Factorial design used on the extraction and fixation of acid volatile sulfides (AVS) from sediment samples

Quimica nova

Quinaia, Sueli Pércio¹  Schnitzler, Danielle Caroline²  Grassi, Marco Tadeu² 

[1] Universidade Estadual do Centro-Oeste, Guarapuava, Brasil;Universidade Federal do Paraná, Curitiba, Brasil

关键词: factorial design;    sediments;    AVS.;   

DOI  :  10.1590/S0100-40422009000500038

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The AVS is defined operationally as acid volatile sulfide, which is a controlling phase on the partition of some metallic species in sediments. A Factorial design was evaluated by means of 16 experiments and using four variables: temperature, extraction time, N2 flow, and volume of the S2- collection solution. The factors that contributed to the efficiency of the process were the extraction time and the N2 flow. Trapping of S2- was efficient in AAB. The S2- was quantified using a potentiometric procedure. Recovery tests for S2- concentrations varying from 1×10-5 to 1×10-4 mol L-1 were in the range from 93 to 116%.

【 授权许可】

CC BY