The University of Iowa was very lucky to receive a visit from scientist, researcher, and adjunct professor Dr. James Hansen. He was gracious enough to sit down with us and interview. Today’s video talks about his relationship with Dr. Van Allen.
The University of Iowa was very lucky to receive a visit from scientist, researcher, and adjunct professor Dr. James Hansen. He was gracious enough to sit down with us and interview about his work, education, and relationship with Dr. James Van Allen. Today’s video talks about his education and advice to students.
The University of Iowa was very lucky to receive a visit from scientist, researcher, and adjunct professor Dr. James Hansen. He was gracious enough to sit down with us and interview about his work, education, and relationship with Dr. James Van Allen.
Hansen was trained in astronomy and physics under Dr. Van Allen at the University of Iowa, graduating with the highest distinction in 1963; he then published his dissertation on Venus and helped launch the Pioneer Venus project in May of 1978. Hansen was the head of the NASA Goddard Institute for Space Studies in New York from 1981 to 2013. Today, he continues his work on climate change as the director of the Program on Climate Science at Columbia University’s Earth Institute, and gave a TED talk on climate change in 2012.
This video, discussing his work, will be the first of a 3 part video series. Tomorrow, Dr. Hansen will speak directly to students and the following day will focus on his relationship with Dr. Van Allen.
The Getting Ahead of the Watershed Expo will be held in the Davenport River Center’s Mississippi Hall on Saturday, March 10th from 10am to 3pm.
This is a free event, presented by students of Davenport North High School and Davenport Public Works, that aims to raise awareness about the quality of our waterways and individual impact on water quality through engaging demonstrations and exhibits.
The event will feature several interactive student and vendor booths with topics ranging from environmentally positive ways to increase the curb appeal of your home to locks and dams and levees. In addition to interactive displays, a play featuring Franny the Fish, is sure to bring a smile to all ages, while delivering important information about our watershed.
There will also be a 9ft+ root system of native grass Big Blue Stem. The root system is certain to amaze and highlight the ecosystem, soil and water quality benefits of native plants in our landscape.
Attendees will also enjoy theDavenport Community School student artwork on display at the Expo, and to vote for their favorite art piece and booth, as well as enter a drawing for a beautifully decorated rain barrel.
Within the last two weeks U.S. Environmental Protection Agency head administrator, Scott Pruitt, made plans to retract Obama’s Clean Power Plan. During his campaign, Trump promised to defend renewable fuel. However, upon election, Trump appointed several prominent figures from the oil industry. Last month Chuck Grassley stated that,”Big Oil and oil refineries are prevailing, despite assurances to the contrary.”
Ernst sent a letter to Pruitt reminding him of the “…pledges that were made to my constituents and to farmers across the country.”
Bill Wehrum is currently nominated to be the assistant administrator for the Office of Air and Radiation. Pruitt and Wehrum expressed interest in lowering the Renewable Fuel Standard (RFS) requirements. This got attention from several senators, particularly because supporting renewable fuel was one of the only agricultural promises Trump made during his campaign. Ernst blocked Wehrum’s nomination and expressed her concerns that they were only getting “evasive, squishy answers regarding the RFS.”
Instructed by Trump, Pruitt sent a letter to Ernst and 7 other Midwestern senators. The letter had a list of commitments towards renewable fuel stating the Renewable Volume Obligations levels would not be lowered. There was also a meeting held between Pruitt, Grassley, and 6 other senators. Wehrum’s nomination will proceed.
Pruitt concluded, “I reiterate my commitment to you and your constituents to act consistent with the text and spirit of the RFS.”
Thursday and Friday’s symposium was held at Drake University’s Shivers Facility.
Dr. Peter Thorne, University of Iowa professor and director of the Environmental Health Sciences Research Center, makes the day’s opening remarks.
Neil Hamilton, professor of law at Drake University, details the legal reality of water quality policy in Iowa.
About 170 people registered for the one-and-a-half day symposium.
Concerned citizen and farmer Veronica Lock poses a question during a Q & A session.
Dr. Pete Weyer, director of the Center for Health Effects of Environmental Contamination, details the history of nitrate surveillance in the state of Iowa.
Dr. Mary Ward of the National Cancer Institute presents her findings about the relationship between nitrate in drinking water and cancer in humans.
