化纤废水中污染物对大型(Daphnia magna)繁殖的影响

Effects of pollutants in chemical fibre wastewater on reproduction of Daphnia magna

为研究化纤工业对水域生态的长期效应，首次在实验室研究了化纤工业废水中主要污染物乙醛、对苯二甲酸、乙二醇对大型（Ｄａｐｈｎｉａｍａｇｎａ）生殖周期和繁殖数量的影响。实验结果表明，乙醛浓度低于６ｍｇ／Ｌ时，对大型首次和第二次生殖周期无影响。７～１０ｍｇ／Ｌ时，使首次生殖周期推迟１～２ｄ，使第二次生殖周期提前１～２ｄ。对苯二甲酸浓度３２ｍｇ／Ｌ以下时，对首次和第二次生殖周期基本无影响；６４～２５６ｍｇ／Ｌ时，使首次生殖周期均推迟１～２ｄ，第二次生殖周期均缩短１～２ｄ。乙二醇浓度在１０００ｍｇ／Ｌ以下时，对首次生殖周期无影响；２０００～４０００ｍｇ／Ｌ时，推迟首次生殖周期１ｄ；浓度低于４０００ｍｇ／Ｌ时，对第二次生殖周期无影响。乙醛浓度在５ｍｇ／Ｌ以下时，对首次和第二次繁殖数量无显著影响，浓度在６～１０ｍｇ／Ｌ时，显著降低其繁殖数量，分别降低３８．３％～７４．１％和１２．８％～６５．３％。对苯二甲酸浓度低于３２ｍｇ／Ｌ时，对首次繁殖数量无显著影响，浓度在６４～２５６ｍｇ／Ｌ时，降低首次繁殖数量６２．９％～７５．３％；浓度低于１６ｍｇ／Ｌ时，对第二次繁殖数量无显著影响，浓度在３２～２５６ｍｇ／Ｌ时，使第二次繁殖数?

狪n this paper, the effects of main pollutants acetaldehyde, pphthalic acid and ethylene glycol in fibre wastewater on reproduction of Daphnia magna were first investigated. Experimental results show that acetaldehyde at concentration lower than 6 mg/L has no influence on first and second reproduction periods of Daphnia magna;and at concentration of 7～10 mg/L delays first reproduction period of Daphnia magna by 1～2 days and shortens second reproduction periods by 1～2 days. pphthalic acid at concentration lower than 32 mg/L has no influence on first and second reproduction periods, and at concentration of 64 ～ 256 mg/L delays first reproduction period by 1～2 days and second reproduction period shortens by 1～2 days. Ethylene glycol at concentration lower than 1000 mg/L has no poor influence on first reproduction period;and at concentration of 2000～4000 mg/L delays first reproduction period by 1 day;and at concentration lower than 4000 mg/L has no influence on second reproduction period. Acetaldehyde at concentration lower than 5 mg/L has no influence on first and second reproduction numbers of Daphnia magna;and at concentration of 6～10 mg/L decreases first and second reproduction numbers by 38.3%～ 74.1% and 12.8% ～65.3%, respectively. pphthalic acid at concentration lower than 32 mg/L has no influence on first reproduction number;and at concentration of 64～256 mg/L,decreases first reproduction number by 62.9% ～75.3%,while at concentration lower than 16 mg/L has no influence on second reproduction number,and at concentration of 32～256 mg/L,decreases second reproduction number by 37.8%～78.1%. Ethylene glycol at concentration lower than 500 mg/L has no influence on first and second reproduction numbers, and at concentration of 1000～4000 mg/L, decreases first and second reproduction numbers by 32.3%～77.8% and 42.2%～60.9% respectively.