PCBs love to sorb to oil

Byoliveridley

News of possible interest only to me. It seems obvious that oil present in sediment enhances sorption and storage of PCBs than soot/black carbon. After all, it is a liquid phase and is present in higher amounts than black carbon. PCBs are so hydrophobic that almost any organic material has a higher affinity for PCBs than water/sediment. Carbon is a strong PCB adsorbent only for planar PCBs, and then only if it is itself graphitic, hence planar. In all other cases, oil should outcompete  carbon for PCBs. Glad they found experimental evidence. In all my (three) years of analyzing for PCBs, the oily samples are always the highest concentration ones.

Oil Is a Sedimentary Supersorbent for Polychlorinated Biphenyls

Oil Is a Sedimentary Supersorbent for Polychlorinated Biphenyls

Michiel T. O. Jonker and Arjan Barendregt

Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80176, 3508 TD Utrecht, The Netherlands

Received for review January 18, 2006

Revised manuscript received April 10, 2006

Accepted April 11, 2006

Abstract:

The often-observed enhanced sorption of hydrophobic organic chemicals (HOCs) to sediments is frequently attributed to the presence of soot and soot-like materials. However, sediments may contain other hydrophobic phases, such as weathered oil residues. Previous experiments have shown that these residues can be efficient sorbents for certain PAHs. In this study we investigated sorption of PCBs to sediments contaminated with different concentrations and types of oils, and from that derived oil-water distribution coefficients (Koil). Sorption of PCBs to both fresh and weathered oils was proportional to sorbate hydrophobicity, and no effects of PCB planarity were observed. Furthermore, the experiments demonstrated that different oils sorbed PCBs similarly and extensively (Koil up to 108.3 for PCB 169), and that weathering caused an almost 2-fold increase in sorption of the lower chlorinated PCBs. Koil values indicated that at the PCB equilibrium concentrations tested (pg-ng/L range), for many congeners weathered oil is a stronger sorbent than pure soot and soot-like materials. Due to attenuation of adsorption to the latter materials in sediments (caused by competitive adsorption with organic matter), sedimentary weathered oil will therefore, if present as a separate phase, defeat sedimentary soot, coal, and charcoal as PCB sorbent in most cases. Consequently, weathered oil probably is the ultimate sedimentary sorbent for PCBs and should be included in HOC fate models.

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    Lead in Paint, why???

    Byoliveridley

    1940-11_White_Lead_Paint.JPGThis makes my head explode, once again, science is helpless when faced with inertia, and greed. Lead-based paint has been banned in the US since 1978, and if this story is any indication, we’re still seeing the effects of peeling paint. But this bit of research from the University of Cincinnati suggests that not only is lead-based paint being used in more than half the world, it is actually legal.

    Study Supports ‘Urgent’ Need for Worldwide Ban on Lead-Based Paint

    Environmental and occupational health experts at the University of Cincinnati (UC) have found that major countries—including India, China and Malaysia—still produce and sell consumer paints with dangerously high lead levels.

    Why would anyone need to use lead-based paint when alternatives have been available for the longest time, the health effects of lead, especially on children, are very well known, and there is no @#$%^&*# reason other than greed and unwillingness to change. What is the point of all these years of research if it makes no difference at all to the bulk of the world’s population? Depressing.

    Guess what, even if lead-based paint was banned today, it’s still going to be on the walls forever. As the paint peels, kids will be exposed, have lowered IQ, and all other kinds of health issues for as long as that house is standing, which in India could be a 100 years.

    Grassroots organizing is probably needed, and if effective, the stuff will be banned in India quickly, the government does move rapidly on these kinds of easy to legislate issues. But, enforcement will be lax, and awareness will lag, which means we are looking at (my rough guess) at least 20 years more of this issue.

    Once again, the absence of a ban and its implementation affects the poor and uneducated disproportionately. The way I see it happening in India is

    1. Some grassroots awareness, media stories, etc.
    2. A furore that lasts about a week, before the next big story comes along
    3. Maybe a government action that will “ban” lead-based paint
    4. The middle class and above are now aware that they can use titania based paints, so, a quick change for them.
    5. Everyone else is still stuck with the lead-based paint.

    And this does not even begin to address what the US is going through now, aging houses, peeling paint, poor people being exposed to dangerous levels of lead.

