Effect of H2O2 concentrations on copper removal using the modified hydrothermal biochar

Zuo, Xingtao; Liu, Zhengang; Chen, Mindong

doi:10.1016/j.biortech.2016.02.032

Cited by 106 publications

(32 citation statements)

References 33 publications

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“…Similar results were found in previous researches. 55 The result showed the lower exchangeable Pb and Cd forms corresponding with the higher mass ratios of adsorbents.…”

Section: Effect Of Mass Ratio Of Soil and Adsorbent On Immobilization Of The Exchangeable CD And Pbmentioning

confidence: 93%

Enhancement of exchangeable Cd and Pb immobilization in contaminated soil using Mg/Al LDH-zeolite as an effective adsorbent

Dang

Van²,

Duy

et al. 2021

RSC Adv.

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“…Similar results were found in previous researches. 55 The result showed the lower exchangeable Pb and Cd forms corresponding with the higher mass ratios of adsorbents.…”

Section: Effect Of Mass Ratio Of Soil and Adsorbent On Immobilization Of The Exchangeable CD And Pbmentioning

confidence: 93%

Enhancement of exchangeable Cd and Pb immobilization in contaminated soil using Mg/Al LDH-zeolite as an effective adsorbent

Dang

Van²,

Duy

et al. 2021

RSC Adv.

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“…The commonly used oxidants are HCl, HNO 3 , H 2 O 2 , H 3 PO 4 , etc. [56][57][58][59][60]. Although the specific surface area of biochar modified by HCl, HNO 3 , and H 2 O 2 has little difference, compared with biochar modified by HCl, the biochar modified by HNO 3 contains more acidic oxygen-containing functional groups [61] and has stronger adsorption capacity for NH 3 -N. Compared with other acids, biochar modified by H 3 PO 4 has more advantages in removing Pb pollution.…”

Section: Chemical Oxidationmentioning

confidence: 99%

Preparation and Modification of Biochar Materials and their Application in Soil Remediation

et al. 2019

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As a new functional material, biochar was usually prepared from biomass and solid wastes such as agricultural and forestry waste, sludge, livestock, and poultry manure. The wide application of biochar is due to its abilities to remove pollutants, remediate contaminated soil, and reduce greenhouse gas emissions. In this paper, the influence of preparation methods, process parameters, and modification methods on the physicochemical properties of biochar were discussed, as well as the mechanisms of biochar in the remediation of soil pollution. The biochar applications in soil remediation in the past years were summarized, such as the removal of heavy metals and persistent organic pollutants (POPs), and the improvement of soil quality. Finally, the potential risks of biochar application and the future research directions were analyzed.

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“…In comparison with other techniques, the hydrogen peroxide modification is cost effective, easily accessible, the decomposition products H 2 O and O 2 are environmentally friendly, and at a 10% concentration it has a greater absorption compared to commercial alternatives. Chemical activation methodologies with potassium hydroxide, carbon dioxide and steam current physical techniques require high temperatures, approximately 800°C, which increases the process costs and risks 18,23…”

Section: Methodsmentioning

confidence: 99%

Effectiveness of Biochar Obtained from Corncob for Immobilization of Lead in Contaminated Soil

Rodríguez

Lemos

Trujillo

et al. 2019

Journal of Health and Pollution

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Background. Recent studies have explored the potential for using biochar as a soil amendment in agriculture. However, it can also be used as a gentle remediation option for contaminant reduction. Biochar is a by-product obtained from the pyrolysis of biomass (organic matter). It is known for its long-lasting chemical properties, wide surface area values, and carbon-richness, which make it an efficient method for the immobilization of organic and inorganic contaminants such as heavy metals. Objective. The aim of the present study was to analyze the efficiency of biochar, obtained from the gasification of corncob, for the immobilization of lead in contaminated soils. Methods. In the present study, biochar from corncob was used as an amendment for soil contaminated with lead (extracted from the municipality of Malambo, Colombia) in order to estimate its ability to immobilize leaching lead. A comparison laboratory test applied a modified biochar produced with a 10% hydrogen peroxide chemical treatment. In addition, a pot experiment was done with both biochar by sowing seeds of Pennisetum clandestinum for 33 days. During this period, plant growth was measured for the different amendments of biochar concentrations. Results. Laboratory tests indicated that unmodified biochar obtained a maximum retention of 61.46% of lead, while the modified biochar obtained only 44.53% retention. In the pot experiments, the modified biochar indicated high germination and growth of seeds (up to 89.8%). Conclusions. Although the lead immobilization in soil was positive for both cases, the use of soil with high concentrations of lead (167.62 g/kg) does not indicate biochar's effectiveness for purposes of comparison with the current United States Environmental Protection Agency (USEPA) limit value (400 ppm for bare soil in urban play areas). Therefore, further studies are recommended using soil with lower lead concentration levels. Competing Interests. The authors declare no competing financial interests. One author is an employee of Pure Earth.

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Effect of H2O2 concentrations on copper removal using the modified hydrothermal biochar

Cited by 106 publications

References 33 publications

Enhancement of exchangeable Cd and Pb immobilization in contaminated soil using Mg/Al LDH-zeolite as an effective adsorbent

Enhancement of exchangeable Cd and Pb immobilization in contaminated soil using Mg/Al LDH-zeolite as an effective adsorbent

Preparation and Modification of Biochar Materials and their Application in Soil Remediation

Effectiveness of Biochar Obtained from Corncob for Immobilization of Lead in Contaminated Soil

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