Effect of phosphatation and calcination on the environmental behaviour of sediments
Effect of phosphatation and calcination on the environmental behaviour of sediments作者机构：Department of Civil & Environmental Engineering Toulouse University Mines Albi CNRS RAPSODEE Center Campus Jarlard SOLVAY SA DCRT 4. PRAYON SA
出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))
年 卷 期：2019年第34卷第5期
页 面：486-495页
核心收录：
学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0903[农学-农业资源与环境] 0815[工学-水利工程] 0816[工学-测绘科学与技术]
基 金：Solvay Company Prayon for the financial support for this research
主 题：Polluted sediments Heavy metals Phosphatation Calcination and environmental behaviour
摘 要：Dredging operations produce considerable quantities of materials, to be managed and this opens an opportunity for valorization in civil engineering. However, the contamination of the dredged sediment has become a major problem to solve. The major contaminants are heavy metals and organic compounds This study focuses on the use of phosphoric acid(H3 PO4) to stabilize heavy metals from sediments an destroy organic matter by calcination at 650 °C with a goal of using sediments in roadworks. Severa studies have been conducted in this field. The stabilized materials obtained have been used in civ engineering. The main purpose of this work is to discuss the environmental behavior of marine sedimen treated by phosphatation and calcination. Two types of phosphoric acids were used. The p H dependenc leaching test has been used as the basic characterization to evaluate the effect of the type of phosphori acid on the metals behavior in a valorization scenario. The standard leaching test and the Toxicit Characteristic Leaching Procedure(TCLP) were conducted as compliance tests. In regards of the obtaine results, the environmental assessment has also shown a reduction in the availability of targeted heav metals in alkaline environment whatever the type of acid used for treatment. This opens opportunitie for co-valorization.
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