1
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Yan B, Lan T, Lv Y, Xing C, Liang Y, Wang H, Wu Q, Guo L, Guo WQ. Enhancing simultaneous nitrogen and phosphorus availability through biochar addition during Chinese medicinal herbal residues composting: Synergism of microbes and humus. Sci Total Environ 2024; 930:172515. [PMID: 38642759 DOI: 10.1016/j.scitotenv.2024.172515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 04/10/2024] [Accepted: 04/14/2024] [Indexed: 04/22/2024]
Abstract
The disposal of Chinese medicinal herbal residues (CMHRs) derived from Chinese medicine extraction poses a significant environmental challenge. Aerobic composting presents a sustainable treatment method, yet optimizing nutrient conversion remains a critical concern. This study investigated the effect and mechanism of biochar addition on nitrogen and phosphorus transformation to enhance the efficacy and quality of compost products. The findings reveal that incorporating biochar considerably enhanced the process of nutrient conversion. Specifically, biochar addition promoted the retention of bioavailable organic nitrogen and reduced nitrogen loss by 28.1 %. Meanwhile, adding biochar inhibited the conversion of available phosphorus to non-available phosphorus while enhancing its conversion to moderately available phosphorus, thereby preserving phosphorus availability post-composting. Furthermore, the inclusion of biochar altered microbial community structure and fostered organic matter retention and humus formation, ultimately affecting the modification of nitrogen and phosphorus forms. Structural equation modeling revealed that microbial community had a more pronounced impact on bioavailable organic nitrogen, while humic acid exerted a more significant effect on phosphorus availability. This research provides a viable approach and foundation for regulating the levels of nitrogen and phosphorus nutrients during composting, serving as a valuable reference for the development of sustainable utilization technologies pertaining to CMHRs.
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Affiliation(s)
- Bo Yan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Tian Lan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yang Lv
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chuanming Xing
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yongqi Liang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Huazhe Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Qinglian Wu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Liang Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wan-Qian Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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2
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Su Y, Zhou L, Zhuo Q, Fang C, You J, Han L, Huang G. Microbial mechanisms involved in negative effects of amoxicillin and copper on humification during composting of dairy cattle manure. Bioresour Technol 2024; 399:130623. [PMID: 38518876 DOI: 10.1016/j.biortech.2024.130623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 03/24/2024]
Abstract
Livestock manure often contains various pollutants. The aim of this study was to investigate how adding amoxicillin (AMX), Cu, and both AMX and Cu (ACu) affected humification during composting and the microbial mechanisms involved. The cellulose degradation rates were 16.96%, 10.86%, and 9.01% lower, the humic acid contents were 18.71%, 12.89%, and 16.78% lower, and the humification degrees were 24.72%, 24.16%, and 15.73% lower for the AMX, Cu, and ACu treatments, respectively, than the control. Adding AMX and Cu separately or together inhibited humic acid formation and decreased the degree of humification, but the degree of humification was decreased less by ACu than by AMX or Cu separately. The ACu treatment decreased the number of core bacteria involved in humic acid formation and decreased carbohydrate and amino acid metabolism during the maturing period, and thereby delayed humic acid formation and humification. The results support composting manure containing AMX and Cu.
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Affiliation(s)
- Ya Su
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Ling Zhou
- Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region, Xinjiang 843300, China
| | - Qianting Zhuo
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Chen Fang
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China; College of Agriculture, Guizhou University, Guiyang, Guizhou Province 550025, China
| | - Jia You
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Lujia Han
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China
| | - Guangqun Huang
- Engineering Laboratory for AgroBiomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing 100083, China.
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3
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Block JB, Michels M, Mußhoff O, Hermann D. How to reduce the carbon footprint of the agricultural sector? Factors influencing farmers' decision to participate in carbon sequestration programs. J Environ Manage 2024; 359:121019. [PMID: 38701586 DOI: 10.1016/j.jenvman.2024.121019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 04/17/2024] [Accepted: 04/23/2024] [Indexed: 05/05/2024]
Abstract
Mitigating climate change by sequestering carbon in agricultural soils through humus formation is a crucial component of sustainable agriculture. Humus programs that are designed to incentivize farmers to build more humus are still recent innovations, so current knowledge about farmers' motivation to participate is limited. This study examines the adoption of non-governmental humus programs to promote carbon sequestration by analyzing farmers' willingness to participate in humus programs and influential factors. We specifically investigate behavioral factors underlying farmers' adoption of humus programs using the Theory of Planned Behavior. To this end, we collected data using an online survey with 190 German farmers and applied partial least squares structural equation modeling. The results show that (i) perceived economic benefits, (ii) the actions of fellow farmers, and (iii) farmers' sense of responsibility with regard to climate change have a statistically significant influence on farmers' intention to participate in a humus program. In contrast, the perceived ecological benefits, political pressure, the possibility of establishing humus-building measures, and prior knowledge of humus programs have no statistically significant influence. Our findings suggest that farmers' decision to participate in humus programs is strongly influenced by the financial benefits, but the actions and thoughts of other farmers, as well as their own moral claims regarding climate change, also play a crucial role. We found that farmers lack knowledge about the registration and general functioning of humus programs, which can currently be one of the biggest barriers to participation in such initiatives.
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Affiliation(s)
- Julia B Block
- Department of Agricultural Economics and Rural Development, Georg-August-University Goettingen, Platz der Goettinger Sieben 5, 37073, Goettingen, Germany.
| | - Marius Michels
- Department of Agricultural Economics and Rural Development, Georg-August-University Goettingen, Platz der Goettinger Sieben 5, 37073, Goettingen, Germany.
| | - Oliver Mußhoff
- Department of Agricultural Economics and Rural Development, Georg-August-University Goettingen, Platz der Goettinger Sieben 5, 37073, Goettingen, Germany.
| | - Daniel Hermann
- Institute for Food- and Resource Economics, Rheinische Friedrich-Wilhelms-University Bonn, Nussallee 19, 53115, Bonn, Germany.
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Dong S, Wei Y, Yu Q, Gao Y, Chen H, Zhou K, Cheng M, Wang B, Wei Y, Hu X. Inoculating functional bacteria improved the humification process by regulating microbial networks and key genera in straw composting by adding different nitrogen sources. Bioresour Technol 2024; 393:130022. [PMID: 37979883 DOI: 10.1016/j.biortech.2023.130022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/04/2023] [Accepted: 11/12/2023] [Indexed: 11/20/2023]
Abstract
The aim of this study was to compare the effect of functional inoculant and different nitrogen sources on the relationship among lignocellulose, precursors, and humus as well as their interactions with bacterial genera in straw composting. Results showed that inoculation improved the heating process and retained more nitrate compared to control. Inoculation increased the degradation of lignocellulosic components by 26.9%-81.6% and the formation of humus by 15.7%-23.0%. Bioinformatics analysis showed that inoculation enriched key genera Chryseolinea in complex nitrogen source (pig manure) compost and Pusillimas, Luteimonas, and Flavobacteria in single nitrogen source (urea) compost, which were related to humus formation. Network analysis found that inoculation and urea addition improved the microbial synergistic effect and inoculation combined with pig manure had more complex modularity and interactions. Combining the functional bacterial inoculant with urea helped to enhance the degradation of lignocellulose and humification process during straw composting especially with single nitrogen source.
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Affiliation(s)
| | - Yiyang Wei
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Qi Yu
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Yunfei Gao
- Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Heshu Chen
- Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Kaiyun Zhou
- College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, 100193 Beijing, China
| | - Meidi Cheng
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Bo Wang
- Institute of Animal Nutrition and Feed, Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China
| | - Yuquan Wei
- College of Resources and Environmental Science, Beijing Key Laboratory of Biodiversity and Organic Farming, China Agricultural University, 100193 Beijing, China
| | - Xiaomei Hu
- College of Life Science, Northeast Agricultural University, Harbin 150030, China.
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Zhang S, Zhang Q, Gao H, Wang L, Song C, Tang G, Li X, Hu X. Effects of adding steel slag on humification and characteristics of bacterial community during phosphate-amended composting of municipal sludge. Bioresour Technol 2024; 394:130229. [PMID: 38135223 DOI: 10.1016/j.biortech.2023.130229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 12/24/2023]
Abstract
This study aimed to investigate the effects of different proportions (0%, 5%, 7.5%, and 10%) of steel slag (SS) on humification and bacterial community characteristics during phosphate-amended composting of municipal sludge. Compared with adding KH2PO4 alone, co-adding SS significantly promoted the temperature, pH, nitrification, and critical enzyme activities (polyphenol oxidase, cellulase, laccase); especially organic matter (OM) degradation rate (25.5%) and humification degree (1.8) were highest in the 5%-SS treatment. Excitation-emission matrix-parallel factor confirmed that co-adding SS could promote the conversion of protein-like substances or microbial by-products into humic-like substances. Furthermore, adding 5%-SS significantly improved the relative abundances of Actinobacteria, Firmicutes and the genes related to carbohydrate and amino acid metabolism, and enhanced the interactions of bacterial community in stability and complexity. The partial least squares path model indicated that OM was the primary factor affecting humification. These results provided a promising strategy to optimize composting of municipal sludge via SS.
