pH对吉林西部低平原湖泊底泥氟释放影响的实验研究  

Experimental Study on the Impact of pH Value on Fluoride Release from Lacustrine Sediments in the Low Plain in West Jilin Province

作　　者：刘璇[1] 梁秀娟[1] 周宇博[1] 金成基[1] 肖霄[1] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130021

出　　处：《干旱区研究》2011年第3期408-412,共5页Arid Zone Research

基　　金：吉林省科技攻关项目(20080543);教育部高校博士点基金(200801830044);"十一五"国家科技支撑项目(2007BAB28B04-03;2006BAB04A09-02;2006BAJ08B09)

摘　　要：针对吉林西部低平原底泥中氟含量较高的花敖泡、道字泡、大布苏泡进行实验,通过底泥中氟长期释放实验(28 d)和不同pH对底泥氟释放影响的研究,得出高氟湖库底泥氟的释放量为37.31～223.03 mg/kg;碱性环境下底泥氟向水中迁移的速率在1.88～22.53 mg/(kg.d);酸性环境中释放的速率0.71～5.41 mg/(kg.d);含氟矿物的溶解作用、铁铝氧化物的专性吸附作用及含氟黏土矿物与OH-的置换作用是底泥氟在碱性条件下向水体迁移且迁移速率较大的主要原因;游离铁铝的络合-解离作用是底泥氟释放量和释放速率随着pH的降低、酸度的增强略有增大的主要原因。In the experimental study,three lakes named Huaaopao,Daozipao and Dabusupao in west Jilin Province were selected as the study area to investigate the long-term（28 days） fluorine release from lacustrine sediments and the impact of pH value on fluorine release.The results show that the quantity of fluorine released from lacustrine sediments varied in a range of 37.31-223.03 mg/kg.The release rate of fluorine from lacustrine sediments to alkaline water varied in a range of 1.88-22.53 mg/（kg·d）,and that from lacustrine sediments to acidic water varied in a range of 0.71-5.41 mg/（kg·d）.The high release rate of fluorine from lacustrine sediments to alkaline water was mainly caused by the processes of fluorine solution containing minerals,peculiar adsorption of iron and aluminum oxides and replacement of clay containing fluorine with OH-.The complexation-dissociation of free iron and aluminum is the key factor that the quantity and rate of fluorine release from lacustrine sediments were increased slightly with the decrease of pH value and the increase of acidity.

关 键 词：PH 湖泊底泥 氟 释放速率 湖泊 吉林 

分 类 号：X524[环境科学与工程—环境工程]