Cadmium and Lead Sorption/Desorption on Non-Amended and By-Product-Amended Soil Samples and Pyritic Material

Abstract

Batch-type experiments were used to study cadmium (Cd) and lead (Pb) sorption/desorption on forest soil, vineyard soil and pyritic material samples, on the by-products mussel shell, oak ash, pine bark and hemp waste, and on forest soil, vineyard soil and pyritic material amended with 48 t ha −1 of oak ash, mussel shell, and hemp waste. The main results were that the forest soil showed higher Cd and Pb retention than the vineyard soil and the pyritic material. Regarding the byproducts, sorption was in the following order: oak ash > mussel shell > hemp waste > pine bark, with desorption following an inverse sequence. The pH was the parameter that most influenced Cd and Pb sorption. Cd and Pb sorption curves showed better fitting to the Freundlich than to the Langmuir model, indicating the dominance of multilayer interactions. Oak ash and mussel shell were the amendments causing higher increase in Cd and Pb sorption on both soils and the pyritic material (close to 100% with the oak ash amendment), as well as more a pronounced decrease in desorption. These results could be used to favor an effective management of the by-products studied, which could retain Cd and Pb in soils and degraded areas, preventing water pollution.

Perna canaliculus as an Ecological Material in the Removal of o-Cresol Pollutants from Soil

“…The nitrate nitrogen and ammonium nitrogen contents were 5 mg kg −1 DM NO 3 − -N and 1902 mg kg −1 DM NH 4 + -N. Perna canaliculus shells were used as a substance eliminating the negative effects of o-cresol. The dose of mussel shells was determined based on preliminary studies and literature data [39,40,58,59]. Our previous research [58] showed that Perna canaliculus shells used in the dose of 5 mg kg −1 DM are a very good biostimulator of both biochemical and microbiological activity.…”

A review of the multiple benefits of mussel farming

“…Núñez‐Delgado et al . () found that mussel shells are also efficient in cadmium and lead sorption/desorption on forest soil, vineyard soil and pyritic material. Mussel shell has been widely used as a supplement in the poultry industry (Gerry ).…”