Remediation of lead-contaminated sediment by biochar-supported nano-chlorapatite (cas 1306-04-3): Accompanied with the change of available phosphorus and organic matters

Add time:08/12/2019    Source:sciencedirect.com

Some rivers in China have been seriously contaminated due to the discharge of lead (Pb) smelting wastewater. In this study, biochar-supported nano-chlorapatite (BC-nClAP) was synthesized to immobilize Pb in contaminated sediment. The remediation effect of BC-nClAP on Pb-contaminated sediment was evaluated through batch experiments and the materials were characterized by x-ray diffraction, scanning electron microscope, Brunner-Emmet-Teller and electronic differential system. It was found that BC-nClAP can transform Pb effectively from labile fraction into stable fraction with a maximum transformation efficiency increasing to 94.1% after 30 days of treatment, and the stabilization efficiency of toxicity characteristic leaching procedure reached 100% only after 16 days of treatment. The content of available phosphorus (AP) in the sediments treated by BC-nClAP was much less than that treated by nClAP, which indicated a lower risk of eutrophication and suggested the dissolution-precipitation mechanism involved in Pb immobilization. BC-nClAP presented the best immobilization efficiency of Pb and the content of organic matters in BC-nClAP treated samples increased the most, thus the OM might play an important role during the Pb immobilization.

We also recommend Trading Suppliers and Manufacturers of chlorapatite (cas 1306-04-3). Pls Click Website Link as below: cas 1306-04-3 suppliers

Prev:Mechanosynthesis of carbonate doped chlorapatite (cas 1306-04-3)–ZnO nanocomposite with negative zeta potential
Next:Rhamnolipid stabilized nano-chlorapatite (cas 1306-04-3): Synthesis and enhancement effect on Pb-and Cd-immobilization in polluted sediment)