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Electronic pH meter in a glass of water. TDS measurement of water. poor water quality, high values of salt impurities, blurred background of nature
Female biochemist or infectious disease specialist conducts a chemical test of water against the background of a sewer with leaking water
Personnel in the laboratory are mixing industrial glue, wearing gloves, professional protective clothing
Mature woman collected river water sample for analysis in a test tube and recorded the experimental results in the tablet. Environmental research.
A water pollution sample in the test tube close up.
Scientist examing toxic water.
Mid Adult Biologist Measuring PH Value of Water on Field Directly in Water Stream
Testing water with a water parameter meter, such as pH, conductivity, Ta, redox and oxygen.
Sample water from the river for analysis. Hand in glove holding a test tube
Close-up scientist hand with a white PPE suit and nitrile gloves collect sample waste water into a flask for laboratory water analysis, industrial and environmental concept
Water samples were collected in industrial canals for inspection
Mature woman collected river water sample for analysis in a test tube and recorded the experimental results in the tablet. Environmental research.
Climate change concept, wooden thermometer immersed in water
Caucasian ginger haired Caucasian woman photographer in squatting position, takes photos on the lake bank in a sunny winter park. Profile view
Environmental Engineers Take Water Samples Into Bottles at Rotten Smelly Pond Water Sources, May Be Contaminated by Toxic Waste or Suspicious Pollution Sites.
An unrecognizable person leaning over and taking a sample of water from a river stream in Hexham and checking the water for traces of plastics and pollution.
Biologist that collects data on temperature of a water course for the analysis of its pollution and for the study of its features.
Environmental Scientist Examining Wastewater from factory at industrial estate
Nature, science and a woman with water for research, test for pollution and bacteria. Biology, sustainability and a scientist looking at a sample from a river for ecology inspection and analytics
She uses binoculars
oil in container, Laboratory Quality Testing Concepts, Scientific experiments for industry
Low level of a water reservoir in São Paulo, Brazil - Pedro Beicht Dam
A person in a lab coat is holding two beakers with clear liquids
Man standing on the hill and looking on beautiful view on caminito del ray river
Female Environment Researcher Examining Presence of Algae in Squatting Position near a Frozen Mountain Lake
Testing the quality of water in the industrial estate's drainage sources by biologists using experimental kits.
field researcher biologist examines a sample of soil in a test tube against a dry marsh
The Camargue was designated a Ramsar site as a \
chlorine solution in glass, Chlorine is used to kill bacteria or to perform experiment in laboratory
Hiking man looks through binoculars
Free Images: "bestof:Photograph of Sig Olson Testing the Temperature of the Water - NARA - 2128749.tif Scope and content Original caption Sig Olson is shown testing the temperature"
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