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Affiliation(s)
- Shihua Zhang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China.
| | - Qicheng Zhang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Heyu Gao
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Liujian Wang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Chunqing Song
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Gang Tang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Xiumin Li
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Xiaobing Hu
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui 243032, China
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6
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Xing CM, He ZL, Lan T, Yan B, Zhao Q, Wu QL, Wang HZ, Wang CX, Guo WQ. Enhanced humus synthesis from Chinese medicine residues composting by lignocellulose-degrading bacteria stimulation: Upregulation of key enzyme activity and neglected indirect effects on humus formation. Sci Total Environ 2024; 907:167754. [PMID: 37879479 DOI: 10.1016/j.scitotenv.2023.167754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/19/2023] [Accepted: 10/09/2023] [Indexed: 10/27/2023]
Abstract
Chinese medicine residues (CMHRs) resource is attracting widespread attention, as it is expected to be produced into Humus-rich fertilizer for soil application. This study aimed to promote effective humus (HS) production through lignocellulose-degrading bacteria (LDB) addition and explore the biological regulation mechanism of LDB affecting lignocellulose-to-humus conversion. The results showed higher HS production was achieved, with 109.73 and 111.44 g·kg-1, and HA/FA was raised by 12.70-16.02 % in compost products by LDB addition stimulation. Significant upregulation of β-glucanase and xylanase activities catalyzed higher decomposition of lignocellulose toward more HS potential precursors supply. Furthermore, exogenous LDB intervention induced microbial community restructure and microbial network establishment via enriching synergism functional bacteria, i.e., Thermobifida, Paenibacillus, Nonomuraea, etc. Mantel test results showed that it was variation of cellulose, hemicellulose and HS that affected microbial community succession (p < 0.01, r > 0.6), which represented the positive action of LDB addition stimulation on HS synthesis upregulation. Further exploration suggested LDB had an indirect effect on HS formation by enhanced lignin and hemicellulose conversion based on the Random Forest model and Partial least-squares path modeling results. This research provides new insights into the trigger effects of LDB introduction on upregulating HS synthesis and is expected to propose new perspectives for HS efficient production in CMHRs composting.
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Affiliation(s)
- Chuan-Ming Xing
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Zi-Lin He
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Tian Lan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Bo Yan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qi Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qing-Lian Wu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hua-Zhe Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Cai-Xia Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Wan-Qian Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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7
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Wang Y, Wang J, Yi G, Wu X, Zhang X, Yang X, Ho Daniel Tang K, Xiao R, Zhang Z, Qu G, Li R. Sulfur-aided aerobic biostabilization of swine manure and sawdust mixture: Humification and carbon loss. Bioresour Technol 2023; 387:129602. [PMID: 37536465 DOI: 10.1016/j.biortech.2023.129602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/26/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
To investigate how sulfur addition affects humification and carbon loss during swine manure (SM) biostabilisation, various proportions of sulfur, i.e., 0 (CK), 0.2%-0.8% (S1-S4) were added to SM in a 70-day pilot-scale test. Compared to CK (16.07%), sulfur addition resulted in the mineralization of 17.05%-24.27% of the total organic carbon. Sulfur addition also reduced CH4 emissions, which were 3.7%-29.3% lower than that of CK. The total global warming potential values were in the range of 913.1-968.2 g CO2 eq kg-1 for all treatments. Although the sulfur-added treatments showed lower HA/FA ratios than CK after 70 days, no significant impact on the maturity of the final products was observed. Sulfur addition impacted the microbial community, CH4, CO2, N2O emissions, and affected the variation of temperature in biowaste biostabilization. These discoveries provided an important basis for understanding the function of sulfur in regulating the aerobic bio-decomposition of organic waste.
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Affiliation(s)
- Yang Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jingwen Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Guorong Yi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xuan Wu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiu Zhang
- North Minzu University Ningxia Key Laboratory for the Development and Application of Microbial Resources in Extreme Environments, Yinchuan 750021, China
| | - Xu Yang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Kuok Ho Daniel Tang
- The University of Arizona, The Department of Environmental Science, Shantz Building Rm 4291177 E 4th St., Tucson, AZ 85721, USA
| | - Ran Xiao
- College of Resources and Environment, Southwest University, Chongqing 400715, China
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Low-carbon Green Agriculture in Northwestern China, Ministry of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China
| | - Guangzhou Qu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Low-carbon Green Agriculture in Northwestern China, Ministry of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Low-carbon Green Agriculture in Northwestern China, Ministry of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China.
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8
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Li S, Xu S, Chen S, Zhang H, Zhan Y, Jia K, Cheng M, Wei Y. Carbon-containing additives changes the phosphorus flow by affecting humification and bacterial community during composting. Bioresour Technol 2023; 379:129066. [PMID: 37075850 DOI: 10.1016/j.biortech.2023.129066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/10/2023] [Accepted: 04/16/2023] [Indexed: 05/03/2023]
Abstract
Phosphorus recycling from organic wastes to prepare a fertilizer by composting is promising. The aim of this study was to compare the effect of diverse carbon-containing additives (T1, glucose; T2, biochar; T3, woody peat) on phosphorus (P) fractions transformations, humus formation and bacterial community succession in chicken manure composting. Results showed that orthophosphate monoester was significantly related to the humification process, and glucose or woody peat addition increased the P in humus. Lentibacillus was a key carbon cycle bacteria related to organics stabilization affected by carbon-containing additives. Redundancy analysis and variation partitioning indicated that phosphatase enzyme activity driven by bacterial community and humic substance had 59.7% contribution to P fractions dynamics. The findings highlight an efficient humus-regulation P stabilization way, notably in composting adding glucose to form humus with a better binding ability to labile P forms and phosphatase.
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Affiliation(s)
- Shuxin Li
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China
| | - Shaoqi Xu
- College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou 215100, China
| | - Shuo Chen
- College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou 215100, China
| | - Hao Zhang
- Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China
| | - Yabin Zhan
- College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou 215100, China
| | - Kaixue Jia
- College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Meidi Cheng
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Yuquan Wei
- College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou 215100, China.
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9
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Piao M, Li A, Du H, Sun Y, Du H, Teng H. A review of additives use in straw composting. Environ Sci Pollut Res Int 2023; 30:57253-57270. [PMID: 37012566 DOI: 10.1007/s11356-023-26245-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 02/27/2023] [Indexed: 05/10/2023]
Abstract
Straw composting is not only a process of decomposition and re-synthesis of organic matter, but also a process of harmless treatment, avoiding air pollution caused by straw burning. Many factors, including raw materials, humidity, C/N, and microbial structure, may determine the composting process and the quality of final product. In recent years, many researches have focused on composting quality improvement by adding one or more exogenous substances, including inorganic additives, organic additives, and microbial agents. Although a few review publications have compiled the research on the use of additives in composting, none of them has specifically addressed the composting of crop straw. Additives used in straw composting can increase degradation of recalcitrant substances and provide ideal living surroundings for microorganism, and thus reduce nitrogen loss and promote humus formation, etc. This review's objective is to critically evaluate the impact of various additives on straw composting process, and analyze how these additives enhance final quality of composting. Furthermore, a vision for future perspectives is provided. This paper can serve as a reference for straw composting process optimization and composting end-product improvement.
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Affiliation(s)
- Mingyue Piao
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, China
- College of Engineering, Jilin Normal University, Siping, China
| | - Ang Li
- College of Engineering, Jilin Normal University, Siping, China
| | - Huishi Du
- College of Tourism and Geographical Science, Jilin Normal University, Siping, China
| | - Yuwei Sun
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, China
- College of Engineering, Jilin Normal University, Siping, China
| | - Hongxue Du
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, China
| | - Honghui Teng
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, China.
- College of Engineering, Jilin Normal University, Siping, China.
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10
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Liu C, Zhuang J, Xue J, Peng M, Zhang W, Mao L. Passivation mechanism of Cu and Zn with the introduction of composite passivators during anaerobic digestion of pig manure. Bioresour Technol 2023; 369:128360. [PMID: 36423767 DOI: 10.1016/j.biortech.2022.128360] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
Heavy metals in livestock manure pose a threat to the environment after biogas fertilizer being utilized, while its bioavailability is reduced substantially by passivator during the anaerobic digestion. In this study, an optimal composite passivator of humic acid, fly ash and biochar with proportion of 7.5%:7.5%:7.5% and 5.0%:7.5%:7.5% is obtained and the passivation mechanism on Cu and Zn during anaerobic digestion of pig manure is explored. The content of humic acid (HA) in biogas residue increased by 15.66-27.82%, which promoted the transformation from FA-Cu/Zn to HA-Cu/Zn and was beneficial to the passivation of Cu and Zn. The bioavailability of Cu and Zn was reduced by the adsorption and complexation at the early and middle stages of anaerobic digestion. Humic substances play a major role in the passivation of heavy metals at the late stage. The composite passivator can improve the humification degree of biogas residue and reduce heavy metal biotoxicity.
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Affiliation(s)
- Cunlan Liu
- School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China
| | - Jie Zhuang
- School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China
| | - Jinhui Xue
- School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China
| | - Mingguo Peng
- School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China
| | - Wenyi Zhang
- School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China.
| | - Linqiang Mao
- School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China.
