Influence of Biochar on Plant Uptake of Personal Care Products: Caffeine and Triclosan

Proceedings of International Forestry and Environment Symposium Pub Date : 2024-02-15 DOI:10.31357/fesympo.v27.6602

Keerthanan S., Jayasinghe C., Vithanage, M.

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Abstract

The use of personal care products (PCPs) extends a person's longevity. Nonetheless, because of its uncontrolled burden on the environment, it is regarded as an emerging contaminant. The goal of this research is to determine the influence of cinnamon wood biochar (CWBC) on plant uptake of caffeine (CFN) and triclosan (TRI) from the soil. Ipomeoa aquatica was cultivated for 4 weeks in soil with a 2.5% CWBC amendment and spiked with 100 mg/kg CFN and 200 mg/kg TRI. Ultra- High-performance liquid chromatography (UHPLC) was used to quantify the CFN and TRI in the plant. The surface morphology of CWBC was investigated by scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) surface area. The gasification of biomass which increased the CWBC's surface area to 589 m2/g, due to the development of a porous structure. The CFN accumulated more in the shoot of the plant whereas TRI accumulated in the root. The addition of 2.5% CWBC significantly (p<0.05) decreased the root and shoot accumulation of CFN by 40.4% and 70.9%, whilst those for TRI by 38.9% and 19.9%, respectively. The relative bioconcentration factors (RBF) of CFN and TRI in shoot and root was calculated by the ratio of bioconcentration factor (BCF) using RBF=〖BCF(CWBC amended soil)⁄〖BCF_soil and the results suggested that the addition of 2.5% CWBC decrease the RBF below the one indicating the effectiveness of CWBC towards mitigating the plant uptake of PCPs. Overall, the present study suggested the application of biochar to soil significantly decreased the plant uptake of PCPs, thus, can reduce the potential risk caused by the unintentional consumption of contaminated vegetables. Keywords: Personal Care Products, Soil amendment, Health risk, Plant uptake

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生物炭对植物吸收个人护理产品的影响：咖啡因和三氯生

使用个人护理产品（PCPs）可以延长人的寿命。然而，由于其对环境造成的负担不受控制，它被视为一种新出现的污染物。本研究的目的是确定肉桂木生物炭（CWBC）对植物从土壤中吸收咖啡因（CFN）和三氯生（TRI）的影响。在添加了 2.5% CWBC 的土壤中栽培水生苕子 4 周，并添加 100 毫克/千克 CFN 和 200 毫克/千克 TRI。采用超高效液相色谱法（UHPLC）对植物中的 CFN 和 TRI 进行定量。利用扫描电子显微镜（SEM）和布鲁纳-埃美特-泰勒（BET）表面积研究了 CWBC 的表面形态。生物质气化后，由于形成了多孔结构，CWBC 的表面积增加到 589 m2/g。CFN 更多地积聚在植物的芽部，而 TRI 则积聚在根部。添加 2.5% 的 CWBC 后，CFN 在根部和芽部的累积量分别显著减少了 40.4% 和 70.9%（p<0.05），而 TRI 的累积量则分别减少了 38.9% 和 19.9%。使用 RBF=〖BCF（CWBC 改良土壤）〗⁄〖BCF_soil〗，通过生物富集因子（BCF）的比值计算出 CFN 和 TRI 在芽和根中的相对生物富集因子（RBF），结果表明，添加 2.5% 的 CWBC 可使 RBF 降至 1 以下，这表明 CWBC 可有效减轻植物对五氯苯酚的吸收。总之，本研究表明，在土壤中施用生物炭能显著减少植物对五氯苯酚的吸收，从而降低因无意食用受污染蔬菜而造成的潜在风险。关键词个人护理产品土壤改良剂健康风险植物吸收

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Proceedings of International Forestry and Environment Symposium

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