The Adsorption Coefficient (K_oc)

The organic carbon adsorption coefficient, K_OC, is crucial for estimating a chemical compound's mobility in soil and the prevalence of leaching from soil. The adsorption of a compound increases with an increase in organic content, clay content, and surface area of the soil. The presence of a chemical compound can also be detected in ground water, and inference can be made about its residence time in the soil and the degradation period before reaching the water table. The presence of continuous pores or channels in soil will increase the mobility of a chemical compound in the soil.

References and Sample Uses of K_oc

1. Vaussenat F. Bosc JY. LeBlanc M. Canaud B. "Data acquisition system for dialysis machines. A model for membrane hydraulic permeability." ASAIO Journal. 43(6):910-5, 1997 Nov-Dec.
2. Jop KM. Guiney PD. Christensen KP. Silberhorn EM. "Environmental fate assessment of two synthetic polycarboxylate polymers." Ecotoxicology & Environmental Safety. 37(3):229-37, 1997 Aug.
3. Heuman DM. Bajaj RS. Lin Q. "Adsorption of mixtures of bile salt taurine conjugates to lecithin-cholesterol membranes: implications for bile salt toxicity and cytoprotection." Journal of Lipid Research. 37(3):562-73, 1996 Mar.
4. Underhill DW. "The adsorption of argon, krypton, and xenon on activated charcoal." Health Physics. 71(2):160-6, 1996 Aug.
5. Scarpitta SC. "A new beaded carbon molecular sieve sorbent for ²²²Rn monitoring." Health Physics. 70(5):673-9, 1996 May.
6. el-Kheshen S. Zia H. Badawi A. Needham TE. Luzzi LA. "Coating charcoal with polyacrylate-polymethacrylate copolymer for haemoperfusion. III: The effect of the coat thickness on the adsorption capacity of the coated charcoal and its adsorptivity to small and middle size molecules." Journal of Microencapsulation. 12(5):505-14, 1995 Sep-Oct.
7. Scarpitta SC. "A theoretical model for ²²²Rn adsorption on activated charcoal canisters in humid air based on Polanyi's potential theory [see comments]." Comment in: Health Physics 1996 Feb;70(2):271-3 Health Physics. 68(3):332-9, 1995 Mar.

http://www.epa.gov/OGWDW/dwh/t-soc/soc-t.txt

http://cstars.ucdavis.edu/papers/sustin/pestocc/paper.html

http://deq.state.wy.us/wqd/44658.htm