home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.chem
- Path: sparky!uunet!boulder!ucsu!ucsu.Colorado.EDU!smithrs
- From: smithrs@ucsu.Colorado.EDU (SMITH RANDALL SCOTT)
- Subject: Re: Oil Spills
- Message-ID: <1992Nov16.164742.6291@ucsu.Colorado.EDU>
- Sender: news@ucsu.Colorado.EDU (USENET News System)
- Nntp-Posting-Host: ucsu.colorado.edu
- Organization: University of Colorado, Boulder
- References: <92318.230825KRK4@psuvm.psu.edu> <74956@hydra.gatech.EDU>
- Date: Mon, 16 Nov 1992 16:47:42 GMT
- Lines: 35
-
- In article <74956@hydra.gatech.EDU> gtd205a@prism.gatech.EDU (Hody Crouch) writes:
- >In article <92318.230825KRK4@psuvm.psu.edu> KRK4@psuvm.psu.edu (Kyle R. Krom) writes:
- >>
- >> I've been reading about the efforts to clean up the Alaskan coastline
- >>since the Exxon Valdez incident, and was thinking... what exactly is the
- >>major difficulty with cleaning up oil spills in the water? It can be
- >>reasonably contained, and it floats on the top, so why can't it be scooped
- >>up somehow? Please feel free to elaborate a bit, since I have several
- >>questions, depending on the responses to this basic problem.
- >
- >Well, the method that you suggest cleaned up the vast majority of the spilled
- >oil. The coast guard and other organizations put out large booms and the oil
- >was 'skimmed' off the top of the water. Here are the main problems.
- > 1. Some of the oil reached land, where it coated the shoreline, and any
- >animal on it. Once on the shore, oil becomes extremely difficult to clean up.
- >And even if it is cleaned up, much damage has already been done.
- >
- > 2. Oil also begins to spread through the water. The oil molecules attract
- >H2O, and when enough water molecules surround a small oil molecule, it can
- >'dissolve' (used in the loosest sense of the word).
- >
- >Those are the only big problems I can tink of right now... hope it helps.
- >
- >
- One of the major problems with oil spills on water is that the oil emulsifies
- under wave action. The goopy lumps of oil-water emulsion have a nasty tendency
- to sink. These lumps roll about the seafloor, coating whatever is unfortunate
- enough to get in their way. Aside from containing loads of toxic hydrocarbons,
- the tarry sludge is also high in heavy metals (remember, this stuff is usually
- unrefined). Tar balls can wash ashore weeks after the visible mess on the
- surface has been cleaned up or evaporated.
-
- Randall Smith
- smithrs@ucsu.colorado.edu
-
-