Effects of biochar, cow bone, and eggshell on Pb availability to maize in contaminated soil irrigated with saline water

Almaroai, Yaser A.; Usman, Adel R.A.; Ahmad, Mahtab; Moon, Deok Hyun; Cho, Ju Sik; Joo, Young Kyoo; Jeon, Choong; Lee, Sang Soo; Ok, Yong Sik

doi:10.1007/s12665-013-2533-6

Cited by 104 publications

(46 citation statements)

References 38 publications

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“…Such results clearly show the short-term effect of pH on metal immobilization caused by the biochar addition, as observed in other studies (Rees et al 2014). Biochar is generally alkaline and thereby can induce liming effects in soil and cause immobilization of metals and mobilization of oxyanions (Almaroai et al 2014). Also, it must be highlighted that biochar addition slightly reduced hysteresis (i.e., irreversible sorption) for Cd, while it increased the hysteresis of Zn in both soils (Table 3-residual fraction).…”

Section: Sorption and Desorption Isothermssupporting

confidence: 87%

Sorption and desorption of cadmium and zinc in two tropical soils amended with sugarcane-straw-derived biochar

et al. 2015

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Purpose Biochars may enhance the retention capacity of metals in soils, especially in highly weathered tropical soil whose low cation exchange capacity renders heavy metals mobile, and thus be able to leach from soils. We evaluated the effect of sugarcane-straw-derived biochar on sorption and desorption of Cd(II) and Zn(II) in two tropical soils in particular to distinguish primary and secondary mechanisms of metal retention. Material and methods To test the efficiency of biochar to retain heavy metals, sugarcane-straw-derived biochar was mixed with a clayey Oxisol and an Entisol both from the state of Sao Paulo, Brazil, in batch testing to obtain sorptiondesorption isotherms of Cd(II) and Zn(II) and measure the release/displacement of cations (Ca 2+ and Mg 2+ ) or precipitation with phosphate during the sorption process. Results and discussion Biochar increased the sorption (including adsorption and precipitation) of both metals in both soils but that most sorption reactions were reversible under buffer acidic conditions, due to dissolution of precipitates in low pH values (<4.9). Exchange of Cd or Zn with Ca and Mg from the biochar was found to play a minor role on the retention mechanism, whereas surface precipitation (mainly in the Entisol) of the metals (e.g. with phosphate) was likely to be the main sorption mechanism. Conclusions Application of sugarcane-straw-derived biochar to heavy-metal-contaminated tropical soils seems justified because of its sorptive capacity for Cd and Zn. However, binding reactions on surfaces were reversible, mainly for Cd(II), resulting in the likelihood that repeat applications of biochar would be required to maintain reduced soil solution concentrations of Cd and Zn over time, thus avoiding phytotoxicity and associated environmental risks.

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Section: Sorption and Desorption Isothermssupporting

confidence: 87%

Sorption and desorption of cadmium and zinc in two tropical soils amended with sugarcane-straw-derived biochar

et al. 2015

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“…In recent years, lots of researchers found that the addition of biochar made from wastes of animals or plants in the absence of oxygen environment can increase soil carbon content, plant available nutrients, and especially improve plant growth in some kinds of soil (Atkinson et al 2010;Major et al 2010;Zhang et al 2010;Almaroai et al 2014;Xu et al 2015). For example, Masto et al (2013) found that 4 t/ha biochar application to acidic red soil improved the maize grain yield by 11.4 % above the control treatment.…”

Section: Introductionmentioning

confidence: 99%

Effects of biochar application on Suaeda salsa growth and saline soil properties

Sun

Shao

et al. 2016

Environ Earth Sci

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Pot experiments were conducted to study the effects of biochar application rates (5, 10, 20 g/kg) and types of wheat straw biochar (WS), corn stalk biochar (CS) and peanut shell biochar (PS) on Suaeda salsa (S. salsa) growth and properties of saline soil in Yellow River Delta. It was found that S. salsa yield increased from 11.7 to 115 % under WS application at a range of 5-10 g/kg compared with control. As biochar rate increased to 20 g/ kg, the increment decreased to 102 %. The underground biomass of S. salsa only increased at 20 g/kg rate. The S. salsa growth respond to biochar followed the order of PS [ WS [ CS. Biochar application generally reduced saline soil pH and the effect was more obvious for WS. The content of total organic matter increased significantly at biochar rate of 10-20 g/kg. WS at higher application rate (20 g/kg) significantly increased available phosphorus content. At the same time, CS increased more available phosphorus content while PS decreased more of exchange sodium percentage. In generally, biochar application improved saline soil quality and enhanced plant growth although these effects should be tested in long-term period.

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“…It is a low-cost adsorbent which has recently started receiving increased attention due to its many potential environmental applications and benefits. The use of biochar as a sorbent for the treatment of wastewater containing heavy metals is an emerging and promising treatment technology (Almaroai et al 2013;Lee et al 2013;Ahmad et al 2014). Biochar tends to possess greater sorption ability than natural soil organic matter due to its greater surface area, greater negative surface charge, and greater charge density (Liang et al 2006;Yang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of phosphorus adsorption capacity of sesame straw biochar on aqueous solution: influence of activation methods and pyrolysis temperatures

Park

Kim

et al. 2015

Environ Geochem Health

127

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The phosphorus (P) adsorption characteristic of sesame straw biochar prepared with different activation agents and pyrolysis temperatures was evaluated. Between 0.109 and 0.300 mg L(-1) in the form of inorganic phosphate was released from raw sesame straw biochar in the first 1 h. The release of phosphate was significantly enhanced from 62.6 to 168.2 mg g(-1) as the pyrolysis temperature increased. Therefore, sesame straw biochar cannot be used as an adsorbent for P removal without change in the physicochemical characteristics. To increase the P adsorption of biochar in aqueous solution, various activation agents and pyrolysis temperatures were applied. The amount of P adsorbed from aqueous solution by biochar activated using different activation agents appeared in the order ZnCl2 (9.675 mg g(-1)) > MgO (8.669 mg g(-1)) ⋙ 0.1N-HCl > 0.1N-H2SO4 > K2SO4 ≥ KOH ≥ 0.1N-H3PO4, showing ZnCl2 to be the optimum activation agent. Higher P was adsorbed by the biochar activated using ZnCl2 under different pyrolysis temperatures in the order 600 °C > 500 °C > 400 °C > 300 °C. Finally, the amount of adsorbed P by activated biochar at different ratios of biochar to ZnCl2 appeared in the order 1:3 ≒ 1:1 > 3:1. As a result, the optimum ratio of biochar to ZnCl2 and pyrolysis temperature were found to be 1:1 and 600 °C for P adsorption, respectively. The maximum P adsorption capacity by activated biochar using ZnCl2 (15,460 mg kg(-1)) was higher than that of typical biochar, as determined by the Langmuir adsorption isotherm. Therefore, the ZnCl2 activation of sesame straw biochar was suitable for the preparation of activated biochar for P adsorption.

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Effects of biochar, cow bone, and eggshell on Pb availability to maize in contaminated soil irrigated with saline water

Cited by 104 publications

References 38 publications

Sorption and desorption of cadmium and zinc in two tropical soils amended with sugarcane-straw-derived biochar

Sorption and desorption of cadmium and zinc in two tropical soils amended with sugarcane-straw-derived biochar

Effects of biochar application on Suaeda salsa growth and saline soil properties

Evaluation of phosphorus adsorption capacity of sesame straw biochar on aqueous solution: influence of activation methods and pyrolysis temperatures

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