Evaluated the adverse effects of cadmium and aluminum via drinking water to kidney disease patients: Application of a novel solid phase microextraction method

• High level of aluminum and cadmium in drinking water creates adverse effect on kidney disorders.
• High level of aluminum and cadmium are found in blood samples of chronic kidney disease.
• Very strong correlation is found between toxic metal exposure via drinking water and blood of CKD.

In present study aluminum (Al) and cadmium (Cd) were determined in ground water samples and assesses human health risks associated with elevated concentrations of toxic metals in dissolved form, using a novel solid phase microextraction (SPμE). Ground water sample (n = 200) and biological sample (blood) of patients having chronic kidney disorders (CKD) along with healthy control subjects of same area (southern part of Pakistan) were collected. A simple system, including the micropipette tip packed with modified ionic liquid-activated carbon cloth (IL-ACC) coated with 8-hydroxyqunilone (8-HQ) attached to syringe. The analytes in water and acid digested blood samples were manually drawn for 2–10 cycles (drawing/discharging) at different pH range. The analytes sorbed on coated ACC were then desorbed with 2.0 mol L−1 HNO3 in ethanol by drawing/discharging cycles for 1–5 times. The concentration of extracted analytes was determined by electrothermal atomic absorption spectrometer. The influence of different variables on the extraction efficiency of Cd and Al, were optimized. The Al and Cd concentrations in groundwater were found to be elevated than recommended limits by the World Health Organization. The urinary N-acetyl-h-glucosaminidase values were significantly higher in CKD patients as compared to refrent subjects (p < 0.001). The significant variation in levels of Cd and Al were observed in blood samples of CKD patients than referents subjects (p < 0.01). The strong positive correlation among Al and Cd levels in groundwater versus blood samples of CKD patients (r = 0.82–0.85) p < 0.01) was observed than those values calculated for referent subjects (r = 0.425–0.536).