Preparation method for modified biological carbon which efficiently adsorbs soil inorganic phosphorus and dissolves organic phosphorus at same time and application

Abstract

The invention provides modified biological carbon which efficiently adsorbs soil inorganic phosphorus and dissolves organic phosphorus at the same time. The modified biological carbon is prepared according to the following steps: (1) collecting air-dried yak excrement, smashing the collected yak excrement, and sieving the smashed yak excrement; (2) preparing an impregnating liquid containing magnesium ions with a certain concentration by using magnesium chloride hexahydrate; (3) mixing the sieved yak excrement with the modification impregnating liquid uniformly according to a proportion; (4) placing the mixture of the treated yak excrement and the impregnating liquid in a shaking bed, and performing impregnation fully; (5) filtering impregnated yak excrement out, placing filtered yak excrement in a drying oven, and performing drying; and (6) performing slow-speed pyrolysis on dried yak excrement in a muffle furnace under nitrogen protection to obtain the modified biological carbon. According to the invention, the dried yak excrement is fired into the modified biological carbon, thus high-efficiency recycling of biological matter is realized, the modified biological carbon can efficiently adsorb the soil inorganic phosphorus and dissolve the organic phosphorus at the same time, and agricultural non-point source pollution is effectively controlled.

Description

technical field [0001] The invention relates to the preparation of a modified biochar that efficiently and simultaneously adsorbs soil inorganic phosphorus and dissolved organic phosphorus, and is applied to the control of farmland phosphorus non-point source pollution, belonging to the field of water pollution control. Background technique [0002] In recent years, with the rapid development of sewage treatment technology, point source pollution has gradually been effectively controlled, but agricultural non-point source pollution is still a thorny problem, and it has become the main pollution source of water eutrophication in my country. At present, the control of the source of pollutants, the interception of pollutant loss paths, and the restoration of polluted land are the three major measures to control agricultural non-point source pollution. Among them, the control of the source of pollutants is the most effective prevention and control measure, which can not only ach...

AI Technical Summary

Problems solved by technology

As a large agricultural country, my country's agricultural waste is mainly straw and animal manure, with a huge annual output, but the effective utilization rate is low, and the long-term open-air accumulation of manure will pollute groundwater with runoff.

Images