Council of Scientific and Industrial Research

Daya Soni

Prabhat Kumar Gupta

Nahar Singh

Ravinder Kumar Kotnala

Chuen Jinn Tsai

Khem Singh

Vijay Narain Ojha

Dinesh Kumar Aswal

Prashant Patel

Rashmi

Sukhvir Singh

Shankar G Aggarwal

Tomoaki Okuda

Renu Pashricha

A sampler apparatus is disclosed. The sampler apparatus comprises an impactor assembly comprising a nozzle plate, an impaction plate, and a filter unit. The nozzle plate comprises a plurality of nozzles for channelling an air stream through the sampler apparatus. The impaction plate is adapted to collect particulate matter having size equal to or greater than a threshold size. The filter unit is adapted to collect particulate matter having size less than or equal to the threshold size. The sampler apparatus further comprises a control assembly coupled with the impactor assembly. The control assembly comprises one or more flow control devices to maintain a predetermined air-flow rate of the air stream within the sampler apparatus.

Particulate matter sampler

Zinc peroxide nanoparticles, used for arsenic and chromium removal, were synthesized using zinc acetate di-hydrate as precursors in ammonical water medium at room temperature.

Process for preparing zinc peroxide nanoparticles

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New Delhi, India

Daya Soni