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Climate change slows reduction of methylmercury levels in Arctic: U of T researchers

UTM Climate change slows reduction of methylmercury levels in Arctic: U of T researchers Igor Lehnherr, a researcher at U of T Mississauga, assessed the build-up of methylmercury, a dangerous neurotoxin, in Lake Hazen, one of Canada’s northernmost lakes (photo by Igor Lehnherr) Climate change may be slowing the reduction of methylmercury – a dangerous organic neurotoxin created by microbes that metabolize mercury – in Arctic waters despite a global movement to reduce industrial mercury emissions. That is among the findings of Igor Lehnherr and his research team at the University of Toronto after assessing the build-up of methylmercury in Lake Hazen, one of Canada’s northernmost lakes.

Blake hazenIgor lehnherrUniversity of torontoEnvironmental science technologyEnvironmental scienceஏரி ஹஜென்பல்கலைக்கழகம் ஆஃப் டொராண்டோசுற்றுச்சூழல் அறிவியல் தொழில்நுட்பம்சுற்றுச்சூழல் அறிவியல்

Using complementary disinfection strategies to make swimming pools safer

Swimming in indoor or outdoor pools is a healthy form of exercise and recreation for many people. However, studies have linked compounds that arise from chlorine disinfection of the pools to respiratory problems, including asthma, in avid swimmers.

Susan richardsonEmily hendersonEnvironmental science technologyEnvironmental scienceSwimming poolசூசன் ரிச்சர்ட்சன்எமிலி ஹென்டர்சன்சுற்றுச்சூழல் அறிவியல் தொழில்நுட்பம்சுற்றுச்சூழல் அறிவியல்நீச்சல் பூல்

Road Salt: Researchers look at vegetables and juices for alternatives to salt

Kathy Johnson / Great Lakes Now, Detroit Public TV Salt-speckled sidewalks, driveways and highways are synonymous with winter in the Great Lakes region. But while road salt is highly effective at deicing surfaces, the safety that salt provides for humans places a heavy burden on freshwater ecosystems. “We have an unhealthy addiction to road salt,” said Claire Oswald, a hydrologist and associate professor at Ryerson University in Toronto, Ontario. Multiple studies dating back to the 1970s have shown that road deicing salt has a negative impact on soil, vegetation, wildlife, surface water, groundwater and human health. A 1984 study conducted by the Michigan Legislative Science Office states road deicing salts, “are contributing to major changes in the Great Lakes ecosystem,” particularly on sensitive environments like wetlands, ponds and streams. Additionally, the legislative study found road salts are contributing to a general degradation of groundwater quality for

Great lakesUnited statesOakland countyRoyal oakCraig brysonClaire oswaldDanelle haakeEnvironmental science technologyRyerson universitySmart about salt council in waterlooMichigan legislative science officeCanadian water quality guidelinesIllinois riverwatchPublic actOakland county road commissionEnvironmental science

New Method of Treating Swimming Pools Could Make Them Safer and Healthier

New Method of Treating Swimming Pools Could Make Them Safer and Healthier
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Making swimming pools safer by reducing chlorine disinfection byproducts

E-Mail Swimming in indoor or outdoor pools is a healthy form of exercise and recreation for many people. However, studies have linked compounds that arise from chlorine disinfection of the pools to respiratory problems, including asthma, in avid swimmers. Now, researchers reporting in ACS Environmental Science & Technology have found that using a complementary form of disinfection, known as copper-silver ionization (CSI), can decrease disinfection byproducts and cell toxicity of chlorinated swimming pool water. Disinfecting swimming pool water is necessary to inactivate harmful pathogens. Although an effective disinfectant, chlorine can react with organic matter and compounds introduced by swimmers, such as those in sweat, urine, sunscreens and cosmetics, to produce disinfection byproducts (DBPs). Epidemiological studies have linked DBPs to health problems, including respiratory issues, bladder cancer, and pregnancy and birth complications. One way to reduce the amount of adde

United statesSusan richardsonEnvironmental science technologyUs congressNational science foundationAmerican chemical societyUniversity of south carolina magellan scholarshipEnvironmental scienceSouth carolina magellan scholarshipGuangxi medical university training programDistinguished young scholarsNational scienceCell biologyMarine freshwater biologyChemistry physics materials sciencesHydrology water resources