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Advanced Technologies for Water/Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (30 July 2023) | Viewed by 5072

Special Issue Editor


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Guest Editor
Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi 835215, Jharkhand, India
Interests: water/wastewater treatment; coagulation; flocculation; electrocoagulation; membrane filtration; adsorption; photocatalysis; nanocomposites for water treatment; hydrogels; water filters; desalination; metal–organic frameworks; graft copolymers; inorganic coagulants; hybrid materials; zeolites; biochar; nanomaterials; mesoporous materials; ion exchange; superabsorbents; dye removal; metal contamination; microplastics; sustainable water management; circular economy

Special Issue Information

Dear Colleagues,

Water and wastewater treatment is one of the primary focuses of any economy. The existing methods of water treatment, such as conventional coagulation, flocculation, sand filters, membrane filtration, etc., are being widely used, but as lifestyle and industrial enterprises are changing, new and emerging contaminants are also becoming prevalent. To tackle this unending load of conventional pollutants and new contaminants such as pesticides, drugs, microplastics, and others, we need new materials and techniques or a combination of techniques. Advanced materials may be new flocculants, coagulants, membranes, metal–organic hybrid materials, hydrogels, or any other material reported to efficiently remove water/wastewater contamination. Advanced technologies may include membrane filtration, coagulation, flocculation, electrocoagulation, desalination, or any other such technique applicable for selective or overall pollutant load reduction from water/wastewater systems. They may also include water filters, recycling, and any process or technology which may be helpful in addressing water/wastewater treatment issues.

Dr. Sumit Mishra
Guest Editor

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Keywords

  • water/wastewater treatment
  • coagulation
  • flocculation
  • electrocoagulation
  • membrane filtration
  • adsorption
  • photocatalysis
  • nanocomposites for water treatment
  • hydrogels
  • water filters
  • desalination
  • metal–organic frameworks
  • graft copolymers
  • inorganic coagulants
  • hybrid materials
  • zeolites
  • biochar
  • nanomaterials
  • mesoporous materials
  • ion exchange
  • superabsorbents
  • dye removal
  • metal contamination
  • microplastics
  • sustainable water management
  • circular economy

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Published Papers (1 paper)

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Research

11 pages, 2176 KiB  
Article
Modifying Natural Zeolites to Improve Heavy Metal Adsorption
by Erzhan Kuldeyev, Makpal Seitzhanova, Sandugash Tanirbergenova, Kairat Tazhu, Erlan Doszhanov, Zulkhair Mansurov, Seitkhan Azat, Ruslan Nurlybaev and Ronny Berndtsson
Water 2023, 15(12), 2215; https://doi.org/10.3390/w15122215 - 12 Jun 2023
Cited by 20 | Viewed by 4515
Abstract
Problems with increasing heavy metal contents in natural waters are becoming a global issue. At the same time, improved methods for water treatment are becoming increasingly important. In this context, natural zeolites can be used to purify polluted water. In this paper, we [...] Read more.
Problems with increasing heavy metal contents in natural waters are becoming a global issue. At the same time, improved methods for water treatment are becoming increasingly important. In this context, natural zeolites can be used to purify polluted water. In this paper, we investigated how the adsorption capacity of natural zeolites can be improved. Natural zeolites from the Shankanay district, Almaty, Kazakhstan, were used as adsorbent material for experiments on improving the water treatment of heavy metals. We found that the adsorption capacity for heavy metals was increased greatly by thermal activation using furnace treatment. The optimal thermal activation condition was about 550 °C for a duration of 2 h. However, the improved adsorption capacity for different heavy metals varied depending on the heat treatment temperature. Adsorption by the heat-treated zeolites at a temperature of 550 °C was 87% for nickel, 99% for copper and cadmium, and 100% for lead. Adsorption by heat-treated zeolites at a temperature of 500 °C was 78% for nickel, 98% for copper, 83% for cadmium, and 88% for lead. The residual concentration of heavy metals in the filtered water did not exceed the maximum permissible concentrations for drinking purposes. In all experiments, intense adsorption took place during the first 10 min representing 35 to 61% of the metal ions in the water. Adsorption properties were verified using adsorption capacity (BET), IR spectroscopy, and scanning electron microscopy. The study shows that modified Shankanay natural zeolites have great potential as a low-cost adsorbent material for purifying water from heavy metals. Full article
(This article belongs to the Special Issue Advanced Technologies for Water/Wastewater Treatment)
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