Effects of Zn in sludge-derived biochar on Cd immobilization and biological uptake by lettuce

Gao, Jia; Zhao, Tuokun; Tsang, Daniel C.W.; Zhao, Nan; Wei, Hang; Feng, Mingyu; Liu, Kunyuan; Zhang, Weihua; Qiu, Rongliang

doi:10.1016/j.scitotenv.2020.136721

Cited by 22 publications

(2 citation statements)

References 59 publications

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“…Because Cd and Zn compete for absorption sites, greater Zn uptake can reduce the plant Cd uptake (Adiloglu, 2002). Therefore, the high levels of Zn in SSBC (Lu et al., 2013) would allow it to be applied for the remediation of Cd‐contaminated soils (Gao et al., 2020). Corn, which is one of the most widely cultivated crops in the world, is also highly susceptible to Zn deficiency (Martens & Westermann, 1991).…”

Section: Resultsmentioning

confidence: 99%

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

et al. 2020

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Thermal treatment by pyrolysis has been proposed as a sustainable alternative to enable the agricultural use of sewage sludge. The solid product obtained via pyrolysis of sewage sludge is called sewage sludge biochar and presents several advantages for its use as a fertilizer or soil conditioner. However, there are concerns about the accumulation and dynamics of trace elements in soil amended with sewage sludge biochar over the years. This study examined the effect of sewage sludge biochar, under field conditions for 5 yr, on the accumulation and availability of trace elements in a tropical soil. For this, 15 t ha–1 of sewage sludge biochar produced at 300 and 500 °C were applied in the first two growing seasons. Application was interrupted from the third to the fifth seasons to assess the residual effect of sewage sludge biochar in the soil. The total and available trace element concentrations were determined. The total contents of trace elements showed the following variation in the soil over the 5 yr (mg kg–1): Cd (16.8–20.0), Co (19.5–21.5), Cr (98.2–125.7), Cu (8.1–17.1), Mn (62.9–85.7), Ni (20.3–35.0), Pb (27.0–52.4), and Zn (20.3–35.8). There was no change in the availability of Cd, Cr, Ni, and Pb over the years. Additionally, a residual effect of the sewage sludge biochar was the increase in availability of trace elements that are considered essential (Cu, Mn, and Zn) and beneficial elements (Co) for plants. Therefore, in relation to contamination by trace elements, the pyrolysis of sewage sludge of domestic origin proved to be an adequate strategy to enable the safe use of this residue in tropical agriculture.

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Section: Resultsmentioning

confidence: 99%

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

et al. 2020

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“…The presence of carbonates, phosphates, and silicates in biochar has the potential to cause the precipitation of heavy metals such as CdCO 3 [13], Pb 5 (PO 4 ) 3 Cl [14], and Pb 5 (PO 4 ) 3 OH [15]. The biochar's surface is loaded with many organic functional groups, including carboxyl, phenolic, hydroxyl, and imine, among others [16][17][18][19][20]. Through coordination and chelation, these functional groups have the potential to form stable complexes with metals found in soils, which would ultimately result in the metals being immobilized [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Remediation of Soil Co-Contaminated by Cu and Cd in a Semi-Arid Area with Sewage Sludge-Derived Biochar

Wang,

Wei,

Yang

et al. 2024

Sustainability

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In this study, biochar derived from sewage sludge was applied to remediate Cu and Cd co-polluted soil in semi-arid areas for the first time, in which the effects of biochar on the improvement of soil physicochemical and biological properties as well as the immobilization of Cu and Cd were investigated. Soil water holding capacity increased by 0.22–2.74%, soil CEC increased by 0.52–4.06 units, soil SOM content increased by 1.41–5.97 times, and urease and catalase activities increased by 0.012–0.032 mg·g−1·24 h−1, 0.18–2.95 mg H2O2·g−1, but soil pH increased only slightly by 0.69 units after biochar application. In addition, although the total content of these two metals in the soil increased with the use of biochar, the content of DTPA-Cu and Cd decreased by −0.128–0.291 mg/kg, 0–0.037 mg/kg, with the increase in biochar application, and the content of acid-soluble Cu in the soil decreased from 27.42 mg/kg to 3.76 mg/kg, the mobility and bioavailability of these two metals in the soil decreased. Finally, the complexation of organic functional groups with the soil dominates the immobilization process of metals, especially Cu. These findings suggest that biochar from sewage sludge can effectively improve soil quality and remediate heavy metal-contaminated soils in semi-arid regions. Meanwhile, the use of sludge-based biochar for the remediation of contaminated soils also provides a new method for the safe disposal of sewage sludge and a new way for sustainable development. In subsequent studies, methods such as modification are recommended to improve the efficiency of sludge-based biochar for the removal of Cu and Cd.

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Sustainable Agriculture and Plant Production by Virtue of Biochar in the Era of Climate Change

Tauqeer

Turan

Farhad

et al. 2022

Managing Plant Production Under Changing Environment

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Effects of Zn in sludge-derived biochar on Cd immobilization and biological uptake by lettuce

Cited by 22 publications

References 59 publications

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil

The Effect of Remediation of Soil Co-Contaminated by Cu and Cd in a Semi-Arid Area with Sewage Sludge-Derived Biochar

Sustainable Agriculture and Plant Production by Virtue of Biochar in the Era of Climate Change

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