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The effect of recycled waste oyster shell powder applied to organically enriched marine sediment as oxygen releasing compound
Indian Journal of Geo-Marine Sciences ( IF 0.4 ) Pub Date : 2020-11-25
M A Khirul, B G Kim, D Cho, S H Kwon

Eutrophic influx, being accumulated in marine sediments and its releases into the overlying water body are very important in most of the coastal areas in Korea. Nitrogen and sulfur are regarded as the most attentive elements in the metabolism of the marine ecosystem. The two groups of contaminants could be transformed into corresponding reduced compounds inside the sediment environment and its release into ambient water from sediments may have a significant impact on water quality resulting in increased eutrophication. In order to evaluate the remediation ability of ultrasound treated oyster shell powder (OSP) and raw oyster shell powder (OSP) applied to organically enriched sediments in terms of suppressing nutrient flux and acid volatile sulfides (AVS). The ultrasound treated OSP was found to be oxygenated to rather peroxide as oxygen releasing compound. The application of treated OSP decreased the concentrations of ammonium nitrogen, acid volatile sulfide, and chemical oxygen demand, whilst it increased dissolved oxygen, sulfate, and nitrate concentration significantly in the overlying water compared to the raw OSP applied basin with control. The treated OSP was successfully tested as a controlled oxygen releasing compounds (ORC) in the organically enriched sediment to reduce eutrophication. Denaturing gradient gel electrophoresis (DGGE) and community phylogenetic affiliation analyses revealed that nitrifying/denitrifying bacteria and sulfur-mediating bacteria were positively involved in the simulation experiments. It should be noted that α- and β- Proteobacteria (sulfur-oxidizing bacteria) were commonly identified in the microflora of sediment applied with the oxygenated oyster powder.

中文翻译:

牡蛎壳废料再生粉作为释氧化合物应用于有机富集海底沉积物中的作用

在韩国大部分沿海地区,富营养化涌入积累在海洋沉积物中并释放到上层水体中非常重要。氮和硫被认为是海洋生态系统新陈代谢中最关注的元素。两组污染物可以在沉积物环境中转化为相应的还原性化合物,其从沉积物中释放到环境水中可能会对水质产生重大影响,导致富营养化增加。为了评估超声处理的牡蛎壳粉(OSP)和生蚝壳粉(OSP)应用于有机富集沉积物中的修复能力,从抑制营养素通量和酸挥发性硫化物(AVS)的角度出发。发现超声处理的OSP被氧化为氧释放化合物而成为过氧化物。与采用对照的原始OSP盆相比,使用经过处理的OSP降低了铵态氮,酸性挥发性硫化物和化学需氧量的浓度,同时显着提高了上覆水中的溶解氧,硫酸盐和硝酸盐浓度。处理过的OSP已成功测试为有机富集沉积物中的氧释放控制化合物(ORC),以减少富营养化。变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是 与采用对照的原始OSP盆相比,使用经过处理的OSP降低了铵态氮,酸性挥发性硫化物和化学需氧量的浓度,同时显着提高了上覆水中的溶解氧,硫酸盐和硝酸盐浓度。处理过的OSP已成功测试为有机富集沉积物中的氧释放控制化合物(ORC),以减少富营养化。变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是 与采用对照的原始OSP盆相比,使用经过处理的OSP降低了铵态氮,酸性挥发性硫化物和化学需氧量的浓度,同时显着提高了上覆水中的溶解氧,硫酸盐和硝酸盐浓度。处理过的OSP已成功测试为有机富集沉积物中的氧释放控制化合物(ORC),以减少富营养化。变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是 与原始OSP对照盆相比,上覆水中的硝酸盐浓度显着增加。处理过的OSP已成功测试为有机富集沉积物中的氧释放控制化合物(ORC),以减少富营养化。变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是 与原始OSP对照盆相比,上覆水中的硝酸盐浓度显着增加。处理过的OSP已成功测试为有机富集沉积物中的氧释放控制化合物(ORC),以减少富营养化。变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是 变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是 变性梯度凝胶电泳(DGGE)和群落系统进化关系分析表明,硝化/反硝化细菌和介导硫的细菌积极参与了模拟实验。应该注意的是通常在含氧牡蛎粉的沉积物菌群中鉴定出α-β-变形杆菌(硫氧化细菌)。
更新日期:2020-11-25
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