Assessment of Wastewater Contaminants Retention for a Soil-aquifer Treatment System Using Soil-column Experiments

Martins, T.; Leitão, T. E.; Carvalho, Rejane Andrade de

doi:10.1016/j.proeps.2016.12.084

Cited by 9 publications

(8 citation statements)

References 1 publication

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“…It is an important method to study migration and state transformation of pollutants in soil and groundwater. It is widely used in research fields such as water conservancy, agriculture and soil science [ 40 , 41 , 42 ].…”

Section: Methodsmentioning

confidence: 99%

Fly Ash Modified Coalmine Solid Wastes for Stabilization of Trace Metals in Mining Damaged Land Reclamation: A Case Study in Xuzhou Coalmine Area

Huang

Wang²,

et al. 2018

IJERPH

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In China, coalmine wastes, such as gangues, are used for reclamation of mining subsided land. However, as waste rocks, gangues contain several trace metal elements, which could be released under natural weathering and hydrodynamic leaching effects and then migrate into the reclamed soil layer. However, it is very difficult to find adequate other backfill materials for substitution of gangues. In this paper, we present a novel method and case study to restrict the migration ability of trace metal elements in gangues by using another kind of coalmine solid waste—fly ashes from coal combustion. In this study, fly ashes were mixed with gangues in different mass proportions 1:0.2, 1:0.4, 1:0.6 and 1:0.8 as new designed backfill materials. Due to the help of fly ash, the occurrence states of studied trace metal elements were greatly changed, and their releasing and migration ability under hydrodynamic leaching effect were also significantly restricted. In this research seven trace metal elements in gangues Cu, Zn, Pb, Cd, Cr, Mn and Ni were studied by using soil column hydrodynamical leaching method and simulated precipitation for one year. The results show that under the driving of natural precipitation trace metal elements were generally transported deep inside the reconstructed land base, i.e., far away from soil layer and most of the trace metal elements were transformed into a bonded state, or combined in inert occurrence states, especially the residual state. With this method, the migration activities of tested trace metal elements were greatly restricted and the environmental potential risk could be significantly reduced.

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Section: Methodsmentioning

confidence: 99%

Fly Ash Modified Coalmine Solid Wastes for Stabilization of Trace Metals in Mining Damaged Land Reclamation: A Case Study in Xuzhou Coalmine Area

Huang

Wang²,

et al. 2018

IJERPH

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“…This method is quite useful for water management systems, mainly in semi-arid regions. This is a very simple method, low cost, and reduces environmental problems [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Wastewater Pollutants Retaining for a Soil Aquifer Treatment using Batch Column Experiments

Raji

Packialakshmi²

2022

Civ Eng J

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In this study, the Secondary Treated Waste-Water (STWW) to infiltrate through the soil matrix, hence eliminating the contaminants in the effluent. For this study, three types of soil, such as loamy sand, fine sand, and clayey soil, were subjected to two cycles of wetting and drying to assess the type of soil that removes the maximum contaminants under which cycle. At diverse locations, soil samples were collected and examined to determine the soil types. Likewise, STWW was collected from Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) and Perungudi Sewage Treatment Plant (PSTP) to illustrate the quality of water before Soil Aquifer Treatment (SAT). About 1.5 m in height and 8 mm in diameter of fabricated acrylic material columns are used for the soil aquifer treatment efficiency studies. Water quality parameters, namely pH, TDS, and turbidity, were monitored throughout the study. All the organic compounds present in water were reduced to a higher level only in the fine sand in the one-day wetting/drying cycle. pH was reduced from 8.55 to 7.5, TDS was reduced from 1580 mg/l to 850 mg/l, and Turbidity was reduced from 7.24 to 4.04 NTU. This proposed method is to minimize the amount of water pollution from the environment. It is an effective way to manage aquifer recharge (MAR). SAT is the easiest method, aquifer and/or soil-based treatment systems improve the effluent quality of wastewater by removing the trace elements in the aquifer during the recharge of groundwater. It is likewise attractive for technologically advanced as well as emerging countries, and it is supple enough to allow adaptation to home-grown requirements by uniting it with predictable natural or bringing about water and technologies of wastewater treatment. Doi: 10.28991/CEJ-2022-08-07-011 Full Text: PDF

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“…On the other hand, the disposal of the treated wastewater effluent takes place by direct infiltration into the soil by means of infiltration elements such as soakaways, trenches, drainage pipes or swales (Sieker, 1998;Shuster et al, 2010). Here, the quality of treated wastewater effluent can be improved before reaching the aquifer by the processes of filtration, absorption and biodegradation in the aerated unsaturated soil zone (Martins et al, 2017;Morales et al, 2016;Nema et al, 2001, Reemtsma et al, 2000Zhang et al, 2007). However, using the treated wastewater harbours risks, because pollutants can reach the aquifer (Bekele et al, 2018;Burger and Čelková, 2005).…”

Section: Introductionmentioning

confidence: 99%

Estimation of limitations for groundwater recharge using the example of the Sarden site in Syria

Aldarir¹,

Fichtner²,

Gwiadowski³

et al. 2022

AHS

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Groundwater is the main source of all renewable water resources for drinking and irrigation water in most arid and semiarid areas. However, groundwater abstraction by pumping has increased in most areas significantly, leading to a lowering of the groundwater level. Managed aquifer recharge is a measure to prevent or counteract these temporary and permanent groundwater declines and their negative effects. The work described here deals with the numerical simulation of treated wastewater infiltration for improving the local groundwater balance in the catchment area of Sarden village, Syria. The semi-arid region is characterized by shallow silty clay soils, limestone cliffs and karst aquifers. Different model setups were built up by means of the software PCSiWaPro simulating the effects of different boundary conditions on the saturation conditions in the vadose zone. This should enable an initial assessment of whether and under what conditions the installation of an infiltration system is possible. Results of the research are showing that the hydraulic conditions in the unsaturated soil zone at the site are influenced most by the groundwater level and the number of trenches used for infiltration, whereas precipitation events are playing a subordinate role. In case of elevated groundwater level and too low number of infiltration trenches, the water can rise up to or in the infiltration trenches.

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Assessment of Wastewater Contaminants Retention for a Soil-aquifer Treatment System Using Soil-column Experiments

Cited by 9 publications

References 1 publication

Fly Ash Modified Coalmine Solid Wastes for Stabilization of Trace Metals in Mining Damaged Land Reclamation: A Case Study in Xuzhou Coalmine Area

Fly Ash Modified Coalmine Solid Wastes for Stabilization of Trace Metals in Mining Damaged Land Reclamation: A Case Study in Xuzhou Coalmine Area

Assessing the Wastewater Pollutants Retaining for a Soil Aquifer Treatment using Batch Column Experiments

Estimation of limitations for groundwater recharge using the example of the Sarden site in Syria

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