The Role of Sediment Humic Substances in Cu and Cr Concentrations in the Pore Water of a Typical Area of Cultivation of Sugar Cane in S(a)o Paulo/Brazil
Humic substances (HS) have an important environmental property,the capacity of complexing metal species.Given this property,studies to understand the behavior of HS with metals are of great relevance.Thus,a study was performed to understand the interaction of sediment humic substances with copper(Ⅱ) and chromium(Ⅲ) and how such substances may influence the availability of these metals in pore water.The complexing capacity (CC) of HS with copper and chromium was determined by means of an ultrafiltration system with tangential flow and the values ranged from 0.39 to 0.63 mmol Cu g1 HS and 0.22 to 0.90 mmol Cr g-1 HS for copper and chromium,respectively.It was observed that the greater the complexing ability of humic substances with Cr,the lower the concentration of metal present in the pore water.Copper did not show this pattern of behavior.Therefore,the HS are important in the reduction of metals in pore water,which may reduce the transport of metals in the sediment into the water column.
Humic substances Complexation Sediment Metals Pore water
G.Pantano M.B.Campanha A.B.Moreira M.C.Bisinoti
Instituto de Bioci(e)ncias,Letras e Ci(e)ncias Exatas,Department of Chemistry and Environmental Sciences,Universidade Estadual Paulista Jú1io de Mesquita Filho-S(a)o José do Rio Preto,S(a)o Paulo,Brazil
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
350-352
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）