Adsorption of cadmium by Na and Fe modified zeolitic tuffs and carbonaceous material from pyrolyzed sewage sludge

Gutiérrez-Segura, E.; Solache‐Ríos, M.; Colín-Cruz, Arturo; Fall, Cheikh

doi:10.1016/j.jenvman.2011.11.010

Cited by 58 publications

(33 citation statements)

References 39 publications

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“…The H + ions displace cadmium ions bonded to the biochars during desorption stage (Tajar et al 2009). From these results, it may be inferred that the proposed cadmium adsorption mechanism with biochars is mainly an electrostatic interaction due to high desorption by acidic solution (Gutierrez-Segura et al 2012;Zhai et al 2004). Positively charged Cd 2+ might be fixed on the surface of biochars, which is negatively charged.…”

Section: Adsorption Mechanism Of Cadmium Ion By Biochars Themselvesmentioning

confidence: 88%

“…Introduction metal plating, cadmium-nickel batteries, phosphate fertilizer, mining, pigments, photographs, dyes and textile operations, stabilizer, and alloy manufacturing (Boparai et al 2011;Balkaya and Cesur 2008;Al-Anber and Matouq 2008;Gutierrez-Segura et al 2012). In Thailand, some cadmium exposure health effects have been reported in Mae Sod District, Tak Province (Swaddiwudhipong et al 2007).…”

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confidence: 99%

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Effect of biochars and microorganisms on cadmium accumulation in rice grains grown in Cd-contaminated soil

Suksabye

Pimthong

Dhurakit

et al. 2015

Environ Sci Pollut Res

100

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Cadmium (Cd) contaminated in rice grains is a serious problem because most Asians consume rice on a daily basis. Rice grown in Cd-contaminated soil normally did not have high concentration of Cd. However, soil samples used in this study had high concentrations of Cd. The purpose of this study was to clearly see the effects of biochar and microorganism addition in rice growing in Cd-contaminated soil. The initial Cd concentration in Cd-contaminated soil used in this study was about 650 mg kg(-1). Cadmium concentration in rice plants grown in Cd-contaminated soil with the addition of 1% (w/w) different biochars such as sawdust fly ash (SDFA), bagasse fly ash (BGFA), and rice husk ash (RHA) was investigated. The results showed that SDFA was the best biochar in terms of reducing cadmium accumulation in rice grains when compared to BGFA and RHA under the same conditions. In addition, rice plants grown in Cd-contaminated soil with the addition of various nonpathogenic microorganisms, such as Pseudomonas aeruginosa, Bacillus subtilis, and Beauveria bassiana were also studied. The results showed that the addition of 2% (v/v) microorganisms can reduce Cd accumulation in grains. It was found that grains obtained from Cd-contaminated soil with the addition of P. aeruginosa had the lowest cadmium concentration compared to the ones from soil amended with other strains. This was due to the fact that P. aeruginosa adsorbed more Cd itself into its cells than other strains. The rice plants grown in Cd-contaminated soil with the addition of biochars and microorganisms were also compared. The results showed that adding 2% (v/v) microorganisms seemed to reduce Cd accumulation in rice grains better than adding 1% (w/w) biochars. In addition, the amounts of calcium and magnesium in rice grains and the dry weight of plant in Cd-contaminated soil amended with P. aeruginosa were the highest in comparison to other microorganisms, biochars, and the soil without any amendments (Cd-soil control). It might be possible that microorganisms can cause leaching of Ca, Mg, etc. from contaminated soil and compete with Cd to be uptaken by plants. This would cause the increase in plant dry weight and higher mineral nutrients accumulation in grains. Both biochars and microorganisms are suitable for reducing the amount of Cd in rice grains. The application should depend on farmers, biochars available in nearby areas, etc. Therefore, microorganisms and biochars can be used to solve the problem of cadmium contamination in rice grains.

