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Journal of Degraded and Mining Lands Management
Published by Universitas Brawijaya
ISSN : 2339076X     EISSN : 25022458     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Journal of Degraded and Mining Lands Management is managed by the International Research Centre for the Management of Degraded and Mining Lands (IRC-MEDMIND), research collaboration between Brawijaya University, Mataram University, Massey University, and Institute of Geochemistry, Chinese Academy of Sciences-China Papers dealing with result of original research, and critical reviews on aspects directed to the management of degraded and mining lands covering topography of a landscape, soil and water quality, biogeochemistry, ecosystem structure and function, and environmental, economic, social and health impacts are welcome with no page charge
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Articles 45 Documents
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Search results for , issue "vol. 13 no. 4 (2026)" : 45 Documents clear
Physiological responses and heavy metal detoxification potential of soil bacteria from bioslurry and Lapindo mud Qardhawiy, Hafanie Firdaus; Arbani, Alya Mufida; Lubis, Susi Mulianti; Fitriana, Ilma; Sanjaya, Wilhelmus Terang Arga; Santosa, Dwi Andreas
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11289

Abstract

Heavy metal pollution, especially lead (Pb) and chromium (Cr), poses an environmental problem that requires effective, sustainable remedial technologies. The objective of this study was to characterize the physiological responses and detoxification potential of bacterial isolates from bioslurry and Lapindo mud under Pb and Cr stress and to evaluate their potential as biostimulants. The isolates were morphologically, physiologically, and biochemically characterized and molecularly characterized using the 16S rRNA gene. Then they were evaluated for metal tolerance, Pb and Cr reduction capabilities in liquid media and soil, and detoxification efficiency through bioassays using Macrobrachium sp. The identification results showed that the bioslurry isolate was Paenibacillus polymyxa, and the Lapindo mud isolate was Lysinibacillus xylanilyticus. P. polymyxa showed better exopolysaccharide (EPS) production, phosphate solubilization, indole-3-acetic acid (IAA) synthesis, and nitrogen fixation capabilities, while L. xylanilyticus showed better biofilm formation capabilities. Both isolates were able to withstand metal stress. Bacterial inoculation reduced Pb and Cr residues in both liquid media and soil compared to controls; the highest reduction efficiency was achieved by a consortium of both isolates, 85.0% for Pb and 97.2% for Cr, lowering soil metal residues to 0.558 mg L-¹ (Pb) and 0.057 mg L-¹ (Cr). Detoxified water also supported the survival of Macrobrachium sp., in contrast to treatments without bacteria. These findings indicate that both isolates have the potential to be developed as bioremediation agents and biostimulants to support the restoration of heavy metal-contaminated soil and water bodies.
Fractionation and mobility of nickel between water–sediment interface in a mining-impacted tropical river basin Farahnaz, Ibtisani; Syafila, Mindriany; Abfertiawan, Muhammad Sonny; Handajani, Marisa
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10859

Abstract

Nickel mining in high?rainfall tropical regions produces metal?rich runoff that can substantially alter biogeochemical processes at the water–sediment interface. However, the mechanisms governing nickel partitioning into dissolved, particulate, and sedimentary geochemical fractions in tropical river systems remain insufficiently resolved. This study investigates the fractionation and mobility of Ni, Fe, Mn, Cr, Cu, and Zn in a mining?impacted river in North Maluku, Indonesia, by integrating dissolved–particulate metal separation in water with five?step sequential extraction in sediments. Most metals in sediments were predominantly bound to the residual (RES) fraction, reflecting strong lithogenic control and incorporation into mineral lattices. In contrast, the exchangeable (EXC) fraction—representing the most mobile geochemical phase—followed the order Ni > Zn > Cu > Cr > Mn > Fe, indicating higher potential mobility for nickel relative to other metals. River water showed elevated proportions of dissolved Ni compared to its particulate form, suggesting substantial anthropogenic contributions from mining?derived geochemical runoff. The contrasting dominance of residual?bound metals in sediments and dissolved metals in water highlights a dual?source system in which sedimentary metals are primarily geogenic, whereas dissolved metals are strongly influenced by mining effluents. These findings advance understanding of nickel behavior at the water–sediment interface in tropical rivers and provide a mechanistic basis for predicting metal mobility and ecological risks in mining?impacted environments.
Geospatial analysis of ionic concentrations in borehole and geothermal spring waters of Baleni Village, South Africa Mahlaule, Ntiyiso Ally; Maluleke, Confidence; Makungo, Rachel
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11079

