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Method for removing heavy metal ions in drinking water

A technology for heavy metal ions and drinking water, applied in chemical instruments and methods, ion exchange water/sewage treatment, water pollutants, etc., can solve the secondary pollution of drinking water and other problems, and achieve stable performance, good economic benefits and environmental protection benefits , the effect of high mechanical strength

Active Publication Date: 2021-02-26
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the monomers of macroporous adsorption resins are often styrene and divinylbenzene, which are low-toxic substances and are likely to cause secondary pollution to drinking water, such as:

Method used

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  • Method for removing heavy metal ions in drinking water
  • Method for removing heavy metal ions in drinking water
  • Method for removing heavy metal ions in drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 0.5g of SiO to 100mL drinking water (0.2ppm cadmium ion concentration) 2 @Rosin-based macroporous adsorption resin, pH=6.0, shake at 30°C for 70 minutes. The removal rate of cadmium ions can reach 96.94%.

Embodiment 2

[0045] Add 0.6g of SiO to 100mL drinking water (0.2ppm cadmium ion concentration) 2 @Rosin-based macroporous adsorption resin, pH=6.0, shake at 30°C for 70 minutes. The removal rate of cadmium ions can reach 98.66%.

Embodiment 3

[0047] Add 0.8g of SiO to 100mL drinking water (0.2ppm cadmium ion concentration) 2 @Rosin-based macroporous adsorption resin, pH=6.0, shake at 30°C for 70 minutes. The removal rate of cadmium ions can reach 98.66%.

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Abstract

The invention discloses a method for removing heavy metal ions in drinking water, and belongs to the technical field of drinking water purification. According to the method for removing the heavy metal ions in the drinking water, SiO2-coating rosin-based macroporous adsorption resin is added into the drinking water, and according to the adsorption characteristic of the SiO2-coating rosin-based macroporous adsorption resin and different initial concentrations of the heavy metal cadmium and lead ions in the drinking water, a static adsorption method is used, and the addition amount, temperature,pH value, adsorption time and other parameters of the SiO2-coating rosin-based macroporous adsorption resin are reasonably controlled, so that the heavy metal cadmium and lead ions in the drinking water can be efficiently removed, and the concentration of the cadmium and lead ions in the drinking water treated by the method can reach the first-grade standard (CJ 3020-1993) of a domestic drinkingwater source. The removal process of the method is green and environment-friendly, especially has the characteristic of no toxicity, has very good economic benefits and environmental protection benefits, and is very suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of drinking water purification, in particular to a method for removing heavy metal ions in drinking water. Background technique [0002] Heavy metals are potentially harmful persistent pollutants. Because heavy metal ions are difficult to degrade, they will accumulate in fish and crop tissues, and through the food chain, they will eventually endanger human health. Excessive cadmium and lead ions in drinking water will directly endanger human health, so it is necessary to remove cadmium and lead ions in drinking water. [0003] The methods of removing heavy metals in drinking water are commonly used ion exchange method, precipitation method and adsorption separation method. Precipitation method is often used to treat drinking water with high concentration of heavy metals, and the removal effect of trace heavy metals in water is not good. Patent 00131216.2 (method for removing arsenic, lead, chromium, cadmium and merc...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/42C02F101/20
CPCC02F1/288C02F1/42C02F2001/425C02F2101/20C02F2303/16
Inventor 夏璐杨建林雷福厚李伟源胡迎丽
Owner GUANGXI UNIV FOR NATITIES
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