    The world ain’t very fair…

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    Chemical Warfare

    Byoliveridley

    This story from a local Chicago TV station does an excellent job of documenting the chemical weapons dropped on Vietnam by the United States in the 1960s, the effects they still have on Vietnam, and the Americans who handled these so called “defoliants”.

    cbs2chicago.com – Agent Orange: A View From Vietnam

    During the eight years of the Vietnam War that the U.S. Military dusted the Vietnamese landscape with Agent Orange, it was only intended to kill vegetation. It was a combination of two herbicides 2,4D and 2,4,5T mixed together into the most potent plant killer ever made. It was spread over 3 1/2 million acres of forests and crops to kill the trees and vegetation so the United States troops could see the enemy. The Armed Forces were told it was harmless. But in March 1978, Bill Kurtis broke the story on CBS 2 that American veterans of Vietnam who had been exposed to Agent Orange were complaining of illnesses, birth defects among their children, skin rashes, cancer, nervous problems and respiratory problems.

    orange3_small.jpgPeople tend to blame dioxins for all the health effects. But 2,4-D and 2,4,5-T, constituents of Agent Orange, are no spring chickens. Exposure during spraying, especially of the grossly excessive amounts that rained down upon Vietnam, can cause various health effects as well, not to mention long-term devastation of entire ecosystems.

    Side note: New Zealand, in 2004, apologized to New Zealand’s “veterans” for their exposure to Agent Orange during the Vietnam war. Not a word to the Vietnamese, of course.

    Side note 2: A US Federal court, in 2005, dismissed the first claims brought by Vietnamese plaintiffs against Dow Chemicals and Monsanto, here was the government’s  reasoning:

    In a brief filed in January, it said opening the courts to cases brought by former enemies would be a dangerous threat to presidential powers to wage war.

    Translation: We reserve the right to drop chemical weapons on our “enemies”, and doing anything to abrogate this right is “dangerous”.

    Image courtesy of Reuters shows a Vietnamese child, one of many with birth defects associated with Agent Orange exposure.

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    Jeffrey Simpson and Lazy Writing aka I wrote a letter to the editor

    Byoliveridley

    Jeffrey Simpson wrote an interesting article on the politics of tarsands pipelines that had some good insights:

    • Harper lecturing Obama on playing politics is a bit rich
    • The opposition is multi-faceted, not just based on the carbon footprint
    • The opposition is widespread, and opposition is not tarsands specific, but against expanding fossil fuel in a world poised to warm at an ever increasing rate
    • Tarsands oil is dirty oil, and no amount of lobbying can take that away
    • Alterate pipeline routes such as Enbridge’s Northern Gateway are not going to be easy to construct given significant First Nations’ opposition

    It was on the last point that Jeffrey Simpson’s otherwise useful Op-Ed degenerated into what can be charitably described (by a PR hack) as an “unwise choice of words”.

    The route must traverse huge tracts of land claimed by aboriginals who, for a variety of reasons, don’t want a pipeline. Maybe they’re pigheaded. Maybe they don’t want to join modernity.

    This is insulting and ignorant to begin with. Surely Jeffrey Simpson does basic research before he writes these columns, and google searches will reveal many many articles, including one in the newspaper that pays his salary that clearly explain the rational reasons behind First Nations’ concerns on pipelines. Simpson seems to have no trouble finding rational reasons to buttress other opposition claims. He says Nebraska’s opposition was due to the pipeline passing over environmentally sensitive areas. He also uses a Royal Society of Canada report judging Canada’s green house gas mitigation efforts as inadequate to make a larger point about the pollution caused by the tarsands and fossil fuels.

    However, for First Nations’ concerns alone, he resorts to the irrational, tired and racist tropes of First Nations people being “pigheaded”, or “opposed to modernity”. What exactly is Mr Simpson trying to imply?

    I was angry enough to dash a letter off to the Globe and Mail, which they promptly published, thanks folks.

    Here’s what they published

    Jeffrey Simpson’s column (Pipe-Altering Lessons – Nov. 16) offers some good insights into pipeline politics and government hypocrisy and states accurately that people are opposed to most fossil fuel expansion, not just the oil sands. However, his speculation on First Nations’ opposition to the Northern Gateway project as “pig headed” or not wanting “to join modernity” are offensive and misstate the valid concerns voiced by more than 60 indigenous communities. They are concerned about irreparable damage to the land and salmon migration routes and are well aware how little of the large profits made by energy companies accrues to the First Nations whose land these projects are frequently based on. Their reasons are well founded and well documented by many First Nations, including the Wet’suwet’en.

