Method for preparing renewable magnesium-containing heavy metal adsorbent, and adsorbent prepared therethrough

An adsorbent and heavy metal technology, which is applied in the field of renewable magnesium-containing heavy metal adsorbent and its preparation, can solve the problems of unrealistic industrial production, no involvement of adsorbent regeneration, high cost of adsorbent operation and development, etc., to achieve operation and Effects of reduced development cost, high adsorption activity, and high adsorption efficiency

Inactive Publication Date: 2017-12-19
JIANGSU HELPER FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the study did not address how to regenerate the adsorbent
However, the operation and development costs of adsorbents that cannot be regenerated are relatively large, and industrial actual production cannot be realized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] First, boil the activated carbon as it is in a 500ml beaker with water for 2-4 hours, remove the impurities on the surface of the activated carbon and in the pores, cool to room temperature, filter and dry. Take a 250mL open Erlenmeyer flask, add 50mL dry activated carbon, 0.5mol / L MgCl 2 Solution 100mL, after it is absorbed until there are no air bubbles, put it into a shaking table and shake for adsorption, and absorb for 6-24h. Afterwards, filter under the circulating water pump, add the filtered activated carbon into a 250mL beaker, titrate the obtained activated carbon with 1mol / L ammonia water, and a white gel will appear in the beaker wrapped on the activated carbon. pH value until pH = 10, the sample after the precipitation is left standing for 4h. After standing still, filter and separate, wash with deionized water until the filtrate in the filter bottle is clear, and at the same time monitor the pH value of the filtrate, the pH value range can be 8-10, and pu...

Embodiment 2

[0049] Boil the activated carbon as it is in a 500ml beaker with water for 2 to 4 hours to remove impurities on the surface and pores of the activated carbon, cool to room temperature, filter and dry. Take a 250mL open Erlenmeyer flask, add 50mL of dry activated carbon 1mol / L 100mL of MgCl 2 Solution, after it is absorbed without air bubbles, put it into a shaking table and shake it for adsorption, and absorb it for 6-24 hours. Afterwards, filter under the circulating water pump, add the filtered activated carbon into a 250mL beaker, titrate the activated carbon with 1mol / L ammonia water, and a white gel will appear in the beaker wrapped on the activated carbon. At this time, use a pH meter to monitor the system at all times. pH value in the filter bottle until pH = 10, the sample after the precipitation is left standing for 4h, after the completion of the filter separation, washed with deionized water until the filtrate in the filter bottle is clear, and the pH value of the f...

Embodiment 3

[0053] Boil the activated carbon as it is in a 500ml beaker with water for 2 to 4 hours to remove impurities on the surface and pores of the activated carbon, cool to room temperature, filter and dry. Take a 250mL open Erlenmeyer flask, add 50mL of dry activated carbon, 100mL of 2mol / L MgCl 2 Solution, after it is absorbed without air bubbles, put it into a shaking table and shake it for adsorption, and absorb it for 6-24 hours. Afterwards, filter under the circulating water pump, add the filtered activated carbon into a 250mL beaker, titrate the activated carbon with 2mol / L ammonia water, and a white gel will appear in the beaker wrapped on the activated carbon. At this time, use a pH meter to monitor the system at all times. pH value in the filter bottle until pH = 10, the sample after the precipitation is left standing for 4h, after the completion of the filter separation, washed with deionized water until the filtrate in the filter bottle is clear, and the pH value of the ...

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PUM

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Abstract

The invention discloses a method for preparing a renewable magnesium-containing heavy metal adsorbent and an adsorbent prepared therethrough. The method comprises the following steps: preprocessing a catalysis carrier, impregnating the catalysis carrier in s magnesium source solution, standing the impregnated and adsorbed catalysis carrier in ammonia water or a sodium hydroxide solution to precipitate magnesium ions, cleaning the obtained aged magnesium-containing active carbon until the solution is clear, drying the cleaned magnesium-containing active carbon to obtain the high-efficiency magnesium-containing heavy metal adsorbent. An active component Mg(OH)2 and the carrier active carbon are mutually bonded to form the heavy metal adsorbent having specific properties. The magnesium-based material is loaded to the carrier having rich pore structures and a large specific surface area by using the high activity and the high adsorbing capacity, so the disadvantages of high treatment cost and difficult recovery of single adsorbent are overcome, and a proper desorbent (complexing agent) is used to desorb and enrich heavy metals in order to regenerate the supported adsorbent.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a renewable magnesium-containing heavy metal adsorbent and a preparation method thereof. Background technique [0002] In recent years, with the acceleration of the industrialization process, a large amount of industrial wastewater and urban domestic sewage containing heavy metals have been discharged into the environment, causing immeasurable harm to the atmosphere, soil, water and people's daily life. Most heavy metals come from electroplating, metallurgy, petrochemical and other industries, mainly including As, Hg, Pb, Cu, Cr, Ni, Zn, etc. Heavy metal ions are highly toxic, persistent and non-degradable. These heavy metals pass through the food chain in water and eventually threaten human health. [0003] As a weak base, magnesium hydroxide has strong acid-base buffering capacity, good activity and adsorption performance, safety, non-toxicity and good stability in use...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/32B01J20/34C02F1/28C02F101/20
CPCB01J20/041B01J20/20B01J20/28054B01J20/3234B01J20/3475C02F1/281C02F2101/20
Inventor 蔡建国石洪雁梅伟刚
Owner JIANGSU HELPER FUNCTIONAL MATERIALS
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