Preparation method and application of lanthanum modified sycamore biochar

A technology of sycamore and biochar, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as unknown performance of adsorbing P, no research on adsorption capacity, etc., achieving low cost, stable water effluent effect, A wide range of effects
CN111298769AActive Publication Date: 2020-06-19BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2020-06-19

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Abstract

The invention discloses a preparation method of lanthanum hydroxide modified biochar, belongs to the field of functional materials and environmental water treatment, and is used for removing phosphatein municipal sewage. According to the method, sycamore fruit balls are used as a biochar raw material, and after lanthanum modification, the efficient, economical and environment-friendly adsorbent La-TC is prepared. Aiming at the concentration of phosphorus in municipal sewage of 4-10mg / L, when the using amount of La-TC is 0.3-0.5 g / L, the pH value of the solution is 3-9 and the temperature is 25-40 DEG C, 100% removal of phosphate can be realized within 15-20 minutes. Meanwhile, high competitive anion interference resistance is achieved, and the adsorption rate of La-TC can still reach 100%after three times of adsorption and desorption cycles. In an experiment of removing municipal sewage by using a fixed bed column, the maximum bed volume of 0.5-1.0 g of La-TC component treatment is 420BV-480BV at a flow rate of 1mL / min, which indicates that La-TC has a wide prospect in practical engineering application.
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Description

technical field

[0001] The invention discloses a preparation method of lanthanum hydroxide modified biochar, belongs to the field of functional materials and environmental water treatment, and is used for removing phosphate in urban sewage. Background technique

[0002] Phosphate is a limiting nutrient factor for phytoplankton in water bodies, and its unreasonable discharge will inevitably lead to eutrophication of water bodies. Studies have shown that when the concentration of phosphate in the water body reaches 0.02mg / L, it is enough to stimulate the growth of algae and cause serious algae blooms. Therefore, it is very important to protect the water ecological environment to remove the phosphate in the sewage before it is discharged into the receiving water body. At present, there are many technical means to remove phosphate in sewage, such as enhanced biological phosphorus removal EBPR, chemical precipitation, ion exchange, membrane treatment technology and adsorption me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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