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Huang H, Zhao R, Guo G, He Y, Chen S, Zhu Y, Xiao M, Liu P, Liu J, Fang Y, Zhou Y. Effect of various phosphorus levels on the extraction of Cd, the transformation of P, and phosphorus-related gene during the phytoremediation of Cd contaminated soil. ENVIRONMENTAL RESEARCH 2024; 251:118389. [PMID: 38460661 DOI: 10.1016/j.envres.2024.118389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 03/11/2024]
Abstract
Phytoremediation has emerged as a common technique for remediating Cd pollution in farmland soil. Moreover, phosphorus, an essential element for plants, can alter the pectin content of plant cell walls and facilitate the accumulation of Cd in plant tissues, thereby enhancing phytoremediation efficiency. Therefore, pot experiments were conducted in order to investigate the effect of phosphorus levels on Cd extraction, phosphorus transformation and phosphorus-related genes during phytoremediation. The results revealed that an optimal application of suitable phosphate fertilizers elevated the soil's pH and electrical conductivity (EC), facilitated the conversion of soil from insoluble phosphorus into available forms, augmented the release of pertinent enzyme activity, and induced the expression of phosphorus cycling-related genes. These enhancements in soil conditions significantly promoted the growth of ryegrass. When applying phosphorus at a rate of 600 mg/kg, ryegrass exhibited plant height, dry weight, and chlorophyll relative content that were 1.27, 1.26, and 1.18 times higher than those in the control group (P0), while the Cd content was 1.12 times greater than that of P0. The potentially toxic elements decline ratio and bioconcentration factor were 42.86% and 1.17 times higher than those of P0, respectively. Consequently, ryegrass demonstrated the highest Cd removal efficiency under these conditions. Results from redundancy analysis (RDA) revealed a significant correlation among pH, total phosphorus, heavy metal content, phosphorus forms, soil enzyme activity, and phosphorus-related genes. In conclusion, this study suggests applying an optimal amount of suitable phosphate fertilizers can enhance restoration efficiency, leading to a reduction in soil Cd content and ultimately improving the safety of crop production in farmlands.
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Affiliation(s)
- Hongli Huang
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Rule Zhao
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Guanlin Guo
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China.
| | - Yinhai He
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing, 100012, China
| | - Shuofu Chen
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Yichun Zhu
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Mingjun Xiao
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Ping Liu
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Junwu Liu
- Hunan Engineering Research Center of Mine Site Pollution Remediation, Changsha 410118, China
| | - Yingchun Fang
- Hunan Engineering Research Center of Mine Site Pollution Remediation, Changsha 410118, China
| | - Yaoyu Zhou
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China.
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Somani M, Harbottle M, Datta M, Ramana GV, Sreekrishnan TR. Identification and assessment of appropriate remediation management techniques for the recovery of soil-like material produced in landfill mining. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119300. [PMID: 37862889 DOI: 10.1016/j.jenvman.2023.119300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/07/2023] [Accepted: 10/07/2023] [Indexed: 10/22/2023]
Abstract
Landfill mining has received major attention in recent years for the reclamation of waste disposal sites, including in developing countries such as India where significant efforts are being made to manage sites in this way. The bulk of the material obtained from landfill mining consists of fine-grained soil-like material (SLM) but its direct reuse in off-site applications is restricted due to the presence of harmful heavy metals, soluble salts and other pollutants. In this study, appropriate techniques for managing SLM to permit recovery and reuse are assessed. As a result, experimental investigation explores the efficacy of two remediation techniques considered appropriate for SLM management: electrokinetic remediation and phytoremediation. These were applied to SLM from a recently mined landfill and their ability to reduce heavy metal and other soluble salt burdens assessed. Electrokinetic remediation has shown considerable potential to mobilise and transport heavy metals and soluble salts through and from the SLM over an eight-week period. Phytoremediation experiments also demonstrated mobilisation and uptake of metals from the SLM over a similar duration although relatively low amounts were recovered as a result of the low biomass produced over this period. Both technologies have demonstrated potential for recovery of metals from SLM, as well as recovering the SLM itself as a potential resource.
