应用BCR法提取硫酸废渣中的氟  

BCR Modified Sequential Extraction Procedure for Fluorine in Slag of Sulfuric Acid

作　　者：罗春红[1] 张华玲[1] 吴颖娟[1] 王津[1] 

机构地区：[1]广州大学环境科学与工程学院,广东广州510006

出　　处：《环境科学与技术》2014年第3期113-116,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目资助(41173100);国家级大学生创新训练项目(201211078015);广州市教育局项目(10A029)

摘　　要：应用改进的BCR法分级提取了硫酸生产过程水洗和酸洗流程中沸腾炉渣、沉灰渣和外排综合渣的氟形态,分析了3种硫酸废渣中总氟与各形态氟的相关性,采用相关分析的t检验法进行检验。结果表明:沉灰渣总氟与酸交换态氟含量最高,外排综合渣次之,沸腾炉渣最少。相关分析显示,2种流程中总氟与酸交换态氟(水洗r=0.950,酸洗r=0.829),总氟与残渣态氟(水洗r=0.982,酸洗r=0.958),酸交换态氟与残渣态氟(水洗r=0.877,酸洗r=0.708),可氧化态氟与易还原态氟(水洗r=0.780,酸洗r=0.672)显著相关,表明它们相互间可转化。经t检验,2种流程中,残渣态氟可经酸交换或氧化还原反应被活化,总氟与各形态氟,可氧化态氟与易还原态氟能相互转化。Fluorine forms in the boiling slag, dreg and out-synthetic slag from water washing or acid washing process of sulfuric acid production were extracted by using improved BCR sequential extraction procedure, correlation coefficients be-tween total-F and various forms-F were analyzed and t-test of correlative coefficient was used in three kinds of sulfuric acid slag. Results showed contents of total-F and acid exchange-F in the dreg were the highest, followed with out-synthetic slag and boiling slag. The con-analyses showed that total-F was significantly correlated with acid exchange-F with water washing coefficient as 0.950 and acid washing coefficient as 0.829, total-F was significantly correlated with residual-F with water washing coefficient as 0.982 and acid washing coefficient as 0.958, acid exchange-F was significantly correlated with re-ducible-F with water washing coefficient as 0.877 and acid washing coefficient as 0.708, oxidation-F was significantly cor-related with reduction-F with water washing coefficient as 0.780 and acid washing coefficient as 0.672, which indicated they can change each other. Residual-F will get active via acid exchange or redox reaction. Total-F and various forms-F can change each other, either can oxidation-F and reduction-F.

关 键 词：硫酸废渣 BCR 氟 

分 类 号：X132[环境科学与工程—环境科学]