    Here’s what I wrote.

    Jeffrey Simpson’s Opinion, Pipeline-altering lessons offers some good insights into oilsands pipeline politics, government hypocrisy and states accurately that people are opposed to most fossil fuel expansion, not just the oilsands . However, Simpson’s speculation on First Nations’ opposition to the Northern Gateway project as “pig
    headed”, or “not wanting to join modernity” are offensive and misstate the valid concerns voiced by more than 60 indigenous communities. They are concerned about irreparable damage to their land, and salmon migration routes. They are well aware that little/none of the large profits made by Enbridge and other oil companies accrue to the First Nations whose land these projects are frequently based on. Their reasons for opposing are well founded, and well documented by many First Nations including the Wet’suwet’en.

    If Mr Simpson were a little less “pig headed”, or “more willing to join modernity”, he would fire up that marvellous modern invention, the web browser and look up wetsuweten.com. His unnecessary slurs take away from what is a otherwise a sensible and well written article.

    They did leave out my rather snarky last paragraph 🙂

    Pig picture from jm999uk’s flickr stream used under a creative commons licence.

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    My kid loves statistics and 15 minute cities

    Byoliveridley
    My kid’s transport goals for the year

    We have started this simple diary where my 7 yo tracks each of her trips and categorizes them as car or not car. I find the analog simplicity of this approach to be appealing and I’ll be helping her keep this updated. I am also resisting temptation to add more data to this survey for myself (her project, not mine!) My movement goals are the same as hers, walk and bike as much as practicable leaving driving only for the “it’s too far or I don’t have even 10 minutes to spare or I have to carry something that won’t fit on my cargo bike, or it’s not safe to bike with a kid”.

    Our life for the most part now fits the 15 minute city model, the concept that “Everyone living in a city should have access to essential urban services within a 15 minute walk or bike.”. Other than my once a week commute to work, almost everything we do is in that 15 minute walk/bike window and while our all age and abilities bike network is still work in progress, the trend is clear (thanks Dave Thompson Victoria City Councilor for the graphic from the CRD transportation survey)

  • Hansen Utters the M word

    Byoliveridley

    Well, I for one am glad that the world’s most famous climate scientist has called for a moratorium on coal fired power plants.
    Top scientist seeks halt on coal plants – Yahoo News

    In prepared remarks to be delivered at the National Press Club Monday afternoon, NASA scientist James Hansen, who has been one of the earliest top researchers to warn the world about global warming, will call for a moratorium on building new coal-fired power plants.

    Hansen’s call dovetails with an edict by the private equity group buying TXU, a massive Texas-based utility. The equity group, led by Kohlberg Kravis Roberts & Co. and Texas Pacific Group, agreed to stop plans to build eight new coal-fired power plants, not to propose new coal-fired plants outside Texas and to support mandatory national caps on emissions linked to global warming.

    Hansen’s presentation to the press club says all coal-fired power plants that do not capture and bury carbon dioxide “must eventually be bulldozed (before mid-century).”

    The director of NASA’s Goddard Institute for Space Studies in New York, who was speaking as a private citizen, said Congress should adopt these coal cuts and if not, “citizens must accomplish this.” He said increased efficiency can make up for the cutbacks in coal.

    Hallelujah!

  • James Hansen today at the Friday Center, 3:00 PM

    Byoliveridley

    Environment North Carolina is co-sponsoring 2 events featuring Dr. James Hansen, director of NASA’s Goddard Institute and the nation’s foremost climate expert. In the past year, Dr. Hansen has lead the charge in calling for action on global warming, stating, “We have at most ten years-not ten years to decide upon action, but ten years to alter fundamentally the trajectory of global greenhouse gas emissions.”

    RSVP-NASA’s Dr. James Hansen coming to North Carolina – Environment North Carolina

    Well, if I’d been keeping normal bogging hours, this would have been up last week, anyway… Full report on the talk later tonight/tomorrow. It figures to be exciting, always great to see visionary scientists in person.

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