Complex organomineral fertilizers and meliorants – a new eco-friendly approach to phosphogypsum utilization

Abstract

One of the modern approaches to solving environmental problems of accumulation and deposition of production and consumption waste is the implementation of “green economy” and “closed cycle” economy models. This approach makes it possible to increase the resource utilization rate and reduce the negative impact on the environment. The study of the possibility of joint disposal of waste from various industries, for example agricultural and industrial waste, is promising in this area. The analysis of the current state of work in this direction is carried out, using the example of the possibilities of joint utilization of phosphogypsum and organic waste. A new eco-friendly approach to the utilization of a large-tonnage secondary material resource – phosphogypsum together with organic waste is proposed. Phosphogypsum acts as a matrix for the production of complex organomineral fertilizers and meliorants of complex composition, the introduction of the organic component of fertilizers is carried out in the finished and neutralized liquid phase. Agricultural waste, municipal waste, s ewage sludge can be the raw materials for the organic component. The effectiveness of the complex organomineral fertilizer an d meliorant based on phosphogypsum (90% by weight) and the liquid fertilizer “Rabiol” with the inclusion of a highly selective sorbent based on molecular imprinted polymers to imazamox, a resistant herbicide of the imidazolinone class, is shown.