Deriving freshwater quality criteria of sulphocyanic sodium for the protection of aquatic life in Ch

来源 :环境科学 | 被引量 : 0次 | 上传用户:flexrhythm
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The freshwater quality criteria of sulphocyanic sodium(NaSCN) were studied on the basis of the features of the aquaticbiota in China, and with Reference to U.S.EPAs guidelines. Acutetests were performed on twelve different domestic species todetermine 48h-EC50/96h-EC50 (or 96h-LC50) values for NaSCN. 21dsurvival-reproduction test with Daphnia magna, 60d fry-juvenilepart life stage test with Carassius auratus gibelio and 96h growthinhibition test with Lemna minor were also conducted to estimatelower chronic limit/upper chronic limit values. In the acute tests,D.magna was the most sensitive species to NaSCN followed by Tilapiamossambia, Cyprinus carpio and C.auratus gibelio in turn. The finalacute value of NaSCN was 2.699 mg/L. In the chronic tests,reproduction of daphnids were significantly reduced by NaSCN at 1.0mg/L. Acute-to-chronic ratios ranged from 5.96 to 19.1. A finalchronic value of 0.2530 mg/L was obtained and a final plant valuewas 1346 mg/L. A criterion maximum concentration (1.349 mg/L) anda criterion continuous concentration (0.2530 mg/L) were derivedrespectively. The results of this study may provide useful data toderive national WQC for NaSCN as well as the procedures of derivingWQC of other chemicals for the protection of aquatic biota in China.
其他文献
This paper tries to integrate game theory, a very usefultool to resolve conflict phenomena, with optimal capital costallocation issue in total emission control.
Based on the determination of several trace elements in coal particulate of different specific gravity, three-variables regression equations relate the contents
In accordance with principle sand methods of ecology,this paper studied the effects of acidic deposition on productivity and volume increment of masson pine and
Beijing has been experiencing a severe shortage ofwater. At present serious wastes of water resources result fromthe unreasonable structure of water uses in var
The effect of lead, cadmium and zinc on thetranscriptions and structures of 5 DNA fragments was studied by RNAslot blot hybridization and the analyze of Restric
Based on wet air oxidation (WAO) and Fenton reagent, thispaper raises a new low pressure wet catalytic oxidation(LPWCO)which requires low pressure for the treat
本文对干旱区内陆河流域下游具有代表性的渭干河-库车河三角洲绿洲土地资源特征和存在的问题进行了详细的分析,分析表明,土地资源数量大、质量差、利用率低,土壤类型多;草场
A solvent extraction procedure for the quantitativeextraction of trace levels of methylgermanium species as theirchloride complex has been developed and the ext
双主干、多通道、双主机企业计算机网络系统具有高可靠性、高安全性、可持续发展和方便灵活等特点,为企业网络系统建设提供了一种行之有效的解决方案。本文结合安庆石化企业
Over the past decade, the term" sustainable development"has emerged as the principal concept in the development field. The concept emerged in the 1970s and was