Upcycling end-of-life vehicle waste plastic into flash graphene

Nature article about plastics from end-of-life vehicles can be upcycled - all together, without being sorted - into  graphene.

Abstract

Responsible disposal of vehicles at the end of life is a pressing environmental concern. In particular, waste plastic forms the largest proportion of non-recycled waste material from light-duty vehicles, and often ends up in a landfill. Here we report the upcycling of depolluted, dismantled and shredded end-of-life waste plastic into flash graphene using flash Joule heating. The synthetic process requires no separation or sorting of plastics and uses no solvents or water. We demonstrate the practical value of the graphene as a re-inforcing agent in automotive polyurethane foam composite, where its introduction leads to improved tensile strength and low frequency noise absorption properties. We demonstrate process continuity by upcycling the resulting foam composite back into equal-quality flash graphene. A prospective cradle-to-gate life cycle assessment suggests that our method may afford lower cumulative energy demand and water use, and a decrease in global warming potential compared to traditional graphene synthesis methods.

Read full from Nature

https://www.nature.com/articles/s44172-022-00006-7

Can We Generate Renewable Energy by Burning Trash? (cnbc.com)

(Via SlashDot) CNBC visited a company that burns trash from a California landfill, and then "harnesses steam to make enough electricity to power 18,000 homes in the area" — which turns out to be part of a surprisingly large industry: A portion of the waste comes from companies including American Airlines, Quest Diagnostics, Sunny Delight and Subaru.... Major retailers like Amazon also use this combustion method to dispose of returns they deem unfit to recycle, resell, or donate....

The U.S. is one of the most wasteful developed countries in the world. Of the record 292 million tons of waste generated by Americans each year, more than half is landfilled, about a third is recycled, and 12% is incinerated at waste-to-energy facilities, according to the World Bank. Online commerce poses a particular problem. Not only are internet purchases breaking records in terms of volume, but roughly 20% of items get returned, which is a higher number than for in-store purchases. Returns solutions provider Optoro says U.S. returns generate an estimated 5.8 billion pounds of landfill waste each year.
But the article also points out that more than half of U.S. states define waste-to-energy as a renewable energy source." Unlike landfills, many governments and non-governmental organizations consider it a source of greenhouse gas mitigation. That includes the U.S. Environmental Protection Agency, where Susan Thorneloe leads research on materials management.

U.S. climate experts say these are the three reasons the burning process produces a net reduction of greenhouse gasses. First, it keeps waste out of landfills, which emit methane that the EPA estimates is 86 times greater than carbon dioxide over a 20-year period. Second, waste-to-energy facilities reduce the need for mining because they recover 700,000 tons of metal each year. And finally, they produce energy, reducing the need to burn fossil fuels.... The steam can also be captured and piped up to a mile away to heat or cool entire buildings, like Target Field in Minneapolis....

The EPA estimates that for every megawatt-hour of electricity generated, waste-to-energy emits an average of just over half a metric ton of carbon dioxide equivalent gasses. Landfills emit six times that, and coal plants emit nearly double.
At least some scientists CNBC spoke to said that air pollution technology has advanced so much in the last two decades that most common toxins have largely been eliminated.

AIPG MN/WI 2022 Geology and Remediation Weekend

AIPG MN/WI 2022 Geology and Remediation Weekend (Sept 30 – Oct 2) - Join us for a gathering of professional geologists and their guests to view and listen to presentations and then visit the unique natural and human areas of the SE Minnesota and SW Wisconsin corners of our States. Successful Remediation and Investigation projects (including per fluorinated chemicals PFAS and emerging contaminants ECs) will be showcased by local Consultants, Regulatory and University professionals, and students. Event participants will be offered field trip options to Bluff Natural Areas or Karst Areas, and a Cruise on the Mississippi River to #7 Dam.

For registration and more information please see:

https://aipg.org/page/2022MNWIGeoWeekend

The Most Detailed Map of Cancer-Causing Industrial Air Pollution in the U.S.

Propublica has put together a remarkable map of EPA data of dangerous air pollution.

See it here
https://projects.propublica.org/toxmap/

AP analysis finds growing number of poor, high-hazard dams

An Associated Press analysis tallied more than 2,200 high-hazard dams in poor or unsatisfactory condition across the U.S. — up substantially from a similar AP review conducted three years ago. The actual number is likely even higher, although it's unclear because some states don't track such data and many federal agencies refuse to release details about their dams' conditions.

The nation's dams are on average over a half-century old and often present more of a hazard than envisioned when designed because homes, businesses or highways have cropped up below them. Meanwhile, a warming atmosphere can bring stronger storms with heavier rainfall that could overwhelm aging dams.

"All of a sudden, you've got older dams with a lower design criteria that now can potentially cause loss of life if they fail," said Del Shannon, an engineer who is president of the U.S. Society on Dams.

"The number of deficient, high-hazard dams is increasing," he said, adding that without investment in upgrades, that number will continue to rise.

Decades of deferred maintenance has worsened the problem. But a changing climate and extreme floods — such as the one that caused the failure of two Michigan dams and the evacuation of 10,000 people in 2020 — have brought a renewed focus to an often overlooked aspect of America's critical infrastructure.

The $1 trillion infrastructure bill signed last year by President Joe Biden will pump about $3 billion into dam-related projects, including hundreds of millions for state dam safety programs and repairs.

Source: AP

EPA takes three new actions to address PFAS

The agency is developing a new broad PFAS testing method, a PFAS development for the NPDES program, and ambient water quality criteria to protect aquatic life from PFA.


The U.S. Environmental Protection Agency (EPA) has announced three actions to protect communities and the environment from per- and polyfluoroalkyl substances (PFAS) in waters.

"EPA is using all available tools to address PFAS contamination as part of a broader, whole-of-government effort to protect communities across the country from these chemicals," said EPA Administrator Michael S. Regan. "Today's actions help protect the health of all Americans as we deliver on our commitment to research, restrict, and remediate PFAS."

A New Testing Method
EPA is publishing a new method that can broadly screen for the presence of PFAS in water at the part per billion level. EPA's new Draft Method 1621, the Screening Method for the Determination of Adsorbable Organic Fluorine (AOF) in Aqueous Matrices by Combustion Ion Chromatography (CIC), provides an aggregate measurement of chemical substances that contain carbon-fluorine bonds. PFAS are a common source of organofluorines in wastewater.

The National Pollutant Discharge Elimination System (NPDES) program interfaces with many pathways by which PFAS travel and are released into the environment and ultimately impact people and water quality. EPA is seeking to proactively use existing NPDES authorities to reduce discharges of PFAS at the source and obtain more comprehensive information through monitoring on sources of PFAS.

EPA is also developing national recommended ambient water quality criteria for PFAS to protect aquatic life. The agency is proposing the first Clean Water Act aquatic life criteria for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS)—two of the most well-studied chemicals in this group. The criteria are intended to protect aquatic life in the United States from short-term and long-term toxic effects of PFOA and PFOS.

Please read full from:
https://www.waterworld.com/drinking-water/potable-water-quality/press-release/14275856/epa-takes-three-new-actions-to-address-pfas