Analysis of Ammonia Toxicity in Landfill Leachates

Takuya Osada, Keisuke Nemoto, Hiroki Nakanishi, Ayumi Hatano, Ryo Shoji, Tomohiro Naruoka, Masato Yamada

doi:10.5402/2011/954626

Analysis of Ammonia Toxicity in Landfill Leachates

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Takuya Osada

Department of Chemical Science and Engineering, Tokyo National College of Technology, 1220-2 Kunugida-Machi, Hachioji, Tokyo 193-0997, Japan
Keisuke Nemoto

Department of Chemical Science and Engineering, Tokyo National College of Technology, 1220-2 Kunugida-Machi, Hachioji, Tokyo 193-0997, Japan
Hiroki Nakanishi

Department of Chemical Science and Engineering, Tokyo National College of Technology, 1220-2 Kunugida-Machi, Hachioji, Tokyo 193-0997, Japan
Ayumi Hatano

Department of Chemical Science and Engineering, Tokyo National College of Technology, 1220-2 Kunugida-Machi, Hachioji, Tokyo 193-0997, Japan
Ryo Shoji

Department of Chemical Science and Engineering, Tokyo National College of Technology, 1220-2 Kunugida-Machi, Hachioji, Tokyo 193-0997, Japan
Tomohiro Naruoka

Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan
Masato Yamada

Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan

書誌事項

公開日: 2011-09-28

権利情報

http://creativecommons.org/licenses/by/3.0/

DOI

10.5402/2011/954626

公開者: Wiley

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説明

<jats:p>Toxicity identification evaluation (TIE) phase I manipulations and toxicity test with<jats:italic>D. magna</jats:italic>were conducted on leachates from an industrial waste landfill site in Japan. Physicochemical analysis detected heavy metals at concentrations insufficient to account for the observed acute toxicity. The graduated pH and aeration manipulations identified the prominent toxicity of ammonia. Based on joint toxicity with additive effects of unionized ammonia and ammonium ions, the unionized ammonia toxicity () was calculated as 3.3 ppm, and the toxicity of ammonium ions () was calculated as 222 ppm. Then, the contribution of ammonia toxicity in the landfill leachate toxicity was calculated as 58.7 vol% of the total toxicity in the landfill leachate. Other specific toxicants masked by ammonia's toxicity were detected. Contribution rate of the toxicants other than by ammonia was 41.3 vol% of the total toxicity of the landfill leachate.</jats:p>