Sorption of heavy metals on blast furnace sludge

López‐Delgado, Aurora; Perez, Carlos A.; López, Félix A.

doi:10.1016/s0043-1354(97)00304-7

Cited by 138 publications

(45 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a Brazilian soil high in kaolinite and gibbsite, Airoldi and Critter (1997) found ⌬HЊ for Pb ad sorption was Ϫ43.0 kJ mol Ϫ1 (exothermic), c based on the temperature dependence of the Langmuir isotherm. Lopez et al (1995) andLopez Delgado et al (1998) suggested that Pb ad sorption on blast furnace sludge, which was 47% and 34% Fe 2 O 3 and carbon, respectively, occurred at least, in part, via the replacement of Ca (pre sumably cation exchange) and found ⌬HЊ was endothermic. Their value of 26.1 Ϯ 3.1 kJ mol C Ϫ1 is about 10 times greater than our values for Pb/Ca exchange, which were on the order of 2 to 3 kJ mol Ϫ1 (Table 3).…”

Section: Integral Heats Of Adsorptionmentioning

confidence: 99%

HEATS OF K/Ca AND K/Pb EXCHANGE IN TWO TROPICAL SOILS AS MEASURED BY FLOW CALORIMETRY 1

Appel

Rhue²,

Ma³

et al. 2002

Soil Science

View full text Add to dashboard Cite

Flow calorimetry can provide useful information about surface chem ical reactions in soils that cannot be obtained readily by other methods. When flow calorimetry is conducted over a range of surface coverages, different sorption heats can be calculated to yield information about how binding energies vary with coverage, i.e., surface heterogeneity. The purpose of this study was to determine heats of exchange for K/Ca and K/Pb systems using flow calorimetry and to evaluate the degree of sur face heterogeneity with respect to cation exchange. Surface horizon sam ples from a Typic Acrorthox and Typic Tropohumult from Puerto Rico were used. Lead was adsorbed specifically in both soils, but no adsorp tion heat was detected for this reaction in either soil. However, heats as sociated with reversible cation exchange between K and Pb were ob served. Heats for K/Ca exchange were greater than those generated for K/Pb exchange in both soils. Heats of exchange were greater in the Ul tisol than in the Oxisol. The differential heats of exchange were inde pendent of exchange composition for both K/Pb and K/Ca exchange in the Oxisol, indicating that all cation exchange sites were similar energet ically. In the Ultisol, the differential heats of exchange increased as ex changeable K decreased, indicating that the exchange sites were not sim ilar energetically. These differences were attributed to the presence of smectite in the Ultisol, which was able, in part, to collapse when satu rated with K. (Soil Science 2002;167:773-781)

show abstract

Section: Integral Heats Of Adsorptionmentioning

confidence: 99%

HEATS OF K/Ca AND K/Pb EXCHANGE IN TWO TROPICAL SOILS AS MEASURED BY FLOW CALORIMETRY 1

Appel

Rhue²,

Ma³

et al. 2002

Soil Science

View full text Add to dashboard Cite

show abstract

“…Blast furnace sludge has been studied as adsorbent of heavy metals in aqueous effluents [10,11] and as the main material of ceramic particles in filters for wastewater treatment [12].…”

Section: Introductionmentioning

confidence: 99%

Ceramic Tiles Obtained from Clay Mixtures with the Addition of Diverse Metallurgical Wastes

Quaranta¹,

Caligaris²,

Unsen³

et al. 2014

MSCE

View full text Add to dashboard Cite

The generation of industrial residues is unavoidable, but these materials may be recovered, redirecting them toward new production processes, rather than allocating them to the stream of discards. The aim of this paper is to study the feasibility of utilization of metallurgical wastes as raw material for tiles in the ceramic industry, using the residual materials as aggregates in clay based ceramics. The residues used are: sludge and slag from several metallurgical processes, Ruthner dust and foundry sand. Samples were obtained from mixtures of clay and each waste in various percentages, which were then heat treated. The pieces obtained were characterized using several techniques, with the aim of determining the properties of these materials in relation to the commercial requirements. A high feasibility of reuse of most of these wastes as raw material in the production of ceramic bodies has been established.

show abstract

“…In case of Zn 2+ adsorption, however, the high adsorption was poor (9 mgg −1 ). The sorption of some heavy metals on sludge was also studied by L´opez-Delgado et al, [122] who illustrated that metal ions are adsorbed in the order of Pb 2+ >Ni 2+ >Cd 2+ >Cu 2+ >Zn 2+ .…”

Section: Bio-waste Materials As Adsorbent Of Contaminate From Waste Wmentioning

confidence: 96%

Applications of Bio-waste Materials as Green Synthesis of Nanoparticles and Water Purification

Ali¹

2017

View full text Add to dashboard Cite

Towards the future of green, sustainable and renewable products the suggestion of using the agriculture biomass in the coming decades got increased. Biomass material is one of the important sources of alternative material for the production of biocomposite products. An increasing global awareness about environmental issues is acting as the driving force behind the utilization of biomass material as valuable products. Bio-waste materials (agricultural waste) have been recognized as an ecological burden for the society they stimulated new gateways for the production of renewable, low cost and sustainable adsorbents for water treatment applications. In the area of water purification, nanotechnology offers the possibility of an efficient removal of pollutants and bacteria. Adsorption has proved that it is the best process of water treatment technologies, because of its significant advantages. Different modification methods of waste-based adsorbents, have also been presented to highlight and discuss the key advancements on the preparation of novel adsorbents using agricultural "agro-waste". Adsorption mechanisms responsible for pollutants removal by waste-based adsorbents have also been discussed. It also focuses on the computational aspects of binding of biomolecules to nanoparticles (NPs) and some of the applications of the biosynthesized NPs as water purification. The nature acts like a large ''bio-laboratory" comprising of plants, algae, fungi, yeast, etc. which are composed of biomolecules. These naturally occurring biomolecules have been identified to play an active role in the formation of nanoparticles with distinct shapes and sizes thereby acting as a driving force for the designing of greener, safe and environmentally benign protocols for the synthesis of NPs. The biosynthesis of NPs using waste materials will help researchers not only to design safer nanomaterials but also to promote the understanding of health and safety considerations of NPs. Useful materials can be produced easily even at reasonable scale because the biomaterial based routes eliminate the need to use toxic chemicals. The aim of this review is to summarize the adsorption capacities for organic and inorganic pollutants by different bio-waste-based adsorbents.

show abstract

Sorption of heavy metals on blast furnace sludge

Cited by 138 publications

References 12 publications

HEATS OF K/Ca AND K/Pb EXCHANGE IN TWO TROPICAL SOILS AS MEASURED BY FLOW CALORIMETRY 1

HEATS OF K/Ca AND K/Pb EXCHANGE IN TWO TROPICAL SOILS AS MEASURED BY FLOW CALORIMETRY 1

Ceramic Tiles Obtained from Clay Mixtures with the Addition of Diverse Metallurgical Wastes

Applications of Bio-waste Materials as Green Synthesis of Nanoparticles and Water Purification

Contact Info

Product

Resources

About