ISSN 2756-3863
International Journal of Manures and Fertilizers ISSN 2756-3863 Vol. 10 (1), pp. 001-008, January, 2022. © International Scholars Journals
Full Length Research Paper
Characteristic of Cd sorption in the copper tailings wasteland soil by amended dissolved organic matter from fresh manure and manure compost
Zi-gang Li1,2, Chuan-zhou Bian1,2 and Xiao-lei Jie2*
1Nanjing Agricultural University, Nanjing 210095, China.
1Zhengzhou College of Animal Husbandry Engineering, Zhengzhou 450003, Henan, China.
Accepted 06 October, 2021
Abstract
The aim of this study was to investigate the effects of dissolved organic matter (DOM) from fresh manure and its compost on the sorption of Cd on copper tailings wasteland and normal farmland soils, in Tongling City, China. In the presence of DOM, Cd sorption capacity decreased markedly for both soils, especially for the copper tailings wasteland. The Cd sorption isotherms could be well described by the Freundlich equation (r2 = 0.98), and the binding intensity parameter of soils in the presence of fresh manure DOM was lower than compost DOM. An increase in DOM concentration significantly reduced the sorption of Cd by both soils. Within the Cd and DOM concentration range studied, the decrease in Cd sorption caused by fresh manure DOM was consistently greater than that of compost DOM. Moreover, the reduction of Cd sorption caused by DOM was more obvious in the soil with higher pH. In addition, the sorption of Cd increased with an increase in pH for both soils without the addition of DOM, while Cd sorption in the presence of DOM was unexpectedly decreased with an increase in pH at a pH >6.6.
Key words: Cd Sorption, copper tailings wasteland soil, fresh manure, manure compost.