Abstract
<p>Post-mining land management needs to be done by taking into account a holistic approach concerning the improvement of physical, chemical and biological properties of soil as growth media, in order to support the rehabilitation plans. The objective of this study were: (i) to conduct quantitative and comprehensive an inventory of pedological properties of nickel post mining land, (ii) to analyze the potential and limitations of post mined land, (iii) act designed environmental management, based on the characteristics of the revegetation of the land and the environment. The results showed that the soil in Pomalaa could be classified in Typic Hapludox, clayey, mixed, isohypertermic (P1) dan Typic Hapludalfs, loamy, mixed, isohypertermic (P2), while the material in ex mining area are overburden or parent material. The soil has developed from peridotite and peridotite-serpentinite ultramafic material. This soil has low natural fertility and require efforts to improve the physical properties. Ex-mining area has a high rate of erosion. Poor tree growth in revegetation area has been determined caused by a deficiency of Ca, Fe, Cu, or Mn. The possibility of Ni and Cr toxicity in plants needs to be further investigated. Local resources in the form of slag can be used for revegetation, especially converter slag. The results obtained from this study can be used to give the advice of post-nickel mining land management, based on land characteristics. A better management advice covers two issues, namely improvements of the management action actually implemented and improvements in technical rehabilitation.<br />Keywords: Pedological processes, post nickel mining land, revegetation</p>
Highlights
Post-mining land management needs to be done by taking into account a holistic approach concerning the improvement of physical, chemical and biological properties of soil as growth media, in order to support the rehabilitation plans
The results showed that the soil in Pomalaa could be classified in Typic Hapludox, clayey, mixed, isohypertermic (P1) dan Typic Hapludalfs, loamy, mixed, isohypertermic (P2), while the material in ex mining area are overburden or parent material
Second Asean Soil Conf., 1:383 – 392
Summary
Pertambangan merupakan usaha pemanfaatan sumber daya alam bahan galian yang menyebabkan teraduknya lahan yang disingkap, utamanya dalam sistem penambangan terbuka. Karena metodanya membuka lapisan atas tanah ketika penambangan bahan galian dilakukan, pengelolaan perlu direncanakan dengan baik agar lingkungan dan sumber daya alam lainnya tidak terganggu. Penelitian lapang meliputi pengamatan morfologi tanah dan pengambilan sampel yang meliputi sampel tanah profil, sampel tanah komposit, sampel mineralogi tanah, sampel fisika tanah, sampel tanaman dan sampel terak nikel (slag). Sampel tanah diambil pada tanah virgin (tidak ditambang) dan tanah bekas tambang, baik yang ditanami (revegetasi) maupun yang tanamannya tumbuh secara alamiah. Analisis dilakukan terhadap 3 profil (12 sampel), 40 sampel komposit, 6 sampel mineral fraksi pasir, 6 sampel mineral fraksi liat, 14 sampel fisika tanah, 10 sampel tanaman dan 4 sampel terak nikel. P3 berada di bukit, pada lokasi bekas tambang
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