Abstract

The research presents a geographic study examining ionic levels in both borehole and geothermal spring water across Baleni Village, South Africa, which has active geothermal sites and relies on groundwater for its cultural practices. The study examined how spatial variations in hydrogeochemical properties affect water quality, resource management, and energy production. The study aimed to measure ionic levels while mapping their distribution to create baseline data for hydrochemical research. The study analysed 10 water samples, including 5 borehole and 5 geothermal samples, using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), and applied Geographic Information Systems (GIS) and Ordinary kriging interpolation to create maps of ionic distribution. The study showed that pH levels meet acceptable standards. The study found that electrical conductivity, salinity, and total dissolved solids levels exceeded acceptable limits, particularly in geothermal samples. Sodium emerged as the dominant ion, with higher levels resulting from geothermal processes and water–rock interactions. The geological controls created two separate zones, which showed different levels of ionic enrichment. The study recommends continuous monitoring, along with the implementation of water treatment and additional feasibility assessments, to achieve sustainable utilisation, including potential electrochemical energy generation.
The potential use of post-coal mining land of PT Bukit Asam Ombilin Mining Unit, Sawahlunto City, West Sumatra, Indonesia, for animal feed production Azwir, Deni; Mahdi, Mahdi; Yonariza, Yonariza; Fitriana, Widya; Fajri, Muhammad
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10997

Abstract

Post-mining land in the Ombilin Mining Unit is a state-owned asset managed by PT Bukit Asam (PTBA) and cannot be transferred to private ownership. However, several parties have utilized the land for productive activities without a clear legal basis. Recognizing the economic and ecological benefits, PTBA subsequently granted limited-use rights to livestock farming groups to cultivate forage to support local economic empowerment and environmental restoration. This study was conducted in Sawahlunto City, West Sumatra Province, on the post-coal mining land managed by PTBA's Ombilin Mining Unit. The research objective was to describe the regulatory framework for post-mining land use and to analyze its economic prospects through forage farming. A mixed-methods approach was employed, combining qualitative and quantitative descriptive analyses. Qualitative data were obtained through observation, in-depth interviews, and documentation studies covering aspects of policy, licensing, governance, implementation, monitoring, and evaluation. Quantitative data were collected through a census questionnaire administered to PTBA-assisted farmer groups to assess the feasibility of the forage business using cost, income, and revenue-to-cost (R/C) ratio analysis. The results showed that the regulatory framework for land utilization still lacks legal certainty. Nevertheless, governance mechanisms are well-structured, and the forage business demonstrates economic feasibility, as reflected by a positive R/C ratio. Therefore, the productive utilization of post-mining land represents a sustainable strategy for strengthening the local economy while maintaining the land's ecological functions.
Nickel slag as a growth substrate for arbuscular mycorrhizal fungi propagation to support post-mining land reclamation Huwaida, Hanifah; Mansur, Irdika; Prematuri, Ricksy
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10869

Abstract

Indonesia produces approximately 13 million metric tons of nickel slag each year, which has the potential to be used as a soil amendment for post-mining land restoration. This study aimed to evaluate the effectiveness of nickel slag as a propagation medium for four arbuscular mycorrhizal fungus species (AMF) (Acaulospora tuberculata, Glomus manihotis, Glomus etunicatum, and Gigaspora margarita) associated with three pioneer host plants (Sorghum bicolor, Falcataria moluccana, and Pueraria javanica) to support post-nickel-mining land reclamation. The experiment was conducted in a greenhouse using a two-factor completely randomized design over 12 weeks. The results showed that plant survival rates ranged from 79.08% to 83.17% across all treatments. Glomus manihotis performed best, with the highest root colonization rate of 75.91% and a spore density of 89 spores per 20 g of medium. The highest biomass accumulation was observed in Sorghum bicolor, with a shoot dry weight of 3.38 g and a root dry weight of 1.04 g. The results correlated with field data, which showed that mycorrhizal inoculation increased nickel accumulation in plants by 8.33% and safely immobilized up to 9,500 mg kg?¹ of nickel within root tissues. This study concluded that nickel slag has great potential as a carrier medium for producing AMF inoculum. The use of nickel slag supports the principles of a circular economy in the nickel industry, accelerating ecosystem restoration on former mining sites.
Determination of seasonal groundwater recharge potential in the coastal mining town of Jose Panganiban, Philippines Bilaro, Virgil B.; Samaniego, Jessie O.; Quierrez, Rico Neil M.; Peregrino, Fern Rose A.; Paladin, Carr Angelo P.; Tamparong, Bonifacio Jr. B.; Bautista, Angel VII T.
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10903

