一种新的处理甲基汞废水的树脂:石油亚砜萃淋树脂

Petroleum-Sulfoxide Extract-Leach Resin: A New Resin for Treatment of Wastewater Containing Methylmercury

本文对从高硫原油很容易制取的一种新的廉价萃取剂——石油亚砜(PSO)所合成的树脂,即PSO萃淋树脂处理低浓度甲基汞废水的可能性进行了研究。研究结果表明:在中性范围内(pH5—8)树脂对甲基汞的吸附能力很强,吸附率≥99％(废水浓度为10—20ppb);随着流速的增加,吸附率下降幅度很小;树脂易再生, 十倍树脂体积的再生剂(4mol HCl),洗脱率可达97.9％,再生五个周期后,净化率未见明显变化;Mg^(2+)、Fe^(2+)(Fe^(3+)、Ag+、cu^(2+)、Hg^(2+)、PA(黄腐酸)及Cl^-的干扰实验表咀除Hg^(2+)、Ag+外,其他离子基本没有影响。

This paper presents the study on possibilities of treating low-concentrated methylmercury in wastewater by petroleum solfoxide (PSO) extract-leach resin, in which PSO as a chea(p extractant, can be obtained from raw oil containing high sulfur content. The experimental results were as follows: (1) the resin was avaiable to sorb more than 99% methylmercury (concentrations 10-20ppb) in pH range 5-8; (2) current velocity of effuent affected sorp-tion capacity. As the velocity increased from 0.5 ml/min to 5.0 ml/min, the sorption capacity decreased from 99.66% to 98.90% in bed column (diameter 0.8 cm, length 10.3 cm, resin weight 3.0 g); (3) the resin could be regenerated easily by means of eluting it with the re-generant (4mol HC1); (4) Mg(Ⅱ), Fe(Ⅱ), Fe(Ⅲ), Ag(Ⅰ), Cu(Ⅱ), Hg(Ⅱ), FA(fulvicacid) and Cl- ions had no influence on sorption capacity of the resin except Hg(Ⅱ) and Ag(Ⅰ).