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Modified attapulgite filter material for heavy metal wastewater treatment and preparation method of modified attapulgite filter material

A modified attapulgite and wastewater treatment technology, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of unsatisfactory effect, limited adsorption capacity, and influence on attapulgite Application and other issues, to achieve the effect of improving treatment effect, easy biodegradability, and enhancing chelation

Inactive Publication Date: 2019-01-18
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] It can be seen that the natural attapulgite in the prior art has a relatively limited adsorption capacity for heavy metals. When it is used for heavy metal wastewater treatment, it needs to be modified to further optimize its adsorption performance to achieve targeted removal of heavy metal ions. The effect of traditional modification technology is not ideal, which affects the application of attapulgite in the field of heavy metal wastewater treatment

Method used

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  • Modified attapulgite filter material for heavy metal wastewater treatment and preparation method of modified attapulgite filter material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] a. Add attapulgite powder into water, stir evenly, add silane coupling agent γ-aminopropyltriethoxysilane to it, and filter after ultrasonic dispersion treatment. The ultrasonic frequency of ultrasonic dispersion is 42kHz, and the time is 28min , vacuum drying, the temperature of vacuum drying is 76 ° C, and the time is 11 hours to obtain modified attapulgite; wherein, 16 parts by weight of attapulgite powder, 83 parts by weight of water, and 1 part by weight of silane coupling agent;

[0031] B, the modified attapulgite prepared in step a is uniformly mixed with tetrasodium iminodisuccinate to prepare the mixture; wherein, the mass ratio of modified attapulgite and tetrasodium iminodisuccinate is 13: 1;

[0032] c. Add the mixture prepared in step b into the silica sol, send it to a granulator for granulation, and pass through a 10-mesh sieve to obtain a modified attapulgite filter material for heavy metal wastewater treatment, wherein the mixture is 48 parts by weight...

Embodiment 2

[0034] a. Add attapulgite powder into water, stir evenly, add silane coupling agent γ-glycidyl etheroxypropyl trimethoxysilane to it, filter after ultrasonic dispersion treatment, the ultrasonic frequency of ultrasonic dispersion is 30kHz, time For 40 minutes, vacuum drying, the temperature of vacuum drying is 70 ° C, and the time is 12 hours, to obtain modified attapulgite; wherein, 10 parts by weight of attapulgite powder, 89 parts by weight of water, and 1 part by weight of silane coupling agent;

[0035] B, the modified attapulgite prepared in step a is uniformly mixed with tetrasodium iminodisuccinate to prepare the mixture; wherein, the mass ratio of modified attapulgite and tetrasodium iminodisuccinate is 10: 1;

[0036] c. Add the mixture prepared in step b into the silica sol, send it to a granulator for granulation, pass through a 20-mesh sieve, and obtain a modified attapulgite filter material for heavy metal wastewater treatment, wherein 40 parts by weight of the m...

Embodiment 3

[0038]a. Add attapulgite powder into water, stir evenly, add silane coupling agent γ-methacryloxypropyltrimethoxysilane to it, and filter after ultrasonic dispersion treatment. The ultrasonic frequency of ultrasonic dispersion is 50kHz , the time is 20min, vacuum drying, the temperature of vacuum drying is 80 ℃, and the time is 8h, and the modified attapulgite is obtained; wherein, 20 parts by weight of attapulgite powder, 78 parts by weight of water, and 2 parts by weight of silane coupling agent ;

[0039] B, the modified attapulgite obtained in step a is uniformly mixed with tetrasodium iminodisuccinate to prepare a mixture; wherein, the mass ratio of modified attapulgite and tetrasodium iminodisuccinate is 15: 1;

[0040] c, adding the mixture prepared in step b to silica sol, sending it into a granulator for granulation, and passing through a 10-mesh sieve to obtain a modified attapulgite filter material for heavy metal wastewater treatment, wherein 60 parts by weight of...

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Abstract

The invention discloses a modified attapulgite filter material for heavy metal wastewater treatment and a preparation method of the modified attapulgite filter material. The modified attapulgite filter material is prepared by the following steps of a, adding attapulgite powder and a silane coupling agent in water for ultrasonic dispersion treatment to prepare modified attapulgite; b, mixing the modified attapulgite with tetrasodium iminodisuccinate to obtain a mixture; and c, adding silica sol in the mixture, and performing pelleting to prepare the modified attapulgite filter material for heavy metal wastewater treatment. The method has the beneficial effects that by utilizing etrasodium iminodisuccinate to modify the attapulgite filter material, the prepared filter material is large in specific surface area and strong in adsorption ability, strengthens the chelation to heavy metal ions, greatly increases the adsorption quantity to the heavy metal ions, can be recycled for many times and cannot generate secondary pollution to environment.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a heavy metal wastewater treatment filter material, in particular to a modified attapulgite filter material for heavy metal wastewater treatment and a preparation method thereof. Background technique [0002] Heavy metal pollution mainly refers to the environmental pollution of heavy metals with significant biological toxicity such as mercury, lead, cadmium, chromium and arsenic, and also includes heavy metals with certain toxicity such as zinc, copper, cobalt, nickel, tin, vanadium, etc. When they accumulate in the water body to a certain limit, they will cause serious harm to the water body, aquatic plants and animal systems, and may affect human life and health through the food chain. Heavy metal wastewater mainly comes from wastewater discharged from mining, smelting, electronics, electroplating, chemical, machinery manufacturing and other industries. These wastewater may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/22C02F1/288C02F2101/20
Inventor 陈庆何方
Owner CHENDU NEW KELI CHEM SCI CO LTD
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