低分子量芳香酸调解了Cd2+对生物炭的吸附:作用和机制
Zhiqiang Zhao1, Jiuyan Chen2, Shuai Gao1
1Shandong Engineering Research Center for Environmental Protection and Remediation on Groundwater, No. 801 Hydrogeology and Engineering Geology Brigade, Shandong Provincial Bureau of Geology & Mineral Resources, Jinan, 250353, China.
Environmental science and pollution research international
|February 1, 2024
概括
低分子量芳香酸 (LWMAA) 显著抑制 (Cd2+) 吸附到生物炭上,影响其在环境修复中的使用. 了解这些相互作用对于有效的土壤和水处理战略至关重要.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 水的化学 水的化学
背景情况:
- 低分子量芳香酸 (LWMAAs) 在自然环境中很常见,并影响金属的行为.
- 对于LWMAA对生物炭吸附有毒金属的影响尚不清楚.
- 生物炭越来越多地用于土壤整治和废水处理.
研究的目的:
- 调查三种LWMAA (酸,p-基酸,注射酸) 对生物炭Cd2+吸附的影响.
- 检查生物炭特性 (热解温度) 和溶液条件 (pH) 如何影响这些相互作用.
- 阐明LWMAA抑制Cd2+吸附到生物炭背后的机制.
主要方法:
- 批量吸附实验使用在不同热解温度下产生的生物炭进行.
- 测量了Cd2+的吸附在存在和缺乏酸,p-基酸和注射剂酸的情况下.
- 在酸性和中性条件下控制溶液pH值.
主要成果:
- 生物炭的Cd2+吸附能力通常随着高热解温度的增加而增加,这是由于提高了无机含量和芳香度.
- 通过竞争性吸附,孔隙阻塞,削弱矿物金属相互作用和可溶性复合物形成,LWMAAs显著抑制了生物炭上的Cd2+吸附.
- LWMAA的抑制作用按照以下顺序进行:注射酸>p-基酸>酸,与它们的物理化学特性有关.
结论:
- LWMAA在调节生物炭对Cd2+等潜在有毒金属的吸附方面发挥着至关重要的作用.
- LWMAA的类型及其特性显著影响抑制的程度.
- 这些发现强调了考虑LWMAA在基于生物炭的环境修复应用中的存在的重要性.
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