- ECAR consists of a container that can hold 600 liters of water pumped in directly from a nearby well.
- Inside, it’s fitted with a series of steel plates, and when a small voltage runs through the plates, that quickly dissolves iron in water, forming a type of rust.
- Arsenic binds to the rust as it forms, and then it falls to the bottom of tank, where it’s filtered out and collected as rusty sludge.
- The treated water is then pumped out, ready to drink.
Arsenic: out of groundwater and into concrete
— By Janet Fang on March 29, 2014, 2:13 PM PST
Concrete goes into lots of products including water pipes, plasters, stuccos, roofing materials and other building materials - with which people come into close contact. I think it was in the late 1800s that a popular paint and wall paper pigment was making people sick and killing some. The problem was traced to the pigments used - a combination of copper and arsenic making a beautiful blue green color - called Paris Green. The pigments vehicle aged releasing the pigment as a fine powder that slowly settled over households, clothes, beds, food, water and the people themselves - providing enough arsenic contact and consumption to be lethal.
The point here is controlling the applications of embed wastes like arsenic in concrete will be difficult and dangerous. Who knows? Maybe some enterprising hazardous waste company will secretly include a few radioactive wastes into concrete... if they haven't already
We will drink “Luminous Water” to save ourselves and then bathe at the Ganges River to save our souls.
So now that we have highways producing cancer causing fine particulate dust from tires we now can have eroding roads adding fine particulate arsenic to it also. Anyone like to sign up for higher lung cancer ?
So here's the scenario I see in 40 or 50 years, when some poor schlub decides to tear down or remodel his property: When he files for his permits, the local authority is going to do a little research (or require the owner to submit a core sample) and will respond that his home was constructed with this "contaminated" concrete, which now represents a "hazard". Instead of spending a few thousand dollars to have someone knock it down and simply haul it away in less than 12 hours, he now must hire a certified and approved ecological remediation firm, which will deploy a team of a dozen or so guys in hazmat suits and spend a week or more surgically disassembling the structure, hermetically sealing it all, and then carefully transporting to a hazardous waste disposal site. Cost? A hundred thousand or so.
So basically, we're just kicking the can down the road 40 or 50 years. At least there was a practical reason for asbestos to be used in construction 60 years ago...
Although this is great news, in perspective there are
About 2.6 billion people – half the developing world – lack even a simple ‘improved’ latrine and 1.1 billion people has no access to any type of improved drinking source of water. As a direct consequence:
- 1.6 million people die every year from diarrhoeal diseases (including cholera) attributable to lack of access to safe drinking water and basic sanitation and 90% of these are children under 5, mostly in developing countries;
- 160 million people are infected with schistosomiasis causing tens of thousands of deaths yearly; 500 million people are at risk of trachoma from which 146 million are threatened by blindness and 6 million are visually impaired;
- intestinal helminths (ascariasis, trichuriasis and hookworm infection) are plaguing the developing world due to inadequate drinking water, sanitation and hygiene with 133 million suffering from high intensity intestinal helminths infections; there are around 1.5 million cases of clinical hepatitis A every year.
How wonderful..I'd just worry that the sludge embedded in concrete will someday be found to be harmful.. i.e. asbestos, creosote, etc.