Method for removing hexavalent chromium in wastewater by sodium humate/biochar magnetic composite material

A magnetic composite material, sodium humate technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., to achieve the effect of wide source of raw materials, low price, and low cost of treatment process

Active Publication Date: 2019-02-22
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no precedent for the application of sodium humate / biochar magnetic composite materials in the treatment of hexavalent chromium wastewater

Method used

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  • Method for removing hexavalent chromium in wastewater by sodium humate/biochar magnetic composite material
  • Method for removing hexavalent chromium in wastewater by sodium humate/biochar magnetic composite material
  • Method for removing hexavalent chromium in wastewater by sodium humate/biochar magnetic composite material

Examples

Experimental program
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Embodiment 1

[0030] A kind of method utilizing sodium humate / biochar magnetic composite material of the present invention to remove hexavalent chromium in waste water comprises the following steps:

[0031] 1. Preparation of Sodium Humate / Biochar Magnetic Composite

[0032] The peeled stems of ramie were dried at room temperature, pulverized by a pulverizer and then ground, passed through a 100-mesh sieve, and a sodium humate solution with a mass concentration range of 5 g / L was prepared, and filtered after ultrasonication for 20 minutes to remove insoluble matter; 50 g of ramie stems After soaking the powder in 1000mL sodium humate solution with a mass concentration range of 5g / L for 1-5h, dry it at 80°C, put it into a tube furnace for pyrolysis, feed nitrogen at a flow rate of 100mL / min, and Raise the temperature to 500°C at a speed of 1 / min, keep pyrolysis for 2 hours after the temperature rises to 500°C, and cool the obtained product to room temperature under the condition of continuin...

Embodiment 2

[0037] A kind of method utilizing sodium humate / biochar magnetic composite material of the present invention to remove hexavalent chromium in waste water comprises the following steps:

[0038] 1. Preparation of Sodium Humate / Biochar Magnetic Composite

[0039] This step is the same as Step 1 of Example 1.

[0040] 2. Treatment of hexavalent chromium wastewater

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Abstract

The invention discloses a method for removing hexavalent chrome in wastewater by using a sodium humate / biochar magnetic composite material. The method comprises the following steps: taking a certain amount of hexavalent chrome wastewater, regulating the pH value to 2.0-10.0 (preferably 2.0-6.0, and most preferably 2.0), and adding a certain amount of the sodium humate / biochar magnetic composite material into the wastewater, wherein the dry weight of the sodium humate / biochar magnetic composite material for every liter of wastewater is 0.5-10g; reacting in a constant-temperature oscillator at the speed of 100-300 rpm for 0-24 hours (most preferably 1-6 hours) while controlling the reaction temperature at 10-50 DEG C (most preferably 30-40 DEG C); and after the reaction finishes, separating the sodium humate / biochar magnetic composite material from the solution, thereby removing the hexavalent chrome from the wastewater. The method has the advantages of low cost, high treatment efficiency and the like, and is convenient to operate. The method can be used for treating hexavalent-chrome-containing wastewater in electroplating factories, smelteries, electronic factories and the like.

Description

technical field [0001] The invention relates to the application of a biochar composite material in the field of wastewater treatment, in particular to the application of a sodium humate / biochar magnetic composite material in the treatment of heavy metal wastewater. Background technique [0002] Heavy metal pollution is a serious environmental pollution problem. In the process of industrialization, a large amount of industrial wastewater is discharged into the natural environment. For example, industrial wastewater discharged from industries such as metal processing, electroplating, and tanning usually contains a large amount of chromium ions. The chromium ions in industrial wastewater are mainly compounds of hexavalent chromium, which often exist as chromate ions, and the toxicity of hexavalent chromium is more than three The valence of chromium is many times higher. Therefore, in order to alleviate the environmental pollution caused by hexavalent chromium, it is necessary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/20B01J20/28B01J20/30C02F101/22
CPCB01J20/20B01J20/28009B01J2220/485C02F1/283C02F2101/22C02F2209/06
Inventor 王慧王玉富郭媛龙松华邱财生郝冬梅钟国乾许雯雯
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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