Method absorbing lead ions in sewage with tremolite amianthine

A tremolite, the technology of tremolite, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the advantages of convenient operation, simple preparation process and high adsorption rate Effect

Inactive Publication Date: 2010-10-20
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to use the advantages of abundant tremolite cashmere reserves and low price to conduct adsorption research on lead ions in sewage, find a feasible process method, reduce the cost of lead pollution, realize popularization and application, and improve survival. surroundings

Method used

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  • Method absorbing lead ions in sewage with tremolite amianthine
  • Method absorbing lead ions in sewage with tremolite amianthine
  • Method absorbing lead ions in sewage with tremolite amianthine

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preparation example Construction

[0028] Sorbent preparation

[0029] Take a certain amount of different tremolite wool, natural zeolite, sepiolite wool, bentonite, kaolin and other adsorbents, and roast them in a DHG-9070A electric blast drying oven at a temperature of 100-110°C for 3-4 hours; After grinding, sieve under 80-100 mesh standard sieve to obtain different adsorbent powders.

[0030] Preparation of tremolite wool adsorbent

[0031] Prepare 100ml of 0.05-0.10mol / L ferric chloride solution, mix 2-3g of tremolite velvet with 100ml ferric chloride solution of various concentrations, and shake with an oscillator at 300 times / min for 20-24 hours at room temperature Suction. Wash the filter cake with distilled water for 2-3 times, put the filter cake in a blast drying oven at 140-150°C for 1-2 hours, crush and grind the filter cake, and sieve it under 80-100 mesh to obtain tremolite Lint absorbent.

Embodiment 1

[0032] Embodiment 1: Screening of different adsorbents

[0033] Take 0.2g of different tremolite wool, natural zeolite, sepiolite wool, bentonite, kaolin and other adsorbents, mix them with 100ml of 50mg / L lead nitrate solution (simulating the concentration of lead ions in wastewater), and mix them at 20°C Shake in a constant temperature oscillator in a water bath at low temperature for 1 hour. After the solution is centrifuged, take the supernatant and put it into a small test tube, and analyze and detect it with a Shimadzu AA-6200 atomic spectrophotometer.

[0034] Table 2 Screening of the best adsorbent

[0035] Adsorbent Removal rate (%) Adsorption capacity (mg / g)

[0036] Natural zeolite 96.62 24.13

[0037] Meerschaum 95.17 23.77

[0038] Bentonite 96.44 24.09

[0039] Kaolin 96.07 24.00

[0040] Tremolite 99.77 25.00

[0041] Experimental results: tremolite wool adsorbent is used to adsorb heavy metal Pb in water, the treated water can meet the discharge standard,...

Embodiment 2

[0042] Embodiment 2: Determination of the optimal amount of adsorbent

[0043] Take 0.1g, 0.2g, 0.5g, 1.0, 1.5g, 2.0g of tremolite wool adsorbent, mix it with 100ml of lead nitrate solution (simulating the concentration of lead ions in wastewater) with a concentration of 50mg / L, and mix it at 20°C Shake in a constant temperature oscillator in a water bath for 1 hour. After the reaction, the solution is centrifuged, and the supernatant is put into a small test tube, and analyzed and detected by a Shimadzu AA-6200 atomic spectrophotometer.

[0044] Table 3 Screening of optimal adsorbent dosage

[0045] Adsorbent dosage (g) Removal rate (%)

[0046] 0.1 99.32

[0047] 0.2 99.77

[0048] 0.5 100.00

[0049] 1.0 100.00

[0050] 1.5 100.00

[0051] 2.0 100.00

[0052] Experimental results: tremolite wool adsorbent is used to adsorb and treat heavy metal Pb in low-concentration wastewater, and the optimal dosage for 100ml treatment volume is 0.2g-0.5g.

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Abstract

The invention relates to a method absorbing lead ions in sewage with tremolite amianthine. The tremolite amianthine mineral containing calcium magnesium alkaline earth metal silicate is calcinated, smashed and sieved and then reacts with ferric chloride to generate tremolite amianthine sorbent which is used to remove the lead ions in the sewage with 50-150mg / L lead compound. The tremolite amianthine sorbent is oscillated for 30 to 60'in water bath with the ph value of 6 to 8 and the constant temperature of 20 to 25 degrees centigrade and the removing rate of the lead ions in the sewage is 99.7 to 100 percent. When the lead compound concentration of the sewage is 50 to 200 mg / L, the tremolite amianthine sorbent has linear correlation with the sewage. After absorbing the metal sewage, the tremolite amianthine sorbent prepared through the invention can be regenerated and reused. The tremolite amianthine sorbent has the advantages of simple preparation technology, low cost and convenient popularization and application and accords with the requirement of environmental protection, saving energy and low carbon economy.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a method for removing lead ions in industrial sewage by using a tremolite material. Background technique [0002] With the rapid development of my country's industry, serious environmental pollution has deteriorated the water quality of many rivers, lakes and groundwater. Industries such as electroplating, turf making, and chemical industry discharge a large amount of wastewater containing heavy metal ions every year, containing heavy metal pairs such as Pb, Cd, and Hg. The biological environment and human survival are the most harmful, especially the rapid development of my country's electric vehicle industry. The scrapped lead-acid batteries have aggravated the lead pollution of ground water, causing lead ions to seriously pollute my country's ecological environment and lead to human lead poisoning. A variety of enzymes in the body are combined to interfere with the normal biochemical and phys...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/32C02F1/28C02F101/20
Inventor 彭革朱瑞芬李涛
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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