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Affiliation(s)
- Mohit Somani
- Cardiff School of Engineering, Cardiff University, The Parade, Cardiff, CF24 3AA, Wales, UK; Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India.
| | - Michael Harbottle
- Cardiff School of Engineering, Cardiff University, The Parade, Cardiff, CF24 3AA, Wales, UK
| | - Manoj Datta
- Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India
| | - G V Ramana
- Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India
| | - T R Sreekrishnan
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India
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Petitjean M, Isasi JR. Preparation of β-cyclodextrin/polysaccharide foams using saponin. Beilstein J Org Chem 2023; 19:78-88. [PMID: 36761472 PMCID: PMC9887783 DOI: 10.3762/bjoc.19.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 01/10/2023] [Indexed: 01/25/2023] Open
Abstract
Cyclodextrins, cyclic oligosaccharides with a hydrophobic cavity that form inclusion complexes with nonpolar molecules, can be used to functionalize other polysaccharides. Xanthan gum, locust bean gum or chitosan can be crosslinked using citric acid in the presence of β-cyclodextrin to produce insoluble matrices. In this work, polymeric foams based on those polysaccharides and saponin have been prepared using a green synthesis method to increase the porosity of the matrices. The saponin of soapbark (Quillaja saponaria) has been used to obtain foams using different procedures. The influence of the synthesis path on the porosity of the materials and their corresponding sorption capacities in the aqueous phase were evaluated.
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Affiliation(s)
- Max Petitjean
- Department of Chemistry. University of Navarra. 31080 Pamplona, Spain
| | - José Ramón Isasi
- Department of Chemistry. University of Navarra. 31080 Pamplona, Spain
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Zhao R, Huang L, Peng X, Fan L, Chen S, Qin P, Zhang J, Chen A, Huang H. Effect of different amounts of fruit peel-based activator combined with phosphate-solubilizing bacteria on enhancing phytoextraction of Cd from farmland soil by ryegrass. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120602. [PMID: 36379291 DOI: 10.1016/j.envpol.2022.120602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/31/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
To improve the uptake of heavy metals by plants and increase the effectiveness of phytoextraction, chelating agents are employed to change the speciation of heavy metals in soil and increase their bioavailability. However, the effect of a single activator is limited. In recent years, compound activators have been applied widely to improve phytoextraction efficiency. In this study, a fruit peel-based activator (OG) was prepared, containing a mixture of orange peel extracts and tetrasodium glutamate diacetate (GLDA) (1.6% v/v) in a ratio of 1:1 (v/v). The pot experiment was used to investigate the effects of different amounts of OG combined with phosphate-solubilizing bacteria (Acinetobacter pitti, AP) on the extraction of Cd from farmland soil by ryegrass (Lolium perenne L). The results indicated that the addition of OG and AP increased the pH and EC of the soil and improved the content of nutrient elements in the soil. The optimal combination of the application rates of OG and AP improved the growth of ryegrass and enhanced the phytoextraction of Cd. Redundancy analysis (RDA) showed that total soil nitrogen had the greatest influence on phytoextraction, with a contribution rate of 85.3%, followed by pH, with a contribution rate of 7.7%. Total nitrogen, pH, available phosphorus, alkaline nitrogen, and total organic matter were correlated positively with plant Cd, soil Cd decrease ratio, and the bioaccumulation factor but negatively with total Cd and available Cd. Based on the findings of this study, it is feasible to apply the fruit peel-based activator (amended with GLDA) and phosphate-solubilizing bacteria to enhance phytoextraction of Cd, which will provide a valuable reference for the treatment of heavy metal-contaminated soils and the reutilization of fruit peel waste. When applying the compound activator, it is recommended to consider the influence of the additional amount of compound activator on the extraction efficiency.
