Method for preparing water-retention fertilizer from aquatic plants

A technology for aquatic plants and fertilizers is applied in the field of subsequent utilization and treatment of aquatic plants to achieve the effects of improving soil structure and preventing the degradation of arable land structures.

Active Publication Date: 2011-02-02
溧阳常大技术转移中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to introduce a hydrophilic group-CH on a large amount of aquatic plant fibers produced by water body ecological restoration and pollution prevention and control projects by chemical modification. 2 COO - and-css - , and by adding the crosslinker FeCl 3 , AlCl 3 The method of such high-valent metal salts makes it form a network structure, thereby increasing its water absorption multiple, and the reaction formula is as follows:

Method used

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  • Method for preparing water-retention fertilizer from aquatic plants
  • Method for preparing water-retention fertilizer from aquatic plants
  • Method for preparing water-retention fertilizer from aquatic plants

Examples

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example 1

[0029] (1) Raw material selection method:

[0030] Wash and chop the salvaged water hyacinth, dry, crush, and sieve, and select 20-40 mesh hay powder for later use;

[0031] (2) Chemical modification method of aquatic plants (preparation of carboxyl fiber of aquatic plants):

[0032] Add 4g of water hyacinth powder and 80mL of 95% industrial ethanol mixed solution containing 3g of urea and 3gKOH into a 250mL three-neck flask, stir well, and place in a refrigerator at 2°C for 15h; take it out and place it in a heating mantle, and add 4g of Chloroacetic acid, when the temperature rises to 70°C, stir at constant temperature for 1.5h; at 70°C, continue the reaction, start to cool down after 1h, suction filter after the temperature drops to 30°C, and wash the filter cake 3 times with 85% ethanol aqueous solution. Dry at 60°C for 4h, grind the solid finely and set aside.

[0033] (3) Preparation method of water-retaining fertilizer:

[0034] Measure 100mL of distilled water into ...

example 2

[0036] The difference between this example and Example 1 is that the amount of chloroacetic acid is 2.0 g, the reaction temperature is 60° C., and the reaction time is 3 hours. Other preparation steps are the same as Example 1. Relative to the water hyacinth matrix, the potassium content was 11.3%, and the nitrogen content was 10.2%. The water absorption factor of this example is 20.

example 3

[0038] The difference between this example and Example 1 is that the amount of chloroacetic acid is 6.0 g, the reaction temperature is 50° C., and the reaction time is 8 hours. Other preparation steps are the same as Example 1. Relative to the water hyacinth matrix, the potassium content is 13.5% and the nitrogen content is 9.5%. The water absorption ratio of this example is 62.

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Abstract

The invention relates to a method for preparing water-retention fertilizer from aquatic plants, comprising the followings steps: using aquatic plants of water hyacinth, Potamogeton crispus L, and alternanthera philoxeroides as raw materials, using haloacetic acid and potassium salt thereof or carbon disulfide in alkaline solution containing potassium ion as chemical modifier, and using FeCl3 or AlCl3 as cross-linking agent so as to obtain aquatic plant fiber with water absorption and water retention property. In the invention, a large amount of aquatic plant fiber generated by ecosystem restoration of water and pollution prevention engineering is used so as to ensure long time operation of ecosystem restoration engineering. The water-retention fertilizer prepared by the invention can regulate water in soil, supply potassium fertilizer and nitrogen fertilizer in soil after applying since containing the potassium ion, ammonia water, and urea. The natural aquatic plant fiber is used as basis material to prepare water-retention fertilizer which can be completely biodegraded, can improve soil structure and can prevent hardening of tilled land.

Description

technical field [0001] The invention relates to a method for subsequent utilization and treatment of aquatic plants, in particular to a method for preparing water-retaining fertilizers by using aquatic plant bodies (such as water hyacinth, eye vegetable, water peanut, polygrass, and weed) to produce water body ecological restoration and pollution prevention and control. Background technique [0002] Water hyacinth, eye vegetable, water peanut, jucao, and weed are common freshwater plants. They are recognized as fast-growing plants, and they are also effective plants for water ecological restoration and pollution prevention and control. During their growth, they quickly absorb nutrients such as nitrogen and phosphorus in the water, and have strong sewage absorption capacity, so they are widely used in sewage purification and nutrient-rich water treatment. However, if the abundant aquatic plants are not cleaned up in time, they will block the river, affect the traffic, and eve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
Inventor 单玉华唐敏潘学林罗娜吴霰任海永李明时
Owner 溧阳常大技术转移中心有限公司
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