研究论文
周启星,高拯民.沈阳张士污灌区镉循环的分室模型与污染防治对策研究[J].环境科学学报,1995,15(3):273-280
沈阳张士污灌区镉循环的分室模型与污染防治对策研究
- COMPARTMENTAL MODEL OF CADMIUM CYCLE AND POLLUTION-CONTROL COUNTERMEASURES IN THE ZHANGSHI SEWAGE-IRRIGATION AREA OF SHENYANG
- 摘要：对沈阳张士污灌区大气、水、土壤和生物各分室中Cd的库存量和各分室间Cd的循环通量进行了研究,建立了土壤-水稻系统中Cd流分室模型。该模型表明,Ⅱ闸和Ⅲ闸地区土壤分室中Cd的库存增量均为正值。可见,该污灌区近年来Cd污染程度由于污水灌溉仍然处于加剧的趋势。研究最后指出,该污灌区Cd的污染防治对策主要是减少污水灌溉量、进一步降低灌溉水中Cd的浓度和通过富Cd植物收获带走Cd.其中,以野生苋的收获带走Cd最有意义,它可使Ⅱ闸和Ⅲ闸地区Cd的下降速率分别依次达到29.49和22.81mg/(m2·a).
- Abstract：Reservoirs of Cd in air,water,soil and organism components of the Zhangshi Sewage-Irrigation Area in Shenyang and fluxes of Cd cycle among the compartments were studied.Compartment models of Cd flow in the soil-rice systems were constructed.The models showthat the increase of Cd pcol in soil compartments of the Gate Ⅱ and Ⅲ was positive. It ap-pears that polluation of Cd in the area was aggravating in receht years due to sewage irriga-tion. The results revealed that pollution-control countermeasures for the area may mainly in-clude the reduction of sewage irrigation,the further decrease in the concentration of irrigat-ed water and the Cd remove by harvesting Cd-accumulation plants,of which,the remove ofCd by harvesting wild amaranth(Amaranthus tricolor) was most effective. The decline rateof Cd at the Gate Ⅱ and Ⅲ due to application of the method was 29.49 and 22. 81 mg/(m2·a),respectively.
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