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A three-year in-situ study on the persistence of a combined amendment (limestone+sepiolite) for remedying paddy soil polluted with heavy metals.
Ecotoxicol Environ Saf. 2016 Aug; 130:163-70.EE

Abstract

In order to study the persistence of a combined amendment (LS, limestone+sepiolite) for remedying paddy soil polluted with the heavy metals Pb and Cd, a three-year in-situ experiment was conducted in a paddy soil near a mining area in southern Hunan, China. LS was applied at rates of 0, 2, 4, and 8g/kg (w/w); rice was subsequently planted for the three consecutive years of 2012 (first season), 2013 (second season), and 2014 (third season). Experimental results indicated that LS significantly increased soil pH values for all three seasons, and the enhancement ranked as follows: first season>second season>third season. Under the experimental conditions, the effect of LS on decreasing exchangeable concentrations of soil Pb and Cd was as follows: first season (97.6-99.8% for Pb and 88.3-98.9% for Cd)>second season (80.7-97.7% for Pb and 28.3-88.0% for Cd)>third season (32.6-97.7% for Pb and 8.3-71.4% for Cd); the effect of LS on reducing Pb concentrations in brown rice was: first season (73.5-81.2%)>third season (29.6-68.1%)>second season (0-9.7%), and that for reducing Cd concentrations in brown rice was third season (72.7-81.0%)>first season (56.1-66.8%)>second season (20.9-32.3%). For all three seasons, the effect of LS on reducing Cd content in brown rice was better than that for Pb. The highest translocation factors for Pb and Cd were from rice straw to husk, implying that the husk of rice plants was the main organ in which heavy metals accumulated. The effect of LS for decreasing soil exchangeable Cd content was relatively persistent, but that for Pb gradually decreased with time, implying that LS was more suitable for the long-term remediation of Cd-polluted soil than Pb-polluted soil.

Authors+Show Affiliations

College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China. Electronic address: liaobh1020@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27107177

Citation

Wu, Yu-Jun, et al. "A Three-year In-situ Study On the Persistence of a Combined Amendment (limestone+sepiolite) for Remedying Paddy Soil Polluted With Heavy Metals." Ecotoxicology and Environmental Safety, vol. 130, 2016, pp. 163-70.
Wu YJ, Zhou H, Zou ZJ, et al. A three-year in-situ study on the persistence of a combined amendment (limestone+sepiolite) for remedying paddy soil polluted with heavy metals. Ecotoxicol Environ Saf. 2016;130:163-70.
Wu, Y. J., Zhou, H., Zou, Z. J., Zhu, W., Yang, W. T., Peng, P. Q., Zeng, M., & Liao, B. H. (2016). A three-year in-situ study on the persistence of a combined amendment (limestone+sepiolite) for remedying paddy soil polluted with heavy metals. Ecotoxicology and Environmental Safety, 130, 163-70. https://doi.org/10.1016/j.ecoenv.2016.04.018
Wu YJ, et al. A Three-year In-situ Study On the Persistence of a Combined Amendment (limestone+sepiolite) for Remedying Paddy Soil Polluted With Heavy Metals. Ecotoxicol Environ Saf. 2016;130:163-70. PubMed PMID: 27107177.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A three-year in-situ study on the persistence of a combined amendment (limestone+sepiolite) for remedying paddy soil polluted with heavy metals. AU - Wu,Yu-Jun, AU - Zhou,Hang, AU - Zou,Zi-Jin, AU - Zhu,Wei, AU - Yang,Wen-Tao, AU - Peng,Pei-Qin, AU - Zeng,Min, AU - Liao,Bo-Han, Y1 - 2016/04/22/ PY - 2015/10/19/received PY - 2016/04/11/revised PY - 2016/04/13/accepted PY - 2016/4/24/entrez PY - 2016/4/24/pubmed PY - 2017/3/7/medline KW - Combined amendment KW - Paddy soil KW - Pb and Cd KW - Remediation persistence KW - Rice SP - 163 EP - 70 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 130 N2 - In order to study the persistence of a combined amendment (LS, limestone+sepiolite) for remedying paddy soil polluted with the heavy metals Pb and Cd, a three-year in-situ experiment was conducted in a paddy soil near a mining area in southern Hunan, China. LS was applied at rates of 0, 2, 4, and 8g/kg (w/w); rice was subsequently planted for the three consecutive years of 2012 (first season), 2013 (second season), and 2014 (third season). Experimental results indicated that LS significantly increased soil pH values for all three seasons, and the enhancement ranked as follows: first season>second season>third season. Under the experimental conditions, the effect of LS on decreasing exchangeable concentrations of soil Pb and Cd was as follows: first season (97.6-99.8% for Pb and 88.3-98.9% for Cd)>second season (80.7-97.7% for Pb and 28.3-88.0% for Cd)>third season (32.6-97.7% for Pb and 8.3-71.4% for Cd); the effect of LS on reducing Pb concentrations in brown rice was: first season (73.5-81.2%)>third season (29.6-68.1%)>second season (0-9.7%), and that for reducing Cd concentrations in brown rice was third season (72.7-81.0%)>first season (56.1-66.8%)>second season (20.9-32.3%). For all three seasons, the effect of LS on reducing Cd content in brown rice was better than that for Pb. The highest translocation factors for Pb and Cd were from rice straw to husk, implying that the husk of rice plants was the main organ in which heavy metals accumulated. The effect of LS for decreasing soil exchangeable Cd content was relatively persistent, but that for Pb gradually decreased with time, implying that LS was more suitable for the long-term remediation of Cd-polluted soil than Pb-polluted soil. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/27107177/A_three_year_in_situ_study_on_the_persistence_of_a_combined_amendment__limestone+sepiolite__for_remedying_paddy_soil_polluted_with_heavy_metals_ DB - PRIME DP - Unbound Medicine ER -