Treatment of pesticide contaminated surface water for production of potable water by a coagulation-adsorption-nanofiltration approach

Sarkar, Baisali; Venkateswralu, N.; Rao, R. Nageswara; Bhattacharjee, Chiranjib; Kale, Vijay

doi:10.1016/j.desal.2006.09.021

Cited by 98 publications

(49 citation statements)

References 38 publications

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“…The most influential factors includes pH, coexisting ions, and nitrate concentrations [148,149]. Recently, there have been numerous technological developments with nanomaterials, such as nanofiltration [128,129] Fe-Ni chlorinated ethenes [130,131] Fe-Ag chlorobenzene [132] Fe 2 O 3 polyhalogenated methanes, carbon monoxide [125,133] technique, coagulation-adsorption-nanofiltration approach [150], and nanofiltration-complexation process [151,152].…”

Section: Nanomembranes For Treatment Of Water and Wastesmentioning

confidence: 99%

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Shan

Surampalli²,

Tyagi

et al. 2009

Front. Environ. Sci. Eng. China

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Nanomaterials are applicable in the areas of reduction of environmental burden, reduction/treatment of industrial and agricultural wastes, and nonpoint source (NPS) pollution control. First, environmental burden reduction involves green process and engineering, emissions control, desulfurization/denitrification of nonrenewable energy sources, and improvement of agriculture and food systems. Second, reduction/treatment of industrial and agricultural wastes involves converting wastes into products, groundwater remediation, adsorption, delaying photocatalysis, and nanomembranes. Third, NPS pollution control involves controlling water pollution. Nanomaterials alter physical properties on a nanoscale due to their high specific surface area to volume ratio. They are used as catalysts, adsorbents, membranes, and additives to increase activity and capability due to their high specific surface areas and nano-sized effects. Thus, nanomaterials are more effective at treating environmental wastes because they reduce the amount of material needed.

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Section: Nanomembranes For Treatment Of Water and Wastesmentioning

confidence: 99%

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Shan

Surampalli²,

Tyagi

et al. 2009

Front. Environ. Sci. Eng. China

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“…The Conductivity of the raw water was low and hence the low value of the total dissolved solid (TDS). This means the water is of low ionic strength [15]. The sand filtration process increased the TDS and turbidity.…”

Section: Process Watermentioning

confidence: 99%

Membrane Selection for Organic Contaminants Removal From Hartbeespoort Dam Water in South Africa

Adeniyi¹,

Mbaya²,

Popoola³

et al. 2017

WIT Transactions on Ecology and the Environment

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Membrane filtration of raw water obtained from Hartbeespoort dam in South Africa and spiked with four different organochlorides pesticides and three polyaromatic hydrocarbons was done using three different commercially available membranes (AFC 40, AFC80 and AFC99). The purpose was to determine important membrane characteristics for removal of organic contaminants and enhance water recovery. AFC40, a nanofiltration membrane, showed a modular structure, has 2.9% porosity and average roughness 0.76. AFC80, a reverse osmosis membrane, showed little modular structure, has 2.9% porosity and average roughness 0.79. AFC99, another reverse osmosis membrane was tight and showed no nodular structure, percentage porosity was 0.2 while average roughness was 0.67. All the membranes are hydrophilic and gave more than 99% rejection of organic solutes however water recovery was higher with AFC40 which is more hydrophilic (Contact angle 30°-40°) and lowest with AFC99 which is less hydrophilic (Contact angle 40°-63°). EDX results showed that AFC99 has the lowest sodium and sulphur contents. This may have contributed to the absence of modular structure, lower hydrophilicity, and its tightness. The FTIR analysis of the membranes indicated a significant presence of amides group (peak at 1650cm -1 ) and acyl and phenyl C-O groups in all the membranes (peak at 1150 cm -1 ). The presence of ortho disubstituted aromatic group (peak at 74 cm -1 ) was observed in both AFC40 and AFC80 but not in AFC99. This is suspected to have contributed to the tight structure of AFC99. AFC40 had little effect on the conductivity of the feed water. Membranes with higher nodular structure have a higher porosity. The presence of nodular structure increases water recovery but also allows the passage of some dissolved solids, and is therefore important in the selection of membranes for organic contaminants removal from hartbeespoort dam water.

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“…As shown in this figure, the reduction of COD is significant and the amount of COD is reduced from 70 to below 8 mg/L at the first level of flow rate. Referring to the reasons mentioned for TDS reduction, increasing both TMP and flow rate causes COD reduction in the permeates; additionally, it has been shown in other researches that COD rejection is increased by increasing the cross-flow velocity (Saitúa et al, 2005;Sarkar et al, 2007). The COD analyzer does not have adequate accuracy for amounts of COD less than 2mg/L, so the curves show unpredictable variations below 2mg/L.…”

Section: Influence Of Tmp and Feed Flow Rate On The Quality Of Wastewmentioning

confidence: 99%

Treatment of welding electrode manufacturing plant wastewater using coagulation/flocculation-nanofiltration as a hybrid process

Golestani

Mousavi

Borghei

2011

Braz. J. Chem. Eng.

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-High water consumption and water scarcity make industrial wastewater reuse necessary, especially in those industries characterized by polluted effluents such as welding electrode manufacturing industries. The present paper investigates the coupling of coagulation-flocculation with nanofiltration (NF) to recycle water and reuse it in the process. First, the effect of different concentrations of a mixture of alum (Al 2 (SO 4 ) 3 .18H 2 O) and ferric chloride (FeCl 3 ) on the pretreatment process was closely studied. Then the NF process was applied for complementary treatment. The NF results show that, by increasing both flow rate and transmembrane pressure (TMP), permeate flux is increased. The NF results also show that the COD value decreases below 2 mg/l, TDS rejection approaches 82%, turbidity decreases below 1 NTU and the hardness is lower than the factory constraint (100 mg/l as CaCO 3 ), allowing the reuse of the treated wastewater in the process.

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Treatment of pesticide contaminated surface water for production of potable water by a coagulation-adsorption-nanofiltration approach

Cited by 98 publications

References 38 publications

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Nanomaterials for environmental burden reduction, waste treatment, and nonpoint source pollution control: a review

Membrane Selection for Organic Contaminants Removal From Hartbeespoort Dam Water in South Africa

Treatment of welding electrode manufacturing plant wastewater using coagulation/flocculation-nanofiltration as a hybrid process

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