• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Harmful Algae >Using flocculation and subsequent biomanipulation to control microcystis blooms: A laboratory study
【24h】

Using flocculation and subsequent biomanipulation to control microcystis blooms: A laboratory study

机译：使用絮凝和随后的生物扫描来控制微阴压盛开：实验室研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The frequent occurrence and long-term duration of Microcystis harmful algal blooms (HABs) are of great concern. Chemical flocculation is thought to be an effective way to deal with the HABs, while the application of the flocculants at a high dosage pose potential adverse impacts to the aquatic ecosystems. In this study, an alter-native approach is proposed that involves the employment of polyaluminum chloride (PAC) combined with the Daphnia magna (D. magna) to achieve sustainable HABs removal efficiency with an acceptable ecological risk. It was found that under a dense Microcystis HABs (algal density of 1.5 x 10(7) cells/ml), a PAC dosage of 30 mg/l triggered 95% algae removal, but the released Al3+ caused 90% mortality of planktonic D. magna. Reducing the PAC dosage to 15 mg/l resulted in a slightly lower algal removal efficiency (90%). In addition the reduced PAC dosage benefited the proliferation of the remaining unicellular algal cells, which tended to form a large colony during the 25-day experiment. Incubation of D. magna following flocculation with 15 mg/l PAC effectively grazed the remaining algal cells, meanwhile increasing the D. magna density by approximately 40-folds, and enlarging the body size by 1.37-1.50 times. This result implied that the released Al3+ was not detrimental to the D. magna. Flocculation with a reduced dosage is sufficient for colonial and large algal cells mitigation, which creates a window time for the biomanipulation of the residual tiny algae. Hence, the subsequent addition of D. magna triggered the sustainable removal of the HABs cells. The present study provides an environmentally friendly strategy for cleaning up the green tides without obvious detrimental effects on the aquatic ecosystem.
机译：微囊杆菌有害藻类盛开（HABS）的频繁发生和长期持续时间非常关注。化学絮凝被认为是处理汉族的有效方法，而絮凝剂在高剂量施加潜在的不利影响对水生生态系统。在这项研究中，提出了一种涉及聚氨氯化聚氨氨氨氨醇（PAC）与Daphnia Magna（D. Magna）一起使用的改变原因方法，以实现可持续的生态风险。结果发现，在致密的微囊状habs（藻类密度为1.5×10（7）个/ ml），PAC剂量为30mg / L触发> 95％藻类去除，但释放的Al3 +引起了90％的浮游生物死亡率。麦格纳。将PAC剂量减少至15mg / L导致藻类去除效率略低（> 90％）。此外，减少的PAC剂量受益于剩余的单细胞藻类细胞的增殖，这在25天的实验中倾向于形成大殖民地。用15mg / L PAC的絮凝后孵育D. Magna有效地放映了剩余的藻类细胞，同时将D. Magna密度增加约40倍，并扩大体尺寸1.37-1.50倍。这结果暗示释放的Al3 +对D. Magna没有不利。用减少剂量的絮凝足以用于殖民和大藻类细胞缓解，这为残留的微小藻类的生物占ulipulation产生了窗口时间。因此，随后加入D. MAGNA引发了HABS细胞的可持续去除。本研究提供了一种环境友好的策略，用于清理绿色潮汐，没有对水生生态系统的明显不利影响。

著录项

  • 来源
    《Harmful Algae》 |2020年第11期|101917.1-101917.11|共11页
  • 作者

    Zhou Xin; He Yixin; Li Hong; Wei Yanyan; Zhao Lei; Yang Guofeng; Chen Xudong;

  • 作者单位

    Chongqing Univ Minist Educ Key Lab Ecoenvironm Three Gorges Reg Chongqing 400044 Peoples R China;

    Chongqing Univ Minist Educ Key Lab Ecoenvironm Three Gorges Reg Chongqing 400044 Peoples R China;

    Chongqing Univ Minist Educ Key Lab Ecoenvironm Three Gorges Reg Chongqing 400044 Peoples R China;

    Guangxi Univ Coll Agr Cultivat Base Guangxi Key Lab Agroenvironm & Agro Nanning 530004 Peoples R China;

    Third Bur China Construct Co Ltd Construct Engn Co Ltd 2 Wuhan Peoples R China;

    Chongqing Univ Minist Educ Key Lab Ecoenvironm Three Gorges Reg Chongqing 400044 Peoples R China;

    Chongqing Univ Minist Educ Key Lab Ecoenvironm Three Gorges Reg Chongqing 400044 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    HABs; Microcystis; Flocculation; Daphnia; Biomanipulation;

    机译：HABS;微囊囊;絮凝;浮游植;生物占卜;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号