Desert plant biomass charcoal as well as preparation method and application thereof

The invention provides desert plant biomass charcoal and a preparation method and application thereof.The preparation method specifically comprises the steps that 1, desert plants are collected and dried to constant weight at high temperature; 2, desert plants and calcium oxide are put into water according to the proportion, cooked at high temperature for a period of time and then taken out, and the desert plants are crushed and sieved after being dried; step 3, carbonization treatment in a tubular furnace; 4, soaking with high-temperature steam in combination with a mixed solution of sulfuric acid, hydrochloric acid and zinc chloride for activation; step 5, washing with a mixed solution of sodium hydroxide and sodium carbonate to be neutral, and then performing ultrasonic treatment under a water bath condition to improve the adsorption performance; alkali metal ions in the desert plants can be effectively removed by using the acidic active agent, and a physical activation method and a chemical activation met