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Layered magnesium-manganese composite material for copper ion adsorption, and preparation method and application thereof
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A composite material, copper ion technology, applied in chemical instruments and methods, catalyst activation/preparation, adsorbed water/sewage treatment, etc., can solve the problem of small copper adsorption, achieve fast fixation, low price, and broad application prospects Effect
Active Publication Date: 2020-07-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Adsorption method is currently widely used and effective method to remove copper pollution in water body, but the general adsorbent has a small amount of copper adsorption.
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Embodiment 1
[0040] A preparation method of a layered magnesium-manganese composite material for treating copper pollution in wastewater according to this embodiment, the specific preparation steps are as follows:
[0041] (1) Accurately weigh 0.06mol magnesium chloride hexahydrate and 0.03mol manganese chloride tetrahydrate (Mg / Mn ratio is 2) and use 1000mL deionized water to dissolve to obtain magnesium salt and manganese salt composite solution;
[0042] (2) 0.005mol sodium carbonate and 0.01mol sodium hydroxide are dissolved in 1000mL deionized water to obtain carbonate and hydroxide composite solution;
[0043] (3) Slowly drop the composite solution of magnesium salt and manganese salt into the composite solution of step (2) at a rate of 2 mL / min, stir for 2 hours, and stir evenly;
[0044] (4) Aging for 24h, then removing the supernatant after centrifuging at 4000r / min for 5min, washing the precipitate several times with deionized water, freeze-drying for 24h, and grinding through a ...
Embodiment 2
[0051] A kind of application of layered magnesium-manganese composite material in catalytic degradation of sulfamethoxazole comprises the following steps:
[0052] (1) Accurately weigh 0.06mol magnesium chloride hexahydrate and 0.03mol manganese chloride tetrahydrate (Mg / Mn ratio is 2) and use 1000mL deionized water to dissolve to obtain magnesium salt and manganese salt composite solution;
[0053] (2) 0.005mol sodium carbonate and 0.01mol sodium hydroxide are dissolved in 1000mL deionized water to obtain carbonate and hydroxide composite solution;
[0054] (3) Slowly drop the composite solution of magnesium salt and manganese salt into the composite solution of step (2) at a rate of 2 mL / min, stir for 2 hours, and stir evenly;
[0055] (4) Aging for 24h, then removing the supernatant after centrifuging at 4000r / min for 5min, washing the precipitate several times with deionized water, freeze-drying for 24h, and grinding through a 200-mesh sieve to obtain a layered magnesium-m...
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Abstract
The invention discloses a layered magnesium-manganese composite material for copper ion adsorption, and a preparation method and an application thereof. The preparation method comprises the followingsteps: (1) dissolving a soluble magnesium salt and a manganese salt in water to obtain a magnesium salt and manganese salt composite liquid; (2) dissolving soluble carbonate and hydroxide in water toobtain a carbonate and hydroxide composite liquid; and (3) dropwise adding the magnesium salt and manganese salt composite liquid into the composite liquid obtained in step (2), stirring and aging, and centrifuging, washing, drying, grinding and sieving the obtained precipitate to obtain the layered magnesium-manganese composite material for copper ion adsorption. The composite material provided by the invention has excellent Cu<2+> fixing capacity, and has the characteristics of high adsorption efficiency, high adsorption speed and stability. Cu<2+> can be efficiently fixed, and important environmental significance is achieved for treating antibiotics in the environment and achieving heavy metal-organic matter combined pollution in-situ remediation.
Description
technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a layered magnesium-manganese composite material used for adsorption of copper ions and its preparation method and application. Background technique [0002] Water body copper pollution will affect the aquatic ecosystem, and enter the human food chain to cause harm to the human body. my country has included copper and its compounds in the "blacklist" of priority water pollutants. Adsorption is a widely used and effective method for removing copper pollution in water bodies, but generally the adsorbent has a small amount of copper adsorption. Layered doublehydroxides (LDHs) have a large number of active sites such as hydroxyl groups on the surface, which makes them have excellent adsorption capacity for copper, and LDH interlayer anions such as carbonate can also efficiently immobilize and remove copper. LDH also has the characteristics of simple prepara...
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