Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, MARA, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China.
Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs (MARA), Agro-Environmental Protection Institute, MARA, Tianjin 300191, China; Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, MARA, Tianjin 300191, China.
Ecotoxicol Environ Saf. 2021 Jan 15;208:111600. doi: 10.1016/j.ecoenv.2020.111600. Epub 2020 Nov 13.
Field experiments was conducted to evaluate the effectiveness of sepiolite (S), sepiolite + fungi residues (SFR) and sepiolite + vermicompost (SVC) on in situ immobilization remediation of Cd contaminated soils. The results showed that treatments of S, SFR and SVC decreased soil Cd availability by 15.2-47.8%, 17.5-44.9% and 13.2-44.9%, respectively, when compared with the control groups. Moreover, the content of Cd in edible parts of Lactuca sativa L., Cichorium endivia L. and Brassica campestris L. was experienced a decrease of 15.9-41.9%, 1.6-38.0% and 29.0-37.4% reduction, respectively, under the amended soil. The improvement of soil fertility was obtained under addition of SVC and SFR, while the amounts of available P, K, organic matter, microbial carbon, microbial nitrogen and dehydrogenase activity were increased by 9.6-68.2%, 1.2-28.3%, 37.5-70.5%, 4.1-121.0%, 220-640% and 6.8-56.8%, respectively, in contrast to CK. Moreover, high-throughput sequencing analysis showed that the combined treated soils got higher values of alpha diversity indices, Chao1, ACE and Shannon. The number of dominant phyla (Proteobacteria, Acidobacteria, Gemmatimonadetes, Crenarchaeota) and genera (Aquicella, Lysobacter, Candidatus Nitrososphaera, Sphingopyxis, Mesorhizobium) were enhanced. Therefore, the use of sepiolite and organic amendments could be an adequate strategy to immobilization remediation of Cd-contaminated soils.
采用田间试验研究了海泡石（S）、海泡石+真菌残渣（SFR）和海泡石+蚯蚓粪（SVC）对原位固定化修复 Cd 污染土壤的效果。结果表明，与对照组相比，S、SFR 和 SVC 处理分别降低了土壤 Cd 有效性 15.2-47.8%、17.5-44.9%和 13.2-44.9%。此外，生菜（Lactuca sativa L.）、菊苣（Cichorium endivia L.）和油菜（Brassica campestris L.）可食部分的 Cd 含量分别降低了 15.9-41.9%、1.6-38.0%和 29.0-37.4%。添加 SVC 和 SFR 可提高土壤肥力，而有效磷、钾、有机质、微生物碳、微生物氮和脱氢酶活性分别增加了 9.6-68.2%、1.2-28.3%、37.5-70.5%、4.1-121.0%、220-640%和 6.8-56.8%。此外，高通量测序分析表明，联合处理土壤的 alpha 多样性指数、Chao1、ACE 和 Shannon 值较高。优势菌群（变形菌门、酸杆菌门、芽单胞菌门、古菌门）和属（Aquicella、Lysobacter、Candidatus Nitrososphaera、Sphingopyxis、Mesorhizobium）的数量增加。因此，海泡石和有机改良剂的使用可能是一种有效的 Cd 污染土壤原位固定化修复策略。
