Remediation of saline soils by a two-step process: Washing and amendment with sludge

Sastre-Conde, Isabel; Lobo, M. Carmen; Beltrán-Hernández, Rosa Icela; Poggi‐Varaldo, Héctor M.

doi:10.1016/j.geoderma.2014.12.002

Cited by 59 publications

(23 citation statements)

References 50 publications

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“…It was also documented that application of farm manure produced with cow dung led to an increase in total N content in the soil profile (0-5, 5-20 and 20-40 cm) in the saline-alkaline soils in northern Jiangsu Province, China [28]. Based on regression analysis, Sastre-Conde et al (2015) demonstrated that organic amendments improved several chemical characteristics of saline soils, most notably the levels of nutrients such as C, N and P. Additionally, amendment dose had a significant positive effect on soil N and P contents with both nutrients showing high levels in high dosage treatments [29]. Similar results were found in the present research.…”

Section: The Content Of Inorganic Nitrogen In Soils At the Harvest Ofmentioning

confidence: 99%

Addition of organic fertilizer affects soil nitrogen availability in a salinized fluvo-aquic soil

Wang

Cheng

Liu

et al. 2019

Environmental Pollutants and Bioavailability

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Organic matter application was one of the suitable ways to improve soil nitrogen availability in saline soils. In this study, two soils of different levels of total soluble salts, 2.45 g kg −1 (LS) and 4.03 g kg −1 (HS), were used in a pot experiment with eight treatments: bio-organic fertilizer (prepared with cow dung) and farmyard manure (fowl manure) each at three dosages (3350, 6700, and 13,400 kg ha −1), chemical fertilizer control (DAP: 1675 kg ha −1), no fertilizer blank. At the same time, an indoor nitrogen mineralization incubation experiment with the same treatments without alfalfa planting was carried out. We aimed to explore the effects of the types and application amounts of organic fertilizers on soil nitrogen mineralization in saline soils and to improve its quality and finally realize its sustainable utilization. The main conclusions are as follows: the biomass of alfalfa treated with medium dose of organic fertilizer was higher than that of alfalfa treated with low or high dose of organic fertilizer. Compared with farmyard manure, bio-organic manure was more effective in increasing the biomass of alfalfa. The nitrogen uptake of alfalfa in high-dose treatment was significantly higher than that in lowdose treatment. The effects of the fertilizer treatments on soil nitrogen availability were in the increasing order of: medium dose, high or low dose of fertilizer treatment, single chemical fertilizer, and fertilizer free treatments by principal component analysis. For possible potential application, medium dosage of bio-organic fertilizer was recommended to apply in the region with saline fluvo-aquic soil.

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Section: The Content Of Inorganic Nitrogen In Soils At the Harvest Ofmentioning

confidence: 99%

Addition of organic fertilizer affects soil nitrogen availability in a salinized fluvo-aquic soil

Wang

Cheng

Liu

et al. 2019

Environmental Pollutants and Bioavailability

View full text Add to dashboard Cite

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“…Wheat seed germination and growth test is a rapid and practical technique that is extensively used for monitoring the toxicity of environmental samples (Wang T. et al, 2016;Mohamed et al, 2017) especially in assessing the change of soil properties and the toxicity of residual metals after soil washing (Im et al, 2015;Sastre-Conde et al, 2015;Yoo et al, 2016). To evaluate the potential toxicity of remediated soils before and after washing with various biodegradable chelators, wheat seed germination and growth tests were carried out as described by Gil-Díaz et al (2017) with some modifications.…”

Section: Soil Phytotoxicitymentioning

confidence: 99%

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Wang

Zhang

Zhong

et al. 2018

Science of The Total Environment

108

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Soil washing with chelators is a promising and efficient method of remediating metals-contaminated soils. However, the toxicity of residual metals and the effects on soil microbial properties have remained largely unknown after washing. In this study, we employed four biodegradable chelators for removal of metals from contaminated soils: iminodisuccinic acid (ISA), glutamate-N,N-diacetic acid (GLDA), glucomonocarbonic acid (GCA), and polyaspartic acid (PASP). The maximum removal efficiencies for Cd, Pb, and Zn of 85, 55, and 64% and 45, 53, and 32% were achieved from farmland soil and mine soil using biodegradable chelators, respectively. It was found that the capacity of ISA and GLDA to reduce the labile fraction of Cd, Pb, and Zn was similar to that of the conventional non-biodegradable chelator ethylenediaminetetraacetic acid (EDTA). The leachability, mobility, and bioaccessibility of residual metals after washing decreased notably in comparison to the original soils, thus mitigating the estimated environmental and human health risks. Soil β-glucosidase activity, urease activity, acid phosphatase activity, microbial biomass nitrogen, and microbial biomass phosphorus decreased in the treated soils. However, compared with EDTA treatment, soil enzyme activities distinctly increased by 5-94% and overall microbial biomass slightly improved in the remediated soils, which would facilitate reuse of the washed soils. Based on soil toxicity tests that employed wheat seed germination as the endpoint of assessment, the washed soils exhibited only slight effects especially after ISA and GLDA treatments, following high-efficiency metal removal. Hence, ISA and GLDA appear to possess the greatest potential to rehabilitate polluted soils with limited toxicity remaining.

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“…The remediation of coastal saline soil has become a challenging task for government and scientific researchers. Among the remediation methods, physical effects, chemical, biological, and biochemical property were used to ameliorate salt‐affected soils (Cao, Li, Liu, Kong, & Tran, ; Rabhi et al, ; Sastre‐Conde, Lobo, Beltrán‐Hernández, & Poggi‐Varaldo, ; Sun, Lu, Chu, Shao, & Shi, ). Initial studies focused on the use of chemical amendments, such as gypsum (CaSO 4 .…”

Section: Introductionmentioning

confidence: 99%

Assessment of organic amendments for improving coastal saline soil

Xin-min

Yang

et al. 2018

Land Degrad Dev

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Salt-affected soils are an important resources; although the crop yields in the soils are lower, they should not be ignored nor given up. By using pot experiments, five different organic amendments (pig manure, cattle dung, chicken manure, rapeseed meal, and biochar) were used to investigate their effects on the chemical properties and enzyme activities of coastal saline soil as well as the growth of wheat. We also compared the suitable application doses of these organic amendments. After the treatment of five organic amendments, soils were incubated for 30 days at a constant temperature and moisture. The results showed that organic amendments had the property to decrease soil pH, increase organic matter, change soil enzyme activities, and promote wheat growth. With the rapeseed meal addition at the dose of 50 g kg −1 , soil pH decreased from 8.29 to 7.06, which was 14.8% lower than that in the control soil (no amendments), the organic matter as well as the activities of catalase, urease, alkaline phosphatase, and saccharase significantly increased, and the biomass of wheat increased by 48.4%. Compared with control, the rapeseed meal and pig manure were recommended as the suitable soil amendments for remediating coastal saline soil, and the suitable application dose is 50 g kg −1 . These data suggested that rapeseed meal and pig manure are an efficient choice in improving salt-induced land degradation. This study will not only lay the theoretical foundation for remediating coastal saline soil but also provide advice on selecting organic matters in ameliorating coastal saline soil.

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Remediation of saline soils by a two-step process: Washing and amendment with sludge

Cited by 59 publications

References 50 publications

Addition of organic fertilizer affects soil nitrogen availability in a salinized fluvo-aquic soil

Addition of organic fertilizer affects soil nitrogen availability in a salinized fluvo-aquic soil

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Assessment of organic amendments for improving coastal saline soil

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