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11
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Flem B, Reimann C, Fabian K. Excess Cr and Ni in top soil: Comparing the effect of geology, diffuse contamination, and biogenic influence. Sci Total Environ 2022; 843:157059. [PMID: 35780883 DOI: 10.1016/j.scitotenv.2022.157059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/23/2022] [Accepted: 06/25/2022] [Indexed: 06/15/2023]
Abstract
Chromium (Cr) and nickel (Ni) are among the elements that are most mined, processed and used in modern industry and society. A realistic estimate of the diffuse contamination that has left a footprint on soil during the last 200 years by worldwide industrialization requires recognition and assessment of the dominant natural and anthropogenic sources. The relations between geogenic, anthropogenic, and biogenic Cr and Ni sources are estimated from eight large-scale geochemical surveys, by comparing the cumulative distribution functions (CDF) of the elements in top- and sub soil using cumulative probability (CP) diagrams. This method makes it possible to estimate the effect of long-term diffuse contamination on soil without monitoring. The method offers a cheaper and more reliable method for estimating diffuse contamination at the continental to regional scale than classical monitoring methods. The impact of diffuse contamination can be recognized at the low-concentration end while strong local contamination is shown as a distort at the high-concentration end of the distribution. Chromium, due to its structural similarities with essential nutrients, shows a clear biological signal in the CP-diagram. The bio-adjustment of Cr and Ni limits the accuracy of the diffuse contamination estimates. Combining CDF analysis with spatial mapping provides insight into the dominant contamination processes that distort the top soil CDF relative to the sub soil CDF. For both elements, a diffuse contamination signal of <1 mg/kg is obtained for soils at the European scale. Agricultural soil is affected by contamination from farming practices and shows higher excess Cr and Ni in top soil than forest soil. Although the world has faced several centuries of industrial development and Cr and Ni are used "everywhere", this is not reflected in surface soil at the continental to regional scale. The regional distribution of both elements is dominated by natural sources and processes.
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Affiliation(s)
- Belinda Flem
- Geological Survey of Norway, 6315, Torgarden, N-7491 Trondheim, Norway.
| | - Clemens Reimann
- Geological Survey of Norway, 6315, Torgarden, N-7491 Trondheim, Norway; Meiselstrasse 14/51, A-1150, Wien, Austria
| | - Karl Fabian
- Norwegian University of Science and Technology (NTNU), S. P. Andersens veg 15a, 7031 Trondheim, Norway
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12
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Wang L, Chi Y, Du K, Zhou Z, Wang F, Huang Q. Hydrothermal treatment of food waste for bio-fertilizer production: Formation and regulation of humus substances in hydrochar. Sci Total Environ 2022; 838:155900. [PMID: 35588799 DOI: 10.1016/j.scitotenv.2022.155900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/26/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Food waste (FW) poses serious challenges to incineration and composting. Hydrothermal treatment (HTT) is a promising method to produce carbon-rich materials from biomass, including humus substances. In this study, FW containing cellulose, starches, and proteins was treated by HTT to study the formation and regulation of three kinds of humus (i.e., humin, humic acids [HAs], and fulvic acids [FAs]). Ultimate analysis and proximate analyses were conducted to explore the material composition, which was very similar to natural humus. Three kinds of humus were quantified. Optimal temperature (200 °C) and residence time (30 min) for production of HAs were determined based on HAs yield (14.60%). In addition, formation and regulation of humin, HAs and FAs was discussed. The amino acids, peptides, monosaccharides, and HMF obtained by hydrolysis of FW produced important precursors of humus. Moreover, the transfer of nutrient elements was revealed. Nearly 90% of K was dissolved in water. Recovery of N (60%) was relatively stable in hydrochar. Up to 67.61% of P deposited in hydrochar with 12 h.
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Affiliation(s)
- Lixian Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Yong Chi
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Kun Du
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Zhaozhi Zhou
- Zhejiang Development & Planning Institute, Hangzhou, China.
| | - Fei Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
| | - Qunxing Huang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
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13
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Xing R, Yang X, Sun H, Ye X, Liao H, Qin S, Chen Z, Zhou S. Extensive production and evolution of free radicals during composting. Bioresour Technol 2022; 359:127491. [PMID: 35724905 DOI: 10.1016/j.biortech.2022.127491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/11/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
The production of free radicals has been widely documented in natural systems, where they play an important role in most organic matter and contaminants transformation. Here, the production and evolution of free radicals were systematically investigated during composting. Results indicated that multiple reactive oxygen species and environmentally persistent free radicals (G-factor 2.003-2.004) were generated with dynamic changes during composting. The ·OH yield fluctuated significantly with a maximum content of 365.7-1,262.3 μmol/kg at the thermophilic phase of composting, which was closely correlated with the changes of Fe (II) (Pearson's r = 0.928-0.932) and the electron-donating capacity of humus (Pearson's r = 0.958-0.896) during composting. Further investigation suggested that microorganisms driven iron/humus redox conversion could contribute to the production and dynamic changes of free radical during composting. These findings highlight the abiotic processes involving free radicals, and provide a new perspective for humification and contaminants removal during composting.
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Affiliation(s)
- Ruizhi Xing
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xinggui Yang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hanyue Sun
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaoyu Ye
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hanpeng Liao
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shuping Qin
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhi Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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14
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Wang X, Tian L, Li Y, Zhong C, Tian C. Effects of exogenous cellulose-degrading bacteria on humus formation and bacterial community stability during composting. Bioresour Technol 2022; 359:127458. [PMID: 35700902 DOI: 10.1016/j.biortech.2022.127458] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/04/2022] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
This study aimed to reveal the potential mechanism of influence exogenous cellulose-degrading bacteria (ECDB) exerted on humus synthesis during the co-composting of corn straw and cattle manure. By measuring the changes in physicochemical factors and bacterial communities, it was revealed that inoculation with ECDB enhanced the driving force of cellulose degradation and humus synthesis. ECDB not only directly participated in cellulose degradation as degrading bacteria, but also changed the bacterial community succession, and increased the abundance of bacterial communities associated with cellulose degradation. The results showed that ECDB stimulated the potential functions and interactions of bacterial communities. Structural equation modeling confirmed that ECDB acted mainly as a bioactivator to promote humus formation in co-composting of corn straw and cattle manure. Taken together, these findings offered new strategies which can be effectively utilized to increase the efficiency and quality of corn straw composting.
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Affiliation(s)
- Xinguang Wang
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Lei Tian
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin, China
| | - Yingxin Li
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin, China
| | - Cheng Zhong
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Chunjie Tian
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin, China.
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15
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Li Z, Dong D, Zhang L, Li Y, Guo Z. Effect of fulvic acid concentration levels on the cleavage of piperazinyl and defluorination of ciprofloxacin photodegradation in ice. Environ Pollut 2022; 307:119499. [PMID: 35597482 DOI: 10.1016/j.envpol.2022.119499] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 05/03/2022] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
Ice is an important physical and chemical sink for various pollutants in cold regions. The photodegradation of emerging fluoroquinolone (FQ) antibiotic contaminants with dissolved organic matter (DOM) in ice remains poorly understood. Here, the photodegradation of ciprofloxacin (CIP) and fulvic acid (FA) in different proportions as representative FQ and DOM in ice were investigated. Results suggested that the photodegradation rate constant of CIP in ice was 1.9 times higher than that in water. When CFA/CCIP ≤ 60, promotion was caused by FA sensitization. FA increased the formation rate of cleavage in the piperazine ring and defluorination products. When 60 < CFA/CCIP < 650, the effect of FA on CIP changed from promoting to inhibiting. When 650 ≤ CFA/CCIP ≤ 2600, inhibition was caused by both quenching effects of 143.9%-51.3% and light screening effects of 0%-48.7%. FA inhibited cleavage in the piperazine ring for CIP by the scavenging reaction intermediate of aniline radical cation in ice. When CFA/CCIP > 2600, the light screening effect was greater than the quenching effect. This work provides new insights into how DOM affects the FQ photodegradation with different concentration proportions, which is beneficial for understanding the environmental behaviors of fluorinated pharmaceuticals in cold regions.
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Affiliation(s)
- Zhuojuan Li
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Deming Dong
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Liwen Zhang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Yanchun Li
- Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130023, China
| | - Zhiyong Guo
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun, 130012, China.
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16
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Kong Z, Wang M, Shi X, Wang X, Zhang X, Chai L, Liu D, Shen Q. The functions of potential intermediates and fungal communities involved in the humus formation of different materials at the thermophilic phase. Bioresour Technol 2022; 354:127216. [PMID: 35472639 DOI: 10.1016/j.biortech.2022.127216] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
Humus is the final product of humus precursors (HPS) during the humification process, while the associated mechanisms of humus formation have not been clarified. Here, the HPS degradation intermediate and core fungal function for wheat straw and chicken manure compost (SCM), cow dung compost (CD), Chinese traditional medicine residue compost (CTM) and mushroom dreg and chicken manure compost (MCM) was investigated during the thermophilic phase. The results showed SCM and MCM were rich in proteins, lipids, cellulose, low-molecular-weight organic acids, while CD and CTM contained abundant carbohydrates, aliphatic compounds, easily biodegradable aromatic structures, and intermediates from the lignocellulose degradation. In particular, the HPS degrading intermediates including O-alkyl-C and aromatic C compounds were the critical factors, and Scedosporium, Hypsizygus and Remersonia were the core fungal genera for the humification. Furthermore, the potential fungal functional genes involved in carbohydrate and lignin degradation might be the key factors to drive the humification process.
