一种巯基螯合剂的合成及处理镍矿废水的研究  

Synthesis of Thiol Chelating Reagent and Its Application in Treating Nickel Ore Beneficiation Wastewater

作　　者：彭青林[1] 李侠[1] 田文武 湛雪辉[1] 李朝辉[1] 曹芬[1] 

机构地区：[1]长沙理工大学化学与生物工程学院,湖南长沙410114 [2]张家界永定区三家馆乡中心学校,湖南张家界427000

出　　处：《矿冶工程》2011年第6期77-81,共5页Mining and Metallurgical Engineering

基　　金：湖南省科技攻关项目(2010NK3002;2011CK3069)

摘　　要：由对甲基苯硫酚和甲醛在氢氧化钠水溶液中反应,合成了新型螯合剂2-羟甲基-4-甲基苯硫酚,并对其进行了红外表征。考察了不同对甲基苯硫酚与甲醛摩尔比、氢氧化钠用量、反应温度和反应时间条件下螯合剂对镍离子去除率的影响。处理镍离子浓度为625 mg/L镍矿废水,一次性投加理论量1.3倍的螯合剂或镍质量17.8倍的混合药剂,镍离子浓度分别下降为0.98 mg/L和0.85 mg/L,完全达到国家标准。同时螯合沉淀物经12 mol/L盐酸解螯合,解螯合率达97%以上。A new chelating reagent （2-mercapto-4-methyl-phenyl）-methanol was synthesized using p-methyl-benzenethiol and formaldehyde in sodium hydroxide solution and was characterized by FT-IR. The effects of tool ratio of p-methyl-benzenethiol to formaldehyde, dosage of NaOH, reaction temperature and time on the removal of nickel ions by the chelating reagent were investigated. When the benefieiation wastewater with 625 mg/L nickel ions was treated, adding chelator 1.3 times the theoretical amount or mixed agents 17.8 times the nickel mass could reduce the nickel content to 0.98 mg/L or 0.85 mg/L, which meets the national discharge standard. The chelated precipitant was eluted by 12 mol/L hydrochloric acid, resulting in desorption yield beyond 97%.

关 键 词：废水处理 2-羟甲基4-甲基苯硫酚 螯合剂 镍废水 

分 类 号：X705[环境科学与工程—环境工程]