Removal of heavy metal ions using a carboxylated graphene oxide-incorporated polyphenylsulfone nanofiltration membrane

Shukla, Arun Kumar; Alam, Javed; Alhoshan, Mansour; Dass, Lawrence Arockiasamy; Ali, Fekri Abdulraqeb Ahmed; Muthuramamoorthy, Muthumareeswaran; Mishra, Umesh; Ansari, Mohammad Azam

doi:10.1039/c7ew00506g

Cited by 87 publications

(42 citation statements)

References 57 publications

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“…Cu 2+ , Cd 2+ and Pb 2+ are commonly presented in industrial-polluted waters and all pose various threats to human body. Cd 2+ accumulation results in lung cancer, proteinuria and osteomalacia after long-term absorption 28,32 . Excessive Pb 2+ intake causes encephalopathy, inanemia, and nephropathy 33,34 .…”

Section: Heavy Metal Removalmentioning

confidence: 99%

Zeolite Cotton in Tube: A Simple Robust Household Water Treatment Filter for Heavy Metal Removal

Chen

Zou

et al. 2020

Sci Rep

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it is challenging to develop a low-cost household water treatment (HWt) that simultaneously deliver an effective and robust way for safe and reliable water supply. Here, we report a simple flow-through filter made by zeolite-cotton packing in a tube (Zct) as low-cost HWt device to remove heavy metal ions from contaminated water. The zeolite-cotton is fabricated by an on-site template-free growth route that tightly binds mesoporous single-crystal chabazite zeolite onto the surface of cotton fibers. As a result, the ZCT set-up with optimized diameter achieves both high adsorption efficiency, proper flow rate, reliable supply and strong stability at the same time. After flowed through the set up packed with 10 g of zeolite-cotton, 65 mL 1000 ppm Cu 2+ solution was purified down to its safety limit (<1 ppm). Notably, their efficiency remains unaltered when filtering several ions simultaneously. In a simulated purification process, 8 L of water contaminated by Cu 2+ , cd 2+ and pb 2+ could be transformed into drinking water and it enables the removal of heavy metals to concentrations of below 5 ppb (μg L −1 ). We also show that the Zct can be used for disinfection by introducing Ag-exchanged zeolite-cotton without contaminating the water with Ag ions (<0.05 ppm).Drinking water safety is one of the most serious health problems throughout the world, especially for those people in relatively undeveloped districts. Health risks may arise from consumption of water contaminated with numerous pollutants such as heavy metal ions, persistent organic pollutants, pharmaceutical waste, virus and microbial pathegens 1 . As reported by World Health Organization (WHO), nearly 2 billion people are using either un-improved drinking water source or faecally-contaminated water. Close to half a million diarrheal deaths in low-and middle-income countries are attributed to unsafe drinking-water, and the vast majority of these deaths occur among children under five 2 . Household water treatment (HWT) is an important public health intervention to improve the quality of drinking-water, particularly among those who rely on water from unimproved sources. Further, safe drinking-water is an immediate priority in most emergencies, and HWT can be an effective emergency response intervention 3,4 , for example, the project solar disinfection (SODIS) of drinking water 5-8 , which is awarded the 2020 UNESCO Prizes, is an important HWT technique approved by WHO.Unlike organic pollutants, heavy metal ions in water is hard to notice and avoid but pose a long-term threat to human. Heavy metal contaminated water usually has no visible difference as compared to safe drinking water, however, every little intake will not degrade but accumulate in human body. Even if the heavy metal-polluted water is not directly taken by human, it can also accumulate in algae, shellfish and fish, then concentrate through food chain and finally result in serious disease such as encephalopathy, hemolytic anemia or even cancer 9-11 . Those global issues have reminded people to se...

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Section: Heavy Metal Removalmentioning

confidence: 99%

Zeolite Cotton in Tube: A Simple Robust Household Water Treatment Filter for Heavy Metal Removal

Chen

Zou

et al. 2020

Sci Rep

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“…has demonstrated the selective rejection of multivalent ions at exceedingly low pressures, showing that advanced NF membranes may be useful for removing scalants from the feed stream without the precipitation step. Additionally, carbon nanotube composite and graphene oxide‐incorporated polymeric membranes have been shown to exhibit greater mechanical stability and ability to purify water . In conjunction with different composite materials, others have improved the performance of nanofiltration by exploring different strategies to modify the surface of nanofiltration membranes, which range from rapid co‐deposition of polymers to in situ surface reactions to inkjet printing …”

Section: Membrane‐based Pretreatment Processes For Brine Valorizationmentioning

confidence: 99%

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

et al. 2019

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The rising use of seawater desalination for fresh water production is driving a parallel rise in the discharge of high‐salinity brine into the ocean. Better utilization of this brine would have a positive impact on the energy use, cost, and environmental footprint of desalination. Furthermore, intermittent renewable energy can easily power the brine utilization and, for reverse osmosis technology, the entire desalination plant. One pathway toward these goals is to convert the otherwise discharged brine into useful chemicals; waste could be transformed into sodium hydroxide or caustic soda (NaOH) and hydrochloric acid (HCl). In this Minireview, we discuss opportunities and challenges for integrated valorization of desalination brine through NaOH and HCl recovery.

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“…[12] If the concentration of divalent ions,s pecifically Ca 2+ the attachment of inorganic precipitates onto the membrane, causes deterioration of membrane performance and increased energy consumption. [18][19][20] In conjunction with different composite materials,o thers have improved the performance of nanofiltration by exploring different strategies to modify the surface of nanofiltration membranes, [18][19][20][21] which range from rapid co-deposition of polymers [21] to in situ surface reactions [18] to inkjet printing. A common method of removing Ca 2+ and Mg 2+ through precipitation is the use of sodium carbonate (Na 2 CO 3 )a nd NaOH to produce calcium carbonate (CaCO 3 )a nd magnesium hydroxide (Mg(OH) 2 )salts,which can remove up to 96 and 99 %o fc alcium and magnesium ions,r espectively,f rom the NF permeate.…”

Section: Nanofiltrationmentioning

confidence: 99%

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

et al. 2019

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Removal of heavy metal ions using a carboxylated graphene oxide-incorporated polyphenylsulfone nanofiltration membrane

Abstract: We investigate the removal of heavy metal ions from synthetic contaminated water on a laboratory scale using a carboxylated-graphene oxide (GO)-incorporated polyphenylsulfone (PPSU) nanofiltration membrane (the so called PPSU/carboxylated-GO nanocomposite membrane).

Cited by 87 publications

References 57 publications

Zeolite Cotton in Tube: A Simple Robust Household Water Treatment Filter for Heavy Metal Removal

Zeolite Cotton in Tube: A Simple Robust Household Water Treatment Filter for Heavy Metal Removal

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

Integrated Valorization of Desalination Brine through NaOH Recovery: Opportunities and Challenges

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