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Affiliation(s)
- Zhijian Kong
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, People' Republic of China; Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China
| | - Mengmeng Wang
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of the People' Republic of China, Nanjing 210042, People' Republic of China
| | - Xiaoteng Shi
- Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China
| | - Xudong Wang
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, People' Republic of China; Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China
| | - Xiangkai Zhang
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, People' Republic of China; Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China
| | - Lifang Chai
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, People' Republic of China; Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China
| | - Dongyang Liu
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, People' Republic of China; Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China.
| | - Qirong Shen
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, People' Republic of China; Nanjing Agricultural University, Nanjing 210095, Jiangsu, People' Republic of China
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17
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Zhao H, Li S, Jiang Y, Wang D, Wang H, Dou X. Independent and combined effects of antibiotic stress and EM microbial agent on the nitrogen and humus transformation and bacterial community successions during the chicken manure composting. Bioresour Technol 2022; 354:127237. [PMID: 35489576 DOI: 10.1016/j.biortech.2022.127237] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 06/14/2023]
Abstract
This study aimed to investigate the independent and combined effects of antibiotic and EM microbial agent on the nitrogen and humus (HS) transformations as well as the bacterial community successions during the chicken manure and rice husk composting. EM microbial agent accelerated the oxytetracycline (OTC) degradation, but slowed down the norfloxacin (NOR) degradation. OTC inhibited the TN retention and promoted the HS accumulation, both NOR and EM microbial agent inhibited the TN retention and HS accumulation, while EM microbial agent showed an antagonistic effect on TN immobilization with antibiotics and reduced the impacts of antibiotics on HS. Obvious bacterial community successions occurred. Firmicutes were related to HS transformation, while Firmicutes, Actinobacteriota and Proteobacteria were associated with nitrogen conversion. NOR promoted the transformations of NH4+-N to NO3--N and FA to HA. The findings provided theoretical data for the recycle of antibiotic-contaminated manure and the efficient production of high-quality compost.
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Affiliation(s)
- Huaxuan Zhao
- Poultry Insititute, Chinese Academy of Agricultural Sciences, Yangzhou 225003, China
| | - Shangmin Li
- Poultry Insititute, Chinese Academy of Agricultural Sciences, Yangzhou 225003, China; College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yixiu Jiang
- Poultry Insititute, Chinese Academy of Agricultural Sciences, Yangzhou 225003, China
| | - Danpin Wang
- Poultry Insititute, Chinese Academy of Agricultural Sciences, Yangzhou 225003, China
| | - Hongzhi Wang
- Poultry Insititute, Chinese Academy of Agricultural Sciences, Yangzhou 225003, China
| | - Xinhong Dou
- Poultry Insititute, Chinese Academy of Agricultural Sciences, Yangzhou 225003, China
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18
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Svensson T, Redon PO, Thiry Y, Montelius M, Bastviken D. Chlorination of soil organic matter: The role of humus type and land use. Sci Total Environ 2022; 806:150478. [PMID: 34582876 DOI: 10.1016/j.scitotenv.2021.150478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
The levels of natural organic chlorine (Clorg) typically exceed levels of chloride in most soils and is therefore clearly of high importance for continental chlorine cycling. The high spatial variability raises questions on soil organic matter (SOM) chlorination rates among topsoils with different types of organic matter. We measured Clorg formation rates along depth profiles in six French temperate soils with similar Cl deposition using 36Cl tracer experiments. Three forest sites with different humus types and soils from grassland and arable land were studied. The highest specific chlorination rates (fraction of chlorine pool transformed to Clorg per time unit) among the forest soils were found in the humus layers. Comparing the forest sites, specific chlorination was highest in mull-type humus, characterized by high microbial activity and fast degradation of the organic matter. Considering non-humus soil layers, grassland and forest soils had similar specific chlorination rates in the uppermost layer (0-10 cm below humus layer). Below this depth the specific chlorination rate decreased slightly in forests, and drastically in the grassland soil. The agricultural soil exhibited the lowest specific chlorination rates, similar along the depth profile. Across all sites, specific chlorination rates were correlated with soil moisture and in combination with the patterns on organic matter types, the results suggest an extensive Cl cycling where humus types and soil moisture provided best conditions for microbial activity. Clorg accumulation and theoretical residence times were not clearly linked to chlorination rates. This indicates intensive Cl cycling between organic and inorganic forms in forest humus layers, regulated by humic matter reactivity and soil moisture, while long-term Clorg accumulation seems more linked with overall deep soil organic carbon stabilization. Thus, humus types and factors affecting soil carbon storage, including vegetation land use, could be used as indicators of potential Clorg formation and accumulation in soils.
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Affiliation(s)
- Teresia Svensson
- Department of Thematic Studies - Environmental Change, Linköping University, 581 83 Linköping, Sweden.
| | - Paul-Olivier Redon
- Andra, Research and Development Division, 1/7 rue Jean-Monnet, 92298 Chatenay-Malabry Cedex, France
| | - Yves Thiry
- Andra, Research and Development Division, 1/7 rue Jean-Monnet, 92298 Chatenay-Malabry Cedex, France
| | - Malin Montelius
- Swedish Geotechnical Institute (SGI), 581 93 Linköping, Sweden
| | - David Bastviken
- Department of Thematic Studies - Environmental Change, Linköping University, 581 83 Linköping, Sweden
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19
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Liu HT, Guo HN, Guo XX, Wu S. Probing changes in humus chemical characteristics in response to biochar addition and varying bulking agents during composting: A holistic multi-evidence-based approach. J Environ Manage 2021; 300:113736. [PMID: 34521000 DOI: 10.1016/j.jenvman.2021.113736] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
Despite the various benefits of humus, the changes in its chemical characteristics during composting in response to biochar addition and varying bulking agents remain to be further explored. In this study, three treatments were conducted, in which swine manure, bulking agent, and biochar were mixed at ratios of 4:1:0, 8:1:0, and 8:1:1. Fourier transform infrared spectroscopy (FTIR), carbon nuclear magnetic resonance spectroscopy (13C-NMR), three-dimensional excitation-emission matrix fluorescence spectroscopy (3D-EEM), and near-edge X-ray absorption fine structure (NEXAFS) were employed to characterize the chemical and structural properties of humus from multiple perspectives. The 3D-EEM spectra in this study showed a larger increase in humic acids (HAs) content (56%) and HAs to fulvic acids ratio (128%) during composting, indicating stronger humification in biochar-amended treatment. FTIR, 13C-NMR, and NEXAFS all confirmed the essential properties of HA as the core agronomic functional substance with rich aromatic and carboxyl groups, and that its aromaticity increased gradually during composting. In addition, 13C-NMR demonstrated that biochar addition and a relatively higher bulking agent ratio aided an increase in the carboxyl C proportion in HA after composting. In particular, NEXAFS revealed that biochar addition promoted the diversification of C, N, and O species in HA, with the emergence of quinone C and O-alkyl C as the main representatives. This work suggests that biochar addition and a relatively high bulking agent ratio could enhance humification and improve the agronomic function of humus.
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Affiliation(s)
- Hong-Tao Liu
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Engineering Laboratory for Yellow River Delta Modern Agriculture, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Hao-Nan Guo
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiao-Xia Guo
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Shubiao Wu
- Department of Agroecology, Aarhus University, Blichers Allé 20, 8830, Tjele, Denmark
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20
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Qiu C, Xu W, Wang Y, Yang J, Su X, Lin Z. Hydrothermal alkaline conversion of sewage sludge: optimization of process parameters and characterization of humic acid. Environ Sci Pollut Res Int 2021; 28:57695-57705. [PMID: 34091839 DOI: 10.1007/s11356-021-14711-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 05/31/2021] [Indexed: 06/12/2023]
Abstract
Sewage sludge (SS) dewatering is a key step in sludge disposal, which plays an important role in reducing sludge volume, facilitating transportation and subsequent treatment. In this paper, a facile hydrothermal-alkaline treatment for SS was proposed, which can be used for sludge dewatering and humic acid (HA) recycling at the same time. Response surface methodology (RSM) was used to determine the optimal conditions, and a mathematical model was established to accurately predict the changes of sludge water content and the extraction rate of HA. Under the optimal conditions of 170 °C/42 min/0.05 (for hydrothermal temperature, hydrothermal time, and mass ratio of KOH to wet sludge, respectively), the water content decreased to 46.7% and the extraction rate of HA (with a purity of 96.2%) was 89.1%. The improvement of the dewatering performance effectively facilitates the subsequent disposal of the sludge. The hydrothermal-alkaline method not only realizes the efficient dehydration of the sludge, but also obtains HA from the sludge extract. The obtained HA has potential economic value in the fields of agriculture, biological medicine, environment, and the like.
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Affiliation(s)
- Chen Qiu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
- China-Singapore International Joint Research Institute, Guangzhou, 510000, People's Republic of China
| | - Wenbing Xu
- Dongjiang Environmental Company Limited, Shenzhen, Guangdong, 518057, People's Republic of China
| | - Yanjie Wang
- Dongjiang Environmental Company Limited, Shenzhen, Guangdong, 518057, People's Republic of China
| | - Jiakuan Yang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Xintai Su
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China.