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Section: Adsorption Mechanism Of Cadmium Ion By Biochars Themselvesmentioning

confidence: 88%

mentioning

confidence: 99%

Effect of biochars and microorganisms on cadmium accumulation in rice grains grown in Cd-contaminated soil

Suksabye

Pimthong

Dhurakit

et al. 2015

Environ Sci Pollut Res

100

View full text Add to dashboard Cite

show abstract

“…Semerjian (2010) reported that almost complete Cd removal was achieved in the presence of 10 g l -1 untreated Pinus halpensis sawdust compared to higher adsorbent dose. Gutiérrez-Segura et al (2012) found that the adsorption capacities of Cd decreased with increasing the dosage adsorbent (Na and Fe modified zeolitic tuffs and carbonaceous material from pyrolyzed sewage sludge).…”

Section: Page 16 Of 36mentioning

confidence: 99%

Assessment of unmodified wetland bio-waste: Shoots of Cyperus laevigatus, for cadmium adsorption from aqueous solutions

Ammari

Al-Labadi

Tahboub

et al. 2015

Process Safety and Environmental Protection

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“…The three samples all showed an endothermic peak, which might be caused by the depolymerization of carbonaceous materials in sludge, and the C-C bond in carbonaceous organic began to fracture and generated CO 2 and CO, and aromatic compounds were procured. [21] In addition, obvious weight loss and endothermic peaks could still be found at 350-800 • C attributed to the C-C fracture of aromatic compounds procured in the process of sludge pyrolysis, Xie et al [22] reported that oxygen functional groups such as quinones and phenol hydroxyl decomposed in this temperature range. The weight losses of DSAC, DSACK, DSACZ, DSACH were about 17.9%, 10.8%, 27.9%, and 19.4%, respectively, at 350-800 • C. The weight loss rate reached the highest at 600 • C. The thermogravimetric curve had a downtrend at the temperature of more than 800 • C, which should be attributed to the continuous adsorption of heat by the activating sample at 800-1000 • C caused by the decomposition of inorganic salts such as sulphate and carbonate.…”

Section: Resultsmentioning

confidence: 99%

Effect of activator on the structure and desulphurization efficiency of sludge-activated carbon

Yan

Zhang

et al. 2014

Environmental Technology

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Sludge-activated carbons (SACs) prepared with excess of activated sludge are used to solve the problems of sludge disposal and odour pollution in a sewage treatment plant. For the preparation, ZnCl2, KOH and H2SO4 are used as activators, respectively. The structure of the SACs are characterized by scanning electron microscope, X-ray photoelectron spectrometer, specific surface area and pore structure technologies, and the adsorption performance of H2S is investigated. Results indicate that the desulphurization activity of SACs, whose activators are ZnCl2 and KOH (SACZ and SACK), is better than that of carbon with H2SO4 as the activator (SACH). The breakthrough time of SACZ and SACK is up to 86 min, the sulphur capacity is 7.7 mg/cm3, and the maximal iodine value is 409.95 mg/g. While the breakthrough time of SACH is only 26 min with the sulphur capacity of 2.3 mg/cm3. A large percentage of pore volume with a diameter of 2-5 nm in the total pore volume is conductive to the desulphurization reaction. The large amount of surface acid functional groups is also helpful to the adsorption of H2S. The desulphurization activity of SACZ and SACK is superior over that of commercial-activated carbon.

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Adsorption of cadmium by Na and Fe modified zeolitic tuffs and carbonaceous material from pyrolyzed sewage sludge

Cited by 58 publications

References 39 publications

Effect of biochars and microorganisms on cadmium accumulation in rice grains grown in Cd-contaminated soil

Effect of biochars and microorganisms on cadmium accumulation in rice grains grown in Cd-contaminated soil

Assessment of unmodified wetland bio-waste: Shoots of Cyperus laevigatus, for cadmium adsorption from aqueous solutions

Effect of activator on the structure and desulphurization efficiency of sludge-activated carbon

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