Treatment of metal industrial wastewater by fly ash and cement fixation

Journal Article · · Journal of Environmental Engineering (New York); (United States)

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1994)120:6(1470)· OSTI ID:6707559

Weng, C H; Huang, C P ^[1]

---

1. Univ. of Delaware, Newark, DE (United States). Dept. of Civil Engineering

A process for the treatment of industrial wastewater containing heavy metals, using fly ash adsorption and cement fixation of the metal-laden adsorbent, was investigated. Results show that the fly ash can be an effective metal adsorbent, at least for Zn(II) and Cd(II) in dilute industrial wastewaters. Fly ash adsorption capacities for Zn(II) and Cd(II) were 0.27 mg/g and 0.05 mg/g, respectively. A mortar specimen prepared with 10% metal-laden fly ash showed a 56-day strength, about the same or even greater than that of cement alone. Leachates from the fixed metal-laden fly ash, obtained by using both the ASTM and US Environmental Protection Agency-extraction procedure (USEPA-EP) leaching tests, exhibit metal concentrations lower than the drinking water standards. Compressive strength and leaching test results suggest that metal-laden fly ash can be considered for use in secondary construction materials.

• OSTI ID: 6707559
• Journal Information: Journal of Environmental Engineering (New York); (United States), Journal Name: Journal of Environmental Engineering (New York); (United States) Vol. 120:6; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION
AEROSOL WASTES
ASHES
CADMIUM
CHEMICAL EFFLUENTS
CHEMICAL WASTES
COMBUSTION PRODUCTS
ELEMENTS
FLY ASH
HYDROGEN COMPOUNDS
INDUSTRIAL WASTES
LIQUID WASTES
MANAGEMENT
METALS
NONRADIOACTIVE WASTES
OXYGEN COMPOUNDS
PROCESSING
RESIDUES
SORPTION
SORPTIVE PROPERTIES
STABILIZATION
SURFACE PROPERTIES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
ZINC