Borgohain Arup, Sarmah Mridusmita, Konwar Kaberijyoti, Gogoi Rimjim, Bikash Gogoi Bidyot, Khare Puja, Kumar Paul Ranjit, Handique Jyotirekha G, Malakar Harisadhan, Deka Diganta, Saikia Jiban, Karak Tanmoy
Upper Assam Advisory Centre, Tea Research Association, Dikom, Dibrugarh, Assam 786101, India.
Department of Chemistry, Dibrugarh University, Dibrugarh 786004, India.
Food Chem X. 2022 Feb 19;13:100255. doi: 10.1016/j.fochx.2022.100255. eCollection 2022 Mar 30.
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). 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.
在温室试验中，以两个茶树品种（TV23和S.3A/3）研究了茶修剪废弃物生物炭（TPLBC）对成品茶及其连续冲泡液中砷（As）、镉（Cd）和铬（Cr）含量的影响。用TV23和S.3A/3无性系制备的成品茶，在施用最高剂量的TPLBC（500 kg TPLBC/公顷）时，As、Cd和Cr的浓度分别比对照降低了36.73%、16.22%、13.96%和36.63%、27.78%、10.54%。无论处理如何，所研究元素的浓度在第一次冲泡液中显著较高（p≤0.05），在第三次冲泡液中较低。考虑到每人每天饮用10克成品茶，高剂量TPLBC下As、Cd和Cr的最大平均每日摄入量远低于世界卫生组织规定的可耐受每周摄入量。由于所选元素的危害商值≪1，预计茶消费者不会有明显的不良健康后果。
