Method for preparing light cement-based graphene oxide composite adsorption material

A technology of graphene composite and cement-based materials, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost of use, low efficiency of adsorption of heavy metal ions, and difficulties in recycling and regeneration and other problems, to achieve the effects of low preparation cost, easy control of performance indicators, and mature preparation process route

Active Publication Date: 2016-10-12
宁夏亿昀特种工程材料有限公司
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AI Technical Summary

Problems solved by technology

At present, these materials have been applied, and their adsorption capacity and effect have their own characteristics, but there are problems such as low adsorption efficiency, difficult recovery and regeneration, and high cost of use for the adsorption and removal of heavy metal ions.

Method used

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preparation example Construction

[0011] The preparation of the lightweight cement-based material: 600-650 parts of Portland cement labeled 42.5, 10-18 parts of sand with a fineness of 2.5-2.8, 200-230 parts of water and 100-120 parts of graphene oxide dispersion Add 0.4-0.7 parts of foaming agent in turn and stir evenly, and then add 0.4-0.7 parts of foaming agent to stir and foam to prepare foamed lightweight cement-based materials, and control the density of foamed cement-based materials to 0.5-0.6g / cm 3 , with a pore size of 0.1-1.4 mm, steam-cured in a steam-curing room at 40°C for 3-5 hours, taken out and left for 24-48 hours, the measured compressive strength reached 0.9 MPa, and a lightweight cement-based material was obtained.

[0012] Preparation of the lightweight cement-based graphene oxide composite adsorption material: The prepared lightweight cement-based material is immersed in the graphene oxide nanosheet dispersion for 3-5 hours, and steamed in a steam-curing room at 80-90°C for 3 ~3 hours, i...

Embodiment 1

[0018] Step 1: Preparation of lightweight cement-based materials

[0019] Add 600~650 parts of 42.5 Portland cement, 10~18 parts of sand with a fineness of 2.5~2.8, and 300~330 parts of water in sequence and stir evenly, then add 0.4~0.7 parts of foaming agent and stir to prepare foam Foam light cement-based material, control the density of foam cement light material to 0.5~0.6g / cm 3 , with a pore size of 0.1-1.4 mm, steam-cured in a steam-curing room at 40°C for 3-5 hours, taken out and left for 24-48 hours, the measured compressive strength reached 0.9 MPa, and a lightweight cement-based material was obtained.

[0020] Step 2: Preparation of lightweight cement-based graphene oxide composite adsorption material

[0021] The prepared lightweight cement-based material is immersed in the graphene oxide nanosheet dispersion for 3 to 5 hours, steamed in a steam curing room at 80 to 90°C for 4 to 6 hours, and the steamed light cement material is second Immerse in the graphene oxi...

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Abstract

The invention discloses a light cement-based graphene oxide composite adsorption material. The light cement-based graphene oxide composite adsorption material comprises, by weight, 600-650 parts of silicate cement with a mark of 42.5, 10-18 parts of sand with the fineness of 2.5-2.8, 200-230 parts of water, 0.4-0.7 part of foaming agents and 200-240 parts of graphene oxide nanometer laminar dispersion liquid. The invention further discloses a method for preparing the light cement-based graphene oxide composite adsorption material. The light cement-based graphene oxide composite adsorption material and the method have the advantages that heavy metal ions such as Cr<3+>, Cr<6+>, Ni<2+>, Cu<2+>, Pb<2+>, Zn<2+>, As<5+> and Hg<2+> in wastewater can be adsorbed and removed by the light cement-based graphene oxide composite adsorption material, the removal rate can reach 98% at least, the light cement-based graphene oxide composite adsorption material is high in adsorption capacity, adsorption rate and selectivity and easy to separate and regenerate, and the like.

Description

technical field [0001] The invention belongs to the technical field of lightweight cement-based graphene oxide composite adsorption materials, and in particular relates to a preparation method of lightweight cement-based graphene oxide composite adsorption materials. technical background [0002] Currently, metal ions, especially heavy metal ions such as Cr 6+ 、Ni 2+ 、Cu 2+ , Pb 2+ , Zn 2+ 、As 5+ , Hg 2+ The treatment of industrial wastewater has always been a hot research issue in environmental governance (Wang Weijun, Geng Cunzhen, Research Progress in the Treatment of Heavy Metal Wastewater with Adsorbent Materials, Environmental Science and Technology, 2014, 27 (1): 58-62). At present, there are many methods for removing heavy metal ions in industrial wastewater, such as ion exchange membrane method, chemical reduction method, chemical precipitation method and adsorption method, among which adsorption method is an effective method that is simple and efficient, and ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20C02F101/22
CPCB01J20/10B01J20/20C02F1/281C02F1/283C02F1/288C02F2101/20C02F2101/22
Inventor 吕生华孙世彧
Owner 宁夏亿昀特种工程材料有限公司
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