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BQ 3A News > Blog > UK > From Roman drains to historic filters, those artefacts display how answers to water contamination have advanced
UK

From Roman drains to historic filters, those artefacts display how answers to water contamination have advanced

July 1, 2025
From Roman drains to historic filters, those artefacts display how answers to water contamination have advanced
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A brand new exhibition in London (open till February 2026) known as Thirst: Looking for freshwater highlights how civilisations have precious – and been intrinsically related to – protected, blank water.

As a chemist, I analysis how freshwater is polluted by way of fashionable civilisation. Commonplace contaminants in rivers come with prescribed drugs,
microplastics
(which degrade additional when uncovered to daylight and wave energy), and eternally chemical substances or per- and polyfluoroalkyl elements (PFAS) (a few of which might be carcinogenic).

Artificial poisonous chemical substances are offered into the surroundings from the goods we make, use and eliminate. This wasn’t an issue centuries in the past, the place we had a unconditionally other production business and applied sciences.

Some, comparable to PFAS from stain-resistant textiles or nonstick fabrics comparable to cookware, can also be in particular tricky to take away from wastewater. PFAS don’t degrade simply, they face up to typical warmth therapies and will simply cross via wastewater therapies, in order that they contaminate rivers or lakes which might be resources of our consuming water.

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Checking out for pollution is much more vital in growing countries that lack sanitation and face drought or flooding.
Having to give protection to and preserve consuming water and its resources is as related nowadays because it at all times has been.

For this exhibition, curator on the Wellcome Assortment in London, Janice Li, has decided on 125 ancient items, images and feats of engineering that hyperlink to drought, rain, glaciers, rivers and lakes. Those 3 artefacts from Thirst illustrate how our dating with water contamination has advanced:

1. Historical water filters

Constructed from herbal fabrics comparable to clay, water jug filters had been used for centuries in each and every continent by way of historic civilisations. They display that purifying water for consuming was once common. The sand and soil debris that naturally get suspended in water and got rid of by way of those filters would have carried microbes.

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broken arabic jug

Water jug filters with Arabic inscription, present in Egypt, courting again to 900-1,200.
Victoria and Albert Museum London/Wellcome Assortment, CC BY-NC-ND

However in earlier period, prescribed drugs and different medication, insecticides, eternally chemical substances and microplastics shouldn’t have been an issue. The ones filters may paintings somewhat smartly regardless of being made of easy fabrics with large pores.

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As of late, the ones historic filters would not be efficient. Fashionable water filters are made the usage of extra complicated fabrics which normally have small pores (known as micropores and mesopores). As an example, filters regularly come with activated carbon (a extremely porous form of carbon that may be manufactured to seize contaminants) or membranes that clear out water. Most effective then is it protected for other people to drink.

2. Roman water pipes

Lead water pipes (referred to as fistulae) have been helpful portions of a somewhat complicated plumbing device that disbursed consuming water all over Roman towns. They’re nonetheless commonplace in water techniques in our towns nowadays. In the United States, there are about 9.2 million lead carrier strains in use. Publicity to steer reasons critical human well being issues. Lead publicity, no longer essentially from consuming water best, was once attributed to greater than 1.5 million deaths in 2021.

old lead water pipe on black background.

A Roman lead water pipe that dates again to 1-300CE.
Courtesy of Wellcome Assortment/Science Museum Crew., CC BY-NC-ND

It’s now understood that lead is neurotoxic and it will possibly diffuse or unfold from the pipes to consuming water. Lead from paints and batteries, together with automobile batteries, too can contaminate consuming water.

To offer protection to us from lead leaching or flaking off from pipes, some executive companies are calling for the substitute of lead pipes with copper or plastic pipes. Water firms mechanically upload phosphates (mined powder that comprises phosphorus) to consuming water to lend a hand seize possible lead contamination and make it protected to drink.

3. The horror of bad water

One cool animated film titled The Monster Soup by way of artist William Heath (1828) is a part of the Wellcome Consider’s everlasting assortment. The graphics learn “microcosms dedicated to the London Water companies” and “Monster soup, commonly called Thames Water being a correct representation of the precious stuff doled out to us”. The caricature presentations a woman so terrified on the sight of microbes in river water from the Thames that she drops her cup of tea.

poster of Monster Soup

Monster Soup by way of William Heath.
Courtesy of the Wellcome Assortment., CC BY-NC-ND

Even nowadays, many of us stay stunned on the poisonous contamination in rivers and sewage air pollution prevents other people from swimming.

Through 2030, 2 billion other people will nonetheless no longer have safely controlled consuming water and 1.2 billion will lack elementary hygiene services and products. Consuming water will nonetheless be infected by way of micro organism comparable to E. coli and different bad pathogens that reason waterborne sicknesses. So advancing applied sciences to filter contamination will probably be simply as the most important one day as it’s been prior to now.

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