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Biomass adsorbent for treatment of heavy metal wastewater and treatment method of heavy metal wastewater

A biomass adsorbent and wastewater treatment technology, which is applied in alkali metal compounds, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve problems such as environmental secondary pollution, organic polymers are difficult to degrade, and non-renewable costs. Achieve the effects of low cost, strong adsorption capacity, and high use value

Inactive Publication Date: 2011-11-23
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, this method may cause secondary pollution to the environment because the organic polymer is difficult to degrade, and this organic compound is non-renewable and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The bio-yield of Jute Capsule is high. Generally, after a certain period of planting, the plant height reaches about 30cm, and the young shoots and leaves are picked, dehydrated and dried. When the crop blooms, all leaves and stems are harvested separately, and the leaves and stems are sun-dried separately. .

[0011] Raw material pretreatment: After the young shoots and leaves are picked, preliminary processing and pretreatment must be carried out in time. Main process: picking - dehydration and drying - primary grinding - storage. The stems were harvested before flowering, and the pretreatment of mature stems: dehydration and drying - stem cutting (5cm long) - crushing - primary grinding - storage.

[0012] Preparation of adsorbent: finely grind the above-mentioned pretreated raw materials to 100-150 mesh powder to obtain stem and leaf powder respectively.

[0013] Since the mucus content in the leaf powder is higher and the adsorption capacity is stronger, differen...

Embodiment 2

[0016] Pretreatment of raw materials: After the young shoots, stems and leaves are picked in stages and in batches, preliminary processing and pretreatment must be carried out in time. Main process: picking - dehydration and drying - primary grinding - storage. The stems are harvested at one time before flowering, and the pretreatment of mature stems: dehydration and drying - stem cutting (5cm long) - crushing - primary grinding - storage.

[0017] Preparation of adsorbent material: Mix the above-mentioned pretreated raw materials 3:1 and finely grind to 100-150 mesh powder.

[0018] Heavy metal wastewater treatment: in 1 liter lead (Pb 2+ ) in water with a concentration of 10 mg / L, add 5 grams of the above-mentioned adsorbents that have been finely ground to 100-150 mesh, shake for 30 minutes, and centrifuge to detect the cadmium concentration in the clear liquid, and the lead removal rate reaches 99.5%.

Embodiment 3

[0020] This is an experiment of treating heavy metal copper wastewater with the adsorbent obtained by the preparation method of Example 2.

[0021] Heavy metal wastewater treatment: in 1 liter of copper (Cu 2+ ) concentration is that 5 grams of adsorbent obtained in Example 2 are added in the water of 10 mg / L, shaken for 30 minutes, and centrifuged to detect the clear liquid cadmium concentration, and the copper removal rate reaches 98%.

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PUM

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Abstract

The invention discloses a biomass adsorbent for the treatment of heavy metal wastewater and a treatment method of the heavy metal wastewater. The biomass adsorbent is prepared through the following steps of: dehydrating and drying corchorus olitorius; and then grinding into powder. The treatment method of the heavy metal wastewater comprises the following steps of: pouring the biomass adsorbent into the heavy metal wastewater; and then oscillating the heavy metal wastewater. The biomass adsorbent disclosed by the invention has very high adsorption capacity on heavy metals contained in the wastewater; by treating the heavy metal wastewater by using the method, various heavy metals can be effectively removed, wherein the removal rate on cadmium, copper, lead, chromium, zinc, manganese, mercury, and the like can reach 95.0-99.9 percent, and the removal rate on nickel is more than 80 percent; and in addition, the heavy metals absorbed by the biomass adsorbent disclosed by the invention can be recovered through methods, such as an incineration smelting method or a chemical reduction method and the like, and therefore higher utilization value is created.

Description

technical field [0001] The invention relates to an adsorbent for heavy metal wastewater treatment and a heavy metal wastewater treatment method. Background technique [0002] At present, there are three main types of heavy metal wastewater treatment methods in the world: the first category is the method of removing heavy metal ions in wastewater through chemical reactions, including neutralization precipitation, sulfide precipitation, ferrite co-precipitation, chemical reduction, Electrochemical reduction method and polymer heavy metal collector method, etc. The second category is the method of adsorbing, concentrating and separating heavy metals in wastewater without changing their chemical forms, including adsorption, solvent extraction, evaporation and coagulation, ion exchange and membrane separation. The third category is the method of removing heavy metals in wastewater by means of flocculation, absorption, accumulation and enrichment of microorganisms or plants, incl...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62C02F1/56
Inventor 龚友才陈基权粟建光戴志刚
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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