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The accumulation and release characteristics of heavy metals on the cultivation environment in Gracilaria litters during decay process.
Luo, Hongtian; Dai, Xiaojuan; Wang, Qing; Yang, Yufeng; Xie, Songguang.
Afiliación
  • Luo H; Institute of Hydrobiology, Key Laboratory of Philosophy and Social Science in Guangdong Province of Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Univers
  • Dai X; Institute of Hydrobiology, Key Laboratory of Philosophy and Social Science in Guangdong Province of Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China.
  • Wang Q; Institute of Hydrobiology, Key Laboratory of Philosophy and Social Science in Guangdong Province of Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China; Engineering Research Center for Tropical and Subtropical Aquatic Ecological Engineerin
  • Yang Y; Institute of Hydrobiology, Key Laboratory of Philosophy and Social Science in Guangdong Province of Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China; Engineering Research Center for Tropical and Subtropical Aquatic Ecological Engineerin
  • Xie S; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China. Electronic address: xiesg@hainanu.edu.cn.
Sci Total Environ ; 879: 163091, 2023 Jun 25.
Article en En | MEDLINE | ID: mdl-37001267
Gracilaria bioremediates heavy metals (Cd, Cr, Pb, Ni, Cu, Zn, Fe, and Mn) and improves water quality in mariculture zones. However, Gracilaria litter produced during the growth and harvest process has become a critical bottleneck problem that limits the sustainable development of the Gracilaria cultivation industry. Experiments of decaying dried (dead) and frozen fresh (falling and dying) G. lemaneiformis and G. lichenosdies were carried out using the litterbag technique under laboratory-controlled and in situ conditions. The results showed that decay rates (k), decomposed time in 50 % (t50) and in 95 % (t95) varied between dried and frozen fresh Gracilaria and were different between G. lemaneiformis and G. lichenosdies. All Gracilaria samples showed an 80 %-90 % weight loss in 15-45 d. The variation in MAIs (accumulation index of metals) between the dried and frozen fresh Gracilaria litters differed significantly and provided evidence that metals could be imported or exported from litter to the environment. Based on our estimates from the 15-45 d experiment, the decay of Gracilaria can release and adsorb heavy metals. The enrichment of Fe, Pb, and Mn was more significant than the release, but the release of Cr, Zn, Cd, Pb, Cu, and Ni was more significant than the enrichment. Heavy metals in Gracilaria litters were accumulated and released simultaneously during decay. The present study simulated and underscores that Gracilaria cultivation intensely influences heavy metals recycled in marine environments It provides a theoretical basis for seaweed management for the sustainable development of the seaweed industry in the mariculture zone.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Metales Pesados / Gracilaria Idioma: En Revista: Sci Total Environ Año: 2023 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Metales Pesados / Gracilaria Idioma: En Revista: Sci Total Environ Año: 2023 Tipo del documento: Article Pais de publicación: Países Bajos