Iron modified chitosan defluorinated particle adsorbent and preparation method thereof

A particle adsorbent, chitosan technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of low selectivity, high cost, expensive equipment, etc. The effect of small influence and high fluoride ion removal rate
CN104069830AActive Publication Date: 2014-10-01北京涞澈科技发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京涞澈科技发展有限公司
Publication Date
2014-10-01
Patent Text Reader

Abstract

The invention discloses an iron modified chitosan defluorinated particle adsorbent and a preparation method thereof. The preparation method comprises the following steps: step 10, chitosan is dissolved in an acetum at the indoor temperature and stirred until the chitosan is completely dissolved in the acetum to obtain a chitosan solution; step 20, hexahydrate ferric trichloride is added into the chitosan solution and stirred to be uniform, and the mixed solution is put to be stationary; step 30, the mixed solution is added into ammonia water dropwise, put to be stationary, washed by deionized water to be neutral and dried to obtain the particle adsorbent. According to the invention, the method is adopted, so that not only is the prepared iron modified chitosan defluorinated particle adsorbent high in the removal rate of fluorinion and large in adsorbing capacity, but also the removal rate of fluorinion is less influenced by temperature and pH.
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Description

technical field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an iron-modified chitosan defluoridation granular adsorbent and a preparation method thereof. Background technique

[0002] Fluorine is one of the trace chemical elements widely distributed in the natural environment and closely related to human health. It is an essential component for maintaining the normal development of bones in the human body, and plays an important role in promoting the formation of teeth and bones. However, excessive intake of fluoride is also very harmful to humans, animals and plants. The World Health Organization stipulates that the concentration range of fluoride in drinking water is 1.0mg / L-1.5mg / L. Long-term use of high-fluoride water can cause dental fluorosis and bone disease, and even lead to nerve damage.

[0003] Fluoride pollution in surface water and groundwater is common in Africa, India and Northeast China. Fluoride in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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