Comprehensive geophysical, geotechnical, and geochemical assessments of an Offshore Landfill in Singapore

IF 12.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Hazardous Materials Pub Date : 2024-09-19 DOI:10.1016/j.jhazmat.2024.135908

Zhibo Zhang, Ziwen Yuan, Lei Hu, Frederic Coulon, Huaxin Liu, Zhanbo Cheng, Shifan Wu, Qian Liu, Xiaoqing Pi, Wei Wu, Xunchang Fei

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Abstract

Comprehensive site investigation techniques, including Electrical Resistivity Tomography (ERT), Induced Polarization (IP), Multichannel Analysis of Surface Waves (MASW), and Microtremor Array Method (MAM), were integrated with geotechnical and geochemical tests of retrieved waste samples from Singapore’s operational offshore landfill. The properties of landfill wastes vary widely, including shear-wave velocities 127-248 m/s, densities 1.2-2.1 Mg/m³, resistivity 3.0-25.3 Ω∙m, and chargeability 48-82 mV/V. The natural clay layer underneath was clearly delineated and effectively mitigated leachate leakage. K-means clustering of the geophysical data facilitates precise mapping of waste distribution and quantities of recoverable metals based on quantitative criteria. This study illustrates a thorough case study adopting the new site investigation and characterization paradigm for an offshore landfill, which provides insights into leachate leakage detection and evaluations of landfill mining and resource recovery.

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对新加坡海上垃圾填埋场进行综合地球物理、岩土工程和地球化学评估

综合现场勘测技术，包括电阻率层析成像（ERT）、诱导极化（IP）、表面波多通道分析（MASW）和微震颤阵列法（MAM），与从新加坡运行中的海上垃圾填埋场回收的废物样本的岩土工程和地球化学测试相结合。垃圾填埋场废物的性质差异很大，包括剪切波速度 127-248 m/s、密度 1.2-2.1 Mg/m3、电阻率 3.0-25.3 Ω∙m、电荷率 48-82 mV/V。其下的天然粘土层界限分明，可有效减少渗滤液的渗漏。地球物理数据的 K-means 聚类有助于根据定量标准精确绘制废物分布图和可回收金属的数量。本研究采用新的现场调查和特征描述范例，对海上垃圾填埋场进行了深入的案例研究，为垃圾渗滤液泄漏检测以及垃圾填埋场采矿和资源回收评估提供了启示。

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来源期刊

Journal of Hazardous Materials 工程技术-工程：环境

CiteScore

25.40

自引率

5.90%

发文量

3059

审稿时长

58 days

期刊介绍： The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.