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Affiliation(s)
- Rule Zhao
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Liuhui Huang
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Xin Peng
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Lingjia Fan
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Shuofu Chen
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Pufeng Qin
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jiachao Zhang
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Anwei Chen
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Hongli Huang
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
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Influence of Ascophyllum nodosum Extract Foliar Spray on the Physiological and Biochemical Attributes of Okra under Drought Stress. PLANTS 2022; 11:plants11060790. [PMID: 35336672 PMCID: PMC8949179 DOI: 10.3390/plants11060790] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/09/2022] [Accepted: 03/09/2022] [Indexed: 11/17/2022]
Abstract
Drought stress restricts the growth of okra (Abelmoschus esculentus L.) primarily by disrupting its physiological and biochemical functions. This study evaluated the role of Ascophyllum nodosum extract (ANE) in improving the drought tolerance of okra. Drought stress (3 days (control), 6 days (mild stress), and 9 days (severe stress)) and 4 doses of ANE (0, 0.1%, 0.2%, and 0.3%) were imposed after 30 days of cultivation. The results indicate that drought stress decreases the chlorophyll content (total chlorophyll, chlorophyll a, chlorophyll b, and carotenoid) but increases the activity of anthocyanin, proline, and antioxidant enzymes such as ascorbate peroxidase (APX), peroxidase (POD), and catalase (CAT). Physiological and biochemical plant disturbances and visible growth reduction in okra under drought stress were significantly decreased by the application of ANE foliar spray. ANE spray (0.3%) significantly increased the chlorophyll abundance and activity of anthocyanin, proline, and antioxidants (APX, POD, and CAT). ANE regulated and improved biochemical and physiological functions in okra under both drought and control conditions. The results of the current study show that ANE foliar spray may improve the growth performance of okra and result in the development of drought tolerance in okra.
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Li Y, Ali A, Jeyasundar PGSA, Azeem M, Tabassum A, Guo D, Li R, Mian IA, Zhang Z. Bacillus subtilis and saponin shifted the availability of heavy metals, health indicators of smelter contaminated soil, and the physiological indicators of Symphytum officinale. CHEMOSPHERE 2021; 285:131454. [PMID: 34271464 DOI: 10.1016/j.chemosphere.2021.131454] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 06/10/2021] [Accepted: 07/04/2021] [Indexed: 06/13/2023]
Abstract
Bacillus subtilis and saponin were tested for the uptake of heavy metals (HMs) by Symphytum officinale grown in a smelter-contaminated soil in completely randomized design. Soil pH and electrical conductivity increased by 0.11 unit (T3) and 754 mS cm-1 (T2), respectively. The bioavailable Zn decreased by 5.80% (T2); Cd and Pb increased by 6.21% (T2) and 13.46% (T3), respectively. Soil urease increased by 24% (T3) and alkaline phosphatase, β-glucosidase, and dehydrogenase decreased by 20% (T2), 27.70% (T2), and 21% (T1), respectively. Soil amendments altered the microbial diversity. Fourier-transform infrared spectroscopy and X-ray diffraction reported no obvious changes, except saponin application, which led to possible release of HMs in soil. The fresh weight of Symphytum officinale increased by 21.3 and 5.50% in T2 and T3, respectively. Chlorophyll (a) and carotenoid decreased by the sole application of B. subtilis and saponin and vice-versa for chlorophyll (b). Mono-application of B. subtilis efficiently increased the peroxidase (POD: 27%) and polyphenol oxidase (PPO: 13.56%), whereas, co-application enhanced the phenylalanine ammonia-lyase (PAL: 6.50%) level in shoots. Zn concentration in the shoots and roots declined by 12.75 and 27.32% in T1, respectively. Cd increased (3.92%, T3) in shoots and decreased (39.25%, T1) in roots; Pb concentration remained below detection in shoots and increased by 40% (T3) in roots due to accumulation in dead cells and cell vacuoles. Overall, B. subtilis and saponin influenced the bioavailability of HMs, enzymatic activities, and bacterial abundance in the soil; plant growth indicators, antioxidants activities, and metal uptake in shoots and roots.
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Affiliation(s)
- Yiman Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Amjad Ali
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China; School of Environmental and Municipal Engineering, Xian University of Architecture and Technology, Xian, 715000, China.
| | | | - Muhammad Azeem
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Anum Tabassum
- Department of Microbiology, Women University, Mardan, 23200, Pakistan
| | - Di Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China
| | - Ishaq Ahmad Mian
- Department of Soil and Environmental Sciences, The University of Agriculture, Peshawar, 2500, Pakistan
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, China.
