脱硫海水排放对附近海域的生态环境影响初步研究

A Preliminary Study of the Impact of Discharge Water from Seawater Flue Gas Desulphurization on the Ecological Environment of Surrounding Sea Area

通过跟踪监测华电青岛发电有限公司脱硫海水排放口附近海域的水质、表层沉积物质量和海洋生物群落结构,初步探讨了脱硫海水排放对海泊河口及附近海域生态环境的影响。结果表明:(1)脱硫海水特征污染物排放对排水口下游水域会造成一定不利影响,主要表现在pH值和DO的明显降低以及水温的明显升高,影响范围局限于排水口下游400m范围内的河口段;(2)脱硫海水排放不会明显增加排水口下游COD、N、P的污染负荷;(3)脱硫海水排放未显著增加附近海域重金属的综合潜在生态危害程度,重金属的潜在污染风险较小;(4)调查海域冬、夏两季生物多样性较高,群落结构较稳定,脱硫海水排放未对生物群落结构和生物多样性造成明显的不利影响。

The impact of discharge water from seawater flue gas desulphurization on the ecological environment was assessed based on a tracking survey of the qualities of the seawater and surface sediment and the structure of the marine biocommunity in the sea area adjacent to the desulfurization outfall of Huadian Qingdao Power Co, Ltd. The results showed that. （1） the characteristic pollutants derived from the desulfurization drainage induced certain adverse effects, such as the decrease of the pH and DO values and the increase of water temperature mainly on the waters within 400 m in the channel of Haibo River downstream the desulfurization outfall; （2） the pollution burdens of COD, N, and P downstream of the outfall were not significantly increased by the desulfurization drainage; （3） the integrated potential ecological hazards of the heavy metals in the adjacent surface sediments were not increased by the desulfurization drainage, indicating few or no risks to sediments; （4） the biocommunity structure of the studied sea area was stable with a relatively high level of biodiversity in both winter and summer, suggesting no significant affection by the desulfurization drainage.