000			04054ntm a2200337 i 4500
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008			251216t20252025my a|||fr|||| 00| 0 eng d
020			_aTHE0010161 (Local) _qHardback
040			_aUMPSA _beng _cUMPSA _erda
090			_aFTKA .W34 2025 r Thesis
100	1		_aAbdul Wahab _eauthor.
245	1	0	_aRecycling of gold, iron, and bauxite mining tailings under the influence of electrokinetic remediation technique / _cAbdul Wahab
264		1	_aKuantan, Pahang : _bUMPSA, _c2025
264		4	_c© 2025
300			_axxvii, 318 pages : _billustrations (some color) ; _c30 cm. + _e1 CD-ROM
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
347			_2rda _atext file _bPDF
500			_aFaculty of Civil Engineering Technology
502			_aThesis (Doctor of Philosophy in Civil Engineering) -- Universiti Malaysia Pahang Al Sultan Abdullah – 2025
504			_aIncludes bibliographical references
520	3		_aThis study examines the geotechnical and chemical properties of active and abandoned mine tailings, focusing on improving stability and removing heavy metals. In Malaysia, improper disposal of tailings, particularly from abandoned sites, causes soil and water contamination with toxic metals like Lead (Pb), Copper (Cu), Zinc (Zn), and Arsenic (As), posing significant risks to human health and the environment. The lack of effective remediation and the impact of industrialization and deforestation in mining areas further worsen contamination, highlighting the need to address the long-term effects of heavy metals on ecosystems. The electrokinetic stabilization technique (EKS) was applied to enhance shear strength, moisture control, and compaction, while the electrokinetic remediation technique (EKR) was practiced to remove the heavy metals from mining tailings. Tailing samples were sourced from gold, iron ore, and bauxite mines across Pahang, Malaysia. Two samples were taken from each tailing site using GPS for accurate location detection, and ArcGIS was used to map the sampling locations. The geotechnical parameters were analyzed for untreated tailings soil, and pre-elemental analysis, including ICP-OES, was conducted to assess heavy metal concentrations in the mining tailings soil. The EKR experiment was carried out in two phases. In phase I, a 100 V electric gradient was applied using stainless-steel electrodes for 4 hours. In Phase II, a voltage gradient of 150 V was constantly applied for 8 hours. After EKR treatment, elemental analysis and geotechnical assessments were performed on the samples to evaluate heavy metal removal efficiency and improved geotechnical properties. The moisture content was excellently improved, where 39.79%, 50.62% and 55.07% for TCI samples,73.04%, 75.33% and 83.76% for BII, 73.23%, 77.62% and 83.75% for SGM, and 31.11%, 32.21% and 41.59% for BGM samples. The shear strength was improved to 359.6 kPa for TCI tailings samples, 283 kPa for BII tailings samples, 365.8 kPa for SGM tailings samples, and 315.3 kPa for BGM tailings treated samples. An outstanding removal efficiency was observed for arsenic was 80.02% to 86.63%, copper, 67.7% to 92,74%, barium, 70.85% to 91.98%, magnesium, 78.7%, lead, 54.8% to 80.34%, and zinc, 77.87% to 80.54%. Elemental compositions before and after the EKR process were compared using Origin Pro 8.0 software. This research supports the UN Sustainable Development Goals by improving ecosystem health (SDG 3), enhancing water quality through tailings remediation (SDG 6), and promoting sustainable mining and infrastructure (SDGs 9 & 12). Cross-disciplinary collaboration is recommended to scale electrokinetic methods, optimize parameters, monitor treated tailings, and assess health and economic impacts.
610	2	0	_aFaculty of Civil Engineering Technology _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses _xDissertations
942			_2lcc _cTHESIS
999			_c103775 _d103781