Method for adsorbing and removing fluorine from negative hard fluorine-containing mine water

• Main Authors: LU MENGNAN, WANG YANZHONG, LIANG CHAO, SU SHUANGQING, CHEN XUE, ZHAO YAN, GUO XUTAO, LI ZE
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the field of sewage treatment, and discloses a method for adsorbing and defluorinating negative-hardness fluorine-containing mine water, which comprises the following steps: (1) pretreating the negative-hardness fluorine-containing mine water to obtain pretreated negative-hardness fluorine-containing mine water; (2) adsorption: the pretreated negative hard fluorine-containing mine water flows through an adsorbent for adsorption and fluorine removal; (3) regeneration of the adsorbent: circularly flushing the adsorbent after adsorption and defluorination with a regeneration solution, soaking the circularly flushed adsorbent with the circularly flushed regeneration solution to obtain a regenerated adsorbent and a regenerated waste liquid, washing the regenerated adsorbent with the pretreated negative hard fluorine-containing mine water to obtain a washed adsorbent and a washing waste liquid, and recycling the washed adsorbent and the washing waste liquid to obtain the adsorbent. And retu