59results about How to "No secondary pollution will be introduced" patented technology

The invention belongs to the field of sewage treatment, in particular relates to a method for removing trace polycyclic aromatic hydrocarbon from water by utilizing the quick adsorption of a polylactic acid-caprolactone (P(LA / CL),7 / 3) electrospinning nanofiber membrane, which comprises the two steps of preparing the electrospinning nanofiber membrane and removing the trace polycyclic aromatic hydrocarbon from the water by utilizing the adsorption of the electrospinning nanofiber membrane, namely preparing the electrospinning nanofiber membrane with excellent adsorption performance from biodegradable polylactic acid-caprolactone (P(LA / CL),7 / 3) serving as a raw material by electrospinning technology, wherein the ratio of polylactic acid to the polycaprolactone during synthesis is 7:3; and reacting the electrospinning nanofiber membrane with mixed solution of polycyclic aromatic hydrocarbon at different concentrations to remove the polycyclic aromatic hydrocarbon from the water through adsorption. Through the method for removing the trace polycyclic aromatic hydrocarbon from the water through quick and efficient adsorption provided by the invention, over 80 percent of polycyclic aromatic hydrocarbon (the concentration range is between 1 and 10 micrograms / liter) can be removed from the water within 20 minutes through adsorption, an adsorbent has the advantages of simple preparation process and easy recycling; and the method has the advantages of easy operation, low cost, high efficiency and time conservation.

The invention aims at providing a novel leaf fertilizer accessory ingredient. A production method of the leaf fertilizer accessory ingredient is as follows: natural nano material compounds such as straw ash in a power plant are physically and chemically modified, so that the surface hydroxyl number is increased, and dispersion performance and absorption performance are improved, the leaf fertilizer nutrient is preferably absorbed by a micro nano structure of an accessory ingredient material and fixed by a coarse plant leaf, the adhesive ability of the leaf fertilizer on the plant leaf is improved, the drifting, eluviation loss and volatilization loss are reduced, the aims of prolonging lasting period and improving the nutrient utilization are achieved. According to the method, the main raw material is natural and environment-friendly and is free from the secondary pollution; and meanwhile, the fertilization dosage and the fertilization times are reduced, the labor and the cost are saved, and the environment pollution is reduced. The technology conforms to the leaf fertilizer development direction and has great market potential.

The invention discloses a composite coating agent for aloe gel carried deep submicron Ag and a method of using the composite coating agent for keeping aloe fresh and belongs to the field of fresh-keeping of fruits and vegetables. A synthetic method of the composite coating agent comprises the steps of selecting sodium dodecyl sulfonate and the like as a modifier of Ag, assisting by hydrochloric acid to regulate a pH value, carrying out reaction under the condition of heating and mixing to obtain modified deep submicron Ag, putting the deep submicron Ag, the aloe gel, glycerel monostearte and acetic acid in a magnetic heating mixer, and carrying out mixing and ultrasonic degassing to obtain the aloe gel / deep submicron Ag composite coating agent. With the adoption of the composite coating agent, a composite film can be prepared; after fresh aloe stems and leaves are treated by methods of selection by classifying, impurity removal by cleaning, finishing, slitting, rapid sterilization, coating, packaging and warehousing, the initial colors, the surface elasticity, the moisture and the nutritional ingredients of the fresh aloe stems and leaves can be effectively kept. The composite coating agent, the composite film and the method of using the composite coating agent for keeping the aloe fresh are easy to operate, are high in high performance cost ratio and have a wide prospect.