Dr. David Cwiertney of the University of Iowa shares his research related to disinfectant by-products.
Former director of the Iowa City Water Department, Ed Moreno, provides the public utility’s perspective.
One of the afternoon’s panel sessions featuring Dr. John Nuckhols, Dr. David Cweirtney and Ed Moreno (left to right).
Jenna Ladd | September 22, 2017
Government officials, college faculty, students of all ages, legislators, farmers and concerned citizens were among the 170 attendees at the Challenges to Providing Safe Drinking Water in the Midwest, a symposium held at Drake University Thursday and Friday.
The hypoxic Dead Zone in the Gulf of Mexico grew larger than ever before this year, totaling 8,766 square miles, an area equal to the size of New Jersey. It is well known that nitrate runoff from agricultural fields is largely responsible for rendering this part of the Gulf unable to sustain aquatic life, but how does nitrate in our water affect the humans that are drinking it?
Citing past and current studies, Dr. Mary Ward of the National Cancer Institute noted that while nitrate itself is not a carcinogen per say, it does interact with compounds in the body to create nitroso compounds, which are known carcinogens. Nitroso compounds have been found to be carcinogenic in 39 animal species including all nonhuman primates, even when nitrate concentration in drinking water is less than 10 milligrams per liter (mg/L), which is the federal Environmental Protection Agency’s limit for nitrate in drinking water.
The Iowa Women’s Health Study, which monitors the health of 42,000 post-menopausal Iowa women—most of whom drink municipal drinking water—found that women who drank water with elevated nitrate levels for a prolonged period of time had twice the risk of ovarian and bladder cancer. There are some protective measures consumers can take to reduce the likelihood that nitrate will become a carcinogenic once in the body. Eating plenty of vegetables and fruits that are rich in vitamin C and antioxidants can block the formation of cancerous nitroso compounds.
Scientists can also say with confidence that nitrate pollution in drinking water significantly increases the likelihood that pregnant women will give birth to babies with neural tube defects such as spina bifida and anencephaly, according to Dr. Jean Brender, professor emeritus at the Texas A&M School of Public Health. Dr. Brender also presented findings that suggested an association between nitrate pollution and children born with cleft palates and limb deficiencies during Thursday morning’s plenary session.
A common thread between most nitrate and human health impact studies is that researchers notice adverse public health effects even when nitrate concentration are at 5 mg/L, which is half of the EPA’s 10 mg/L action level.
After lunch, retired director of the Iowa City Water Department, Ed Moreno, provided the perspective of the water utilities, who work to remove contaminants and provide safe drinking water costing an average of just $0.004 per gallon. Moreno emphasized that drinking water treatment is an increasingly technical process that can be difficult to communicate to the public. With so many health risks related to the consumption of drinking water contaminants, who’s responsibility is it to communicate drinking water quality risks to the public?
Moreno said much of the responsibility lies with the public utility, however, he said, “Explaining the risk is a challenge for us. We need partners, public health people, people who are going to say it like it needs to be said,” Moreno added with a chuckle, “We’re engineers, you know.”
Dr. David Cwiertney, associate professor of Civil and Environmental Engineering at the University of Iowa, highlighted the EPA’s Enforcement and Compliance History Online, or ECHO, an online database that allows citizens to check their community utility’s compliance with federal environmental regulations free of charge. Cwiertney said, “We should be doing better community education about the resources they have. The internet is a wonderful thing.”
Aside from nitrate pollution, experts in disinfectant byproducts, blue green algae blooms, neonicotinoids, and endocrine disruptors shared their drinking water research at the symposium.
Thursday began with a keynote address from Neil Hamilton, professor of law at Drake University. Hamilton detailed Iowa’s rich history as a nationwide leader in environmental and water quality policy, dating back to the work of Ada Hayden and Aldo Leopold in the beginning of the 20th century. After state legislators failed for the seventh year in a row to approve funding for voter-approved water quality improvement measures, even as Iowans are exposed to heightened risks for cancer and birth defects without it, Hamilton’s closing question echoed loudly in the Drake University conference room, “Has our legacy of leadership become an ephemeral gully of inaction?”