- China-Singapore International Joint Research Institute, Guangzhou, 510000, People's Republic of China.
| | - Zhang Lin
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
- China-Singapore International Joint Research Institute, Guangzhou, 510000, People's Republic of China
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21
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Makineci E. Nitrogen accumulation in forest floors with introduced Pinus pinea and Pinus pinaster in dune site. Environ Monit Assess 2021; 193:327. [PMID: 33950377 DOI: 10.1007/s10661-021-09100-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Introduced stone pine (Pinus pinea L.) and maritime pine (Pinus pinaster Aiton) stands were sampled 60 years after plantation in Istanbul-Durusu (Terkos), Turkey. Sampling was conducted at four different developmental stages (mean diameter of trees at 1.3-m height (DBH) in stands: SDF = < 8 cm, MDF = 8-20 cm, LDF = 20-36 cm, and UDF > 36 cm), with 15 replicated sample plots for each species and developmental stage, for a total of 120 sample plots. The forest floor was sampled in 5 replications in each sample plot. The forest floor samples were divided into two layers: L + F (litter + fermentation) and H (humus), and the oven dry mass and nitrogen (N) content were determined. As a result, the masses of the total forest floor and of both layers were significantly different among the development stages with an increasing trend in maritime pine stands despite no significant difference found in the mass of the humus layer in stone pine stands. However, total forest floor accumulation significantly increased with the development stage (28-60 t/ha in stone pine and 17-64 t/ha in maritime pine). In both species, the N concentrations in the forest floor layers differed significantly among the development stages, and the N concentrations tended to increase as the development stage increased in the L + F layer, whereas a fluctuating trend was observed in the H layer. Although the N content of the humus layer of stone pine did not show a significant difference among the development stages, the N content in the total forest floor was determined to be 0.1-0.5 t/ha in maritime pine and 0.2-0.5 t/ha in stone pine. The relationship between the mean stand DBH and the N stock of the total forest floor was determined to have a higher correlation in maritime pine (R2 = 0.8) than stone pine (R2 = 0.4). In conclusion, the nitrogen concentrations and nitrogen contents of the forest floor were remarkably different in stands introduced with different tree species, indicating the accumulation of forest floor nitrogen.
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Affiliation(s)
- Ender Makineci
- Soil Science and Ecology Department, Faculty of Forestry, Istanbul University-Cerrahpaşa, Bahçeköy Merkez, Orman Fakültesi No. 2, 34473, Sarıyer, Istanbul, Turkey.
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Wang H, Zhang J, Zhu J, Chang J, Wang N, Chen H. Synergistic/antagonistic effects and mechanisms of Cr(VI) adsorption and reduction by Fe(III)-HA coprecipitates. J Hazard Mater 2021; 409:124529. [PMID: 33218908 DOI: 10.1016/j.jhazmat.2020.124529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/29/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
Widespread Fe(III)-humic acid (HA) coprecipitates (FHCs) have substantial impacts on the adsorption and reduction of Cr(VI) in soils and sediments, but whether this process is equal to the sum of their individual components remains unknown. In this study, ferrihydrite (Fh)- and HA-like FHCs (C/Fe<3 and C/Fe>3, respectively) were synthesized by controlling the initial C/Fe ratios (0.5-18) to explore the potential synergistic/antagonistic effects during the adsorption and reduction of Cr(VI). According to the results, antagonistic effects on Cr(VI) adsorption (5%-80%) were observed on Fh- and HA-like FHCs, where the antagonistic intensity increased with increasing HA proportions, respectively caused by the more serious occupation of adsorption sites and the stronger electrostatic repulsion to Cr(VI). Notably, significant synergistic reduction effects (5%-650%) occurred on Fh-like FHCs were found to be achieved by the activation of low-molecular HA (0.1-0.3 kDa) with primary/secondary hydroxylic groups, which might be induced by the inductive effect of Fh on complexed HA molecules according to density-functional theory (DFT) calculation. While slight antagonistic reduction effects (2%-45%) by HA-like FHCs were attributed to the decreasing accessibility of Cr(VI) to reductive phenolic groups, which might be blocked within FHC particles or complexed with Fe(III) ions through cation bridges.
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Affiliation(s)
- Hui Wang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, PR China
| | - Jia Zhang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, PR China.
| | - Jinqi Zhu
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, PR China
| | - Jingjie Chang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, PR China
| | - Ning Wang
- Chinese Academy for Environmental Planning, Beijing 100020, PR China
| | - Honghan Chen
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, PR China
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23
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Izquierdo M, Young SD, Bailey EH, Crout NMJ, Lofts S, Chenery SR, Shaw G. Kinetics of uranium(VI) lability and solubility in aerobic soils. Chemosphere 2020; 258:127246. [PMID: 32535442 DOI: 10.1016/j.chemosphere.2020.127246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/23/2020] [Accepted: 05/27/2020] [Indexed: 06/11/2023]
Abstract
Uranium may pose a hazard to ecosystems and human health due to its chemotoxic and radiotoxic properties. The long half-life of many U isotopes and their ability to migrate raise concerns over disposal of radioactive wastes. This work examines the long-term U bioavailability in aerobic soils following direct deposition or transport to the surface and addresses two questions: (i) to what extent do soil properties control the kinetics of U speciation changes in soils and (ii) over what experimental timescales must U reaction kinetics be measured to reliably predict long-term of impact in the terrestrial environment? Soil microcosms spiked with soluble uranyl were incubated for 1.7 years. Changes in UVI fractionation were periodically monitored by soil extractions and isotopic dilution techniques, shedding light on the binding strength of uranyl onto the solid phase. Uranyl sorption was rapid and strongly buffered by soil Fe oxides, but UVI remained reversibly held and geochemically reactive. The pool of uranyl species able to replenish the soil solution through several equilibrium reactions is substantially larger than might be anticipated from typical chemical extractions and remarkably similar across different soils despite contrasting soil properties. Modelled kinetic parameters indicate that labile UVI declines very slowly, suggesting that the processes and transformations transferring uranyl to an intractable sink progress at a slow rate regardless of soil characteristics. This is of relevance in the context of radioecological assessments, given that soil solution is the key reservoir for plant uptake.
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Affiliation(s)
- M Izquierdo
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, United Kingdom; Institute of Environmental Assessment and Water Research, 18-26 Jordi Girona, Barcelona, 08034, Spain.
| | - S D Young
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, United Kingdom
| | - E H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, United Kingdom
| | - N M J Crout
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, United Kingdom
| | - S Lofts
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster, LA1 4AP, United Kingdom
| | - S R Chenery
- British Geological Survey, Environmental Science Centre, Keyworth, Nottingham, NG12 5GG, United Kingdom
| | - G Shaw
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, United Kingdom
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Makhinova AF, Makhinov AN. Role of humus substances in chemical soil pollution during deposit exploitation in Priokhotye and Priamurye. Environ Res 2020; 188:109766. [PMID: 32554274 DOI: 10.1016/j.envres.2020.109766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/23/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
Here we analyze how the mining enterprises of Priokhotye and Priamurye affect the state of soils. It is established that during 3-5 years of operation of the ZIF (gold mining factory) there is occurred in the soil an increase in total concentrations of Fe, Mn, Pb, Cu and Zn with respect to the background level. We show that sulfate-containing minerals of mining raw materials and waste play a role in the formation of wastewater composition and chemical contamination of soils. The background-forming elements (Fe and Mn) were found to determine the nature of the distribution of soluble forms of Cu, Pb, Zn and Co in the soil profile, while the content of aggressive fractions of humic acids intensifies their migration activity. The distribution of chemical elements in the soil profile is controlled by the content and quality of organic matter. The degree of activation of geochemical processes in situ in the soils against the background of a low temperature gradient does not prevent the migration of pollutants via the subsurface flow down the slope. The conditions of the migration of the elements and the processes of their concentration in the soils were analyzed. The migration activity of multi-charged cations (Fe3+, Mn7+) was shown to determine the behavior of low-charged cations (Cu(1-2)+, Zn2+, Pb2+). The levels of contamination of the soils characterized by the excess of concentrations of elements over their regional geochemical background were studied. The spatial heterogeneity of chemical element concentrations in soils is considered as a function of migration activity of elements. The mechanisms of chemical contamination of soils that present the risks of soil degradation in the absence of recultivation are described. The basic principles of the regime of natural resources management in the areas of mining activity for the territory of Priokhotye and Priamurye are formulated. We publish fragment of the map, original geochemical studies and a new data, focusing on the different aspects of this case study. We are publishing this for the first time.
