and Integrated Pest Management - part - usaid

DESTRUCTION OF PESTICIDES AND CHEMICAL
WASTES BY MEANS OF A CEMENT KILN
W. A. Schimpf
Malaysian-German Pesticide Project
Crop Protection Branch, Department of Agriculture
Jalan Gallagher, 50480 Kuala Lumpur, Malaysia
(Present address: Talstr. 70, D-6000-Frankfurt M-56
West Germany)
Destruction of small quantities of chemical wastes without polluting the
environment is generally a concern in the field of plant protection. Different
methods are used for the treatment and/or destruction of various kinds of
pesticides depending on their chemical composition. The common pesticides
encountered may be grouped as follows:
* Carbamates
• Chloronitrophenol derivatives
* Organochlorine compounds
* Organophosphorus compounds
* Organomercury compounds
• Organotin compounds
* Pyridyl derivatives
* Phenoxyacetic acid derivatives
* Pyrethroids
* Triazine derivatives
* Thiocarbamates
* Inorganic compounds
* Organic solvents
Methods of waste management may also be grouped as follows:
Treatment
Stor Disosal
incineration impoundment injection wells
chemical alteration tanks impeundment
physical alteration waste piles landfills
biological decomposition containers land treatment
Incineration by means of special incinerators is the easiest method of waste
management and normally is not harmful to the environment. However,
inorganic substances (e.g., cupric oxide, cupric sulfate, cyartamide, hydrocyanic
acid, potassium cyanide, phosphine, zinc phosphide, thallous sulfate) and
pesticides which contain heavy metals (e.g., mercury compounds, tin and zinc
compounds) are not suitable for incineration. These substances should be treated
chemically or stored in chemical cumps.