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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

Active Publication Date: 2020-06-19
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (2) Study on the adsorption performance of biochar in fixed bed column to treat P in urban sewage: none of the previous studies have studied the adsorption capacity of engineered biochar for P in actual wastewater
Furthermore, the performance of biochar as a filter medium for P adsorption in dynamic real wastewater streams in fixed-bed filter reactors remains unknown.

Method used

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  • Preparation method and application of lanthanum modified sycamore biochar
  • Preparation method and application of lanthanum modified sycamore biochar
  • Preparation method and application of lanthanum modified sycamore biochar

Examples

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example 1

[0029] Mix dioctyl sulfosuccinate sodium salt with distilled water at a volume ratio of 1:5 to obtain a mixed solution. The mass ratio of Platanus chinensis fruit balls to the mixed solution is 1:4. Put the sycamore fruit balls into the mixed solution after being crushed. Stir at low temperature for 24 hours, separate and obtain fruit hairs, wash and dry at 105°C. The dried fruit hairs were soaked in 2.5M KOH solution for 2 hours, ultrasonicated at 40KHz for 30 minutes, and dried again. Fruit hairs were pretreated in a tube furnace at 200 °C for 30 min, and 2 Keep in the air flow for 90min, finally at 10℃·min -1 The heating rate was increased to 600 ° C for 2 h. The obtained biochar TC was ground with a 200-mesh sieve and washed to neutral drying. Add 300mgTC to 50mL of 0.2M La(NO 3 ) 3 ·6H 2 In a Erlenmeyer flask of O, 1M NaOH was added by co-precipitation method to maintain the pH at 11, and magnetically stirred for 24h. After centrifugation at 6000 rpm, a solid preci...

example 2

[0032] Mix dioctyl sulfosuccinate sodium salt with distilled water at a volume ratio of 1:5 to obtain a mixed solution. The mass ratio of Platanus chinensis fruit balls to the mixed solution is 1:4. Put the sycamore fruit balls into the mixed solution after being crushed. Stir at low temperature for 24 hours, separate and obtain fruit hairs, wash and dry at 105°C. The dried fruit hairs were soaked in 2.5M KOH solution for 2 hours, ultrasonicated at 40KHz for 30 minutes, and dried again. Fruit hairs were pretreated in a tube furnace at 200 °C for 30 min, and 2 Keep in the air flow for 90min, finally at 10℃·min-1 The heating rate was increased to 600 ° C for 2 h. The obtained biochar TC was ground with a 200-mesh sieve and washed to neutral drying. Add 300mgTC to 50mL of 0.2M La(NO 3 ) 3 ·6H 2 In a Erlenmeyer flask of O, 1M NaOH was added by co-precipitation method to maintain the pH at 11, and magnetically stirred for 24h. After centrifugation at 6000 rpm, a solid precipi...

example 3

[0035] Mix dioctyl sulfosuccinate sodium salt with distilled water at a volume ratio of 1:5 to obtain a mixed solution. The mass ratio of Platanus chinensis fruit balls to the mixed solution is 1:4. Put the sycamore fruit balls into the mixed solution after being crushed. Stir at low temperature for 24 hours, separate and obtain fruit hairs, wash and dry at 105°C. The dried fruit hairs were soaked in 2.5M KOH solution for 2 hours, ultrasonicated at 40KHz for 30 minutes, and dried again. Fruit hairs were pretreated in a tube furnace at 200 °C for 30 min, and 2 Keep in the air flow for 90min, finally at 10℃·min -1 The heating rate was increased to 600 ° C for 2 h. The obtained biochar TC was ground with a 200-mesh sieve and washed to neutral drying. Add 300mgTC to 50mL of 0.2M La(NO 3 ) 3 ·6H 2 In a Erlenmeyer flask of O, 1M NaOH was added by co-precipitation method to maintain the pH at 11, and magnetically stirred for 24h. After centrifugation at 6000 rpm, a solid preci...

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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.

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

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/06C02F1/283C02F1/281C02F2101/105
Inventor 曾薇贾子悦许欢欢李帅帅彭永臻
Owner BEIJING UNIV OF TECH
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