pH control on organic and organo-mineral colloids carrying major and trace elements in leachates of wetland sludge deposits

被引：5

作者：

Banc, Camille ^{[1
,2
]}

Gautier, Mathieu ^{[1
]}

Blanc-Biscarat, Denise ^{[1
]}

Lupsea-Toader, Maria ^{[1
]}

Marsac, Remi ^{[3
]}

Gourdon, Remy ^{[1
]}

机构：

[1] Univ Lyon, INSA Lyon, DEEP, EA 7429, F-69621 Villeurbanne, France

[2] CEA, Lab Environm Transfer Modeling, DES, IRESNE, F-13108 St Paul Les Durance, France

[3] Univ Rennes, CNRS, Geosci Rennes, UMR 6118, F-35000 Rennes, France

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 471卷

关键词：

FLOW CONSTRUCTED WETLAND; IRON SPECIATION; SOIL SOLUTIONS; HEAVY-METALS; MATTER; ADSORPTION; MOBILITY; SORPTION; FE; PHOSPHATE;

D O I：

10.1016/j.cej.2023.144244

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Emission of colloids from treatment wetlands solid deposit (SD) may affect the speciation, toxicity and transfer of organic and inorganic pollutants, thereby conwide range of pH between 2 and 12. Results evidenced the mobilization of high quantity of organic carbon leached from the SD and Al-Fe colloidal minerals embedded by large organic molecules. Based on their varying affinity for the different colloidal phases, three groups of chemical species were established: (i) elattributed to variations in the pH/Eh of the solutions, the nature of the colloidal phases, and the ionic properties of the considered elements. Small pH variations were found to modify drastically the speciation of the elements solubilized with potential effect on their (bio)availability. Results obtained on this study can be used to enhance wastewater treatment through constructed wetland process and improve recovery technics applied on solid deposits (agriculture, compounds extraction...).

引用

页数：14