Simultaneous solidification of potassium and phosphorus using rice straw charcoal and saturated phosphorus adsorbent

International Journal of Recycling Organic Waste in Agriculture

مقاله 1، دوره 4، شماره 2، شهریور 2015، صفحه 67-72   

شناسه دیجیتال (DOI): 10.1007/s40093-015-0086-2

نویسندگان

Akagi Koutarou¹؛ Uemoto Seigo¹؛ Hiroyuki Harada¹؛ Seichiro Oura²؛ Biplob Kumar Biswas³؛ Takanori Watari²؛ Yoshiharu Mitoma¹

¹Prefectural University of Hiroshima

²Saga University

³Jessore University of Science and Technology

چکیده

Phosphorus (P) ore is an expensive and limited resource that will be depleted in a few decades if the current global consumption rate continues. Japan, one of the most developed countries in the world, relies completely on imported phosphate rock for P. Potassium (K) ore, which is equally important for continuous development, is also becoming increasingly expensive. The recovery of P and K is therefore important for continuous and sustainable development. In this study, concentrated P (obtained from eluent) and K (obtained through alkali leaching of rice straw charcoal) were recovered as potassium magnesium phosphate (PMP) through the controlled addition of magnesium (Mg). A PMP crystal was produced when an equimolar (with respect to P) Mg solution was added to the leaching solution (rich in P and K) at a pH range of 11–12. Thus, the production of PMP in a crystalline form demonstrates the huge scope for the recycling of limited resources.

کلیدواژه‌ها

Potassium magnesium phosphate. Desorption. Extraction. Solidification