The hazards of adding formaldehyde to urine
Thread Content
Currently, many urea manufacturers add a certain amount of formaldehyde to molten urine in order to control the particle size of the urea particles. This can have subtle effects on the soil and environment during the final fertilization process, and the hazards resulting from such long-term accumulation cannot be ignored. Nowadays, green foods and pollution-free production are being promoted, so I raise this issue for discussion among all the experts.
Yes, I heard that some compound fertilizers also contain such substances, in order to achieve a better color – but that’s not acceptable
To increase hardness and surface smoothness, a chemical reaction occurs upon the addition of formaldehyde; if the amount added is appropriate, no residues will remain. However, fluctuations in the production process or improper amounts of formaldehyde added can lead to its residue, which poses serious risks
Yes, indeed some manufacturers now add formaldehyde in the production of fertilizers, especially nitrogen fertilizers. The main reasons for this are as follows: 1. To increase the particle strength and smoothness of the fertilizer, particularly in the case of nitrogen fertilizers; this is because an organic substance called urea-formaldehyde resin is formed, which possesses certain adhesive properties； 2. Regarding nitrogen fertilizer combined with formaldehyde, after being applied to the soil, the nitrogen fertilizer has a certain slow-release effect ；
The following web pages are all about the addition of formaldehyde to urea. Please visit the following links: http://bbs.hcbbs.com/viewthread.php?tid=95762&highlight=%C4%F2%CB%D8%2B%2B%BC%D7%C8%A9 http://bbs.hcbbs.com/viewthread.php?tid=81783&highlight=%C4%F2%CB%D8%2B%2B%BC%D7%C8%A9 http://bbs.hcbbs.com/viewthread.php?tid=67666&highlight=%C4%F2%CB%D8%2B%2B%BC%D7%C8%A9 http://bbs.hcbbs.com/viewthread.php?tid=102219&highlight=%C4%F2%CB%D8%2B%2B%BC%D7%C8%A9 http://bbs.hcbbs.com/viewthread.php?tid=83803&highlight=%C4%F2%CB%D8%2B%2B%BC%D7%C8%A9