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Preparation method of undisturbed leersia hexandra heavy-metal bio-adsorbent

A biosorbent, heavy metal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as limitations, and achieve the effect of good adsorption effect

Inactive Publication Date: 2015-06-24
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, effective separation processes for removing heavy metals include precipitation, ion exchange, electrochemical treatment, membrane technology, evaporation and solidification, etc., but the application of these technologies is limited by technology and economy

Method used

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  • Preparation method of undisturbed leersia hexandra heavy-metal bio-adsorbent
  • Preparation method of undisturbed leersia hexandra heavy-metal bio-adsorbent
  • Preparation method of undisturbed leersia hexandra heavy-metal bio-adsorbent

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Experimental program
Comparison scheme
Effect test

Embodiment

[0018] one, Undisturbed Lishihe heavy metal biosorbent Preparation of:

[0019] (1) Rinse the leaves of Lishihe with tap water for 3 times, and then with ultrapure water for 3 times.

[0020] (2) Put 500 g of Lishihe leaves obtained in step (1) into a cowhide file bag, dry them in a blast drying oven at 80°C for 24 hours, then crush them with a high-speed pulverizer, and pass through a 100-mesh sieve after crushing.

[0021] (3) Put the product obtained in step (2) into a 50mL ceramic crucible, place it in a muffle furnace at 100°C for 6 hours, take it out after natural cooling, and obtain the original Lishihe heavy metal biosorbent.

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Abstract

The invention discloses a preparation method of an undisturbed leersia hexandra heavy-metal bio-adsorbent. The preparation method comprises the following steps: (1) washing leaves of leersia hexandra for three times by using tap water, and then washing the leaves for three times by using ultrapure water; (2) putting the leaves of leersia hexandra obtained in the step (1) into a kraft file pocket, putting the kraft file pocket into an air dry oven at the temperature of 80 DEG C, drying for 24 hours, then crushing the leaves by using a high-speed crusher, and sieving the obtained object by using a 100-mesh sieve; and (3) putting the object obtained in the step (2) into a ceramic crucible, putting the ceramic crucible into a muffle furnace at the temperature of 100 DEG C for 6 hours, carrying out natural cooling on the obtained product and then taking out the product, thus obtaining the undisturbed leersia hexandra heavy-metal bio-adsorbent. According to the preparation method, a material for absorbing heavy metals in polluted water is prepared by fully using a field weed leersia hexandra, and the material has a good adsorption effect on Cr (VI) in acidic, neutral and alkaline water environments. Meanwhile, the adsorption material prepared by using the method disclosed by the invention also has a good adsorption effect on heavy metals such as Cr (III), Pb, Zn, Mn, Ni and Cd.

Description

technical field [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to a preparation method of an undisturbed Lishihe heavy metal biosorbent. Background technique [0002] With the rapid development of my country's economy, heavy metal wastewater is produced in many production processes in industries such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. Heavy metal wastewater has the characteristics of strong toxicity, refractory degradation, easy enrichment, carcinogenicity, and mutagenicity. It is the focus and difficulty of wastewater treatment. At present, effective separation processes for removing heavy metals include precipitation, ion exchange, electrochemical treatment, membrane technology, evaporation and solidification, etc., but the application of these technologies is limited by technology and economy. [0003] Biosorption method refers to the method of using the che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62C02F1/64
Inventor 张学洪张杏锋程志刚
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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