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The effects of biochars from rice residue on the formation of iron plaque and the accumulation of Cd, Zn, Pb, As in rice (Oryza sativa L.) seedlings.
Chemosphere. 2012 Oct; 89(7):856-62.C

Abstract

A historically multi-metal contaminated soil was amended with biochars produced from different parts of rice plants (straw, husk and bran) to investigate how biochar can influence the mobility of Cd, Zn, Pb and As in rice seedlings (Oryza sativa L.). Rice shoot concentrations of Cd, Zn and Pb decreased by up to 98%, 83% and 72%, respectively, due to biochar amendment, though that of As increased by up to 327%. Biochar amendments significantly decreased pore water concentrations (C(pw)) of Cd and Zn and increased that of As. For Pb it depended on the amendment. Porewater pH, dissolved organic carbon, dissolved phosphorus, silicon in pore water and iron plaque formation on root surfaces all increased significantly after the amendments. The proportions of Cd and Pb in iron plaque increased by factors 1.8-5.7 and 1.4-2.8, respectively; no increase was observed for As and Zn. Straw-char application significantly and noticeably decreased the plant transfer coefficients of Cd and Pb. This study, the first to investigate changes in metal mobility and iron plaque formation in rice plants due to amending a historically contaminated soil with biochar, indicates that biochar has a potential to decrease Cd, Zn and Pb accumulations in rice shoot but increase that of As. The main cause is likely biochar decreasing the C(pw) of Cd and Zn, increasing the C(pw) of As, and increasing the iron plaque blocking capacity for Cd and Pb.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Zheng RL
State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
Cai C
No affiliation info available
Liang JH
No affiliation info available
Huang Q
No affiliation info available
Chen Z
No affiliation info available
Huang YZ
No affiliation info available
Arp HP
No affiliation info available
Sun GX
No affiliation info available

MeSH

ArsenicCadmiumCharcoalHydrogen-Ion ConcentrationIronLeadMetals, HeavyOryzaPlant RootsSeedlingsSoil PollutantsZinc

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22664390

Citation

Zheng, Rui-Lun, et al. "The Effects of Biochars From Rice Residue On the Formation of Iron Plaque and the Accumulation of Cd, Zn, Pb, as in Rice (Oryza Sativa L.) Seedlings." Chemosphere, vol. 89, no. 7, 2012, pp. 856-62.
Zheng RL, Cai C, Liang JH, et al. The effects of biochars from rice residue on the formation of iron plaque and the accumulation of Cd, Zn, Pb, As in rice (Oryza sativa L.) seedlings. Chemosphere. 2012;89(7):856-62.
Zheng, R. L., Cai, C., Liang, J. H., Huang, Q., Chen, Z., Huang, Y. Z., Arp, H. P., & Sun, G. X. (2012). The effects of biochars from rice residue on the formation of iron plaque and the accumulation of Cd, Zn, Pb, As in rice (Oryza sativa L.) seedlings. Chemosphere, 89(7), 856-62. https://doi.org/10.1016/j.chemosphere.2012.05.008
Zheng RL, et al. The Effects of Biochars From Rice Residue On the Formation of Iron Plaque and the Accumulation of Cd, Zn, Pb, as in Rice (Oryza Sativa L.) Seedlings. Chemosphere. 2012;89(7):856-62. PubMed PMID: 22664390.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effects of biochars from rice residue on the formation of iron plaque and the accumulation of Cd, Zn, Pb, As in rice (Oryza sativa L.) seedlings. AU - Zheng,Rui-Lun, AU - Cai,Chao, AU - Liang,Jian-Hong, AU - Huang,Qing, AU - Chen,Zheng, AU - Huang,Yi-Zong, AU - Arp,Hans Peter H, AU - Sun,Guo-Xin, Y1 - 2012/06/02/ PY - 2012/01/17/received PY - 2012/05/07/revised PY - 2012/05/07/accepted PY - 2012/6/6/entrez PY - 2012/6/6/pubmed PY - 2012/12/15/medline SP - 856 EP - 62 JF - Chemosphere JO - Chemosphere VL - 89 IS - 7 N2 - A historically multi-metal contaminated soil was amended with biochars produced from different parts of rice plants (straw, husk and bran) to investigate how biochar can influence the mobility of Cd, Zn, Pb and As in rice seedlings (Oryza sativa L.). Rice shoot concentrations of Cd, Zn and Pb decreased by up to 98%, 83% and 72%, respectively, due to biochar amendment, though that of As increased by up to 327%. Biochar amendments significantly decreased pore water concentrations (C(pw)) of Cd and Zn and increased that of As. For Pb it depended on the amendment. Porewater pH, dissolved organic carbon, dissolved phosphorus, silicon in pore water and iron plaque formation on root surfaces all increased significantly after the amendments. The proportions of Cd and Pb in iron plaque increased by factors 1.8-5.7 and 1.4-2.8, respectively; no increase was observed for As and Zn. Straw-char application significantly and noticeably decreased the plant transfer coefficients of Cd and Pb. This study, the first to investigate changes in metal mobility and iron plaque formation in rice plants due to amending a historically contaminated soil with biochar, indicates that biochar has a potential to decrease Cd, Zn and Pb accumulations in rice shoot but increase that of As. The main cause is likely biochar decreasing the C(pw) of Cd and Zn, increasing the C(pw) of As, and increasing the iron plaque blocking capacity for Cd and Pb. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/22664390/The_effects_of_biochars_from_rice_residue_on_the_formation_of_iron_plaque_and_the_accumulation_of_Cd_Zn_Pb_As_in_rice__Oryza_sativa_L___seedlings_ DB - PRIME DP - Unbound Medicine ER -