CAJ | 학술논문

利用静态模拟实验装置研究了藻源性黑水团发生过程中沉积物表层上覆水和沉积物间隙水中 Fe-S-P 的变化过程.结果表明：加入藻细胞后很快形成厌氧、还原环境,使得沉积物中Fe-S-P发生强烈的生物地球化学变化；实验第1d,表层上覆水中的Fe2+、SO42-、S2-含量高达4.993,242.0,387.57mg/L,为对照样柱中的1.8倍、2.2倍和18.8倍；在沉积物4cm处其浓度分别为8.5,40.0,65.3mg/L.随后,沉积物表层上覆水中 Fe2+、S2-含量表现出一个先快速增加、随后降低的趋势,其浓度分别在实验的第3,2d 达到最大值为11.1,634.6mg/L.沉积物中PO43--P浓度受Fe-P解析等具有滞后性,从实验的第2d后开始直至实验结束时表现为其含量持续增加,到实验结束时其浓度为39.450mg/L,为对照样柱中的242倍.上覆水和间隙水中Fe-S-P含量的变化,反映了藻华聚集形成的厌氧环境中发生了剧烈的生物地球化学反应,从而使得沉积物中形成的Fe2+、S2-和 PO43--P不断向上覆水体中扩散,对形成黑水团的水体生态系统的恢复造成阻碍和不良影响.
이용정태모의실험장치연구료조원성흑수단발생과정중침적물표층상복수화침적물간극수중 Fe-S-P 적변화과정.결과표명：가입조세포후흔쾌형성염양、환원배경,사득침적물중Fe-S-P발생강렬적생물지구화학변화；실험제1d,표층상복수중적Fe2+、SO42-、S2-함량고체4.993,242.0,387.57mg/L,위대조양주중적1.8배、2.2배화18.8배；재침적물4cm처기농도분별위8.5,40.0,65.3mg/L.수후,침적물표층상복수중 Fe2+、S2-함량표현출일개선쾌속증가、수후강저적추세,기농도분별재실험적제3,2d 체도최대치위11.1,634.6mg/L.침적물중PO43--P농도수Fe-P해석등구유체후성,종실험적제2d후개시직지실험결속시표현위기함량지속증가,도실험결속시기농도위39.450mg/L,위대조양주중적242배.상복수화간극수중Fe-S-P함량적변화,반영료조화취집형성적염양배경중발생료극렬적생물지구화학반응,종이사득침적물중형성적Fe2+、S2-화 PO43--P불단향상복수체중확산,대형성흑수단적수체생태계통적회복조성조애화불량영향.
The process of biogeochemical cycle change of Fe-S-P in overlying water, sediment pore water was studied in a laboratory using a static simulating device which simulated the algae-caused black-spots. Drastic biogeochemical changes of Fe-S-P happened in an anaerobic and reducing sediment environment after algae cells were added. Concentration of Fe2+, SO42-and S2-in interface of sediment-water was 4.993, 242.0, 387.57mg/L, respectively at 1st day after algae cells added, and it was the 1.8, 2.2and 18.8times higher than the contrast experiments in the same period;and the concentration of Fe2+, SO42- and S2- was 8.5mg/L, 40.0mg/L and 65.3mg/L, respectively in 4cm deep sediments. Then, Fe2+ and S2-concentration in overlying water showed a rapid increase and followed a falling trend, and its concentration reached maximum at the 2nd and 3rd day, value of 11.1mg/L and 634.6mg/L. Concentration of PO43--P in sediment increased slowly due to Fe-P desorption, and its content increased continuously from the 2nd day until the end of experiment. After adding algae cells, the concentration reached 39.450mg/L which was 242times higher than the control experiment; and also up to 10.74mg/L in 4cm deep sediment. The rapid changes of Fe-S-P indicated biogeochemical reaction in an anaerobic and reducing sediment environment after algae cells were added, and caused the Fe2+, S2-and PO43--P to diffuse into the overlying water. The algae-caused black-spot posed huge difficulties to the restoration of water ecosystems.