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Rape straw modified biochar composite material for removing quizalofop-p-ethyl in water body and preparation method and application of rape straw modified biochar composite material

A technology of rape straw and composite material, which is applied in the directions of water pollutants, chemical instruments and methods, and other chemical processes, can solve the problems of low selectivity and small adsorption capacity of natural cellulose, and achieves simple preparation process and reduced processing cost. , good adsorption effect

Active Publication Date: 2020-04-17
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, natural cellulose has small adsorption capacity and low selectivity, so it must be modified or compounded with materials with good adsorption capacity to improve its adsorption capacity for these organic pollutants.

Method used

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  • Rape straw modified biochar composite material for removing quizalofop-p-ethyl in water body and preparation method and application of rape straw modified biochar composite material
  • Rape straw modified biochar composite material for removing quizalofop-p-ethyl in water body and preparation method and application of rape straw modified biochar composite material
  • Rape straw modified biochar composite material for removing quizalofop-p-ethyl in water body and preparation method and application of rape straw modified biochar composite material

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Experimental program
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Effect test

Embodiment 1

[0029] Example 1: Preparation of Rapeseed Straw Modified Biochar Composite Material (In the specific embodiment, the composite material of modified rape straw biochar-graphite phase carbon nitride-iron is referred to as rape straw modified biochar composite material for short)

[0030] Step 1: Preparation of Rapeseed Straw Biochar

[0031] Remove the branches of the harvested rape stalks, remove the remaining rape leaves, break them off, wash them with distilled water, transfer them to an oven for drying at about 105°C, take them out and put them into a high-speed universal grinder for crushing, and pass through a 100-mesh sieve. Transfer to a crucible, seal it with tin foil paper, put it into a muffle furnace, set the carbonization temperature at 650°C, heat it with nitrogen gas at a heating rate of 5°C / min, and then calcinate for 2 hours, and then cool down to room temperature to obtain rapeseed straw biochar.

[0032] Step 2: Biochar treatment of rape straw

[0033] Accura...

Embodiment 2

[0039] Example 2: Application of Rapeseed Straw Modified Biochar Composite Material (Composite Material of Modified Rapeseed Straw Biochar-Graphite Phase Carbon Nitride-Iron)

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Abstract

The invention discloses a rape straw modified biochar composite material for removing quizalofop-p-ethyl in a water body and a preparation method and application of the rape straw modified biochar composite material. The rape straw modified biochar composite material is prepared by modifying rape straw biochar with nitric acid and then loading inorganic particles of graphite phase carbon nitride and magnetic particles containing iron on the rape straw biochar. The rape straw modified biochar composite material prepared by the invention has a remarkable quizalofop-p-ethyl adsorption effect, andis easy to recycle and suitable for removing quizalofop-p-ethyl in the water body; and as the recycled rape straw modified biochar composite material is exposed to the sun for photodegradation, adsorbed quizalofop-p-ethyl can be degraded, so secondary pollution to the environment is avoided.

Description

technical field [0001] The invention relates to the removal of quizalofop-pyl in water, in particular to a rape straw modified biochar composite material for removing quizalofop-p-p in water, a preparation method and application thereof. Background technique [0002] With the accelerated development of urbanization in our country, a large number of rural labor force has transferred to the city, resulting in a serious shortage of rural labor force. In addition, in recent years, the large-scale land planting and management in rural areas has accelerated, and manual weeding has gradually decreased. Chemical weeding is increasingly accepted by farmers. Herbicides It can effectively kill weeds in farmland, save labor and time, and play a huge role in agricultural production. Although the positive effects of herbicides cannot be ignored, as a chemical drug, herbicides have strong stability. The long-term, large-scale, repeated, and especially unreasonable use of chemical herbicide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/34C02F101/38
CPCB01J20/20B01J20/0259B01J20/06C02F1/283C02F1/281C02F2101/40C02F2101/38C02F2101/34
Inventor 杨丽华蒋方舟吴君兰蔡庚谌龚道新
Owner HUNAN AGRICULTURAL UNIV
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