Effect of tea pruning litter biochar (TPLBC) on arsenic (As), cadmium (Cd) and chromium (Cr) content in made tea and successive tea infusions were investigated in a greenhouse experiment with two tea cultivars (TV23 and S.3A/3). Made tea prepared from TV23 and S.3A/3 clone, a decrease in the concentration of As, Cd, and Cr by 36.73%, 16.22%, 13.96%, and 36.63%, 27.78%, 10.54%, respectively over control on the application of the highest dose of TPLBC (500 kg TPLBC ha-1). Irrespective of treatments, studied element concentrations were significantly higher (p ≤ 0.05) in the first infusion and lower in the third. Considering Ten g made tea consumption per person per day, the maximum average daily intakes of As, Cd and Cr in a higher dose of TPLBC were far below the tolerable weekly intake prescribed by the World Health Organization. As hazard quotient values of selected elements were ≪ 1, no significant adverse health consequences are expected for tea consumers.
Keywords: ADI, Average daily intake; ANOVA, Analysis of variance; Ammonium acetate (PubChem CID: 517165); Ammonium molybdate (PubChem CID: 21977535); Arsenic (PubChem CID: 5359596); Average daily intake; Boric acid (PubChem CID: 7628); Cadmium (PubChem CID: 23973); Chromium (PubChem CID: 23976); Copper sulphate (PubChem CID: 24462); HQ, Hazard quotient; Hazard quotient; Health risk; Hydrochloric acid (PubChem CID: 313); INF-1, First infusion; INF-2, Second infusion; INF-3, Third infusion; Infusion; Nitric acid (PubChem CID: 944); Perchloric acid (PubChem CID: 24247); Potassium Dichromate (PubChem CID: 24502); Potassium iodide (PubChem CID: 4875); Potassium sulphate (PubChem CID: 24507); Sodium borohydrate (PubChem CID: 22959485); Sodium hydroxide (PubChem CID: 14798); Stannous chloride, dihydrate (PubChem CID: 10198436); TPLBC, Tea pruning litter biochar; TV, Tocklai vegetative; Tea pruning litter biochar; Tin (PubChem CID: 5352426); Trace elements; Transfer rate.
© 2022 The Author(s).