施用不同改良剂对 Cd、Pb 和 As 复合污染稻田土壤的修复。
Remediation of Cd, Pb and as Co-contaminated Paddy Soil by Applying Different Amendments.
机构信息
School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, People's Republic of China.
Environmental Protection Research Institute of Guangxi, Nanning, 530022, People's Republic of China.
出版信息
Bull Environ Contam Toxicol. 2020 Aug;105(2):283-290. doi: 10.1007/s00128-020-02940-8. Epub 2020 Jul 30.
The current study investigated the efficiency of sepiolite (SE), sodium humate (HS), microbial fertilizer (JF) and SE combined with JF/HS in a ratio of 2:1 (w/w) (JF-2SE and HS-2SE) on Cd, Pb and As bioavailability in field trials with rice (Oryza sativa L.). The results showed that all the amendments remarkably decreased (p < 0.05) the contents of available Cd and available Pb in soil. Only JF-2SE treatment reduced available As concentration in soil. All the amendments were found to effectively reduce (p < 0.05) the contents of As in brown rice. Both JF-2SE and HS-2SE co-applications reduced the concentrations of Cd in brown rice to 0.108 and 0.135 mg kg, and that of Pb reduced to 0.2 and 0.175 mg kg, which met the national standard limit of China. Thus, the co-application of JF/HS-2SE can be a promising remediation strategy in Cd, Pb and As co-contaminated paddy soil.
本研究采用田间试验，调查了海泡石（SE）、腐植酸钠（HS）、微生物肥料（JF）以及 SE 与 JF/HS 以 2:1（w/w）比例复配（JF-2SE 和 HS-2SE）对水稻（Oryza sativa L.）中 Cd、Pb 和 As 生物有效性的影响。结果表明，所有改良剂均显著降低了土壤中有效态 Cd 和有效态 Pb 的含量（p<0.05）。只有 JF-2SE 处理降低了土壤中有效态 As 的浓度。所有改良剂均有效地降低了糙米中 As 的含量（p<0.05）。JF-2SE 和 HS-2SE 共同施用将糙米中 Cd 的浓度降低至 0.108 和 0.135mg/kg，Pb 的浓度降低至 0.2 和 0.175mg/kg，均符合中国国家标准限量。因此，JF/HS-2SE 的共施用作 为一种有前景的修复策略，可用于同时修复 Cd、Pb 和 As 复合污染的稻田。
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