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25
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Izquierdo M, Bailey EH, Crout NMJ, Sanders HK, Young SD, Shaw GG. Kinetics of 99Tc speciation in aerobic soils. J Hazard Mater 2020; 388:121762. [PMID: 31818664 DOI: 10.1016/j.jhazmat.2019.121762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/21/2019] [Accepted: 11/25/2019] [Indexed: 06/10/2023]
Abstract
Technetium-99 is a significant and long-lived component of spent nuclear fuel relevant to long-term assessments of radioactive waste disposal. Whilst 99Tc behaviour in poorly aerated environments is well known, the long-term bioavailability in aerobic soils following direct deposition or transport to the surface is less well understood. This work addresses two questions: (i) to what extent do soil properties control 99Tc kinetics in aerobic soils and (ii) over what experimental timescales must 99Tc kinetics be measured to make reliable long-term predictions of impact in the terrestrial environment? Soil microcosms spiked with 99TcO4- were incubated for 2.5 years and 99Tc transformations were periodically monitored by a sequential extraction, which enabled quantification of the reaction kinetics. Reduction in soluble 99Tc was slow and followed a double exponential kinetic model including a fast component enhanced by low pH, a slow component controlled by pH and organic matter, and a persistently soluble 99Tc fraction. Complexation with soil humus was key to the progressive immobilisation of 99Tc. Evidence for slow transfer to an unidentified 'sink' was found, with estimated decadal timeframes. Our data suggest that short-term experiments may not reliably predict long-term 99Tc solubility in soils with low to moderate organic matter contents.
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Affiliation(s)
- Maria Izquierdo
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom; Institute of Environmental Assessment and Water Research, IDAEA-CSIC, 18-26 Jordi Girona, Barcelona 08034, Spain.
| | - Elizabeth H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - Neil M J Crout
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - Heather K Sanders
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - Scott D Young
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - George G Shaw
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
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26
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Luo M, Yang S, Shen S, Li Y. Adsorption Characteristics of Oxytetracycline by Different Fractions of the Organic Matter from Humus Soil: Insight from Internal Structure and Composition. Int J Environ Res Public Health 2020; 17:E914. [PMID: 32024210 DOI: 10.3390/ijerph17030914] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 01/23/2020] [Accepted: 01/29/2020] [Indexed: 12/19/2022]
Abstract
For minimizing the transport of antibiotics to groundwater, the migration of antibiotics in soils should be investigated. Soil organic matter can affect the migration of antibiotics. To date, the influence of aromatics and aliphatic content of organic matter on the adsorption of antibiotics has been controversial. To better understand the reaction mechanism of soil organic matter with antibiotics, this study investigated the adsorption of oxytetracycline (OTC) by humus soils (HOS) and their fractions. HOS were sequentially fractionated into four organic fractions, including the removal of dissolved organic matter (HRDOM), removal of minerals (HRM), removal of free fat (HRLF), and nonhydrolyzable organic carbon (HNHC). Moreover, batch experiments revealed that adsorption capacity was ordered by HNHC > HOS > HRDOM > HRLF > HRM. SEM images and N2 adsorption/desorption isotherms indicate that adsorption capacity is independent of the external structure. However, adsorption capacity is related to the internal structure and composition. Combination analysis with elemental composition and infrared spectroscopy showed that the adsorption capacity of HRM, HRLF, and HNHC had a good positive correlation with aromaticity, but a negative correlation with polarity and hydrophilicity. Additionally, the rule of binding affinity between OTC and functional groups with different properties was summarized as aromatic > polarity > hydrophilic.
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Wang D, He D, Liu X, Xu Q, Yang Q, Li X, Liu Y, Wang Q, Ni BJ, Li H. The underlying mechanism of calcium peroxide pretreatment enhancing methane production from anaerobic digestion of waste activated sludge. Water Res 2019; 164:114934. [PMID: 31394464 DOI: 10.1016/j.watres.2019.114934] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/23/2019] [Accepted: 07/29/2019] [Indexed: 05/21/2023]
Abstract
Recent investigations verified that calcium peroxide (CaO2) could be used to pretreat waste activated sludge to promote methane yield from anaerobic digestion. However, the underlying mechanism of how CaO2 pretreatment promotes methane production is unclear. This work therefore aims to provide insights into such systems. Experimental results showed that with an increase of CaO2 dosage from 0 to 0.14 g/g VSS (volatile suspended solids) the methane yield increased linearly from 146.3 to 215.9 mL/g VSS. Further increases of CaO2 resulted in decreases in methane yield. CaO2 pretreatment promoted the disintegration of sludge and the degradation of sludge recalcitrant organics (especially humus and lignocellulose), thereby providing more substrates for subsequent methane production. Ultraviolet absorption spectroscopy indicated that CaO2 enhanced the cleavage of unsaturated conjugated bonds and reduced the aromaticity of humus and lignocellulose. Fourier transform infrared spectroscopy showed that CaO2 changed the structures and functional groups of humus and lignocellulose, making them transform to be biodegradable. GC/MS analyses exhibited that the degradation products of humus and lignocellulose included several types of small molecular organics such as ester-like, acid-like, and alcohol-like substances. Further investigation demonstrated that substantial methane could be produced from these degradation products. It was also found that the presence of recalcitrant organics was detrimental to anaerobes relevant to anaerobic digestion, and the degradation of such recalcitrant organics mitigated their inhibitions to the anaerobes. Model-based analysis suggested that CaO2 pretreatment increased the maximum methane yield and methane production rate, which were consistent with the analysis above.
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Affiliation(s)
- Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Dandan He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Hailong Li
- School of Energy Science and Engineering, Central South University, Changsha, 410083, PR China
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Wang S, Xu J, Zhang X, Wang Y, Fan J, Liu L, Wang N, Chen D. Structural characteristics of humic-like acid from microbial utilization of lignin involving different mineral types. Environ Sci Pollut Res Int 2019; 26:23923-23936. [PMID: 31222654 DOI: 10.1007/s11356-019-05664-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
This paper determines the impact of two clay minerals (kaolinite and montmorillonite) and three oxides (goethite, δ-MnO2, and bayerite) on the elemental composition and FTIR spectra of humic-like acid (HLA) extracted from microbial-mineral residue formed from the microbial utilization of lignin in liquid shake flask cultivation. Goethite, bayerite, and δ-MnO2 showed higher enrichment capabilities of C and O + S in the HLA than kaolinite and montmorillonite. Goethite showed the highest retention of organic C, followed by bayerite, but kaolinite exhibited the least exchangeability. Kaolinite and montmorillonite enhanced microbial consumption of N, resulting in the absence of N in HLA. A few aliphatic fractions were preferentially gathered on the surfaces of kaolinite and montmorillonite, making the H/C ratios of HLA from the clay mineral treatments higher than those of HLA from the oxide treatments. δ-MnO2 was considered the most effective catalyst for abiotic humification, and goethite and bayerite ranked second and third in this regard. This trend was proportional to their specific surface areas (SSAs). However, comparing the effects of different treatments on the promotion of HLA condensation by relying solely on the SSA of minerals was not sufficient, and other influencing mechanisms had to be considered as well. Additionally, Si-O-Al and Si-O of kaolinite participated in HLA formation, and Si-OH, Si-O, and Si-O-Al of montmorillonite also contributed to this biological process. Fe-O and phenolic -OH of goethite, Mn-O of δ-MnO2, and Al-O of bayerite were all involved in HLA formation through ligand exchange and cation bridges. Lignin was better protected from microbial decomposition by the kaolinite, bayerite, and δ-MnO2 treatments, which caused lignin-like humus (HS) formation. Under the treatments of δ-MnO2, goethite, and bayerite, HLA showed a greater degree of condensation compared to HLA precipitated by kaolinite and montmorillonite. Contributions from Si-O, and Si-O-Al of clay minerals, and Fe-O, Mn-O, and Al-O of oxides were the mechanisms by which minerals catalyzed the formation of HS from lignin.
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Affiliation(s)
- Shuai Wang
- College of Agriculture, Jilin Agricultural Science and Technology University, Jilin, 132101, China.
- Department of Biosystems Engineering and Soil Science, Institute of Agriculture, The University of Tennessee, Knoxville, TN, 37996, USA.
| | - Junping Xu
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100094, China
| | - Xi Zhang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yu Wang
- College of Agriculture, Jilin Agricultural Science and Technology University, Jilin, 132101, China
| | - Jiayan Fan
- College of Agriculture, Jilin Agricultural Science and Technology University, Jilin, 132101, China
| | - Lan Liu
- College of Agriculture, Jilin Agricultural Science and Technology University, Jilin, 132101, China
| | - Nan Wang
- College of Agriculture, Jilin Agricultural Science and Technology University, Jilin, 132101, China
| | - Dianyuan Chen
- College of Agriculture, Jilin Agricultural Science and Technology University, Jilin, 132101, China
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29
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Valenzuela EI, Avendaño KA, Balagurusamy N, Arriaga S, Nieto-Delgado C, Thalasso F, Cervantes FJ. Electron shuttling mediated by humic substances fuels anaerobic methane oxidation and carbon burial in wetland sediments. Sci Total Environ 2019; 650:2674-2684. [PMID: 30373050 DOI: 10.1016/j.scitotenv.2018.09.388] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/23/2018] [Accepted: 09/28/2018] [Indexed: 06/08/2023]
Abstract
Key pathways for the anaerobic oxidation of methane (AOM) have remained elusive, particularly in organic rich ecosystems. In this work, the occurrence of AOM driven by humus-catalyzed dissimilatory iron reduction was investigated in sediments from a coastal mangrove swamp. Anoxic sediment incubations supplied with both goethite (α-FeOOH) and leonardite (humic substances (HS)) displayed an average AOM rate of 10.7 ± 0.8 μmol CH4 cm-3 day-1, which was 7 and 3 times faster than that measured in incubations containing only goethite or HS, respectively. Additional incubations performed with 13C-methane displayed Pahokee Peat HS-mediated carbonate precipitation linked to 13CH4 oxidation and ferrihydrite reduction (~1.3 μmol carbonate cm-3 day-1). These results highlight the role of HS on mitigating greenhouse gases released from wetlands, not only by mediating the AOM process, but also by enhancing carbon sequestration as inert minerals (calcite, aragonite and siderite).
