Laboratory experiments using crushed pumice

Sedimentary oxygen demand laboratory experiment An incubation experiment using sediment cores was conducted to assess the effect of using crushed pumice as a sand-capping material to suppress sediment oxygen consumption. Sedimentary nutrient release rate laboratory experiment The sediment nutrient release experiment was conducted using the sediment cores, to assess the effect of using crushed pumice as a sand-capping material to suppress nutrients release from sediments. Nutrient adsorption experiment The artificial seawater in the beaker was continuously stirred during the experiment, and the crushed pumice was kept in suspension throughout the experiment. Nutrient concentrations were monitored to evaluate nutrient adsorption rates by crushed pumice. Exposure experiment Exposure experiments were conducted with crushed pumice in suspension to examine the effects of the resuspension of crushed pumice on bivalves.沉积物需氧量实验室试验（Sedimentary oxygen demand laboratory experiment） 采用沉积物岩心开展培养试验，以评估碎浮石作为砂覆盖材料对抑制沉积物耗氧的效果。 沉积物营养盐释放速率实验室试验（Sedimentary nutrient release rate laboratory experiment） 采用沉积物岩心开展沉积物营养盐释放试验，以评估碎浮石作为砂覆盖材料对抑制沉积物营养盐释放的效果。 营养盐吸附试验（Nutrient adsorption experiment） 试验过程中持续搅拌烧杯内的人工海水，使碎浮石在试验全程保持悬浮状态，通过监测营养盐浓度以评价碎浮石对营养盐的吸附速率。 暴露试验（Exposure experiment） 开展悬浮状态下碎浮石的暴露试验，以探究碎浮石再悬浮对双壳类生物的影响。