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Preparation method for adsorbing material for removing cadmium from slightly-polluted water body

An adsorption material, micro-pollution technology, applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., to achieve the effect of large output of raw materials, convenient operation and low cost

Inactive Publication Date: 2014-11-19
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the traditional method, the present invention invents a preparation method for cadmium adsorption material for removing micro-polluted water bodies, selects sugarcane non-grain biomass as the main raw material, and prepares non-grain biomass to remove cadmium adsorbent, which is a natural renewable, Sorbent that is odorless and does not pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Take the purchased fresh bagasse that has just been squeezed, cut the long bagasse into thin strips by hand, put it in a pressure cooker, add distilled water until the bagasse is submerged, and boil the water for 30 minutes to remove sugar and other soluble substances After that, place it in a hot air oven at 120°C and dry it for 36 hours, take out the dried bagasse, pulverize it with a Chinese herbal medicine grinder, and pulverize it for 1 hour; put the dried bagasse in the container, add 40ml of 20% Stir the NaOH solution evenly with a glass rod, let it fully stir at room temperature for 1 hour, so that the alkalization is relatively complete; pour the fully alkalized bagasse into the suction filter funnel, and after suction filtration to neutrality, place it in the laboratory Dry in an oven at 88°C for 24 hours; take the dried cellulose in a container, add 40ml of 20% H 3 PO 4 The aqueous solution was pre-expanded for 12 hours. Add 5ml85%H after pre-expansion 3 P...

example 2

[0017] Take the purchased fresh bagasse that has just been squeezed, cut the long bagasse into thin strips by hand, put it in a pressure cooker, add distilled water until the bagasse is submerged, and boil the water for 35 minutes to remove sugar and other soluble substances After that, place it in a hot air oven at 120°C and dry it for 36 hours, take out the dried bagasse, grind it with a Chinese herbal medicine grinder, and pulverize it for 1.5 hours; put the dried bagasse in the container, add 40ml of 20% Stir the NaOH solution evenly with a glass rod, let it fully stir at room temperature for 1 hour, so that the alkalization is relatively complete; pour the fully alkalized bagasse into the suction filter funnel, and after suction filtration to neutrality, place it in the laboratory Dry in an oven at 94°C for 24 hours; take the dried cellulose in a container, add 40ml of 20% H 3 PO 4 The aqueous solution was pre-expanded for 12 hours. Add 5ml85%H after pre-expansion 3 PO...

example 3

[0019] Take the purchased fresh bagasse that has just been squeezed, cut the long bagasse into thin strips by hand, put it in a pressure cooker, add distilled water until the bagasse is submerged, and boil the water for 40 minutes to remove sugar and other soluble substances After that, place it in a hot air oven at 120°C and dry it for 36 hours, take out the dried bagasse, grind it with a Chinese herbal medicine grinder, and pulverize it for 2 hours; put the dried bagasse in the container, add 40ml of 20% Stir the NaOH solution evenly with a glass rod, let it fully stir at room temperature for 1 hour, so that the alkalization is relatively complete; pour the fully alkalized bagasse into the suction filter funnel, and after suction filtration to neutrality, place it in the laboratory Dry in an oven at 100°C for 24 hours; take the dried cellulose in a container, add 40ml of 20% H 3 PO 4 The aqueous solution was pre-expanded for 12 hours. Add 5ml85%H after pre-expansion 3 PO ...

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PUM

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Abstract

The invention relates to a preparation method for an adsorbing material for removing cadmium from a slightly-polluted water body, and belongs to the field of wastewater treatment. The preparation method comprises the following steps: manually cutting fresh bagasse into small strips; putting the small strips into a pressure cooker, adding distilled water and boiling to remove soluble substances, such as sugar; drying the boiled small strips into a hot air oven; crushing the dried small strips by using a Chinese herbal medicine crushing machine; putting the crushed bagasse into a container, and adding a NaOH solution into the crushed bagasse to obtain a mixture; stirring the mixture uniformly at room temperature by using a glass rod until the mixture is fully alkalified; pouring alkalified bagasse into a filtration funnel, and drying the bagasse after the bagasse is leached to be neutral; putting dried cellulose in a container, adding an aqueous solution of H3PO4 into the container for performing pre-expansion; adding the aqueous solution of the H3PO4 after the pre-expansion is performed; reacting the mixture in a water-bath kettle, wherein urea is used as a catalyst and methylbenzene is used as a solvent; washing a reaction product by using an alkali until the reaction product does not contain phosphate anions; converting an esterification reactant into an H-type ion exchanger by using an aqueous solution of HCl; and drying the H-type ion exchanger to obtain the adsorbent disclosed by the invention. According to the preparation method, the cost is low, the secondary pollution is avoided, and the requirement on resource recovery of solid waste is met.

Description

technical field [0001] The invention relates to a method for preparing an adsorption material for removing cadmium in slightly polluted water, belonging to the field of sewage treatment. Background technique [0002] In recent years, with the development of industries such as mining, metallurgy, and cadmium treatment, agricultural soil in my country has become increasingly polluted by cadmium. Since cadmium cannot be degraded by microorganisms in the soil, its half-life exceeds 20 years, and its pollution is an irreversible accumulation process; cadmium is also a heavy metal with strong biological mobility, which is easily absorbed and accumulated by plants. If it exceeds a certain limit, it will not only seriously affect the yield of crops , quality, and the edible part is very easy to accumulate in the human body through the food chain and endanger human health. Cadmium compounds are highly toxic and accumulative, causing chronic poisoning with an incubation period of 10 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 郭迎庆
Owner CHANGZHOU UNIV
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