Temporal performance assessment of wastewater treatment plants by using multivariate statistical analysis

Investigating Industrial Effluent Impact on Municipal Wastewater Treatment Plant in Vaal, South Africa

“…Among the heavy metals, a significant positive correlation Pb (r = 0.96, p < 0.001) with Cu could indicate the same or similar source input. Consistent with our results, Zinabu et al [45] and Ebrahimi et al [33] reported positive correlation between heavy metal in rivers waters polluted with industrial wastewaters. Poor correlation between physicochemical parameters and the heavy metal content of WWTP influent and effluent wastewater was also noted ( Table 4).…”

“…Generally, carwash effluent (Industry 4 ) contains a number of contaminants such as sand/dust, salt, oils, grease, organic matter and metal ions that may also influence the resultant wastewater pH, TDS, EC, salinity and heavy metal composition [30,31]. Similar to our finding, other studies have reported that significantly higher EC, TDS and salinity occur during months of low precipitation (such as winter in South Africa), as increased evaporation leads to a more concentrated effluent [32][33][34]. Conversely, the dilution effect on the wastewater milieu during high precipitation months (summer) influences the resultant effluent composition (Supplementary Material, Table S1).…”

“…Overall, the heavy metal levels reported in this study were very low compared with those reported in polluted rivers linked to industrial and WWTP effluents [3,[32][33][34]45,51]. One limitation of the study is that heavy metal composition was only done on water samples that generally gives lower heavy metal composition, particularly at higher pH condition.…”

Engineering applications of organic surfactant modified bentonite in sorptive soil barriers.

“…This obtained results from this study showed the promising application of organoclays as an amendment for CCL and GCL barriers (Ebrahimi et al 2017;Mirbagheri et al 2014). Also, it was concluded that organoclays are sufficient sorbents to uptake the dissolved contaminants in the fast flow rate barriers such as PRBs.…”

Assessment of the pollution degree of the dnepr river and development of measures for its decrease

“…To determine the general condition of quality of untreated and treated waste water, Wastewater Quality Index (WWQI) was proposed [5]. This index summarizes a large number of measured quality parameters in a single indicator of water quality, taking into account pre-established standards of quality limitation.…”