【摘要】：研制了基于電化學媒介體法的水體總毒性在線檢測儀器,通過對比水樣和標樣中微生物的呼吸活性差異,實現(xiàn)對水體總毒性的在線監(jiān)測。毒性檢測的受試體微生物為原位培養(yǎng)微生物。電化學檢測采用三電極系統(tǒng),其中鉑微陣列電極、Ag/Ag Cl(3 mol/L KCl)電極和金絲電極分別作為工作電極、參比電極和對電極。對濃度為5.0、10.0和20.0 mg/L的模型毒物3,5-二氯苯酚(DCP)進行檢測,獲得的微生物呼吸活性抑制率分別為24.4%、48.9%和59.2%。在連續(xù)在線監(jiān)測過程中,儀器能夠?qū)λ须S機加入毒性物質(zhì)(5.0 mg/L DCP)的水樣輸出毒性警報(以10%的呼吸抑制率為毒性報警臨界值),表明此儀器可以用于水體總毒性在線檢測和預警。
[Abstract]:An on-line instrument for the detection of total toxicity of water body based on electrochemical vector method was developed. By comparing the respiration activity of microorganisms in water sample and standard sample, the on-line monitoring of total toxicity of water body was realized. The microbes tested for toxicity were in situ cultured microbes. Three-electrode system was used for electrochemical detection, in which platinum microarray electrode, Ag/Ag Cl (3 mol/L KCl) electrode and gold wire electrode were used as working electrode, reference electrode and opposite electrode respectively. The results showed that the inhibition rates of microbial respiratory activity were 24.48.9% and 59.2%, respectively, when the concentration of 5. 0 mg/L and 20. 0 mg/L of the model poison 3- 5-dichlorophenol was detected, and the results showed that the inhibition rates of microbial respiratory activity were 24. 489% and 59. 2%, respectively. During continuous on-line monitoring, the instrument is able to output toxicity alerts to all water samples that are randomly added with toxic substances (5.0 mg/L DCP) (with a 10% respiratory inhibition rate as the threshold for toxicity alarm), It shows that this instrument can be used for on-line detection and early warning of total toxicity of water.
【作者單位】： 中國科學院長春應用化學研究所電分析化學國家重點實驗室;
【基金】：國家自然科學基金項目(Nos.21675151,21405148) 科技部項目(Nos.2016YFA0203200,2013YQ17058501) 吉林省科技廳項目(No.20150520010JH)資助~~
【分類號】：TH83;X853

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