The extraction values of the total variance using PCA for the sampling sites, based on the physico-chemical parameters are presented in Table 6.
At pH 5.0 and 6.0, the percentage extraction values of Zn II) were 23.4 and 74.47 %, and metal capacities were 24.75 and 54.13 mg g−1.
Table 6 Extraction values of the total variance using principal component analysis for sampling sites based on physico-chemical parameters Component Extraction sums of squared loadings Rotation sums of squared loadings Total % of variance Cumulative % Total % of variance Cumulative % 1 33.594 88.405 88.405 22.753 59.875 59.875 2 2.014 5.299 93.704 12.855 33.829 93.704.
The percentage extraction values of Cu II) and Cd II) from water and wastewater samples were ranged as 86.80 88.01% and 72.56 70.67%, respectively using 60 70 s heating via MES technique.
Quantitative recovery of Cr VI) was accomplished by alumina phases (I III) in pH 1.0 giving percentage extraction values of ∼99.9 100.0%, while Cr III) was found to be quantitatively recovered by these sorbents in pH 7.0 leading to percentage extraction values ∼100.0% with minimal or no interference between these two species under the studied buffering conditions.
In the formula, K 1 and K 3 are the coefficients which are smaller than 1, D 1 and D 3 respectively, are the length of transverse and longitudinal in the actual goaf, when n 1 and n 3 are larger than 1, it reached critical extraction, on the contrary, it is subcritical extraction, the value of K 1 and K 3 are equal to 0.7.
Under optimized conditions, the extraction yield value of trans-resveratrol was 92.8% in a one-step extraction.
For fundamental phasor extraction, the value of k is unity as given in Eq. (2).
Maximum extraction yield value of Se reached after 600 min only in the case of test L. Open image in new window Fig. 5 Kinetics of the five batch-leaching tests: extraction yield versus time (min).
The distribution of percentage extraction values was approximately normal for all analytes except geraniol and citronellol; however, transformation of the latter data had no significant effect on analysis.
