A groundwater defluoridation device based on magnetic hydroxyapatite

Abstract

The invention provides an underground water fluoride removing device based on magnetic hydroxyapatite. The device comprises a water feeding unit (1), a magnetic hydroxyapatite fluoride removing unit (2), a filtering separation unit (3), a water draining unit (4) and a clean water basin (5), all of which are orderly connected together, wherein the water feeding unit (1) is connected with the lower part of the magnetic hydroxyapatite fluoride removing unit (2); the filtering separation unit (3) comprises a primary separation unit (31), an iron powder filter material layer (32) and a pebble layer (33), all of which are orderly connected together; the primary separation unit (31) is connected with the magnetic hydroxyapatite fluoride removing unit (2); and the pebble layer (33) is connected with the water draining unit (4). The underground water fluoride removing device based on the magnetic hydroxyapatite is compact in structure, small in floor area, convenient to use, flexible in running, wide in application range, and capable of well guaranteeing the removal effect of the fluorides in underground water and the overall effluent quality, and has bright popularization and application prospects.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a groundwater defluorination device based on magnetic hydroxyapatite. Background technique [0002] The problem of fluorine pollution in groundwater in China is serious. The distribution area of ​​high-fluorine water exceeds 1.6 million square kilometers, involving nearly 100 million people who use water. Fluorosis caused by excessive intake of fluoride through drinking water is a serious problem worldwide. [0003] Existing groundwater defluoridation technologies mainly include coagulation sedimentation, activated alumina adsorption, electrodialysis, reverse osmosis, ion exchange, adsorption, bone charcoal adsorption, and zeolite defluorination, etc. All there are certain problems in this kind of technology, so that there are certain difficulties in its popularization and application. [0004] Hydroxyapatite is a new material with good effect for defluoridation of groundwater re...

AI Technical Summary

Problems solved by technology

However, there is also the high cost of ultrafiltration membranes, resulting in high device cost and operating costs, which have certain restrictions on the application in rural areas

Recently, fluoride removal methods and devices using hydroxyapatite as the basic treatment material have appeared one after another, which can achieve better fluoride removal effects, but there are still certain problems in practical applications.

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