Arsenic removal method for rural well in high-arsenic underground water region

A technology for groundwater and wells, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc. It can solve the problems of ineffective removal and high concentration of arsenic, and achieve low operation and management costs, simple process requirements, easy-to-handle effects

Active Publication Date: 2014-04-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0005] In order to solve the problem of high arsenic concentration in rural water wells in the existing high-arsenic groundwater areas and long-term ineffective removal, the pre

Method used

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  • Arsenic removal method for rural well in high-arsenic underground water region
  • Arsenic removal method for rural well in high-arsenic underground water region

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Embodiment Construction

[0028] molar ratio FeCl 3 :KMnO 4 =4:3 weigh FeCl 3 and KMnO 4 Standby, under vigorous stirring, 100mlFeCl 3 Slowly drop the solution into 500ml KMnO 4 solution, while continuously adjusting the pH value of the system to 8-10 and keeping it stable; 3 After adding the solution, place it on an electric furnace and heat it to 90-100°C, and keep heating at this temperature for 1-2 hours. During the heating process, stir with a glass rod to prevent bumping, and leave it to age for 6-12 hours. The reaction product is washed with deionized water until neutral, dried, crushed and sieved, and then calcined at 300-500°C for 6-12 hours to prepare the nano-iron-manganese composite oxide. According to this method, prepare about 600g of nano-iron-manganese composite oxide, and wait for it to cool down for later use.

[0029] Fully mix cement, medium sand and water with the ratio of cement: medium sand: water = 1:2:0.6 to make fresh and wet cement balls with a diameter of 0.5 to 1.5 cm...

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Abstract

The invention provides an arsenic removal method for a rural well in a high-arsenic underground water region. The arsenic removal method comprises the following steps: filling a plurality of filter screen bags with cement balls loaded with nano-scale ion and manganese oxides on the surface taken as a particle filter material, and connecting the filter screen bags in a head-to-tail end so as to form a wave-shaped long strip arsenic removal belt, and arranging the long strip arsenic removal belt in water of the well in a suspended manner so as to remove arsenic in water. The method is designed according to the characteristics of a water supply method for the rural well in the high-arsenic underground water region, and the arsenic removal effect of high-arsenic underground water is good; moreover, raw materials are low in cost and are easily available, the technical requirements are simple, the checking and the maintenance are convenient, the administrative and management costs are low, external electric power or other energy supply facility is not needed, and the method is extremely suitable for being popularized and used in the rural well in the high-arsenic underground water region.

Description

technical field [0001] The invention relates to an arsenic removal method for rural water wells in areas with high arsenic groundwater, and belongs to the technical field of water treatment. Background technique [0002] Arsenic is a recognized carcinogen, and the problem of arsenic pollution in groundwater is very common at present. Arsenic in groundwater is mainly in the form of inorganic arsenic, including trivalent arsenic and pentavalent arsenic. Among them, the toxicity of trivalent arsenic is 60 times that of pentavalent arsenic, and most arsenic removal adsorbents have low removal efficiency for trivalent arsenic. The hazards of high-arsenic groundwater to the human body mainly include skin contact, direct drinking, and eating. Arsenic is cumulative and chronically toxic. Long-term accumulation will directly endanger human health. It can cause dermatitis, skin hyperkeratosis, skin pigmentation, and clinical manifestations mainly in the digestive system and nervous ...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/28C02F1/58
Inventor 孔淑琼周辰昕王焰新马腾谢先军苏春利
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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