摘要
以水溶性酚醛树脂为交联固化剂,天然腐植酸为原料,制备了颗粒状腐植酸树脂;研究了该腐植酸树脂对Cr(Ⅵ)和Cr(Ⅲ)分离富集性能。结果表明:腐植酸树脂对Cr(Ⅵ)和Cr(Ⅲ)有较强的吸附能力,改变介质的pH,实现Cr(Ⅵ)和Cr(Ⅲ)的分离富集。建立了腐植酸树脂分离富集,火焰原子吸收测定铬形态的新方法,用于自来水和清洁地表水中Cr(Ⅵ)和Cr(Ⅲ)的测定,结果满意。
The humic acid resins were prepared from crosslinked phenolic resin and humic acids. The ad- sorption characteristics of Cr （Ⅵ） and Cr （Ⅲ） on the humic acid resins was investigated. The results show that Cr（Ⅵ） can be adsorbed quantitatively on humic acid resins when the pH is under 1, while Cr （Ⅲ） cant be adsorbed; when the pH value is higher than 5, Cr（Ⅲ） can be adsorbed, while Cr（Ⅵ） cant be adsorbed. Accordingly, Cr（Ⅵ） and Cr（Ⅲ） can be separated solvent. Cr（Ⅵ） and Cr（Ⅲ） adsorbed on the humic acid resins can by changing the pH value of the be eluted completely using 0.5 mol/L NaOH and 1 mol/L HC1 solution, respectively, and the relative content of Cr（Ⅵ） and Cr（Ⅲ） can be determined using FAAS. In summary, a new method was found to enrich and separate chromium with different chemical state in water and this method has been successfully applied to the determination of Cr（Ⅵ） and Cr（Ⅲ） in fiver water and tap water.
出处
《电镀与精饰》
CAS
2008年第3期32-34,共3页
Plating & Finishing
