Abstract
Chromium (Cr) enters into the environment through activities related to mining, various industrial and certain geological processes. Globally more than 170,000 tons of chromium - containing wastewater is discharged annually. Chromium is toxic for all living organisms, therefore, its removal is crucial to save plants and aquatic life. Due to its toxic and carcinogenic nature, efficient removal technologies and materials are continuously investigated and widely documented. This chapter focuses on recent technologies and materials employed to remove chromium from water bodies. Techniques such as membrane filtration, electrochemical, and phytoremediation have emerged over the years. Sorptive removal of chromium is another approach that is investigated in detail for the development of efficient sorbent materials. Many natural and synthetic materials, such as carbon nanotubes, composite of nanomaterials, zeolites, biochar and others are reported as sorbents. Electrochemical precipitation has superseded conventional coagulation technology in terms of efficiency. However, it still requires investigation for industrial scale utilization and also, like all precipitation techniques, it produces chromium-containing sludge. On the other hand, functionalized materials with high surface area are promising candidates as sorbents.
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Abbreviations
- CNTs:
-
Carbon Nanotubes
- APTS:
-
3-aminopropyl-triethoxysilane
- PVDF:
-
Poly (vinylidene fluoride)
- DMAc:
-
Dimethylacetamide
- PVP:
-
Polyvinyl pyrrolidone
- ECP:
-
Electrochemical precipitation
- COD:
-
Chemical oxygen demand
- TSS:
-
Total suspended solids
- SWCNT:
-
Single walled carbon nanotubes
- PEUF:
-
Polymer-enhanced ultrafiltration
- MWCNT:
-
Multi walled carbon nanotubes
- BET:
-
Brunauer, Emmett and Teller
- PDMAEMA:
-
poly(2-dimethylaminoethyl methacrylate)
- TA:
-
Tataric acid
- GAC:
-
Green Macroalgae Cladophore
- AC:
-
Activated carbon
- PPy:
-
Polypyrrole
- GO:
-
Graphene oxide
- LDHs:
-
Layered Double Hydroxides
- CRIS:
-
Constructed rapid infiltration systems
- PEG:
-
Polyethylene glycol
- SLM:
-
Supported liquid membrane
- NF:
-
Nano-filtration
- CPC:
-
Cetylpyridinium chloride
- NAD(P)H:
-
Nicotinamide adenine dinucleotide phosphate
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Financial support from Pak-US Science and Technology Cooperation Program, Phase VI (Project No. 6/6/PAK-US/HEC/2015/06) is highly acknowledged.
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Hussain, F.S., Memon, N. (2020). Materials and Technologies for the Removal of Chromium from Aqueous Systems. In: Lichtfouse, E. (eds) Sustainable Agriculture Reviews 40. Sustainable Agriculture Reviews, vol 40. Springer, Cham. https://doi.org/10.1007/978-3-030-33281-5_4
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