Metal and Rare Earth Elements in Lapindo Mudflow Sediments: Environmental Impact and Economic Significance

Abstract

The Lapindo mudflow, which has been a source of significant environmental and socioeconomic challenges, has drawn attention to the contamination of sediments, particularly with metals and rare earth elements (REEs). A review of existing literature highlights various factors influencing sediment contamination, including natural geological processes and human activities such as mining and industrial operations. Research indicates that metals like cadmium (Cd), copper (Cu), and iron (Fe), along with REEs such as lanthanum (La), cerium (Ce), and neodymium (Nd), are commonly found in the Lapindo mudflow sediments. These elements not only impact local ecosystems but also have potential significance for their economic extraction, especially for optoelectronics application where its availability is crucial especially in current unstable word situation. Several studies also emphasise the role of miner-alogical composition, which affects the mobility, bioavailability, and retention of contaminants in sediments. Biological remediation, through natural processes such as phytoremediation and microbial degradation, has also been explored as a means to mitigate the negative effects of contamination. However, current literature highlights the need for more comprehensive studies on the long-term environmental and economic consequences of sediment contamination. This review concludes that while some aspects of Lapindo mudflow contamination have been explored, there remains a significant gap in understanding the full scope of the impacts and opportunities for sustainable management. The findings underline the importance of continued research to inform mitigation strategies and improve management practices for the long-term benefit of both the environment and local communities. Finally, Lapindo Mudflow can be considered a potential (alternative) source of strategic elements to sustain the production of optoelectronic components (photovoltaics, lighting).