Abstract

Coastal groundwater resources are highly vulnerable to the combined risks of heavy metal contamination and saltwater intrusion where artisanal small-scale gold mining is active. This study used a GIS-based analysis to identify susceptible coastal aquifers in the municipality of Jose Panganiban, Philippines, by examining the reduction in groundwater potential coincident with the seasonal oscillation of precipitation, the main driver of recharge. The study showed that the general reduction in groundwater potential approaches 25% during the period with the lowest precipitation across the whole study site. Some recharge zones have greater groundwater potential reduction and are thus more vulnerable to saltwater intrusion. The results of this study would lay the preliminary groundwork for more detailed and targeted analysis of at-risk groundwater extraction locations, as well as serve as a guide for local authorities in formulating and implementing an effective, responsive, and sustainable groundwater resource management program.
Evaluation of soil fertility and erosion in oil palm lands post-replanting: A case study in Sungai Muluk Village, Tanjung Jabung Barat Regency, Jambi Province Antony, Dedy; Irianto, Irianto; Kartika, Elis; Nusifera, Sosiawan
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10877

Abstract

Oil palm replanting often increases the risk of soil degradation due to soil disturbance, nutrient depletion, and erosion, particularly in highly weathered Ultisols. This study aimed to evaluate soil fertility status and erosion risk across different slope classes in post-replanting oil palm plantations and to assess the implications of conservation practices for sustainable land management. Soil samples were collected from three slope classes (3-8%, 8-15%, and 15-30%) at two soil depths (0-20 and 20-40 cm) for soil physico-chemical analysis. Erosion estimation was predicted using the Universal Soil Loss Equation (USLE). In addition, a conservation scenario analysis was conducted to evaluate the potential effectiveness of improved conservation practices in reducing erosion risk. The results showed that soil fertility status ranged from low to moderate across all slope classes, mainly due to low cation exchange capacity and base saturation. Soil organic carbon, total nitrogen, and available phosphorus generally decreased with increasing slope and soil depth. Predicted erosion rates varied among slope classes, with the highest erosion occurring in the 3-8% slope class (141.48 t/ha/year), primarily due to inadequate conservation practices. Conservation scenario analysis demonstrated that conservation practice improvement, factor (P) from 0.35 to 0.04, reduced predicted erosion up to 88.6% (16.17 t/ha/year), which is below the tolerable threshold. These findings indicated that integrating soil fertility improvement through organic matter management with effective conservation measures can substantially reduce land degradation risks and support the sustainable management of post-replanting oil palm plantations on Ultisols.
Distribution and correlations of arbuscular mycorrhizal fungi and phosphate-solubilizing bacteria with Pb and Cd in landfill rhizosphere soils Cahyani, Vita Ratri; Ariyanti, Febriana Ida Dwi; Cahyono, Ongko; Maro’ah, Siti
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10887

