Silicate-carbonate composite mineral material, preparation method thereof and application of silicate-carbonate composite mineral material in precipitation of heavy metal ions

A technology of heavy metal ions and carbonate minerals, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve problems such as long settling time, failure to achieve effective fixation, and increased process costs , to achieve the effects of easy industrial production, remarkable precipitation effect, and simple preparation method

Pending Publication Date: 2022-03-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain limitations in this method when dealing with heavy metals. The main problems are as follows: (1) When the amount of alkali is insufficient, the removal effect of heavy metals cannot be guaranteed, but the use of a large amount of alkali causes the water body after treatment to be too alkaline (pH>9), Further acid neutralization treatment is required to meet the discharge requirements, and the process cost increases; (2) The sludge with metal hydroxide as the main component has high water content, large volume, long settling time, and difficult solid-liquid separation. This kind of sludge belongs to hazardous solid waste. During the storage process, the redissolution of some

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  • Silicate-carbonate composite mineral material, preparation method thereof and application of silicate-carbonate composite mineral material in precipitation of heavy metal ions
  • Silicate-carbonate composite mineral material, preparation method thereof and application of silicate-carbonate composite mineral material in precipitation of heavy metal ions
  • Silicate-carbonate composite mineral material, preparation method thereof and application of silicate-carbonate composite mineral material in precipitation of heavy metal ions

Examples

Experimental program
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Effect test

Example Embodiment

[0033] Example 1

[0034] A type of silicate-carbonate composite mineral material, the preparation method thereof is as follows:

[0035] Tell four groups of snake pattern and calcium carbonate powder (Caco 3 Abbrevite, CC, analyzing pure): 1.6933 + 0.3067G (mass ratio sp: cc = 5.2: 1), 1.4681 + 0.5319g (mass ratio SP: CC = 2.6: 1), 1.2958 + 0.7042G (mass ratio SP: CC = 1.7: 1), 1.1597 + 0.8403G (mass ratio SP: CC = 1.3: 1), adding 45 ml of zirconium oxide grinding, 1 addition of 70g diameter zirconia ball, spherical ratio For 35: 1, the mill speed is set to 600 rpm, and each group of powder samples is collected after grinding 60 min, resulting in 4 serpentine - calcium carbonate composite fixative, labeled 600-5.2SP-1CC, 600-2.6sp, respectively, respectively. -1CC, 600-1.7SP-1CC, 600-1.3SP-1CC.

[0036] In the control group: 2 g of the serpentine and calcium carbonate were placed in 45 ml of zirconium oxide grinding. After grinding 60 min, the powder sample is collected, resultin...

Example Embodiment

[0045] Example 2

[0046] A silicate-carbonate composite mineral material, the preparation method thereof is as follows:

[0047] Weigh 1.5G olivine powder with 0.5 g of calcium carbonate powder (mass ratio MSI: CC = 2.6: 1), add 70 g of diameter of 15 mm zirconia ball in 45 ml of zirconium oxide, and the ball ratio is 35 : 1, the mill speed is set to 600 rpm, and the powder sample is collected after grinding 60 min to obtain an olivotic-calcium carbonate composite fixative, labeled 600-2.6 msi-1 cc.

[0048] MORE: 2G of olivotic and calcium carbonate is weighed in 45 ml of zirconium oxide grinding tanks, and a zirconia ball of 70g diameter of 15 mm is added in the ball mill, and the ball ratio is 35: 1, grinding. When the machine speed is set to 600 rpm, the powder sample is collected, resulting in polishing activated olivotic and activated calcium carbonate, and the MSI and calcium carbonate mass ratio of 2.6: 1 in olivine is 2.5g, 0.5g, simple Mix the olivine and calcium carbon...

Example Embodiment

[0054] Example 3

[0055] A silicate-carbonate composite mineral material, the preparation method thereof is as follows:

[0056] Weigh 1.5G serpentine powder and 0.5 g of Dolomite powder (mass ratio SP: MCC = 3: 1), add 45 ml of zirconium oxide grinding, and add 70g diameter of 15 mm zirconia ball, ball The ratio is 35: 1, the mill speed is set to 600 rpm, and the powder sample is collected after grinding 60 min to obtain serpentine - Dolomite composite fixative, labeled 600-3 mcc.

[0057] Cadmium sulfate (CDSO) 4 · 8 / 3h 2 O) Pharmaceutical formulation into CD 2+ A solution having a concentration of 100 mg / L, take 100ml in a beaker, according to CO 3 2- CD 2+ The molar ratio 1: 1 is standard, and 0.0346 g of the obtained fixing agent obtained in this example is 0.0346 gadium-containing solution, and the stirring speed is 400 rpm, the reaction time is 2 h, and the reaction is allowed to stand for 10 min, and the solution is tested. The concentration of Cd elements and pH wer...

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Abstract

The invention relates to a silicate-carbonate composite mineral material, a preparation method thereof and application of the silicate-carbonate composite mineral material in precipitation of heavy metal ions. The silicate-carbonate composite mineral material is obtained by mixing, ball-milling and activating silicate mineral powder and carbonate mineral powder. The silicate-carbonate composite mineral material can efficiently fix heavy metal ions such as cadmium and manganese in a wide pH value range, the solid-liquid separation effect can be achieved through short-time standing precipitation, the precipitation effect is remarkable, the use amount is small, operation is convenient, other impurity ions are not introduced, and the silicate-carbonate composite mineral material is environmentally friendly and suitable for industrial production. The pH value of the treated solution is in a weakly alkaline range, acid neutralization treatment is not needed, and the soil remediation agent is suitable for water treatment and heavy metal contaminated soil remediation and can slowly release silicon, magnesium, calcium and other trace/macroelements needed by plant growth in the heavy metal ion fixing process when being used for soil remediation, and the effect of a fertilizer is achieved.

Description

technical field [0001] The invention belongs to the technical field of solution treatment or purification, and in particular relates to a silicate-carbonate composite mineral material, its preparation method and its application in the aspect of precipitating heavy metal ions. Background technique [0002] A large amount of wastewater containing heavy metals is produced in the process of industrial production, and its discharge will lead to the continuous accumulation of heavy metals in the water body and surrounding soil, causing pollution to the ecological environment, and ultimately threatening human health through the transmission of food chains. Therefore, the removal of heavy metals is of great significance for the protection of water bodies and soil ecological environment. [0003] There are many processes for removing heavy metals. Alkali precipitation method is a method widely used in industry at present. It mainly adjusts the alkalinity of water body by adding lime,...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F101/20
CPCC02F1/5236C02F1/5263C02F2101/20C02F2101/206
Inventor 张其武陈敏胡慧敏
Owner WUHAN UNIV OF TECH
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