alexa Abstract | Formaldehyde Fixation Blocks as a Mitigating Tool of Waste Disposal

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This study focused on the product development of fixation blocks as mitigating waste disposal of formaldehyde. With the objectives of producing a proper waste disposal and alleviate the amount of formaldehyde used in Science laboratories and other scientific experiments, the researchers used cement as a stabilizer with different measurement together with the calcium containing materials such as calcium hydroxide, calcium carbonate and plaster of paris. Tests for compression and flexure were done to select the best product among the mixtures used in the study. Findings revealed that the best mixture for formaldehyde fixation block is the 25% calcium hydroxide, 75% cement and 40% formaldehyde. Based from the test of formaldehyde leachate using Colorimetric-Nash Method with reference of Japanese International Standard, for exposed and non-exposed fixation blocks, 8.84 mg/L (ppm) for exposed set-up and 7.38 mg/L(ppm). The range of formaldehyde leachate is moderate level only and within the range of 5 to 20mg/L(ppm). Furthermore, test of formaldehyde leachate identified the calcium hydroxide is the best binder of formaldehyde among the given components of mixtures used in the study. With this, formaldehyde fixation block is considered as the best mitigating tool for hazardous waste disposal such as formaldehyde.

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Author(s): Reynaldo O Baarde PE and Josephine E Tondo*


Compression, Flexure, Formaldehyde, Leachate, Plant sciences and Environmental sciences

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