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首页> 外文期刊>Environmental Science & Technology >Simultaneous Removal of Harmful Algal Blooms and Microcystins Using Microorganism- and Chitosan-Modified Local Soil
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Simultaneous Removal of Harmful Algal Blooms and Microcystins Using Microorganism- and Chitosan-Modified Local Soil

机译：使用微生物和壳聚糖改性的本地土壤同时去除有害藻华和微囊藻毒素

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摘要

Cyanobacterial harmful algal blooms (cyano-HAB) and microcystins (MCs) can cause a potential threat to public health. Here, a method for simultaneous removal of cyano-HAB and MCs was developed using chitosan-modified local soil (MLS) flocculation plus microorganism-modified soil capping. The experiment was conducted in simulated columns containing algal water collected from Lake Taihu (China). More than 90% of algal cells and intracellular MCs were flocculated and removed from water using chitosan-MLS and the sunken floes were treated by different capping materials including Pseudomonas sp. An l8 modified local soil. During 40 days of incubation, dissolved MC-LR and MC-RR showed 10-fold increase in the flocculation-only system. The increase of MC-LR and MC-RR in water was reduced by 30 and 7096 in soil capping treatments; however, the total content of MCs in the sediment-water column remained similar to that in the control and flocculation only systems. In contrast, both dissolved MCs and total MCs were reduced by 90% in Pseudomonas sp. An 18 modified soil capping treatment. The high performance of toxin decomposition was due to the combined effects of flocculation and MC-degrading bacteria that embedded in the capping material, which prevents dilution of bacteria biomass, concentrates algal cells, confines released toxins, and enhances toxin biodegradation.
机译：蓝藻有害藻华（cyano-HAB）和微囊藻毒素（MCs）可能对公共健康造成潜在威胁。在这里，开发了一种同时去除氰基-HAB和MC的方法，方法是使用壳聚糖改性的局部土壤（MLS）絮凝加微生物改性的土壤覆盖。该实验是在包含从太湖（中国）收集的藻类水的模拟柱中进行的。使用壳聚糖-MLS将超过90％的藻类细胞和细胞内MC絮凝并从水中去除，并用包括假单胞菌（Pseudomonas sp。） 18改良的当地土壤。在孵育的40天中，仅絮凝系统的溶解MC-LR和MC-RR显示增加了10倍。在土壤封盖处理中，水中MC-LR和MC-RR的增加分别减少了30和7096。然而，沉积物-水塔中MC的总含量仍然与仅控制和絮凝系统中的MC相似。相比之下，假单胞菌sp中溶解的MC和总MC均降低了90％。 18种改良的土壤覆盖处理。毒素分解的高性能归因于絮凝和MC降解细菌的综合作用，这些细菌嵌入在封盖材料中，可防止细菌生物质稀释，浓缩藻类细胞，限制释放的毒素并增强毒素的生物降解能力。

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  • 来源
    《Environmental Science & Technology》 |2015年第10期|6249-6256|共8页
  • 作者

    Hong Li; Gang Pan;

  • 作者单位

    Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China,Institute of Biology, Guizhou Academy of Science, Guiyang 550009, China;

    Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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