Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Jiang, Ning‐Jun; Wang, Yi-Jie; Chu, Jian; Kawasaki, Satoru; Tang, Chaosheng; Cheng, Liang; Du, Yao; Shashank, B. S.; Singh, Devendrá; Han, Xiao-Le; Wang, Yuze

doi:10.1111/sum.12736

Cited by 63 publications

(11 citation statements)

References 212 publications

(262 reference statements)

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“…Urea hydrolysis, which is triggered by aerobic ureolytic bacteria (e.g., Sporosarcina pasteurii, Lysinibacillus sphaericus, and Bacillus sphaericus) (Sigurdarson et al, 2018;Jiang et al, 2021), drives the transformation of urea to NH 4 + in soil (Vlek et al, 1980;Svane et al, 2020). Neem leaf extract used in the current study proved to be a stimulator of urea hydrolysis, in contrast to other studies whose findings indicated inhibitory effects (Sahrawat, 1980;Prasad and Power, 1995;Varel, 1997).…”

Section: Urea Hydrolysiscontrasting

confidence: 72%

Effects of neem leaf extract on inorganic nitrogen transformation in sandy soil

Butnan¹,

Duangpukdee²,

Sriraj³

2022

Soil Sci. Ann.

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The inhibitory effects of neem leaf extract on fertilizer nitrogen (N) transformation in soil have not been fully recognized. This study therefore aimed to evaluate the effects of fi ve nitrifi cation inhibitors on the status of soil inorganic N, urea hydrolysis, and nitrifi cation: i) no inhibitor (control); ii) nitrapyrin; and three rates of neem leaf extract based on the dry weight of the raw material: iii) 1 g kg -1 soil; iv) 2 g kg -1 soil; v) 4 g kg -1 soil. Neem leaf extract in all rates increased urea hydrolysis rate on days 5−15. In contrast, nitrapyrin decreased urea hydrolysis on days 5−10, compared to the control. As for nitrifi cation, neem leaf extract showed both stimulatory and inhibitory effects. The stimulation appeared on day 3, whereas inhibition occurred and peaked on days 5−15. Nitrapyrin showed inhibitory effects on days 10−15, reaching its peak on day 15. Increasing rates of neem leaf extract brought about increases in stimulation and inhibition of urea hydrolysis and nitrifi cation. The results conclusively stated that the neem leaf extract had generally faster, stronger, and longer nitrifi cation inhibition than nitrapyrin. The stimulation in the early phase and the inhibition in the later phase of the incubation of neem leaf extract were more pronounced with higher application rates.

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Section: Urea Hydrolysiscontrasting

confidence: 72%

Effects of neem leaf extract on inorganic nitrogen transformation in sandy soil

Butnan¹,

Duangpukdee²,

Sriraj³

2022

Soil Sci. Ann.

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“…Heavy metal contamination not only raises sustainable concerns but also causes threats to human health and plants (Kumari et al, 2016;Jiang et al, 2019;Rahman et al, 2020;Chen et al, 2021a;Tan et al, 2022). In the past few decades, remediation methods including replacement, soil flushing, electrokinetic remediation, chemical precipitation, ion exchange, and phytoremediation were developed (Mena et al, 2016;Kumari et al, 2017;Kumari et al, 2018;Chen and Achal, 2019;Duarte-Nass et al, 2020;Ahenkorah et al, 2021;Hu L. et al, 2021;Jiang et al, 2021). However, they are usually time-consuming and may cause secondary pollution (Achal et al, 2012;Nancharaiah et al, 2016;Kappaun et al, 2018;Xue et al, 2022;Yan et al, 2021;Duan et al, 2021a;Cheng et al, 2021;Duan et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Calcium Source on Pb and Cu Remediation Using Enzyme-Induced Carbonate Precipitation

Wang

Cheng

Xue

2022

Front. Bioeng. Biotechnol.

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Heavy metal contamination not only causes threat to human health but also raises sustainable development concerns. The use of traditional methods to remediate heavy metal contamination is however time-consuming, and the remediation efficiency may not meet the requirements as expected. The present study conducted a series of test tube experiments to investigate the effect of calcium source on the lead and copper removals. In addition to the test tube experiments, numerical simulations were performed using Visual MINTEQ software package considering different degrees of urea hydrolysis derived from the experiments. The remediation efficiency degrades when NH4+ and OH− concentrations are not sufficient to precipitate the majority of Pb2+ and Cu2+. It also degrades when CaO turns pH into highly alkaline conditions. The numerical simulations do not take the dissolution of precipitation into account and therefore overestimate the remediation efficiency when subjected to lower Pb(NO3)2 or Cu(NO3)2 concentrations. The findings highlight the potential of applying the enzyme-induced carbonate precipitation to lead and copper remediations.

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“…Such heavy metal contamination remediation by the traditional soil flushing measure is deemed time-consuming and costly since heavy metal ions are easily adsorbed by soil particles, and intensive industrial activities further aggravate heavy metal contamination ( Yang et al, 2014 ; An et al, 2019 ; Kumar and Dwivedi, 2019 ; Bai et al, 2021 ; Cheng et al, 2021 ; Duan et al, 2021 ; Wei et al, 2021 ; Yuan et al, 2021 ; Chen et al, 2022b ). In the past few years, various remediation measures, including but not limited to physical, chemical, and biological measures, have been proposed to deal with heavy-metal contamination ( Dhami et al, 2013 ; Shashank et al, 2016 ; Qian et al, 2017 ; Rahman et al, 2020 ; Ahenkorah et al, 2021a ; Hu et al, 2021 ; Jiang et al, 2021 ; and Xue et al, 2022 ). Amongst the heavy metal contamination remediation measures, enzyme-induced carbonate precipitation (EICP) is an environmentally friendly, efficient, and sustainable measure.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Urease Concentration and Calcium Source on Enzyme-Induced Carbonate Precipitation for Lead Remediation

et al. 2022

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Heavy metal contamination during the rapid urbanization process in recent decades has notably impacted our fragile environments and threatens human health. However, traditional remediation approaches are considered time-consuming and costly, and the effect sometimes does not meet the requirements expected. The present study conducted test tube experiments to reproduce enzyme-induced carbonate precipitation applied to lead remediation under the effects of urease concentration and a calcium source. Furthermore, the speciation and sequence of the carbonate precipitation were simulated using the Visual MINTEQ software package. The results indicated that higher urease concentrations can assure the availability of CO32− during the enzyme-induced carbonate precipitation (EICP) process toward benefiting carbonate precipitation. The calcium source determines the speciation of carbonate precipitation and subsequently the Pb remediation efficiency. The use of CaO results in the dissolution of Pb(OH)2 and, therefore, discharges Pb ions, causing some difficulty in forming the multi-layer structure of carbonate precipitation and degrading Pb remediation. The findings of this study are useful in widening the horizon of applications of the enzyme-induced carbonate precipitation technology to heavy metal remediation.

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Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Cited by 63 publications

References 212 publications

Effects of neem leaf extract on inorganic nitrogen transformation in sandy soil

Effects of neem leaf extract on inorganic nitrogen transformation in sandy soil

The Effect of Calcium Source on Pb and Cu Remediation Using Enzyme-Induced Carbonate Precipitation

Effects of the Urease Concentration and Calcium Source on Enzyme-Induced Carbonate Precipitation for Lead Remediation

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