CAJ | 학술논문

为研究东平湖不同生物量菹草腐烂对上覆水硫化物和SO2－4浓度的影响，将杀青后的菹草按0．1、1、5、10 g／L的生物量梯度分别投放进装有超纯水的烧杯中，并置于25℃的恒温培养箱中。在不同时刻测定了上覆水的pH值、溶解氧、硫化物和SO2－4的浓度，并采用气－液双膜传质模型估算了上覆水H2 S的扩散速率。结果表明：菹草分解过程中，生物量越大，DO浓度的降低越显著且恢复越缓慢，但pH值的变化恰好相反；硫化物浓度、SO2－4浓度和H2 S扩散速率均随菹草生物量的增加而显著增加，但至试验结束均各自趋于一致；硫化物浓度和H2 S扩散速率均呈上升—下降的变化趋势，较高生物量培养下SO2－4浓度在第1天达到峰值后逐渐降低；试验期间H2 S的扩散总量与菹草生物量存在显著的指数增长关系。
위연구동평호불동생물량저초부란대상복수류화물화SO2－4농도적영향，장살청후적저초안0．1、1、5、10 g／L적생물량제도분별투방진장유초순수적소배중，병치우25℃적항온배양상중。재불동시각측정료상복수적pH치、용해양、류화물화SO2－4적농도，병채용기－액쌍막전질모형고산료상복수H2 S적확산속솔。결과표명：저초분해과정중，생물량월대，DO농도적강저월현저차회복월완만，단pH치적변화흡호상반；류화물농도、SO2－4농도화H2 S확산속솔균수저초생물량적증가이현저증가，단지시험결속균각자추우일치；류화물농도화H2 S확산속솔균정상승—하강적변화추세，교고생물량배양하SO2－4농도재제1천체도봉치후축점강저；시험기간H2 S적확산총량여저초생물량존재현저적지수증장관계。
In order to study the impact of decomposition of different biomass of Potamogeton crispus on the sulfur concentrations in overlying water, Potamogeton crispus collected from Dongping Lake in early May of 2011 was killed and dried to a constant weight,and then put in beakers with ul-trapure water according to the biomass gradient of 0. 1,1,5 and 10 g/L. The beakers were placed in an incubator and kept at 25℃ for 39 days. The pH values and concentrations of DO,sulfide and SO4 2- in the overlying water were determined at the different time of the experiment,and dif-fusion rates of H2 S were estimated by using the classical two-film mass transfer model. The results show that in the decomposition process of Pota-mogeton crispus,concentrations of DO in overlying water descends more rapidly and then ascends more slowly as the biomass increased,while the change of pH values is just the opposite. SO4 2- concentrations and H2 S diffusion rates increase more significantly with the biomass increasing,but they closely reach to a same level at the end of the experiment respectively. Sulfide concentrations and H2 S diffusion rates firstly increase and then decrease. SO4 2- concentrations in the relatively high biomass reach to the maximums in the first day,and then declines. Exponential correlation is found between the total amounts of H2 S emission and the biomass of potamogeton crispus.