Abstract

Landfills accumulate various toxic substances, including heavy metals, yet plants can persist in these environments through interactions with functional rhizosphere microorganisms. This study investigated the distribution of cadmium (Cd), lead (Pb), and nutrient status in the rhizosphere soils of phytoremediator plants at the Putri Cempo landfill, and their relationships with arbuscular mycorrhizal fungi (AMF) and phosphate-solubilizing bacteria (PSB) across spatial gradients. Rhizosphere soils were collected from phytoremediators at landfill sites (L1, 0 m; L2, 100 m from L1) and from an agricultural site outside the landfill (L3, 500 m from L1) as a reference. Heavy metals, soil nutrients, AMF population density and diversity, and PSB communities were analyzed. All parameters, except soil pH, differed significantly among sites. The highest Pb and Cd concentrations were recorded at L1 (Pb: 75.28 mg/kg, approximately 16 times higher than L3; Cd: 0.36 mg/kg, undetected at L3), accompanied by elevated nutrient levels. Microbial communities exhibited clear spatial patterns: AMF abundance, spore density, and root colonization increased with distance from the landfill, reaching their highest values at L3, whereas PSB abundance and morphotype diversity peaked at L2. Among the phytoremediator species, Jatropha gossypiifolia accumulated the highest Pb and Cd concentrations and harbored the greatest PSB abundance, while Senna alata exhibited the strongest AMF associations. These metal-tolerant microbes associated with phytoremediator rhizospheres exhibit dual potential as biofertilizers and bioremediation agents.
Enabling sustainable mining in small-scale operations: Evidence from the Green Mining Processing Facility Program in the Philippines Fabula, Jeannie-Rose G.; Orden, Maria Excelsis M.; Hernando, Herald Kam G.; Camaso, Eliza E.; Bautista, Katherine D.A.; Ferrer, Fernando P. Jr.; Cabanayan, Zeren Lucky L.; Madria, Meynard C.; Ilagan, Czelina Loren DC.; Tangonan, Jesusa B.
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10927

Abstract

Gold mining in rural Philippines provides livelihood opportunities but has been associated with environmental degradation and health risks due to the use of mercury and cyanide in extraction processes. To address these concerns, the Green Mining Processing Facility Program for Small-Scale Mining was implemented through a university-led initiative to provide safer and more efficient gold recovery alternatives while reducing environmental impacts and operational costs. This study assessed the governance and adoption outcomes of the established pilot facilities and support systems. An ex-post and process evaluation approach was used, and data were collected through surveys, key informant interviews, and focus group discussions involving miners, local government units, project implementers, and other stakeholders. Results indicated that the facilities were technically viable and had potential economic benefits for small-scale miners. However, utilization remained limited due to institutional and regulatory constraints, including unclear governance arrangements, operational management gaps, restrictions in facility use, and weak stakeholder engagement, rather than technological limitations. Strengthening governance systems, improving regulatory coordination, and establishing clear operational management structures are necessary to enhance adoption and ensure sustainable and safe gold extraction practices.
Distribution of heavy metals in surface water and sediments of the Coata River Basin, Peru: Seasonal variability and ecological risk assessment Ramirez, Johan Denis Aguilar; Ramirez, Alexander Aguilar; Arteaga, Ruby Juniors Alvarez; Cueva, Jhon Antoni Calderon; Quispe , Irene Benita Gil; Alave-Chata, Dany Evangelina
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10915

Abstract

Mining, urban wastewater discharge, and intensive agriculture have degraded freshwater quality across the Andean Altiplano, yet integrated multi-parameter assessments remain scarce for high-altitude tributaries of Lake Titicaca. This study evaluated the spatial and seasonal distribution of seven heavy metals (As, Cd, Cr, Cu, Hg, Pb, and Zn) in surface water and sediments, along with physicochemical and microbiological parameters, across 11 stations in the Coata River Basin (Puno, Peru). Dissolved arsenic exceeded the WHO guideline (0.01 mg L?¹) at 10 of 11 stations. In sediments, mean Zn (337.9-400.5 mg kg?¹), Pb (67.7-81.2 mg kg?¹), and As (41.9-43.3 mg kg?¹) surpassed the Threshold Effect Level at every site. Cadmium contamination factors reached very high values (CF up to 15.67), and the geo-accumulation index classified several stations as strongly to extremely polluted (I_geo up to 3.38). The potential ecological risk index ranged from 111.8 to 627.1, with station P-6 reaching very high risk during the dry season. The Torococha–Coata confluence (P-7) emerged as the most degraded reach, with dissolved oxygen of 0.52 mg L?¹ and total coliforms of 1.4 × 10? MPN 100 mL?¹. Sediment contamination intensified during the dry season due to reduced dilution. Mining waste, untreated effluents from Juliaca, and agricultural runoff were identified as the principal contamination sources. Building on this diagnosis, this study proposes a prioritized, phased management strategy coupling source control of mining and urban effluents, sediment-focused remediation at hotspots, and permanent seasonal monitoring to guide near-term pollution mitigation in the basin.

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