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燃煤电厂烟气脱硫海水中汞的水-气迁移

燃煤电厂烟气脱硫海水中汞的水-气迁移
袁东星*,刘锡尧,孙鲁闽
厦门大学近海海洋环境科学国家重点实验室,厦门大学环科中心,361005,厦门
E-mail: yuandx@http://www.1mpi.com

配有海水烟气脱硫装置(SWFGD)的沿海燃煤电厂所排放的脱硫海水中,含有源自煤中的汞。脱硫海水经简单曝气处理后直接排入海域。本研究对SWFGD废水中的汞在曝气池和排放海域


中的迁移行为进行了探讨。初步研究结果表明,电厂曝气池海水中的汞浓度很高;除排水口外,排放海域水中的汞浓度并不高。海水中汞的浓度越高,其上方大气中汞的浓度也越高。另外,汞从海水迁移至排放海域的沉积物及生物体的现象并不明显。这些结果提示,脱硫海水中的大部分汞,将在曝气池或排水口迁移至大气。


关键词:汞;烟气脱硫海水;迁移。

参考文献:
[1] Nriagu, J. O. A. Nature, 1989, 338(6210), 47-49.
[2] Liang, Y.; Liu, X.; Yuan, D.; Gong, Z.; Zhang, Z. Water Environ. Res. 2010, 82,
DOI: 10.2175/106143009X12487095236793.

Water-air Transfer of Mercury in Seawater Discharged from a Coal-Fired Power Plant

Dong-Xing Yuan*, Xi-Yao Liu, Lu-Min Sun
State Key Lab of Marine Environmental Science,
Environmental Science Research Center, Xiamen Univ., 361005, Xiamen
  
The waste seawater discharged from coal-fired power plants equipped with seawater flue gas desulfurization (SFGD) systems in coastal areas might carry Hg that originally from coal into the adjacent seas, after a simple process of aeration. This research targeted at Hg in waste seawater discharged from a SFGD system, to study the Hg transfer process in the aeration pool and nearby waste seawater receiving sea area. The primary study shows that high concentration of Hg was observed in waste seawater of the aeration pool, but low concentration in adjacent sea area except where near the waste seawater discharging outlets. Hg concentration in the air was higher as its concentration in seawater increased. On the other hand, Hg transferring from seawater into the sediment and biota was not obvious. The results s

uggested that Hg in the waste seawater finally transfers into the atmosphere from the aeration pool and sea area near the discharging outlets.

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