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Affiliation(s)
- Edgardo I Valenzuela
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, Mexico
| | - Karen A Avendaño
- Facultad de Ciencias Biológicas, Universidad Autónoma de Coahuila, Torreón, Coahuila, Mexico
| | - Nagamani Balagurusamy
- Facultad de Ciencias Biológicas, Universidad Autónoma de Coahuila, Torreón, Coahuila, Mexico
| | - Sonia Arriaga
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, Mexico
| | - Cesar Nieto-Delgado
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, Mexico
| | - Frederic Thalasso
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav-IPN), Av. IPN 2508, Mexico City, Mexico
| | - Francisco J Cervantes
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, San Luis Potosí, Mexico.
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30
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Wu J, Qi H, Huang X, Wei D, Zhao Y, Wei Z, Lu Q, Zhang R, Tong T. How does manganese dioxide affect humus formation during bio-composting of chicken manure and corn straw? Bioresour Technol 2018; 269:169-178. [PMID: 30172180 DOI: 10.1016/j.biortech.2018.08.079] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 08/17/2018] [Accepted: 08/19/2018] [Indexed: 06/08/2023]
Abstract
The aim of this study is to reveal the roles of MnO2 in Maillard reaction of biotic composting, and to identify its effectiveness in promoting humus formation. Corn straw (CS) and chicken manure (CM) have been chosen to be composted. During CS composting, addition of MnO2 rapidly reduced reducing sugars concentration (decreased by 84.0%) in 5 days and significantly improved humus production by 38.7% compared with treatment without MnO2. Whereas in CM composting, the promoting effect of MnO2 on humus formation was relatively weak by comparing with the treatment group of CS. Additionally, the presence of MnO2 has reshaped bacteria community, which might be the reason of MnO2 stimulated bacteria to utilize organic matter during CM composting. Therefore, the structural equation modeling has confirmed that MnO2 mainly performed as chemical catalyst to promote humus formation during CS composting. Besides catalyst, MnO2 also played as a bioactive activator in CM composting.
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Affiliation(s)
- Junqiu Wu
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Haishi Qi
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xinning Huang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Dan Wei
- Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Yue Zhao
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Zimin Wei
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Qian Lu
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Ruju Zhang
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Tianjiao Tong
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
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31
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Xiang L, Fang J, Cheng H. Toxicity of silver nanoparticles to green algae M. aeruginosa and alleviation by organic matter. Environ Monit Assess 2018; 190:667. [PMID: 30349996 DOI: 10.1007/s10661-018-7022-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 10/02/2018] [Indexed: 06/08/2023]
Abstract
Silver nanoparticles (AgNPs) have been increasingly used in a wide range of consumer products over the last decade. The release of AgNPs into aquatic ecosystems raises concerns about their safety and environmental toxicity, which have been the subject of recent studies. Herein, we assess the toxicity of AgNPs to the common algae Microcystis. aeruginosa. A toxicological response by M. aeruginosa was exhibited at an early stage of exposure to AgNPs, which were also toxic to its growth, photosynthetic, and membrane systems. The attachment of AgNPs to microalgae is likely the main mechanism by which it damages cell membranes. Dissolved Ag ions, originating from internalized AgNPs, seem to directly target the photosynthetic system. We also found that several humus-related indicators of water quality (HIX and β/α) were related to reduced AgNPs toxicity. Graphical abstract.
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Affiliation(s)
- Li Xiang
- School of Resource and Environment Engineering, Anhui University, Hefei, 230601, People's Republic of China
- Department of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, People's Republic of China
| | - Juan Fang
- Department of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, People's Republic of China
| | - Hua Cheng
- School of Resource and Environment Engineering, Anhui University, Hefei, 230601, People's Republic of China.
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Goldstein V, Boulanger N, Schwartz D, George JC, Ertlen D, Zilliox L, Schaeffer M, Jaulhac B. Factors responsible for Ixodes ricinus nymph abundance: Are soil features indicators of tick abundance in a French region where Lyme borreliosis is endemic? Ticks Tick Borne Dis 2018; 9:938-944. [PMID: 29606622 DOI: 10.1016/j.ttbdis.2018.03.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 03/11/2018] [Accepted: 03/12/2018] [Indexed: 10/17/2022]
Abstract
In Europe, the hard tick Ixodes ricinus (Acari: Ixodidae) is the main vector of Lyme borreliosis spirochetes (Borrelia burgdorferi sensu lato group). A field study was conducted to evaluate the abundance of Ixodes nymphs in the French region of Alsace, where Lyme borreliosis is endemic, and to determine whether environmental factors such as soil moisture and composition may be associated with nymph abundance. In the ten sites studied, ticks were collected by drag sampling from March to October in 2013 and 2014. Temperature, relative humidity, saturation deficit, soil pH, humus composition and type of vegetation were recorded at each site. The abundance of I. ricinus was highly variable from one site to another. Inter-annual variations were also observed, since the nymph abundance were higher in 2013 than in 2014. This study shows that humus type can be indicative of nymph abundance. Three types of humus were observed: (1) moder, (2) mull, and (3) mull-moder humus. One of them, moder humus, which is characterized by a thick layer of fragmented leaves, was found in multivariate analyses to be strongly associated with the nymph abundance. This study demonstrates that factors such as saturation deficit do not suffice to explain the differences in nymph abundance among sites. The composition of the soil and especially the type of humus should also be taken into consideration when assessing acarological risk.
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Affiliation(s)
- Valérie Goldstein
- EA 7290: Virulence bactérienne précoce: groupe Borréliose de Lyme, Facultés de pharmacie et de médecine, Université de Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France
| | - Nathalie Boulanger
- EA 7290: Virulence bactérienne précoce: groupe Borréliose de Lyme, Facultés de pharmacie et de médecine, Université de Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France; Centre National de Référence des Borrelia, Centre hospitalier universitaire, Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France.
| | - Dominique Schwartz
- UMR 7362, Laboratoire Image, Ville et Environnement, Faculté de géographie, Université de Strasbourg, 3 rue de l'Argonne, 67000, Strasbourg, France
| | - Jean-Claude George
- Centre National de Référence des Borrelia, Centre hospitalier universitaire, Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France
| | - Damien Ertlen
- UMR 7362, Laboratoire Image, Ville et Environnement, Faculté de géographie, Université de Strasbourg, 3 rue de l'Argonne, 67000, Strasbourg, France
| | - Laurence Zilliox
- Centre National de Référence des Borrelia, Centre hospitalier universitaire, Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France
| | - Mickaël Schaeffer
- Département d'Information Médicale, Centre hospitalier universitaire, 1 place de l'Hôpital, 67000, Strasbourg, France
| | - Benoît Jaulhac
- EA 7290: Virulence bactérienne précoce: groupe Borréliose de Lyme, Facultés de pharmacie et de médecine, Université de Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France; Centre National de Référence des Borrelia, Centre hospitalier universitaire, Strasbourg, 3 rue Koeberlé, 67097, Strasbourg, France
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Pandelova M, Henkelmann B, Bussian BM, Schramm KW. Results of the second national forest soil inventory in Germany - Interpretation of level and stock profiles for PCDD/F and PCB in terms of vegetation and humus type. Sci Total Environ 2018; 610-611:1-9. [PMID: 28802104 DOI: 10.1016/j.scitotenv.2017.07.246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 07/27/2017] [Accepted: 07/27/2017] [Indexed: 06/07/2023]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) were detected in 86 humic topsoil layers and in a subset of 11 randomly selected top mineral forest soils at the depths of 0-5cm and 5-10cm collected from different federal states of Germany. The distribution of these persistent organic pollutants (POPs) in humic topsoils with respect to vegetation cover (coniferous vs. deciduous vs. mixed), total organic carbon (TOC), altitude and latitude data was investigated. There is cross correlation between the contents and TOC while the correlation with latitude indicates higher abundances of POPs in central Germany where there is high population density accompanied with industrial activities. The calculated stocks suggest that humus type (mor, mull, or moder) in conjunction with forest type can explain the relative POPs abundances in different soil layers. Generally, humic topsoils show highest contents of POPs compare to the two mineral soils with a ratio of 100:10:1. However, the stock humic layers of coniferous stands contribute about 50% to the total stock, whereas at deciduous stands the stock is mainly located in the upper mineral soil layer (0-5cm). The soil-water distribution coefficients (Kd) were calculated to estimate the potential translocation in the different soil types. The Kd values vary among the PCBs and PCDD/Fs congeners and are most variable for humic topsoils. There is pronounced chemical abundance in the top mineral soils with increasing Kd and this points to non-water bound transport processes for superlipophilic compounds.
