Significance of silica in identifying the processes affecting groundwater chemistry in parts of Kali watershed, Central Ganga Plain, India

Khan, Arshi; Umar, Rashid; Khan, Haris Hasan

doi:10.1007/s13201-014-0164-z

Cited by 27 publications

(6 citation statements)

References 6 publications

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“…In the experiment, the concentrations of dissolved Si (DSi) (monosilicic acid + polysilicic acid) in supply water sources were 533.1 µmol (groundwater, Farm 1), 110.0 µmol (fresh water canal, Farm 2) and 57.53 µmol (sea water, Farm 3). This data is consistent with reported DSi concentrations in groundwater (Khan et al 2015), surface terrestrial waters (Zhang et al 2015), and ocean water (Zhao et al 2000;Wei et al 2015).…”

Section: Discussionsupporting

confidence: 91%

Microbial Growth in Shrimp Ponds as Influenced by Monosilicic and Polysilicic Acids

Zhang¹,

Bocharnikova

Matichenkov

2022

Silicon

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In order to increase shrimp production and minimize detrimental environmental impacts of aquaculture, the maintenance and regulation of the growth and composition of phytoplankton communities and nutritional balance are critical. Silicon (Si) is an essential nutrient for diatoms and other types of microorganisms, but the information about the Si impact on their growth is extremely scarce. Monosilicic and polysilicic acids were tested in several shrimp cultivation systems in Jiangsu Province, China. In pond waters, the concentrations of monosilicic and polysilicic acids sharply reduced by 36-95% and 35-75%, accordingly, as compared with those in supply water sources. The microbial cell abundance was strongly dependent on monosilicic acid, while the correlation with polysilicic acid was absent. In laboratory experiments, monosilicic acid added to pond water or probiotic solution at 1 and 2 mM Si had a signi cant positive effect on cell abundance. Over three days, the concentrations of monosilicic acid decreased by 81 to 91% in pond water and by 11 to 24% in probiotic solution. In probiotic solutions, the degree of polymerization of silicic acid was more intensive than that in shrimp pond waters. The data obtained demonstrates the importance of systematic studies related to the functions of Si in shrimp aquaculture.

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Section: Discussionsupporting

confidence: 91%

Microbial Growth in Shrimp Ponds as Influenced by Monosilicic and Polysilicic Acids

Zhang¹,

Bocharnikova

Matichenkov

2022

Silicon

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“…Silica content is also directly proportional to groundwater residence times within the rocks in the aquifer (Pradeep et al, 2016). This is often reflected in deeper-sourced groundwater over shallow-sourced water (Khan et al, 2015). This seems to be the case in Faga'alu, as the highest concentration of Si(OH) 4 was found in the well (FG-179), which is sourced from the deepest groundwater in the study.…”

Section: Phosphate and Silicatementioning

confidence: 79%

Submarine Groundwater Discharge and Stream Baseflow Sustain Pesticide and Nutrient Fluxes in Faga'alu Bay, American Samoa

Welch

Dulai

El‐Kadi

et al. 2019

Front. Environ. Sci.

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It is increasingly recognized that groundwater discharge in the form of stream baseflow and submarine groundwater discharge (SGD) plays an important role in contaminant transport. This study seeks to demonstrate the importance of groundwater flow for the distribution and transport of selected pesticides and nutrients in the Faga'alu aquifer on the island of Tutuila in American Samoa. Field measurements, including seepage runs and analysis of stream and groundwater for pesticides and nutrients, were combined with hydrological modeling. Selected analytes were glyphosate (GLY), dichlorodiphenyl-trichloroethane (DDT), imidacloprid, and azoxystrobin for pesticides and chemical species of nitrogen, phosphate, and silicate for nutrients. Hydrological flow and transport models of the aquifer were built to simulate groundwater flow and to provide estimates of GLY and dissolved inorganic nitrogen (DIN) fluxes. Stream baseflow was responsible for 59% and SGD for 41% of groundwater flow to the bay, which totaled 6,550 ± 980 m 3 /d in the dry season when surface runoff was negligible. DDT was found in 85% and GLY in 100% of tested samples. SGD and baseflow thus delivered 9 ± 2 g/d of DDT, 0.9 ± 0.2 g/d of GLY, 570 ± 100 g/d of DIN and 840 ± 110 g/d of dissolved inorganic phosphorus (DIP) into Faga'alu Bay. While all pesticide levels are below environmental limits, their presence in baseflow and SGD, which discharge continuously year-round, result in sustained fluxes of GLY and DDT to the reef. The presence of DDT in groundwater decades after its last application confirms its long-term environmental persistence.

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“…The physical modification significantly influences the further process of ROS generation. − We rationalize that the conventional thermodynamics of the bubble collapse phenomenon led to ozone breakdown. Furthermore, this process comprises three sequential stages, namely, initiation, propagation, and termination.…”

Section: Resultsmentioning

confidence: 80%

“…Notably, aside from titanium (Ti) and aluminum (Al) present in the membrane material itself, certain elements, namely, Zr, Mn, Ca, and Ni, exhibited a strong association with the foulant. Additionally, silicon (Si), a common microelement in water, particularly in groundwater, was also detected in this analysis. − Furthermore, the crucial constituents that are responsible for fouling are successfully demonstrated via subsequent reduction in the cleaning procedure, thereby indicating the successful efficacy of the cleaning process in mitigating foulant accumulation. Alongside the decrease in the weight percentages of foulants, the membrane components also exhibited an augmentation.…”

Section: Resultsmentioning

confidence: 83%

High Recovery of Ceramic Membrane Cleaning Remediation by Ozone Nanobubble Technology

Rafryanto,

Ramadina,

Nur’aini

et al. 2024

ACS Omega

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The persistent issue of ceramic membrane fouling poses significant challenges to its widespread implementation. To address this concern, ozone nanobubbles (ozone-NBs) have garnered attention due to their remarkable mass transfer efficiency. In this investigation, we present a novel ozone-NB generator system to effectively clean a fouled ceramic membrane that is typically employed in the dye industry. The surface characteristics of the ceramic membrane underwent significant alterations, manifesting incremental changes in surface roughness and foulant accumulation reduction, as evidenced in atomic force microscopy, scanning electron microscopy, X-ray fluorescence, and energy-dispersive spectroscopy. Remarkably, the sequential 4 h cleaning process demonstrates an effective outcome leading to an almost 2-fold enhancement in the membrane flux. The initial fouled state of 608 L/ h/m 2 increased to 1050 L/h/m 2 in the 4 h state with a recovery of 50%. We propose such membrane performance improvement governed by the ozone-NBs with a size distribution of 213.2 nm and a zeta potential value of −20.26 ± 0.13 mV, respectively. This effort showcases a substantial innovative and sustainable technology approach toward proficient foulant removal in water treatment applications.

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Significance of silica in identifying the processes affecting groundwater chemistry in parts of Kali watershed, Central Ganga Plain, India

Cited by 27 publications

References 6 publications

Microbial Growth in Shrimp Ponds as Influenced by Monosilicic and Polysilicic Acids

Microbial Growth in Shrimp Ponds as Influenced by Monosilicic and Polysilicic Acids

Submarine Groundwater Discharge and Stream Baseflow Sustain Pesticide and Nutrient Fluxes in Faga'alu Bay, American Samoa

High Recovery of Ceramic Membrane Cleaning Remediation by Ozone Nanobubble Technology

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