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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Sensors and Materials, Volume 18, Number 2 (2006)
Copyright(C) MYU K.K.
pp. 91-101
S&M633 Research Paper
Published: 2006

Ability of Water Lilies to Purify Water Polluted by Soap and Their Application in Domestic Sewage Disposal Facilities [PDF]

Masahiro Tani, Ayako Sawada and Takashi Oyabu

(Received October 3, 2005; Accepted April 17, 2006)

Keywords: water purification, water lily, domestic sewage disposal facilities, COD

Aquatic plants have the capability to decrease water pollution level. This capability was examined using water lilies in pots. The pots were placed in 50-l aquariums. Soap was adopted as the pollutant. It is a main water pollutant from households. Purification capability was evaluated by measuring chemical oxygen demand (COD) and dissolved oxygen (DO) concentration. An evaluation index was derived using the half-width (tw) at half maximum of a characteristic COD peak. The influences of water temperature and soap concentration on the index were examined. tw decreased as water temperature increased, and the purification capability improved; tw, therefore, is a measure of purification capability. It decreased as soap concentration increased and tw became larger. An average person uses about 3 g of soap and 50–100 l of w ater when he showers. This amount of soap (3 g) was added to the aquariums and a predictive curve for the purification of water at 25oC was introduced. The main polluting element in a household is phosphorus. The application of water lilies to domestic sewage disposal facilities for decreasing water pollution level was considered.

Corresponding author: Takashi Oyabu


Cite this article
Masahiro Tani, Ayako Sawada and Takashi Oyabu, Ability of Water Lilies to Purify Water Polluted by Soap and Their Application in Domestic Sewage Disposal Facilities, Sens. Mater., Vol. 18, No. 2, 2006, p. 91-101.



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