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Affiliation(s)
- Marchela Pandelova
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany.
| | - Bernhard Henkelmann
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany
| | - Bernd M Bussian
- Federal Environment Agency, Am Wörlitzer Platz, 06844 Dessau-Roßlau, Germany
| | - Karl-Werner Schramm
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Molecular EXposomics, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany; Department für Biowissenschaftliche Grundlagen, Technische Universität München, Weihenstephaner Steig 23, 85350 Freising, Germany
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Zhang J, Chen L, Yin H, Jin S, Liu F, Chen H. Mechanism study of humic acid functional groups for Cr(VI) retention: Two-dimensional FTIR and 13C CP/MAS NMR correlation spectroscopic analysis. Environ Pollut 2017; 225:86-92. [PMID: 28355575 DOI: 10.1016/j.envpol.2017.03.047] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Revised: 03/04/2017] [Accepted: 03/21/2017] [Indexed: 05/25/2023]
Abstract
Undissolved humic acid (HA) is known to substantially effect the migration and transformation of hexavalent chromium [Cr(VI)] in soils. The mechanisms of Cr(VI) retention in soils by undissolved HA have been reported; however, past studies are inconclusive about the types of HA functional groups that are involved in Cr(VI) retention and the retention mechanisms. Utilizing a two-dimensional correlation spectroscopy (2DCOS) analysis for FTIR and 13C CP/MAS NMR, this study investigated the variations of HA function groups and molecular structures after reactions with aqueous Cr(VI) under different pH conditions. Based on the changing sequence of functional groups interpreted from the 2DCOS results, a four-step mechanism for Cr(VI) retention was determined as follows: (1) electrostatic adsorption of Cr(VI) to HA surface, (2) complexation of adsorbed Cr(VI) by carboxyl and ester, (3) reduction of complexed Cr(VI) to Cr(III) by phenol and polysaccharide, and (4) complexation of reduced Cr(III) by carboxylic groups. These functional groups that are involved in Cr(VI) retention were determined to occur in aromatic domains.
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Affiliation(s)
- Jia Zhang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, China
| | - Linpeng Chen
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, China
| | - Huilin Yin
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, China
| | - Song Jin
- Department of Civil and Architectural Engineering, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071, USA
| | - Fei Liu
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, China.
| | - Honghan Chen
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences, Beijing 100083, China
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Forkapic S, Vasin J, Bikit I, Mrdja D, Bikit K, Milić S. Correlations between soil characteristics and radioactivity content of Vojvodina soil. J Environ Radioact 2017; 166:104-111. [PMID: 27079947 DOI: 10.1016/j.jenvrad.2016.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 03/31/2016] [Accepted: 04/03/2016] [Indexed: 06/05/2023]
Abstract
During the years 2001 and 2010, the content of 238U, 226Ra, 232Th, 40K and 137Cs in agricultural soil and soil geochemical characteristics were measured on 50 locations in Northern Province of Serbia - Vojvodina. The locations for sampling were selected so that they proportionately represent all geomorphologic units in the region. The content of clay and humus varied within wide limits depending on soil type and influence the activity concentrations of radionuclides. In this paper we analyzed correlations between radionuclides content and geochemical characteristics of the soil. Possible influence of fertilizers on 238U content in soil was discussed. The main conclusion is that measured maximal activity concentrations for 238U (87 Bq/kg), 226Ra (44.7 Bq/kg), 232Th (55.5 Bq/kg) and 137Cs (29 Bq/kg) at 30 cm depth could not endanger the safety of food production. The process of genesis of soil and cultivation mode plays a dominant role on the characteristics of the soil. The most significant correlation was found between the activity concentrations of 40K and clay content in agricultural soil.
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Affiliation(s)
- S Forkapic
- University of Novi Sad, Faculty of Sciences, Department of Physics, Laboratory for Radioactivity and Dose Measurements, 21000 Novi Sad, Serbia.
| | - J Vasin
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia
| | - I Bikit
- University of Novi Sad, Faculty of Sciences, Department of Physics, Laboratory for Radioactivity and Dose Measurements, 21000 Novi Sad, Serbia
| | - D Mrdja
- University of Novi Sad, Faculty of Sciences, Department of Physics, Laboratory for Radioactivity and Dose Measurements, 21000 Novi Sad, Serbia
| | - K Bikit
- University of Novi Sad, Faculty of Sciences, Department of Physics, Laboratory for Radioactivity and Dose Measurements, 21000 Novi Sad, Serbia
| | - S Milić
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia
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Cruz-Zavala AS, Pat-Espadas AM, Rangel-Mendez JR, Chazaro-Ruiz LF, Ascacio-Valdes JA, Aguilar CN, Cervantes FJ. Immobilization of metal-humic acid complexes in anaerobic granular sludge for their application as solid-phase redox mediators in the biotransformation of iopromide in UASB reactors. Bioresour Technol 2016; 207:39-45. [PMID: 26868154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 01/21/2016] [Accepted: 01/30/2016] [Indexed: 06/05/2023]
Abstract
Metal-humic acid complexes were synthesized and immobilized by a granulation process in anaerobic sludge for their application as solid-phase redox mediators (RM) in the biotransformation of iopromide. Characterization of Ca- and Fe-humic acid complexes revealed electron accepting capacities of 0.472 and 0.556milli-equivalentsg(-1), respectively. Once immobilized, metal-humic acid complexes significantly increased the biotransformation of iopromide in upflow anaerobic sludge blanket (UASB) reactors. Control UASB reactor (without humic material) achieved 31.6% of iopromide removal, while 80% was removed in UASB reactors supplied with each metal-humic acid complex. Further analyses indicated multiple transformation reactions taking place in iopromide including deiodination, N-dealkylation, decarboxylation and deacetylation. This is the first successful application of immobilized RM, which does not require a supporting material to maintain the solid-phase RM in long term operation of bioreactors. The proposed redox catalyst could be suitable for enhancing the redox conversion of different recalcitrant pollutants present in industrial effluents.
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Affiliation(s)
- Aracely S Cruz-Zavala
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216 San Luis Potosí, SLP, Mexico
| | - Aurora M Pat-Espadas
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216 San Luis Potosí, SLP, Mexico
| | - J Rene Rangel-Mendez
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216 San Luis Potosí, SLP, Mexico
| | - Luis F Chazaro-Ruiz
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216 San Luis Potosí, SLP, Mexico
| | - Juan A Ascacio-Valdes
- Facultad de Ciencias Químicas, Departamento de Investigación en Alimentos (DIA-UAdeC), Universidad Autónoma de Coahuila, Saltillo 25280, Coahuila, Mexico
| | - Cristobal N Aguilar
- Facultad de Ciencias Químicas, Departamento de Investigación en Alimentos (DIA-UAdeC), Universidad Autónoma de Coahuila, Saltillo 25280, Coahuila, Mexico
| | - Francisco J Cervantes
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, Col. Lomas 4ª. Sección, C. P. 78216 San Luis Potosí, SLP, Mexico.
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Hann P, Trska C, Wechselberger KF, Eitzinger J, Kromp B. Phyllopertha horticola (Coleoptera: Scarabaeidae) larvae in eastern Austrian mountainous grasslands and the associated damage risk related to soil, topography and management. Springerplus 2015; 4:139. [PMID: 25830083 PMCID: PMC4375213 DOI: 10.1186/s40064-015-0918-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 03/05/2015] [Indexed: 11/29/2022]
Abstract
The soil-dwelling larvae of several Scarabaeidae species (white grubs), like the cockchafer (Melolontha melolontha) and the garden chafer (Phyllopertha horticola), are serious pests in European cultivated grassland, reducing grass yield and destroying the turf by root-feeding. Nevertheless, the factors responsible for the development of large grub populations and the associated damage risk are poorly understood. The objectives of the study were to survey grub densities in grassland sites with different damage histories and find correlations with environmental and management variables. Data on grub densities were collected at 10 farms in the eastern Austrian Alps in September and October 2011. At each farm, one recently damaged site (high risk) and one site at which grub damage had never been observed by the farmers (undamaged site = low risk; each site: 500 m2) were sampled. All sites were dominated by P. horticola (99% of 1,422 collected individuals; maximum density 303 grubs/m2), which indicates that grub damage there is mainly caused by that species. Recently damaged sites tended to higher grub densities than undamaged sites. However, 3 out of 10 undamaged sites harbored high grub populations as well. Humus content together with the depth of the A-horizon significantly explained 38% of P. horticola grub density variance, with highest densities in deeper humus-rich soils. The risk of grub damage was positively connected to the humus content and negatively related to the cutting frequency. For the investigated mountainous grassland sites, these results suggest an important role of humus for the development of high grub densities and an effect of management intensity on grub damage.
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Affiliation(s)
- Patrick Hann
- Bio Forschung Austria, Esslinger Hauptstrasse 132-134, Vienna, 1220 Austria ; MELES GmbH, Mörikestraße 20, St. Pölten, 3100 Austria
| | - Claus Trska
- Bio Forschung Austria, Esslinger Hauptstrasse 132-134, Vienna, 1220 Austria
| | | | - Josef Eitzinger
- Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, 1180 Austria
| | - Bernhard Kromp
- Bio Forschung Austria, Esslinger Hauptstrasse 132-134, Vienna, 1220 Austria
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