Dr. Craig Just is an assistant professor of Civil and Environmental Engineering at the University of Iowa. Up for tenure this summer, Dr. Just teaches graduate level courses along with an undergraduate principles of environmental engineering course. His research interests range from freshwater mussels’ impacts on the nitrogen cycles in rivers and streams to the fate of explosive chemicals once they are released into the natural environment. Iowa Environmental Focus caught up with Dr. Just to discuss his research on wastewater treatment in smaller communities.
Jenna Ladd: I wanted to focus on your wastewater treatment research in smaller communities. So, why can’t people in smaller communities flush their toilets affordably?
Dr. Craig Just: So, in a town like Iowa City, we just had an over $15 million expansion to our wastewater treatment plant but that cost was spread, you know, among a population base of 75,000 or 80,000 people so the per person cost for such an advance treatment system is under probably a thousand bucks each, give or take, prorate over a certain amount of time. But for smaller towns, who have increasingly rigorous environmental regulations they have to meet, particularly with respect to the discharge of ammonia and bacteria, they’re small so when you have to do a technology upgrade, it’s more expensive per resident and that’s one of the main issues. The other issue is that it also becomes more expensive then to pay an operator for the plant, someone that has the expertise needed to operate an increasingly more sophisticated treatment system. So, then you have to spread that cost amongst a small population base as well and so both of those factors are really scaling issues that, really, small towns have a problem dealing with compared to some other places. Those are some of the main issues going on there.
Jenna Ladd: How were those issues brought to your attention?
Dr. Craig Just: Sometimes it’s with screaming mayors at small town hall meetings. I’ve been going to Des Moines to talk about this issue since at least 2005. Legislators know it’s a problem, their constitutes tell them it’s a problem. In 2010, I was one of the co-leaders of what’s known as the faculty engagement tour. We get faculty who are typically stuffed in their offices and labs and we stuff them in a bus and took them all around Iowa to say, “You know, here are the people that pay your salaries, really, in a way, and let’s be aware.” So, we had a town hall meeting in Goodell, Iowa, town of about 225 people facing a $2.2 million waste water treatment plant upgrade bill and the mayor of that town and the mayor of three or four other towns came to this meeting. Over 100 people showed up to this meeting in all that was left of the school, the old gymnasium. The school’s gone….Everybody came out, it was such a big deal. People were mad, they were shouting. They viewed me as part of the cultural elite who wasn’t doing enough for them in rural Iowa, and that we were putting unrealistic environmental constraints on them that led them to essentially go bankrupt as a town. So I’ve heard it in casual conversation, I’ve heard legislators talk about it, I’ve heard it in town hall meetings. Candidly, at this point it’s hard for me to get away from. I’m from rural Iowa, you know, that’s where I’m from. So I’ve seen it first hand, it’s not hard to see.
JL: Are these newer wastewater treatment regulations or are communities just kind of playing catch up to those regulations that were already in place?
CJ: They’re new, and I would say that they’re based at the federal level. I would say one of the things that’s happening, and it’s a challenge for Iowa in particular, so the population in the U.S. has gone up. I think in just the U.S. alone, we’re up to like 330 million people now, whatever, 50 years ago, I think it was like 200 million or something. I don’t know those numbers, but the point is the overall population density has been going up. Most towns in these watersheds that have a discharge into a stream, most of them have gotten more dense so then you have to have more stringent regulations to not kill the stream. But when you apply those things at the federal level for the National Pollution Discharge Elimination System, it kind of puts a disproportionate burden on the places that haven’t grown. In fact, in rural Iowa, it’s less dense but then you still have to meet these federal standards which are somewhat one-size-fits all and so, I don’t disagree with the fact that the federal standards have become more strict but it’s difficult to apply it in a place that’s population and tax base isn’t growing. It puts rural Iowa at a very special pinch point where those two things converge.
JL: Are there any solutions you’ve come up with for this problem?
