Determination of sorption of seventy-five pharmaceuticals in sewage sludge

TLDR: Sorption of 75 active pharmaceutical ingredients (APIs) to three different types of sludge (primary sludge, secondary sludge with short and long sludge age respectively) were investigated and a significant difference in Kds due to pH changes were found for 6 of the APIs (variation 10-20%).

About: This article is published in Water Research.The article was published on 2011-10-01 and is currently open access. It has received 260 citations till now. The article focuses on the topics: Sludge.

Figures

Table 4. Sorption isotherms obtained during sorption to secondary sludge short sludge age. P is the significance that the linear model has a better fit than another model tested, the model tested was Freundlich and Langmuir.

Figure 3. Estimated fraction, i.e. the fraction of the total APIs load into the activaed sludge tank which isn’t lost either by degradation or stripping,

Table 5. Evaluating the effect of pH within the pH rang fora WWTP, pH 6-8. Average one point Kd values with standard deviation (n=3) obtained in sludge from secondary sludge long sludge age at pH 6, 7 and 8for the concentration 10 µg L-1. By employing one way ANOVA with a 95 % confidence interval was the following question asked; are the means significantly different?

Table 3. Sorption isotherms obtained during sorption to secondary sludge long sludge age P is the significance that the linear model has a better fit than another model tested, the model tested was Freundlich and Langmuir.

Figure 2. The plot illustrates that for majoring of the APIs in this study it was not possible estimate their sorption behavior based on log Dow.

Table 1. The experimental set up, including API concentrations, pH sludge concentration and the number of bottles per blank/zero sludge/sludge. From each bottle triplicate solid phase extractions (SPE) were made.

Frequently asked questions

Q1. What are the contributions mentioned in the paper "Determination of sorption of seventy five pharmaceuticals in sewage sludge" ?

Sorption of 75 active pharmaceutical ingredients ( APIs ) to three different types of sludge ( primary sludge, secondary sludge with short and long sludge age respectively ) was investigated. Furthermore, the effect of pH at values 6, 7 and 8 was evaluated using one way ANOVA-test.