CAJ | 학술논문

通过实验室水培试验研究不同浓度处理水平下Cu、Cd、Hg单一及其复合污染对少根紫萍叶绿素及脯氨酸浓度的影响。经观察分析,培养4天后,各处理组均呈现出不同程度的受害症状。同一浓度处理水平下,单一重金属污染对少根紫萍叶绿素的生态毒性效应为Cd〉Cu〉Hg。复合污染中Cu＋Cd和Hg＋Cu＋Cd对叶绿素的影响则表现为协同作用;Cd＋Hg复合浓度≤6.0＋4.0mg/L时表现为拮抗作用,复合浓度〉6.0＋4.0mg/L时表现为协同作用;Cu＋Hg复合浓度≤0.4＋4.0mg/L时表现为协同作用;复合浓度〉0.4＋4.0mg/L时表现为拮抗作用。随处理浓度的递增,脯氨酸含量均表现出一显著抗性峰,而后下降。
통과실험실수배시험연구불동농도처리수평하Cu、Cd、Hg단일급기복합오염대소근자평협록소급포안산농도적영향。경관찰분석,배양4천후,각처리조균정현출불동정도적수해증상。동일농도처리수평하,단일중금속오염대소근자평협록소적생태독성효응위Cd〉Cu〉Hg。복합오염중Cu＋Cd화Hg＋Cu＋Cd대협록소적영향칙표현위협동작용;Cd＋Hg복합농도≤6.0＋4.0mg/L시표현위길항작용,복합농도〉6.0＋4.0mg/L시표현위협동작용;Cu＋Hg복합농도≤0.4＋4.0mg/L시표현위협동작용;복합농도〉0.4＋4.0mg/L시표현위길항작용。수처리농도적체증,포안산함량균표현출일현저항성봉,이후하강。
Through the water culture experiment in laboratory, the effect of pollution by single one of Cu, Cd, Hg and their combination with different concentrations on the chlorophyll and praline concentration in the Spirodela Oligorrhiza were studied. According to the observation and analysis, it found that after culture by four days every treatment appeared poisoning symptoms in different degree. At the same concentration level, the poison effects of single metal on the chlorophyll of Spirodela Oligorrhiza ranked as Cd 〉 Cu 〉 Hg. The poison of combination of Cu ＋ Cd and Cu ＋ Cd ＋ Hg appeared synergistic effect; when the concen- tration of Cd ＋ Hg combination was less than or equal to 6.0 ＋ 4. 0 mg/L it appeared antagonist effect, otherwise it appeared synergistic effect; when the concentration of Cu ＋ Hg combination was less than or equal to 0. 4 ＋ 4. 0 mg/L it appeared antagonist effect, otherwise it appeared synergistic effect. With the increasing pollutant concentration, proline content appeared an obvious antagonist peak, and then droped.