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7
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Leng Y, Lu M, Li F, Yang B, Hu ZT. Citric acid-assisted phytoextraction of trace elements in composted municipal sludge by garden plants. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 288:117699. [PMID: 34271519 DOI: 10.1016/j.envpol.2021.117699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/19/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
Sludge landscaping after compost stabilization is a popular recycling process; however, until trace elements (TEs) are extracted by plants and reduced to safe concentrations, they present a potential exposure risk. Three garden plants, Liriope platyphylla Wang et Tang (L. platyphylla), Iris tectorum Maxim (I. tectorum), and Photinia x fraseri Dress (P. x fraseri), were selected for field experiments, and their ability to phytoremediate TEs and the promotion effect of citric acid (CA) were studied over 3 months of observation. Among the three kinds of plants, L. platyphylla had the highest biomass per unit soil area, and the CA treatment further increased the biomass of this plant per unit soil area as well as the uptake of TEs. When treated with 3 mmol kg-1 CA, L. platyphylla showed increases in the bioconcentration factors of Cu, Zn, Pb, and Cd by 24%, 63%, 27%, and 123%, respectively. Because of the large biomass and high concentrations of TEs, L. platyphylla had high phytoremediation indexes for Zn, Cu, Pb, Ni, and Cd, which reached 18.5, 3.7, 3.2, 2.2, and 0.4 mg m-2, respectively, and were further improved by 60%-187% by the CA treatment. These advantages indicate the potential usefulness of L. platyphylla for phytoremediation. The results provide basic data and technical support for the use of sludge-based compost and phytoremediation by garden plants.
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Affiliation(s)
- Yaling Leng
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Minying Lu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Feili Li
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
| | - Boxuan Yang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Zhong-Ting Hu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China; Zhejiang PUZE Environmental Protection Technology Pte Ltd, Ningbo, 315301, China
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Yang Q, Yang C, Yu H, Zhao Z, Bai Z. The addition of degradable chelating agents enhances maize phytoremediation efficiency in Cd-contaminated soils. CHEMOSPHERE 2021; 269:129373. [PMID: 33387792 DOI: 10.1016/j.chemosphere.2020.129373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/04/2020] [Accepted: 12/16/2020] [Indexed: 05/27/2023]
Abstract
Chelating agent-induced phytoremediation is a viable approach to completely remove heavy metals from soil. However, little attention has been paid to the interaction mechanisms between the concentration of the chelating agent and the application time on the physiological and biochemical properties of soil and plants. In this study, five chelating agents, namely ethylenediamine tetraacetic acid (EDTA), diethylenetriacetic acid (NTA), tetrasodium N, N-diacetate (GLDA), aspartate dibutyric acid ether (AES), and iminodisuccinic acid (IDSA), were used to support phytoremediation with maize and to explore the removal effect of Cd in soil. The results showed that chelating agent concentrations of 9 mmol kg-1 significantly reduced the biomass of maize. Treatment with AES at a dose of 6 mmol kg-1 significantly increased aboveground biomass, reaching a maximum of 0.92 g pot-1 in all treatments. At an AES concentration of 6 mmol kg-1, the highest shoot and root Cd levels of 7.79 and 9.86 mg kg-1, respectively, were observed, which were 3.05 and 1.60 times higher than those of the control. Total Cd extraction followed the order AES (6 mmol kg-1) > GLDA > NTA > EDTA > IDSA (3 mmol kg-1). Chelating agent treatment significantly increased the activity of antioxidant enzymes and promoted plant growth. The self-degradation of AES significantly reduced soil pH, increased soil Cd activity, and promoted Cd uptake and transportation in maize.
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Affiliation(s)
- Qiao Yang
- College of Land Science and Technology, China University of Geosciences, Beijing, No.29, Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Chen Yang
- School of Water Resources and Environment, China University of Geosciences, Beijing, No.29, Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Hao Yu
- College of Land Science and Technology, China University of Geosciences, Beijing, No.29, Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Zhongqiu Zhao
- College of Land Science and Technology, China University of Geosciences, Beijing, No.29, Xueyuan Road, Haidian District, Beijing, 100083, China; Key Laboratory of Land Consolidation and Rehabilitation Ministry of Land and Resources, Beijing, 100035, China.