CJ: Well, first of all, there are already some alternative technologies, they’re called, that are approved in Iowa that are robust and more affordable, not as affordable as you might like but still more affordable. So, one of the things that we’re doing in partnership with H.R. Green Consulting Engineers, one of our alums there Matt Wildman has really kind of led the use of this technology in Iowa. We’ve partnered with them and the community of Walker, Iowa to extensively test one of these alternative technologies called—it’s a lagoon modification—a submerged attached growth reactor, essentially rocks in a box. A couple lagoons. The lagoons are aerated, they take care of some of the wastewater issues and then it goes to these rocks in a box where the bacteria then are attached to the rocks, they further covert the ammonia with aeration to nitrate, which you can still legally discharge in Iowa—it’s a fertilizer though. It doesn’t solve all of our problems if you look at the broader watershed problems with respect to nutrient discharges, but yet it removes the acute toxicity associated with ammonia discharges. So, that works out well in many regards. It still doesn’t solve all the problems because at least, approximately half the cost of the system is just the pipes that collect the waste from each house and those systems are deteriorating in these towns as well. So, even if we’re improving the system at the end of all those pipes it still kind of tricky to deal with that.
I’m even thinking of almost having your toilet be more like an appliance where you don’t have to convey your waste someplace else. If we could find a way to do that, almost like a compost toilet would work, the composting waste you’d have to collect. The nice thing about that sort of a mentality is you could then use that waste as a resource because there are nutrients in there, there is energy value in that waste. Right now we send it to a lagoon and then one of these box of rocks with bacteria, we treat it but we don’t harvest any of the energy…in fact, we have to put energy in. I think if we could find ways to do that, even in these small towns, then it would make them more sustainable. It would give them extra resources that I think would be valuable. So in the future, I think it would be valuable to maybe not have these lagoons at all. Especially for these towns that are increasingly small, you know, like 600 people or less.
But anyway, so I’m thinking even longer term, but in the short-term, these alternative technologies are better. One of the things that we’ve been able to do then, with all this data collection that’s been going on in Walker since 2013 is now, we can more appropriately size the technology. Since we didn’t have very much data before, we kind of over-sized it in the name of kind of a safety factor. Now with data, we can shrink the size which then makes it cheaper. So that’s where the researcher comes in. As a researcher, I can come in, get this data, say “No, it doesn’t need to be this big” and then work with Iowa Department of Natural Resources to get that approved. That just recently happened. So, now going forward this particular technology can now be about a third smaller, which would have saved Walker, Iowa about $150,000 on a 2.5 million project. That’s real money. 750 people and $150,000 saved, that would be a lot. You multiple that across the nearly 800 or 900 communities these technologies are targeting so that’s a lot of money that Iowans can save. That’s kind of where research and the practical nature of trying to make things affordable come together. Sizing things appropriately so they still work and then making sure the operators still know how to handle any disruptions and understand why things do get disrupted from time to time.
JL: Are you communicating with people working to solve these problems in rural communities in other states?
CJ: In general, Iowa is a little bit behind. Even our peers on our borders: Minnesota would be ahead of us in many regards, some other places too. A lot of these alternative technologies have been utilized in warmer climates. Since they’re biological processes, the bacteria work better when they’re warm, just like you or I do. I don’t move so fast when I’m cold and neither do bacteria. So the challenge for Iowa has been even though some other states have been embracing these alternative technologies more readily, they are easier case studies too. So really, for Iowa, it’s been “How do we manage the cold weather?” that we have and “Will these systems still work when it’s cold?” So, we’ve applied what we can from other states in trying to catch up and now we have to deal with that in our own Iowa circumstance going forward. So yeah, we’ve learned from other places, but we still have to make sure we deal with, you know, Iowa’s situation.
JL: In what ways does this research relate to your teaching?
CJ: Increasingly, developing countries, where again you lack a population base and kind of a resource base and a tax base, some of the challenges are like rural areas in the United States. They’re kind of falling into some of those same categories sometimes so I want our engineers that graduate from our program to understand the rural dilemma. It’s relatively easy to be an engineer when you have all the resources you need, you got money. Yeah, shoot, design away, and it’s fun to kind of do it like that, but when you have to apply your engineering skills and really your community engagement skills at the same time to try to make a difference in a community that’s struggling just to keep their doors open, that’s a cool place. That’s very satisfying and rewarding for an engineer to be operating there. So I’m encouraging our students to do that in some way or another so when they go out into engineering and consulting, they’ll be aware of the issues that small rural communities face in contrast to what growing, urban areas face: fundamentally different engineering problems.