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Title: Hydrothermal Detoxization of Slate Containing Asbestos and the Possibility of Application for Fertilizer of its Products

Abstract

Hydrothermal decomposition of slate (building materials) containing asbestos has been attempted by using a NH{sub 4}H{sub 2}PO{sub 4} solution. Firstly, the alteration of chrysotile as a starting material was investigated under hydrothermal conditions of 200 deg. C, 12 hrs of reaction time and with a phosphate solution. It was confirmed that the original fibrous form of chrysotile had been perfectly collapsed by the SEM observation. The chrysotile (asbestos) disappeared to form Mg-Ca-Silicate (Ca{sub 7}Mg{sub 2}P{sub 6}O{sup 24}) estimated by XRD. The composition and chemical form of reaction products (Mg-Ca-Silicate) was predicted to application as a fertilizer. Fertilizer effect of these resulted product on cultivations of Japanese radish (leaves), soybeans and tomatoes, was examined by using a special medium of mixed soil with a low content of N, P, K and a thermal-treated zeolite one. The fertilizer effects of the product were compared to commercial fertilizers such as N, N-K-P and P types. In order to estimate the fertilizer effect, the size of crops, number of fruits and number of leaves were measured everyday. As a result, these hydrothermal products of slate containing asbestos were as good as commercial fertilizers on the market. Fruits groups especially had a good crop usingmore » the hydrothermal slate product. These results show that the main components of hydrothermal treatments slate are calcium silicate and magnesium phosphate. Its decomposition reaction products may have the possibility of application for fertilization of crops which require nucleic acid--phosphorus.« less

Authors:
; ;  [1]; ;  [2]
  1. Research Institute of Aqua Science and Technology 107 Ko, Sakawa-cho, Takaoka-gun, Kochi 789-1201 (Japan)
  2. Research Institute of Technology, Konoshima Chemical Co., Ltd. 80 Koda, Takuma-cho, Mitoyo-city, Kagawa 769-1103 (Japan)
Publication Date:
OSTI Identifier:
21513116
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1251; Journal Issue: 1; Conference: 2. international symposium on aqua science, water resource and low carbon energy, Sanya Hainan (China), 7-10 Dec 2009; Other Information: DOI: 10.1063/1.3529320; (c) 2010 American Institute of Physics; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AMMONIUM PHOSPHATES; ASBESTOS; BUILDING MATERIALS; CALCIUM SILICATES; COMPOSITE MATERIALS; DECOMPOSITION; FERTILIZATION; FERTILIZERS; MAGNESIUM PHOSPHATES; NUCLEIC ACIDS; PHOSPHORUS; SCANNING ELECTRON MICROSCOPY; SOILS; SOLUTIONS; TEMPERATURE RANGE 0400-1000 K; X-RAY DIFFRACTION; ZEOLITES; ALKALINE EARTH METAL COMPOUNDS; AMMONIUM COMPOUNDS; CALCIUM COMPOUNDS; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; ELECTRON MICROSCOPY; ELEMENTS; HOMOGENEOUS MIXTURES; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MAGNESIUM COMPOUNDS; MATERIALS; MICROSCOPY; MINERALS; MIXTURES; NONMETALS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; SCATTERING; SILICATE MINERALS; SILICATES; SILICON COMPOUNDS; TEMPERATURE RANGE

Citation Formats

Myojin, Sachi, Yamasaki, Chizuko, Yamasaki, Nakamichi, Kuroki, Toshihiro, and Manabe, Wataru. Hydrothermal Detoxization of Slate Containing Asbestos and the Possibility of Application for Fertilizer of its Products. United States: N. p., 2010. Web. doi:10.1063/1.3529320.
Myojin, Sachi, Yamasaki, Chizuko, Yamasaki, Nakamichi, Kuroki, Toshihiro, & Manabe, Wataru. Hydrothermal Detoxization of Slate Containing Asbestos and the Possibility of Application for Fertilizer of its Products. United States. https://doi.org/10.1063/1.3529320
Myojin, Sachi, Yamasaki, Chizuko, Yamasaki, Nakamichi, Kuroki, Toshihiro, and Manabe, Wataru. 2010. "Hydrothermal Detoxization of Slate Containing Asbestos and the Possibility of Application for Fertilizer of its Products". United States. https://doi.org/10.1063/1.3529320.
@article{osti_21513116,
title = {Hydrothermal Detoxization of Slate Containing Asbestos and the Possibility of Application for Fertilizer of its Products},
author = {Myojin, Sachi and Yamasaki, Chizuko and Yamasaki, Nakamichi and Kuroki, Toshihiro and Manabe, Wataru},
abstractNote = {Hydrothermal decomposition of slate (building materials) containing asbestos has been attempted by using a NH{sub 4}H{sub 2}PO{sub 4} solution. Firstly, the alteration of chrysotile as a starting material was investigated under hydrothermal conditions of 200 deg. C, 12 hrs of reaction time and with a phosphate solution. It was confirmed that the original fibrous form of chrysotile had been perfectly collapsed by the SEM observation. The chrysotile (asbestos) disappeared to form Mg-Ca-Silicate (Ca{sub 7}Mg{sub 2}P{sub 6}O{sup 24}) estimated by XRD. The composition and chemical form of reaction products (Mg-Ca-Silicate) was predicted to application as a fertilizer. Fertilizer effect of these resulted product on cultivations of Japanese radish (leaves), soybeans and tomatoes, was examined by using a special medium of mixed soil with a low content of N, P, K and a thermal-treated zeolite one. The fertilizer effects of the product were compared to commercial fertilizers such as N, N-K-P and P types. In order to estimate the fertilizer effect, the size of crops, number of fruits and number of leaves were measured everyday. As a result, these hydrothermal products of slate containing asbestos were as good as commercial fertilizers on the market. Fruits groups especially had a good crop using the hydrothermal slate product. These results show that the main components of hydrothermal treatments slate are calcium silicate and magnesium phosphate. Its decomposition reaction products may have the possibility of application for fertilization of crops which require nucleic acid--phosphorus.},
doi = {10.1063/1.3529320},
url = {https://www.osti.gov/biblio/21513116}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1251,
place = {United States},
year = {Wed Nov 24 00:00:00 EST 2010},
month = {Wed Nov 24 00:00:00 EST 2010}
}