| | - Zhongke Bai
- College of Land Science and Technology, China University of Geosciences, Beijing, No.29, Xueyuan Road, Haidian District, Beijing, 100083, China; Key Laboratory of Land Consolidation and Rehabilitation Ministry of Land and Resources, Beijing, 100035, China
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9
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Li FL, Qiu Y, Xu X, Yang F, Wang Z, Feng J, Wang J. EDTA-enhanced phytoremediation of heavy metals from sludge soil by Italian ryegrass (Lolium perenne L.). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 191:110185. [PMID: 31986455 DOI: 10.1016/j.ecoenv.2020.110185] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 05/22/2023]
Abstract
Landscaping of sludge is a kind of recycling disposal, but the potential heavy metal risks limit its application. In this paper, the sludge soil was remediated by ryegrass, and the effect of ethylene diamine tetraacetic acid (EDTA) was studied through pot experiments. Italian ryegrass was planted in the sludge soil treated with six gradients concentrations of 0, 1, 2, 3, 4, 5 mmol kg-1 of EDTA, and the planting conditions were kept the same. After 45 days of planting, compared with the control group (without EDTA treated), the application of 1-5 mmol kg-1 EDTA decreased ryegrass biomass by 2-43%, reduced soil pH value by 0.21-0.34 unit, and reduced 4.1-9.7% capacity of exchange cation, but increased 1.4-8.6% soil organic matter. After growing ryegrass, the contents of heavy metals decreased by 10% for Cu, 15% for Zn, 6% for Ni, 14% for Cd and 44% for Pb; and after spraying EDTA decreased again by 33% for Cu, 31% for Zn, 56% for Ni, 24% for Cd, and 68% for Pb. In ryegrass, the uptake heavy metals were enhanced, and bio-concentration factor of Cu, Zn, Ni, Cd, and Pb of EDTA treated groups were 1.9, 1.6, 4.1, 2.7, and 4.8 times of the control group, respectively. However, EDTA only significantly increased transfer factor values of Cu and Zn, and made bio-extraction factor value of Cu greater than 1. The remediation factor values were used to comprehensive assess accumulation capacity of heavy metals by ryegrass under EDTA treating, and they ordered in Zn > Cu > Ni > Cd > Pb, and the best dose was 2 mmol kg-1 EDTA. Prediction models for bio-concentration factor were established by using stepwise multiple linear regression, explaining 94.9-99.3% of the corresponding elements with soil organic matter, EDTA dosage, and/or pH value (p < 0.005). This paper provided effective heavy metals remediation data for municipal sludge landscape and the prediction models.
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Affiliation(s)
- Fei-Li Li
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
| | - Yuehua Qiu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Xinyang Xu
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Feng Yang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Zhiwei Wang
- Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Jianru Feng
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jiade Wang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
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Hu Z, Zhang Y, He Y, Cao Q, Zhang T, Lou L, Cai Q. Full-Length Transcriptome Assembly of Italian Ryegrass Root Integrated with RNA-Seq to Identify Genes in Response to Plant Cadmium Stress. Int J Mol Sci 2020; 21:ijms21031067. [PMID: 32041113 PMCID: PMC7037684 DOI: 10.3390/ijms21031067] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 02/02/2020] [Accepted: 02/04/2020] [Indexed: 12/13/2022] Open
Abstract
Cadmium (Cd) is a toxic heavy metal element. It is relatively easily absorbed by plants and enters the food chain, resulting in human exposure to Cd. Italian ryegrass (Lolium multiflorum Lam.), an important forage cultivated widely in temperate regions worldwide, has the potential to be used in phytoremediation. However, genes regulating Cd translocation and accumulation in this species are not fully understood. Here, we optimized PacBio ISO-seq and integrated it with RNA-seq to construct a de novo full-length transcriptomic database for an un-sequenced autotetraploid species. With the database, we identified 2367 differentially expressed genes (DEGs) and profiled the molecular regulatory pathways of Italian ryegrass with Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis in response to Cd stress. Overexpression of a DEG LmAUX1 in Arabidopsis thaliana significantly enhanced plant Cd concentration. We also unveiled the complexity of alternative splicing (AS) with a genome-free strategy. We reconstructed full-length UniTransModels using the reference transcriptome, and 29.76% of full-length models had more than one isoform. Taken together, the results enhanced our understanding of the genetic diversity and complexity of Italian ryegrass under Cd stress and provided valuable genetic resources for its gene identification and molecular breeding.
