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Development and validation of a novel suspended particulate matter sampling device for analysis of particle-bound microbial communities
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Researchers developed and tested a new device called the microParticle Obtaining Trap for collecting suspended particles from water, achieving recovery rates above 90% for particles 100 micrometers and larger. The device was successfully used to sample groundwater, lake water, and river water, capturing particles separated by size. It offers a simpler and more affordable alternative to existing sampling methods, making it easier to study particle-bound microbial communities in hard-to-reach water systems.
Biotic and abiotic materials attachment to suspended particulate matter in aquatic systems can increase their toxicity and health impacts and has led to an increased need for consistent sampling across various compartments. Sedimentation traps and continuous flow centrifuges are the traditional tools for sampling suspended particulate matter, while manta trawls have been widely used for surface water sampling of suspended or floating microplastics. Limitations, however, exist in the cost of sampling and infrastructure needed to deploy such devices. Here we report on the construction and usage of a novel suspended particulate matter sampling device, the microParticle Obtaining Trap (mPOT). Quality control testing of the mPOT showed suspended particle recovery rates of >90% for particles 100 µm and larger, while field sampling of groundwater, lake and river water shows consistent, size-fractionated recovery of particulate matter. The mPOT is well suited to sample systems not easily accessible by boat or for particles not commonly recovered by common suspended particulate matter sampling and for collection of particles smaller than 300 µm in size.
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