Heavy metal sorption properties of magnesium titanate mesoporous nanorods

2015 ◽  
Vol 3 (22) ◽  
pp. 11796-11800 ◽  
Author(s):  
Xueyun Wang ◽  
Jianhua Cai ◽  
Yanjun Zhang ◽  
Lihua Li ◽  
Li Jiang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Heavy Metal ◽  
Surface Area ◽  
Sorption Properties ◽  
Metal Sorption ◽  
Magnesium Titanate ◽  
Molar Ratios ◽  
Adsorption Capacities ◽  
Heavy Metal Sorption

Ti/Mg molar ratios will influence the properties of magnesium titanate nanorods, such as morphology, surface area, crystallinity and crystal structure, and then their adsorption capacities for Pb2+.

scholarly journals Influence of Pyrolysis Temperature on the Heavy Metal Sorption Capacity of Biochar from Poultry Manure

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6566
Author(s):  
Jolanta Sobik-Szołtysek ◽  
Katarzyna Wystalska ◽  
Krystyna Malińska ◽  
Erik Meers
Keyword(s):  
Heavy Metal ◽  
Surface Area ◽  
Pyrolysis Temperature ◽  
Water Solution ◽  
Poultry Manure ◽  
Buffering Capacity ◽  
Sorption Properties ◽  
Metal Sorption ◽  
Mineral Phases ◽  
Heavy Metal Sorption

Sorption properties of various biochars have been extensively investigated by many researchers. One of the parameters that have a significant impact on sorption properties is pyrolysis temperature. This paper presents a study on the effect of pyrolysis temperature (425, 575, 725 °C) on the sorption properties of poultry-manure-derived biochar (BPM). The produced biochars, i.e., BPM425, BPM575 and BPM725, demonstrated specific properties at 425, 525 and 752 °C such as high pH (10.40, 10.65 and 12.45), high ash contents (52.07, 61.74 and 78.38%) and relatively low BET (Brunauer, Emmett and Teller) surface area (11, 17 and 19 m2·g−1). The analysis of the mineral phases of the BPMs confirmed the buffering capacity. The investigated biochars were tested for sorption of Zn, Cd and Pb in mono-, double- and triple-metal batch sorption tests. According to the obtained results, biochar produced at a temperature of 575 °C (BPM575) can function as a sufficient sorbent for the removal of Zn, Cd and Pb from a water solution. The presented results do not confirm the effect of competing metal ions on the sorption efficiency of the selected metals by the investigated biochars. Based on that, the studied biochar sorbents can be used in environments contaminated with many metals.

ASSESSING THE RELATIONS BETWEEN THE SURFACE PROPERTIES OF BIOCHARS AND HEAVY METAL SORPTION

2020 ◽  
Author(s):  
Amy Lam ◽  
◽  
Todd Longbottom ◽  
Nelli K. Bodiford ◽  
Omar R. Harvey
Keyword(s):  
Heavy Metal ◽  
Surface Properties ◽  
Metal Sorption ◽  
Heavy Metal Sorption

scholarly journals Heavy Metal Sorption by Sludge-Derived Biochar with Focus on Pb2+ Sorption Capacity at μg/L Concentrations

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1559
Author(s):  
Ida Sylwan ◽  
Hanna Runtti ◽  
Lena Johansson Westholm ◽  
Henrik Romar ◽  
Eva Thorin
Keyword(s):  
Experimental Data ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Sorption Capacity ◽  
Municipal Wastewater ◽  
Metal Removal ◽  
Metal Exposure ◽  
Isotherm Models ◽  
Metal Sorption ◽  
Heavy Metal Sorption

Municipal wastewater management causes metal exposure to humans and the environment. Targeted metal removal is suggested to reduce metal loads during sludge reuse and release of effluent to receiving waters. Biochar is considered a low-cost sorbent with high sorption capacity for heavy metals. In this study, heavy metal sorption to sludge-derived biochar (SDBC) was investigated through batch experiments and modeling and compared to that of wood-derived biochar (WDBC) and activated carbon (AC). The aim was to investigate the sorption efficiency at metal concentrations comparable to those in municipal wastewater (<1 mg/L), for which experimental data are lacking and isotherm models have not been verified in previous works. Pb2+ removal of up to 83% was demonstrated at concentrations comparable to those in municipal wastewater, at pH 2. SDBC showed superior Pb2+ sorption capacity (maximum ~2 mg/g at pH 2) compared to WDBC and AC (<0 and (3.5 ± 0.4) × 10−3 mg/g, respectively); however, at the lowest concentration investigated (0.005 mg/L), SDBC released Pb2+. The potential risk of release of other heavy metals (i.e., Ni, Cd, Cu, and Zn) needs to be further examined. The sorption capacity of SDBC over a metal concentration span of 0.005–150 mg Pb2+/L could be predicted with the Redlich–Peterson model. It was shown that experimental data at concentrations comparable to those in municipal wastewater are necessary to accurately model and predict the sorption capacity of SDBC at these concentrations.

Heavy metal sorption of compost materials

2007 ◽  
Vol 35 (2) ◽  
pp. 653-656 ◽  
Author(s):  
Noémi Kovács ◽  
György Füleky
Keyword(s):  
Heavy Metal ◽  
Metal Sorption ◽  
Heavy Metal Sorption

scholarly journals Bioflocculant production and heavy metal sorption by metal resistant bacterial isolates from gold mining soil

Chemosphere ◽  
2019 ◽  
Vol 231 ◽  
pp. 113-120 ◽  
Author(s):  
Ayansina Segun Ayangbenro ◽  
Olubukola Oluranti Babalola ◽  
Oluwole Samuel Aremu
Keyword(s):  
Heavy Metal ◽  
Gold Mining ◽  
Metal Sorption ◽  
Bacterial Isolates ◽  
Mining Soil ◽  
Heavy Metal Sorption
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