功能工程用于改进机器学习辅助的研究重金属在生物炭上的吸附
Tian Shen1, Haoyi Peng2, Xingzhong Yuan3
1College of Environment and Ecology, Hunan Agricultural University, Changsha, Hunan 410128, China.
Journal of hazardous materials
|January 20, 2024
概括
机器学习模型通过工程元素特征准确地预测生物炭上的重金属吸附. 新的元素比率提高了废水处理应用的模型解释性和通用性.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 生物炭被广泛研究为废水中的重金属吸附.
- 机器学习 (ML) 模型越来越多地用于预测生物炭吸附能力.
- 现有的ML研究优先考虑算法开发而不是特征工程.
研究的目的:
- 为增强ML模型性能设计生物碳特性.
- 为了提高重金属吸附的ML模型的解释性和通用性.
- 确定用于预测吸附能力的关键生物炭特征.
主要方法:
- 在分子基础上对生物炭的工程元素组成特征.
- 开发了一个梯度增强回归 (GBR) 模型.
- 引入了一个新的元素比特征, (H-O-2N) / C,用于模型解释.
- 通过结合外部数据,扩大了模型的通用性.
主要成果:
- 获得了0.997的测试R2 GBR型号的工程特征.
- (H-O-2N) /C比率和生物炭pH被确定为关键预测指标,取代了传统指标,如阴离子交换能力 (CEC).
- 验证了与外部数据集的模型通用性,显示R2为0.78 (没有CEC/SSA) 和0.72 (实验数据).
结论:
- 特性工程显著提高了基于生物炭的重金属吸附的ML模型预测性能和可解释性.
- 拟议的 (H-O-2N) /C特征为吸附机制提供了有价值的见解.
- 开发的ML模型显示出强大的通用性和在废水处理中实际应用的潜力.
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