Manganese-loaded activated aluminum oxide defluorination adsorbent and preparation method thereof

Abstract

The invention belongs to the field of water quality treatment, and particularly relates to a manganese-loaded activated aluminum oxide defluorination adsorbent and a preparation method thereof. According to the technical scheme of the manganese-loaded activated aluminum oxide defluorination adsorbent, manganese oxide is distributed on the surface of activated aluminum oxide in a protruding thorn-shaped structure. The preparation method comprises the steps of 1) activating the carrier activated aluminum oxide; and 2) loading manganese. According to the manganese-loaded activated aluminum oxidedefluorination adsorbent and the preparation method thereof provided by the invention, the modified manganese-loaded activated aluminum oxide has better porosity, larger specific surface area and moreadsorption sites, and the adsorption capacity to fluorine ions is enhanced, so that the treated water is more suitable for drinking.

Description

technical field [0001] The invention belongs to the field of water quality treatment, and in particular relates to a manganese-loaded activated alumina defluorination adsorbent and a preparation method thereof. Background technique [0002] Excessive fluoride (>1.5mg / L) in groundwater will cause obvious damage to the human body, leading to dental fluorosis, skeletal fluorosis, etc., and even cause disabling skeletal fluorosis and loss of working ability in severe cases. Regional fluorosis caused by long-term drinking of high-fluoride water has become a serious geochemical disease. According to statistics, regional fluorosis exists in more than 50 countries in the world. Among them, about 80 million people in my country drink water with excessive fluoride ions, and the concentration of fluoride ions in drinking water for more than 5 million people has exceeded 5 mg / L, seriously endangering human health. How to effectively remove fluorine in groundwater is an urgent probl...

AI Technical Summary

Problems solved by technology

Among them, the chemical precipitation method has problems such as difficulty in adding precipitant and easy to cause secondary pollution; the cost of using electrochemical method and membrane treatment method is high, and it is not easy to use in rural areas with high fluorine content.

The adsorption method is widely used due to its low operating cost and simple process operation, but the commonly used adsorbent activated alumina has the disadvantages of small saturated adsorption capacity and large amount of adsorbent used, and the defluorination effect is not ideal.

Images