• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Reduction of Cd accumulation in pak choi (Brassica chinensis?L.) in consecutive growing seasons using mercapto-grafted palygorskite
【24h】

Reduction of Cd accumulation in pak choi (Brassica chinensis?L.) in consecutive growing seasons using mercapto-grafted palygorskite

机译：巯基嫁接坡缕石连续生长季节减少白菜中镉的积累

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cd contamination in agricultural fields poses a potential human health risk via food chain exposure. Proper remediation methods are critical to ensure the adequate safety of agricultural food products. In the current study, mercapto-grafted palygorskite (MP), a novel immobilization agent, was selected for the remediation of Cd-contaminated acid soils in pot experiments. Pak choi was used as the model plant. MP significantly reduced Cd accumulation in the shoots and roots of pak choi grown in Xiangtan and Guiyang soils in comparison to the control, in consecutive growing seasons, and the minimum Cd contents in shoots were less than the maximum permitted level proposed by the Codex Alimentarius Commission of FAO and WHO. Further, MP decreased the phytoavailable Cd content in soils determined using the diffusive gradient technique in thin-films in consecutive growing seasons with the maximum reductions of 86.26% and 89.51% respectively. These findings indicated that MP had a remarkable Cd immobilization efficiency in soils. MP had no obvious promotion impact on the pH value of either soil sample, but decreased the zeta potentials of both soil samples significantly, and then resulted in increases of the maximum sorption amounts of Cd of both soil samples. The results indicated MP could achieve remediation of Cd-contaminated soil by enhancing the sorption of Cd contaminants and the chemical sorption of Cd ~(2+) . The available sulfur content in both soils increased and soil enzyme activities, such as that of urease, were enhanced, thereby alleviating Cd-induced oxidation. These improvements of the index of soil environmental and biological qualities indicated that MP was environmentally friendly and compatible. The high performance of MP even at a small dosage suggested that when scaled up to agricultural operations over a large-area, MP had great potential to reduce Cd accumulation in vegetables, thereby ensuring the food safety of vegetables.
机译：农业领域中的镉污染通过食物链暴露对人类健康构成潜在风险。正确的补救方法对于确保农产品的足够安全至关重要。在当前的研究中，在盆栽实验中，选择了巯基接枝坡缕石（MP）（一种新型的固定剂）来修复Cd污染的酸性土壤。白菜被用作模型植物。与对照相比，MP在连续生长的季节中显着降低了湘潭和贵阳土壤中小白菜的芽和根中的Cd积累，并且芽中的最小Cd含量低于食品法典委员会建议的最大允许水平。粮农组织和世界卫生组织。此外，在连续的生长季节中，MP减少了使用扩散梯度技术在薄膜中测定的土壤中植物有效Cd含量，最大减少量分别为86.26％和89.51％。这些发现表明MP在土壤中具有显着的镉固定效率。 MP对两种土壤样品的pH值均没有明显的促进作用，但显着降低了两种土壤样品的Zeta电位，从而导致两种土壤样品中Cd的最大吸附量增加。结果表明，MP可以通过提高Cd污染物的吸附和Cd〜（2+）的化学吸附来实现对Cd污染土壤的修复。两种土壤中的有效硫含量均增加，土壤酶活性（如脲酶）增加，从而减轻了Cd诱导的氧化。土壤环境和生物质量指数的这些改进表明，MP具有环保性和相容性。 MP即使在小剂量下仍具有较高的性能，这表明，MP在大面积推广到农业生产时，具有减少蔬菜中Cd积累的巨大潜力，从而确保了蔬菜的食品安全。

著录项

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