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Yan X, Liu C, Zhong L, Wang J. Combining phytoremediation with soil flushing for arsenic removal from contaminated soil. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:1229-1235. [PMID: 31274022 DOI: 10.1080/15226514.2018.1460309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Arsenic (As) contamination poses a high risk to public health in China. Remediation of soil As contamination is an urgent need. Development of more effective remediation technologies is crucial in order to achieve remediation goals. In this study, pot experiments were carried out to study the As removal effectiveness of planting Pteris vittata L. (P.v.) and Lolium multiflorum L. (L.m.) in combination with in situ soil flushing using monopotassium phosphate (KH2PO4) solutions. Results showed that planting P.v. and L.m. in combination with 8 days of KH2PO4 solution soil flushing achieved 35.20% and 52.93%. As removal efficiency in the rhizosphere soil, respectively, which was significantly higher than 9.14% removal from soil flushing alone. Results also indicated that planting P.v. and L.m. changed the speciation of As to labile form, facilitating As removal from soil. Growing P.v. with in situ KH2PO4 flushing was more effective in remediating As-contaminated agricultural soil; L.m. could not be used in place of P.v to achieve the same remediation efficiency. This research provides an important guidance on plant screening for phytoremediation in combination with in situ flushing to remediate As-contaminated soil.
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Affiliation(s)
- Xiulan Yan
- a Office of Environmental Geography and Human Health, Key Laboratory of Land Surface Pattern and Simulation , Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing , China
| | - Chuchen Liu
- a Office of Environmental Geography and Human Health, Key Laboratory of Land Surface Pattern and Simulation , Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing , China
- b University of Chinese Academy of Sciences , Beijing , China
| | - Lirong Zhong
- c Energy and Environment Directorate , Pacific Northwest National Laboratory , Richland , WA , USA
| | - Jianyi Wang
- a Office of Environmental Geography and Human Health, Key Laboratory of Land Surface Pattern and Simulation , Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing , China
- b University of Chinese Academy of Sciences , Beijing , China
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Smułek W, Zdarta A, Pacholak A, Zgoła-Grześkowiak A, Marczak Ł, Jarzębski M, Kaczorek E. Saponaria officinalis L. extract: Surface active properties and impact on environmental bacterial strains. Colloids Surf B Biointerfaces 2016; 150:209-215. [PMID: 27918965 DOI: 10.1016/j.colsurfb.2016.11.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 11/03/2016] [Accepted: 11/25/2016] [Indexed: 11/28/2022]
Abstract
Plant-derived surfactants are characterised by low toxicity, high biodegradability and environmental compatibility. They therefore have many applications; for instance, they can be used in bioremediation to accelerate biodegradation processes, especially of hydrophobic pollutants. This paper analyses the properties of an extract from Saponaria officinalis L. containing saponins and its impact on bacterial strains isolated from soil, as well as its potential for application in hydrocarbon bioremediation. The tested extract from Saponaria officinalis L. contains gypsogenin, hederagenin, hydroxyhederagenin and quillaic acid aglycone structures and demonstrates good emulsification properties. Contact with the extract led to modification of bacterial cell surface properties. A decrease in cell surface hydrophobicity and an increase in membrane permeability were recorded in the experiments. An increase of up to 63% in diesel oil biodegradation was also recorded for Pseudomonas putida DA1 on addition of 1gL-1 of saponins from Saponaria officinalis L. Saponaria extract showed no toxic impact on the tested environmental bacterial strains at the concentration used in the biodegradation process.
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Affiliation(s)
- Wojciech Smułek
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
| | - Agata Zdarta
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
| | - Amanda Pacholak
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
| | - Agnieszka Zgoła-Grześkowiak
- Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
| | - Łukasz Marczak
- European Centre for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Maciej Jarzębski
- NanoBioMedical Centre, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland; Department of Physical Chemistry and Physicochemical Basis of Environmental Engineering Institute of Environmental Engineering Off-Campus Faculty of Low and Social Sciences in Stalowa Wola Catholic University of Lublin, Kwiatkowskiego 3A, 37-450 Stalowa Wola, Poland
| | - Ewa Kaczorek
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland.
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