sometimes Hmited to MTBF concentrations below... 

Cost calculations showed that the expenses for zeolite application are in the same range as for coconut shell-based activated carbon and carbonaceous resin (Ambersorb) since material costs are similar. However, the estimated bed life for zeolites is up to six times longer than for activated carbon and the estimated adsorbent usage rate is only 25% [54]. Moreover, zeolites are thermally stable which implies an easier and faster regeneration [57]. 

The carbonaceous resin Ambersorb 572 remains imaffected by the presence of NOM [28]. A study conducted in Santa Monica water showed no decline in capacity compared to deminerahzed water [53]. Moreover, Amber-sorb is not prone to biofouling inside the pores. 

But not only the activated carbons are subject to the impact of co-solutes. Bi et al. [56] showed that in a binary solution of MTBE and o-xylene the latter is preferentially adsorbed on carbonaceous resin leading to a reduction in adsorption capacity for MTBE. Similar results are found for m-xylene [28,47] and other BTEX [58]. Davis and Powers [47] showed, however, that the influence is more pronounced on activated carbon (F-400) than on the carbonaceous resin Ambersorb (35% reduction vs. 11% reduction). 

Like PCC or Ambersorb 1500 , the cation exchange resin is added to the sediment at concentrations of 15 to 20% of the sediment wet weight and mixed thoroughly. After a 24 hour equilibration period, the toxicity testing organisms are added to the exposure. The resin is left in the sediment throughout the exposure. When the toxicity test is terminated, the resin can be sieved-out, rinsed with deionized water, and the metals extracted with acid in order to determine... 

Like many of the other TIE manipulations, zeolite (SIR-600, ResinTech, West Berlin, NJ, USA) is added directly to the sediment 24 h before the addition of the test organisms [34]. The amount added is generally 15 to 20% of the sediment wet weight. Like the PPG, Ambersorb 1500 and cation exchange resin, the zeolite is left in the sediment during the organism s entire exposure. At toxicity test termination, the zeolite is disposed of along with the sediment. 

Figure 9.25. Water-vapor isotherms at room temperature on activated carbon and Ambersorb XE-340 (a carbonaceous polymeric resin) (Neely and Isacoff, 1982, with permission). Filled circles ( ) are for XAD-16 styrene/DVB resin, with BET surface area = 760 m /g (Kikkinides and Yang, 1992).

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