Scholarlink

Purpose <p>Due to its persistence, Chlordecone (CLD) contamination in the French West Indies volcanic soils presents a critical environmental and health issue. Soil amendments with carbonaceous matrices are expected to reduce CLD environmental availability by adsorption, thereby limiting its transfer to water, plants and organisms.</p> Materials and methods <p>This study investigates the CLD sequestrating potential of two carbonaceous materials—commercial activated carbon DARCO<sup>®</sup> and Sargassum biochar— under in vitro or natural in situ controlled conditions. In vitro and in situ experiments were conducted on a contaminated nitisol, with amendments applied at 2% (w/w). plotplotplotplot. The environmental availability of chlordecone (Cf. 2.5) prior to amendment was determined in each in situ and in vitro samples.</p> Results and discussion <p>The activated carbon DARCO<sup>®</sup> amendment resulted in higher sequestration performance, reducing CLD environmental availability by over 90% in both in situ and in vitro conditions at 90 d post-amendment. This efficacy can be attributed to its high porosity (total pore volume = 0.73&#xa0;cm³.g<sup>-1</sup>) and specific surface area (total pore surface = 878&#xa0;m².g<sup>-1</sup>). Sargassum biochar amendment also resulted in significant CLD sequestration, achieving approximately 43% reduction under in situ conditions and 32% when in vitro conditions were applied. This lower sequestration with Sargassum biochar can be explained by its lower porosity (total pore volume = 0.29&#xa0;cm³.g<sup>-1</sup>) and surface area (total pore surface = 416&#xa0;m².g<sup>-1</sup>) when compared to activated carbon DARCO. This study also revealed that comparable sequestration performances were obtained under both in vitro and in situ conditions, despite natural conditions.</p> Conclusion <p>Overall, these findings indicate the potential of carbonaceous matrices, particularly activated carbon DARCO<sup>®</sup>, for in situ CLD sequestration in contaminated soils. Further research should focus on optimizing biochar production and addressing logistical and economic barriers before large-scale implementation.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

In situ and in vitro evaluation of a technique for sequestering chlordecone in contaminated nitisol using activated carbon and Sargassum biochar

  • 期刊论文

  • 发表日期：

    2026年3月17日

查看全文
  • Marie Bertrand,
  • Matthieu Delannoy,
  • Maguy Dulormne,
  • Gaelle Gruel,
  • Claire Soligot,
  • Sarra Gaspard,
  • Waking-Balaguer Mainviel,
  • Agnès Fournier,
  • Guido Rychen

摘要

Purpose

Due to its persistence, Chlordecone (CLD) contamination in the French West Indies volcanic soils presents a critical environmental and health issue. Soil amendments with carbonaceous matrices are expected to reduce CLD environmental availability by adsorption, thereby limiting its transfer to water, plants and organisms.

Materials and methods

This study investigates the CLD sequestrating potential of two carbonaceous materials—commercial activated carbon DARCO® and Sargassum biochar— under in vitro or natural in situ controlled conditions. In vitro and in situ experiments were conducted on a contaminated nitisol, with amendments applied at 2% (w/w). plotplotplotplot. The environmental availability of chlordecone (Cf. 2.5) prior to amendment was determined in each in situ and in vitro samples.

Results and discussion

The activated carbon DARCO® amendment resulted in higher sequestration performance, reducing CLD environmental availability by over 90% in both in situ and in vitro conditions at 90 d post-amendment. This efficacy can be attributed to its high porosity (total pore volume = 0.73 cm³.g-1) and specific surface area (total pore surface = 878 m².g-1). Sargassum biochar amendment also resulted in significant CLD sequestration, achieving approximately 43% reduction under in situ conditions and 32% when in vitro conditions were applied. This lower sequestration with Sargassum biochar can be explained by its lower porosity (total pore volume = 0.29 cm³.g-1) and surface area (total pore surface = 416 m².g-1) when compared to activated carbon DARCO. This study also revealed that comparable sequestration performances were obtained under both in vitro and in situ conditions, despite natural conditions.

Conclusion

Overall, these findings indicate the potential of carbonaceous matrices, particularly activated carbon DARCO®, for in situ CLD sequestration in contaminated soils. Further research should focus on optimizing biochar production and addressing logistical and economic barriers before large-scale implementation.

Graphical Abstract