Salt-Affected Soil Amelioration with Flue Gas Desulfurization By-Products and Waste Gypsum Board in Tianjin, China

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概要

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• Soil salinization has progressed rapidly in northeastern and western China. In addition, air pollution is one of the most serious environmental problems. To alleviate the problems of soil salinization, food shortages, and air pollution, we have studied the amelioration of salt-affected soil using the by-products of flue gas desulfurization (FGD). Moreover, the recycling of waste gypsum produced at both new construction sites and demolition work sites has become a serious challenge in Japan. FGD gypsum in China and gypsum separated from waste gypsum board (WGB) in Japan were added to salt-affected soil as soil amendments. The effects of lignite and peat, which contains humic substances, were also investigated. With treatment, the soils chemical parameters were restored, and agricultural production increased in all fields. Therefore, we confirmed the effectiveness of amelioration of salt-affected soil by both FGD and WGB gypsum. Moreover, the use of lignite and peat with gypsum accelerated the effect of soil amelioration. This result suggests that the application rates of both types of gypsum could be reduced. Thus, we can propose a new salt-affected soil reclamation method using WGB, lignite, and peat in China.

著者

• Sadakata Masayoshi

  Departmemt Of Chemical Engineering University Of Tokyo

• Sakai Yuji

  Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Meguro, Tokyo 153-8902, Japan

• Wang Chang

  Tianjin University of Sceience and Technology

• Ren Shunrong

  Tianjin Institute of Agricultural Resources and Environment

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