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Enhanced uptake of As, Zn, and Cu by Vetiveria zizanioides and Zea mays using chelating agents.
Chemosphere. 2005 Sep; 60(10):1365-75.C

Abstract

Vetiveria zizaniodes (vetiver) is commonly known for its effectiveness in soil and sediment erosion control. It can tolerate to extreme soil conditions and produce a high biomass even growing in contaminated areas. Zea mays (maize) can also produce a very high biomass with a fast growth rate and possesses some degree of metal tolerance. A greenhouse study was conducted to investigate the feasibility of using vetiver and maize for remediation of arsenic (As)-, zinc (Zn-), and copper (Cu)-amended soils and evaluate the effects of chelating agents on metal uptake by these plants. Vetiver had a better growth (dry weight yield of root and shoot) than maize under different treatment conditions. The effects of different chelating agents on As, Zn, and Cu extraction from soil to soil solution were studied. Among the nine chelating agents used, it was noted that 20 mmol NTA could maximize As and Zn bioavailability, while 20 mmol HEIDA could maximize Cu bioavailability in the soil solution. The surge time in maximizing metal uptake ranged from 16 to 20 days which indicated that timing on plant harvest was an important factor in enhanced metal accumulation. In general, vetiver was a more suitable plant species than maize in terms of phytoextraction of metals from metal-contaminated soil. Application of NTA in As-amended soil and HEIDA in Cu-amended soil at the rate of 20 mmol kg(-1) increased 3-4-fold of As and Cu in shoot of both plants, whereas application of NTA (20 mmol kg(-1)) increased 37- and 1.5-fold of Zn accumulation in shoot of vetiver and maize, respectively. The potential environmental risk of metal mobility caused by chelating agents used for phytoextraction should not be overlooked.

Authors+Show Affiliations

Croucher Institute for Environmental Sciences and Department of Biology, Hong Kong Baptist University, Hong Kong SAR, PR China.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

16054905

Citation

Chiu, K K., et al. "Enhanced Uptake of As, Zn, and Cu By Vetiveria Zizanioides and Zea Mays Using Chelating Agents." Chemosphere, vol. 60, no. 10, 2005, pp. 1365-75.
Chiu KK, Ye ZH, Wong MH. Enhanced uptake of As, Zn, and Cu by Vetiveria zizanioides and Zea mays using chelating agents. Chemosphere. 2005;60(10):1365-75.
Chiu, K. K., Ye, Z. H., & Wong, M. H. (2005). Enhanced uptake of As, Zn, and Cu by Vetiveria zizanioides and Zea mays using chelating agents. Chemosphere, 60(10), 1365-75.
Chiu KK, Ye ZH, Wong MH. Enhanced Uptake of As, Zn, and Cu By Vetiveria Zizanioides and Zea Mays Using Chelating Agents. Chemosphere. 2005;60(10):1365-75. PubMed PMID: 16054905.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced uptake of As, Zn, and Cu by Vetiveria zizanioides and Zea mays using chelating agents. AU - Chiu,K K, AU - Ye,Z H, AU - Wong,M H, Y1 - 2005/04/07/ PY - 2004/06/28/received PY - 2005/01/22/revised PY - 2005/02/09/accepted PY - 2005/8/2/pubmed PY - 2005/11/4/medline PY - 2005/8/2/entrez SP - 1365 EP - 75 JF - Chemosphere JO - Chemosphere VL - 60 IS - 10 N2 - Vetiveria zizaniodes (vetiver) is commonly known for its effectiveness in soil and sediment erosion control. It can tolerate to extreme soil conditions and produce a high biomass even growing in contaminated areas. Zea mays (maize) can also produce a very high biomass with a fast growth rate and possesses some degree of metal tolerance. A greenhouse study was conducted to investigate the feasibility of using vetiver and maize for remediation of arsenic (As)-, zinc (Zn-), and copper (Cu)-amended soils and evaluate the effects of chelating agents on metal uptake by these plants. Vetiver had a better growth (dry weight yield of root and shoot) than maize under different treatment conditions. The effects of different chelating agents on As, Zn, and Cu extraction from soil to soil solution were studied. Among the nine chelating agents used, it was noted that 20 mmol NTA could maximize As and Zn bioavailability, while 20 mmol HEIDA could maximize Cu bioavailability in the soil solution. The surge time in maximizing metal uptake ranged from 16 to 20 days which indicated that timing on plant harvest was an important factor in enhanced metal accumulation. In general, vetiver was a more suitable plant species than maize in terms of phytoextraction of metals from metal-contaminated soil. Application of NTA in As-amended soil and HEIDA in Cu-amended soil at the rate of 20 mmol kg(-1) increased 3-4-fold of As and Cu in shoot of both plants, whereas application of NTA (20 mmol kg(-1)) increased 37- and 1.5-fold of Zn accumulation in shoot of vetiver and maize, respectively. The potential environmental risk of metal mobility caused by chelating agents used for phytoextraction should not be overlooked. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/16054905/Enhanced_uptake_of_As_Zn_and_Cu_by_Vetiveria_zizanioides_and_Zea_mays_using_chelating_agents_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(05)00273-0 DB - PRIME DP - Unbound Medicine ER -