榴莲皮生物炭的制备和对水中Pb(Ⅱ)的电化学检测

Preparation of durian skin biochar and its electrochemical detection of Pb(Ⅱ)in water

为了应对日益严重的重金属污染问题,该研究提出了一种创新的解决方案,旨在开发环保、高效且成本低廉的电化学传感器,用于检测水中铅离子(Pb^(2+))。该研究采用榴莲皮废弃物作为生物炭原料,氢氧化钠活化,尿素作为氮源,成功制备了一系列具有介孔结构的氮掺杂生物炭。试验结果显示,当榴莲皮与尿素的比例为1:1时,所制得的碳材料用于修饰工作电极,在Pb^(2+)浓度为0.12mmol·L^(-1)、pH值为3的电解液中,以-1.4V的沉积电压富集180s,扫描速率设定为50mV·s^(-1)的条件下,该传感器对水中Pb^(2+)的检测效果达到最优。该传感器具有高灵敏度和选择性,为水质监测、污染控制以及人类健康的保护提供了一种高效的分析工具。该研究不仅促进了农业废弃物的循环再利用,同时也为水质重金属离子的监测开辟了新的途径。

In response to the growing problem of heavy metal pollution,this study proposes an innovative solution aimed at developing environmentally friendly,efficient and cost-effective electrochemical sensors for the detection of lead ions(Pb^(2+))in water.A series of nitrogen-doped biochar with mesoporous structure were prepared by using durian bark waste as raw material,sodium hydroxide activation and urea as nitrogen source.The experiment not only promoted the recycling of agricultural waste,but also opened up a new way for monitoring heavy metal ions in water quality.The experimental results show that when the ratio of durian peel to urea is 1:1,the prepared carbon material is used to modify the working electrode.In the electrolyte with Pb^(2+)concentration of o.12 mmol:L^(-1) and pH value of 3,the deposition voltage of-1.4 V is enriched for 180 seconds,and the scanning rate is set to 50 mV·s^(-1).The sensor achieves the best detection effect of Pb^(2+)in water.With high sensitivity and selectivity,it provides an efficient analytical tool for water quality monitoring,pollution control and human health protection.