Modification method of illite adsorbent for removing heavy metal ions in wastewater

A heavy metal ion, illite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants and other directions, can solve the problems of uneven removal of heavy metals, large investment and other problems, to achieve good removal effect and investment consumption. The effect of small energy and wide application prospects

Inactive Publication Date: 2015-04-22
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some other technologies, but the removal effects of heavy metals in wastewater are uneven, and the investment is also large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Mix 200-mesh illite raw ore with zinc sulfate at a ratio of 1:1, mix evenly and place it in a muffle furnace, set the baking temperature to 600°C, take it out after roasting for two hours, and fully grind it. The mixed powder is obtained, and then the mixed powder is washed with dilute hydrochloric acid with a pH of 5.3 until it is detected that there is no sulfate ion in the aqueous solution, and finally the finished product is obtained by centrifugal drying.

[0014] In the process of applying to the actual wastewater treatment, 50mL and 300mg / L containing Pb 2+ In the wastewater, 1.55g of activated illite after modification was added, and after the reaction, Pb 2+ The concentration drops to 0mg / L, which meets the national heavy metal pollutant discharge standard and can be discharged up to the standard.

Embodiment 2

[0015] Example 2: Mix 500-mesh illite raw ore with zinc sulfate at a ratio of 1:1, mix evenly and place it in a muffle furnace, set the baking temperature to 600°C, take it out after roasting for two hours, and fully grind it. The mixed powder is obtained, and then the mixed powder is washed with dilute hydrochloric acid with a pH of 5.3 until it is detected that there is no sulfate ion in the aqueous solution, and finally the finished product is obtained by centrifugal drying.

[0016] In the process of applying to the actual wastewater treatment, 50mL and 300mg / L containing Pb 2+ In the wastewater, the modified activated illite 1.55 was added, and after the reaction, the Pb 2+ The concentration drops to 0mg / L, which meets the national heavy metal pollutant discharge standard and can be discharged up to the standard.

Embodiment 3

[0017] Example 3: Mix 1000-mesh illite raw ore with zinc sulfate at a ratio of 1:1, mix evenly and place it in a muffle furnace, set the roasting temperature to 600°C, take it out after roasting for two hours, and fully grind it. The mixed powder is obtained, and then the mixed powder is washed with dilute hydrochloric acid with a pH of 5.3 until it is detected that there is no sulfate ion in the aqueous solution, and finally the finished product is obtained by centrifugal drying.

[0018] In the process of applying to the actual wastewater treatment, 50mL and 300mg / L containing Pb 2+ In the waste water, add 1.5g of activated illite after modification, after reaction, Pb 2+ The concentration drops to 0mg / L, which meets the national heavy metal pollutant discharge standard and can be discharged up to the standard.

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Abstract

The invention relates to a modification method of an illite adsorbent for removing heavy metal ions in wastewater. The method comprises the following steps: crushing illite raw ore, mixing the crushed illite raw ore with zinc sulfate according to a ratio of 1:1, uniformly mixing, placing the obtained mixture in a muffle furnace, setting the roasting temperature at 600DEG C, roasting for 2h, taking out the roasted mixture, fully milling to obtain mixed powder, washing the mixed powder by using diluted hydrochloric acid with the pH value of 5.3 until a detect result shows that the aqueous solution of the mixed powder has no sulfate ions, centrifuging, and drying to prepare a finished product. The illite adsorbent obtained in the invention is mainly used for removing heavy metal ions in wastewater, and has the advantages of wide application prospect, good removal effect, small investment and energy consumption, economy and practicality.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to the popularization and application of clay mineral illite in removing heavy metal ions in waste water, and in particular to an illite adsorbent modification method for removing heavy metal ions in waste water. Background technique [0002] Heavy metal ions are mainly Cr6+, U6+, Te3+, Co3+, Se6+, Pu3+, Hg2+, Mn4+, etc. Heavy metals, especially mercury, cadmium, lead, chromium, etc. have significant and biological toxicity. They cannot be degraded by microorganisms in water bodies, but can only undergo the process of mutual transformation, dispersion and enrichment of various forms. Heavy metals refer to metals with a specific gravity greater than 5, and generally refer to metals with a density greater than 4.5 grams per cubic centimeter. There are about 45 kinds, such as copper, lead, zinc, iron, cobalt, nickel, manganese, cadmium, mercury, tungsten, molybdenum, gold, sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/62
CPCB01J20/0244B01J20/0281B01J20/12B01J2220/42B01J2220/4806C02F1/281C02F2101/20
Inventor 王现丽郭一飞吴俊峰刘盼殷世强扶咏梅宋丰明
Owner HENAN UNIV OF URBAN CONSTR
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