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Remediation of cadmium-contaminated paddy soils by washing with calcium chloride: verification of on-site washing.
Environ Pollut. 2007 May; 147(1):112-9.EP

Abstract

We developed a new, three-step soil-wash method to remediate Cd-contaminated paddy fields. The method comprises (1) chemically washing the field soil with a CaCl2 solution; (2) washing the treated soil with water to eliminate residual Cd and CaCl2; and (3) on-site treatment of wastewater using a portable wastewater treatment system. Cd concentrations in the treated water were below Japan's environmental quality standard (0.01 mg Cd L-1), and the removal of Cd from the exchangeable fraction was 55% and from the acid-soluble fraction 15%. While soil fertility properties were affected by the soil washing, adverse effects were not crucial and could be corrected. The washing had no affect on rice growth, and reduced the average Cd concentration in rice grains by about two-thirds compared to a control plot. These results confirmed the effectiveness of the soil-wash method in remediating Cd-contaminated paddy fields.

Authors+Show Affiliations

National Institute for Agro-Environmental Sciences, 3-1-3, Kannondai, Tsukuba, Ibaraki 305-8604, Japan. michiai@affrc.go.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

17141928

Citation

Makino, Tomoyuki, et al. "Remediation of Cadmium-contaminated Paddy Soils By Washing With Calcium Chloride: Verification of On-site Washing." Environmental Pollution (Barking, Essex : 1987), vol. 147, no. 1, 2007, pp. 112-9.
Makino T, Kamiya T, Takano H, et al. Remediation of cadmium-contaminated paddy soils by washing with calcium chloride: verification of on-site washing. Environ Pollut. 2007;147(1):112-9.
Makino, T., Kamiya, T., Takano, H., Itou, T., Sekiya, N., Sasaki, K., Maejima, Y., & Sugahara, K. (2007). Remediation of cadmium-contaminated paddy soils by washing with calcium chloride: verification of on-site washing. Environmental Pollution (Barking, Essex : 1987), 147(1), 112-9.
Makino T, et al. Remediation of Cadmium-contaminated Paddy Soils By Washing With Calcium Chloride: Verification of On-site Washing. Environ Pollut. 2007;147(1):112-9. PubMed PMID: 17141928.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Remediation of cadmium-contaminated paddy soils by washing with calcium chloride: verification of on-site washing. AU - Makino,Tomoyuki, AU - Kamiya,Takashi, AU - Takano,Hiroyuki, AU - Itou,Tadashi, AU - Sekiya,Naoki, AU - Sasaki,Kouta, AU - Maejima,Yuji, AU - Sugahara,Kazuo, Y1 - 2006/12/04/ PY - 2006/04/03/received PY - 2006/08/15/revised PY - 2006/08/16/accepted PY - 2006/12/5/pubmed PY - 2007/6/29/medline PY - 2006/12/5/entrez SP - 112 EP - 9 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 147 IS - 1 N2 - We developed a new, three-step soil-wash method to remediate Cd-contaminated paddy fields. The method comprises (1) chemically washing the field soil with a CaCl2 solution; (2) washing the treated soil with water to eliminate residual Cd and CaCl2; and (3) on-site treatment of wastewater using a portable wastewater treatment system. Cd concentrations in the treated water were below Japan's environmental quality standard (0.01 mg Cd L-1), and the removal of Cd from the exchangeable fraction was 55% and from the acid-soluble fraction 15%. While soil fertility properties were affected by the soil washing, adverse effects were not crucial and could be corrected. The washing had no affect on rice growth, and reduced the average Cd concentration in rice grains by about two-thirds compared to a control plot. These results confirmed the effectiveness of the soil-wash method in remediating Cd-contaminated paddy fields. SN - 0269-7491 UR - https://www.unboundmedicine.com/medline/citation/17141928/Remediation_of_cadmium_contaminated_paddy_soils_by_washing_with_calcium_chloride:_verification_of_on_site_washing_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(06)00497-0 DB - PRIME DP - Unbound Medicine ER -