In this study, we investigated and evaluated the mineralization pattern of ion-adsorption rare earth deposits in granite weathering crusts using remote sensing technology for the southeastern region of Guangxi, and we proposed a strategy for sustainable mining and utilization. Through detailed analysis of the stratification characteristics, mineralogical features, and rare earth element (REE) distribution patterns of the weathering crust, it is found that the rare earth minerals are mainly enriched in the completely weathered layers, with light rare earth elements (La, Ce, Pr, Nd) dominating. This study reveals the transformation mechanism of rocks and minerals during the weathering process, especially the important role of kaolinite, feldspar, and smectite in the enrichment of rare earth elements. Combined with remote sensing image analysis, the intrinsic connection between linear tectonics and mineralization is explored, and potential directions for sustainable exploration are proposed. This study deepens the understanding of the mineralization mechanism of rare earth deposits in the region and provides scientific basis and technical support for the sustainable exploration and development of rare earth resources, and it has important economic and environmental significance.

Cadmium (Cd) ions can significantly affect plant growth and development. They promote plant growth up to a certain concentration, but high concentrations may inhibit normal plant growth. However, Cd pollution also threatens ecosystem security and may pose a potential risk to human health. Bioremediation has received significant attention as a method for reducing soil pollution, including Cd contamination. Therefore, this study evaluated the phytoremediation potential of Bougainvillea spectabilis Willd. (Triangle plum), Hibiscus rosa-sinensis Linn (Safflower), and Cuphea ignea (Cigar flower) in Cd-contaminated soil that simulated the conditions found in mine tailings ponds. The results indicated that there were significant differences in Cd ion accumulation among the three flowering shrubs. Triangle plum had the greatest enrichment ability, followed by Cigar flower and then Safflower. Triangle plum leaves showed the greatest enrichment ability, followed by the stems and roots. In contrast, the Cigar flower roots showed the greatest enrichment ability followed by the leaves and the stems. However, their translocation factor (TF) values were similar. The enrichment effect of Safflower leaves was the strongest, followed by its roots, with relatively little accumulation in its stems, and its TF value varied within a certain range. This study provides a scientific basis for the bioremediation of soil Cd pollution and new information about the abilities of different flowering shrubs and their parts to accumulate Cd.