Manganese-loaded oxide film expanded bed filter tank and method for adsorbing and removing thallium by using same
An oxide film and expanded bed technology, which is applied in the field of water treatment, can solve the problems of polyaluminum chloride that cannot be reused and high water treatment costs, and achieve the effects of high thallium removal efficiency, easy maintenance and management, and simple flushing methods
Pending Publication Date: 2022-02-15
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
However, this technology needs to adjust the pH, and the added polyaluminum chloride cannot be reused, and the cost of water treatment is high
Method used
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[0037] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the specific embodiments do not limit the protection scope of the present invention.
[0038] like figure 1 and figure 2 As shown, a manganese-loaded oxide film expanded bed filter includes a filter body 1, and a water distribution tank 2 contained in the filter body from top to bottom, an upper transition zone 3, a filter plate 4, and a manganese-loaded oxidation film. Membrane expansion filter bed 5, lower transition area 6 and bottom water collection device 8; in addition, it also includes bottom gas distribution device 7, water inlet pipe 9, water outlet pipe 10, air flushing pipe 11 and flushing waste water drainage pipe 12, and various pipes are provided There are valves to independently control the opening and closing; the air flushing pipe 11 is connected to the bottom air distribution...
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Abstract
The invention discloses a manganese oxide film loaded expanded bed filter tank and a method for adsorbing and removing thallium in water by using the same. The manganese-loaded oxidation film expanded bed filter tank comprises a filter tank body, and a water collecting tank, an upper transition area, a filter screen plate, a manganese-loaded oxidation film expanded filter bed, a lower transition area and a water collecting device which are sequentially arranged in the filter tank body from top to bottom. The expanded filter bed loaded with the manganese oxide film is formed by uniformly laying floating ceramsite which is loaded with a MnO2 oxide film on the surface and is wetted by water and has the particle density of 0.95 + / -0.5 g / cm <3>; and a KMnO4 solution feeding hole is formed in the water inlet pipe. According to the method, a large amount of nascent MnO2 is rapidly generated through MnO4- reduction and Mn2+ oxidation and is adsorbed on the surface of the ceramsite, a manganese oxide film is slowly thickened along with continuous addition of potassium permanganate, adsorption and thallium removal are not saturated, and regeneration is not needed. By applying the method, the thallium-containing concentration of the effluent can be controlled to stably reach the domestic drinking water standard of less than 0.1 [mu]g / L.
Description
technical field [0001] The invention relates to the field of water treatment, in particular to an expanded bed filter loaded with manganese oxide film and a method for adsorbing and removing thallium using the same. Background technique [0002] Thallium is a rare element that is often associated with mineral deposits such as pyrite and galena. Monovalent thallium has strong migration activity, and trivalent thallium is thousands of times more toxic than monovalent thallium. The content of thallium in natural water bodies is generally low, 0.001-0.4 μg / L in lakes, 0.01-1.35 μg / L in rivers, and 0.001-0.85 μg / L in groundwater. my country's thallium-bearing ore deposits are rich in resources and widely distributed, and thallium-polluted water sources also appear. Pollution incidents caused by thallium-containing wastewater in mining areas occur from time to time. [0003] At present, my country requires the standard of thallium in drinking water to be ≤0.1μg / L. In some areas...
Claims
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IPC IPC(8): C02F9/04C02F1/72C02F1/28B01J23/34C02F101/20
CPCC02F9/00C02F1/725C02F1/281B01J23/34C02F2101/20C02F1/001C02F2209/11C02F2303/16C02F2303/14C02F2209/02C02F1/5281C02F2001/007
Inventor 陆少鸣杨立
Owner SOUTH CHINA UNIV OF TECH