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首页> 外文期刊>Journal of Environmental Science and Health >Toxicity assessment of untreated/treated electroplating sludge using human and plant bioassay
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Toxicity assessment of untreated/treated electroplating sludge using human and plant bioassay

机译：使用人和植物生物测定法评估未经处理/处理过的电镀污泥的毒性

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摘要

The purpose of this work was to assess the risk to the environment arising from the electroplating sludge from both chemical and toxicological point of view. Both approaches were used for the assessment of the treatment efficiency which consisted of CaO based solidification followed by thermal treatment at 400 degrees C. The elemental composition was determined in the bulk samples and the leachates of untreated sludge. The toxicity of the leachate was determined using two human colorectal adenocarcinoma cell lines (Caco-2 and SW 480) and Hordeum vulgare L. based plant bioassay. The same toxicity tests were employed to the leachate of the treated sludge. Untreated sludge showed extremely high cytotoxic effect to both human and plant bio-system in dose-dependent manner. The percentages higher than 0.5% and 0.05% of the leachate caused significant cytotoxic effect on Caco-2 and SW 480 cells, respectively. The percentages of the leachate higher than 0.05% also showed significant toxic effect to H. vulgare L. bio-system with complete arrest of seed germination following the treatment with 100% to 5% of the leachate. The leachate of the treated sludge showed no toxicity to any of the test systems confirming the efficiency and justification of the employed procedures for the detoxification of electroplating sludge.
机译：这项工作的目的是从化学和毒理学的角度评估电镀污泥对环境造成的风险。两种方法都用于评估处理效率，该方法包括基于CaO的固化，然后在400摄氏度下进行热处理。在未处理污泥的散装样品和渗滤液中确定了元素组成。使用两种人结肠直肠腺癌细胞系（Caco-2和SW 480）和基于大麦的植物生物测定法测定渗滤液的毒性。对处理后的污泥的渗滤液进行相同的毒性测试。未经处理的污泥以剂量依赖性方式对人类和植物生物系统均具有极高的细胞毒性作用。高于渗滤液的0.5％和0.05％的百分数分别对Caco-2和SW 480细胞产生了明显的细胞毒性作用。浸出液的百分比高于0.05％，也显示出对H. vulgare L.生物系统的显着毒性作用，用100％至5％的浸出液处理后，种子发芽被完全阻止。处理过的污泥的浸出液对任何测试系统均无毒性，这证实了所采用的电镀污泥脱毒程序的效率和合理性。

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