摘要
介绍了我国含汞废水的来源与特点,对现有的处置技术进行了梳理和分析,明确了现有各类技术的原理、优缺点及适用性。认为现有技术主要问题是沉渣量大难以处置、达标困难、成本偏高等,难以完全去除金属汞。对高含量汞(质量浓度≥156 mg/L)酸性废水可采用Cl-将汞转化为Hg Clxx-2,在紫外光解条件下还原为Hg2Cl2而回收;对低含量汞(质量浓度≤1.5 mg/L)酸性废水可采用在酸性条件下使用廉价吸附剂深度净化;对一般性含汞废水可采用改进的硫化钠沉淀技术和深度吸附技术(分别适用于汞的质量浓度20～315、≤0.2 mg/L);对实验室废水为避免Cl-干扰,可采用阳离子交换树脂吸附技术(适用于汞的质量浓度≤0.1 mg/L)。
The origin and characteristics of mercury-containing wastewater in China was introduced, the existing disposal technologies were collated and analyzed, and the principle, advantages, disadvantages and applicability of all kinds of existing technologies were clarified. It was pointed out that the main problem existing in the prior art was that, it was difficult to handle a large amount of deposits, difficult to meet the standard, the cost was high and could not remove mercury entirely. For high-mercury content （≥ 156 mg/L） acid wastewater, using chloride ion to convert mercury into HgClx^x-2, which could be reduced to mercury chloride under UV photolysis conditions for recycle. For low mercury content （ ≤ 1.5 mg/L） acidic wastewater, that could be purified by using cheap adsorbent under acidic conditions. Improved sodium sulfide precipitation technology could be used for general mercury-containing wastewater （applicable to 20-315 mg/L） and deep adsorption technology （≤0.2 mg/L）. For laboratory wastewater in order to avoid chloride interference, using cation exchange resin adsorption technology could be used when mass concentration of mercury was 0.1 mg/L.
作者
李宝磊
邵春岩
陈刚
张正洁
LI Baolei;SHAO Chunyan;CHEN Gang;ZHANG Zhengjie(Shenyang Academy of Environmental Sciences,Shenyang 110167,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第11期1-4,共4页
Technology of Water Treatment
基金
国家公益性行业科研专项经费环保项目(201509054)
关键词
含汞废水
水俣公约
硫化物沉淀
新型复合吸附剂
有机硫螯合剂
阳离子树脂吸附
mercury-containing wastewater
minamata convention
sulfide precipitation
new composite adsorbent
organic sulfur chelating agent
cation resin adsorption
