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Environmental Restoration and Treatment in Karst Areas
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Environmental Restoration and Treatment in Karst Areas

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Environmental Science and Engineering".

Deadline for manuscript submissions: closed (30 March 2023) | Viewed by 6645

Special Issue Editors

Dr. Qiang Li

E-Mail Website
Guest Editor
Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China
Interests: karst rocky desertification; ecological restoration; microbial community
Prof. Dr. Honghu Zeng

E-Mail Website
Guest Editor
College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Interests: water pollution control; ecological risk assessment; migration and transformation mechanism; biodegradation
Dr. Fawang Zhang

E-Mail Website
Guest Editor
Center for Hydrogeology and Environmental Geology, China Geological Survey, Baoding 071051, China
Interests: karst hydrology; hydrologic processes; environmental impact

Special Issue Information

Dear Colleagues,

We are organizing a Special Issue, “Environmental Restoration and Treatment in Karst Areas”, in the International Journal of Environmental Research and Public Health, a peer-reviewed scientific journal that publishes articles and communications in the interdisciplinary area of environmental health sciences and public health. For detailed information on the journal, please visit the following link: https://www.mdpi.com/journal/ijerph.

Karst systems are recognized as the most fragile and vulnerable environments in the world due to their typical features, such as sinks, long dry valleys, sparse streams, and bare rock, and subsurface features, such as caverns, arterial solution openings leading to large springs, and deep water tables. Consequently, these areas have high eco-sensibility, low environmental capacity, weak anti-jamming capacity, and poor stability. Thus, practical issues, such as drought, flood, soil erosion and loss, rocky desertification, and water pollution resulting from these features, occasionally occur.

Interest in environmental restoration and treatment in karst areas to combat such challenges has recently experienced a sharp increase; this has resulted in the international exchange of numerous accounts of local areas and knowledge of special topical karst problems. Thus, efforts towards reviewing new advances in environmental restoration and treatment in karst areas and the determination of human impact on these areas are warranted. Moreover, the global exchange of information and findings in this field is essential.

This Special Issue is open to any subject area related to environmental restoration and treatment in karst areas. The listed keywords suggest just a few of the many possibilities that papers may consider

Dr. Qiang Li
Prof. Dr. Honghu Zeng
Dr. Fawang Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Environmental Research and Public Health is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • karst
  • karst rocky desertification
  • ecological restoration
  • karst hydrology
  • hydrologic processes
  • environmental impact
  • pollution control
  • evaluation system
  • ecological risk assessment
  • microbial community
  • environmental restoration and treatment

Published Papers (3 papers)

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Research

17 pages, 4121 KiB  
Article
Degradation Characteristics and Remediation Ability of Contaminated Soils by Using β-HCH Degrading Bacteria
by Qing Chen, Huijun Shi, Yanpeng Liang, Litang Qin, Honghu Zeng and Xiaohong Song
Int. J. Environ. Res. Public Health 2023, 20(4), 2767; https://doi.org/10.3390/ijerph20042767 - 4 Feb 2023
Cited by 4 | Viewed by 1401
Abstract
Three degradation strains that can utilize β-Hexachlorocyclohexanes (β-HCH) as the sole carbon source were isolated from the soil substrate of constructed wetland under long-term β-HCH stress, and they were named A1, J1, and M1. Strains A1 and M1 were [...] Read more.
Three degradation strains that can utilize β-Hexachlorocyclohexanes (β-HCH) as the sole carbon source were isolated from the soil substrate of constructed wetland under long-term β-HCH stress, and they were named A1, J1, and M1. Strains A1 and M1 were identified as Ochrobactrum sp. and strain J1 was identified as Microbacterium oxydans sp. by 16S rRNA gene sequence analysis. The optimum conditions for degradation with these three strains, A1, J1, and M1, were pH = 7, 30 °C, and 5% inoculum amount, and the degradation rates of 50 μg/L β-HCH under these conditions were 58.33%, 51.96%, and 50.28%, respectively. Degradation characteristics experiments showed that root exudates could increase the degradation effects of A1 and M1 on β-HCH by 6.95% and 5.82%, respectively. In addition, the degradation bacteria A1 and J1 mixed in a ratio of 1:1 had the highest degradation rate of β-HCH, which was 69.57%. An experiment on simulated soil remediation showed that the compound bacteria AJ had the best effect on promoting the degradation of β-HCH in soil within 98 d, and the degradation rate of β-HCH in soil without root exudates was 60.22%, whereas it reached 75.02% in the presence of root exudates. The addition of degradation bacteria or degradation bacteria-root exudates during soil remediation led to dramatic changes in the community structure of the soil microorganisms, as well as a significant increase in the proportion of aerobic and Gram-negative bacterial groups. This study can enrich the resources of β-HCH degrading strains and provided a theoretical basis for the on-site engineering treatment of β-HCH contamination. Full article
(This article belongs to the Special Issue Environmental Restoration and Treatment in Karst Areas)
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17 pages, 4118 KiB  
Article
Effects of Land Reclamation on Soil Bacterial Community and Potential Functions in Bauxite Mining Area
by Xuesong Li, Zhenjiang Jin, Liyuan Xiong, Lingchen Tong, Hongying Zhu, Xiaowen Zhang and Guangfa Qin
Int. J. Environ. Res. Public Health 2022, 19(24), 16921; https://doi.org/10.3390/ijerph192416921 - 16 Dec 2022
Cited by 4 | Viewed by 1825
Abstract
Studying the characteristics of microorganisms in mine reclamation sites can provide a scientific reference basis for mine land reclamation. Soils in the plough layer (0–20 cm) of the bauxite mine plots in Pingguo city, Guangxi Zhuang Autonomous Region, China, with different reclamation years [...] Read more.
Studying the characteristics of microorganisms in mine reclamation sites can provide a scientific reference basis for mine land reclamation. Soils in the plough layer (0–20 cm) of the bauxite mine plots in Pingguo city, Guangxi Zhuang Autonomous Region, China, with different reclamation years were used as the research objects. The community structure of soil bacteria was analyzed with high-throughput sequencing technology. The results show the following: (1) Reclamation significantly increased the contents of soil nutrients (p < 0.05). (2) The relative abundances of Proteobacteria were high (22.90~41.56%) in all plots, and reclamation significantly reduced the relative abundances of Firmicutes (3.42–10.77%) compared to that in the control plot (24.74%) (p < 0.05). The relative abundances of α-proteobacteria generally increased while the reclamation year increased. The relative abundances of α-proteobacteria and γ-proteobacteria showed significant positive correlations with soil carbon, nitrogen, and phosphorus nutrients (p < 0.01). The relative abundance of Acidobacteria Group 6 showed significant positive correlations with soil exchangeable Ca and Mg (p < 0.01). (3) Bacterial co-occurrence network showed more Copresence interactions in all plots (50.81–58.39%). The reclaimed plots had more nodes, higher modularity, and longer characteristic path length than the control plot, and the keystone taxa changed in different plots. (4) The chemoheterotrophy and aerobic chemoheterotrophy were the most abundant functional groups in all plots (35.66–48.26%), while reclamation reduced the relative abundance of fermentation groups (1.75–11.21%). The above findings indicated that reclamation improved soil nutrients, changed the bacterial community structure and potential functions, and accelerated the microbial stabilization of the reclaimed soil. Full article
(This article belongs to the Special Issue Environmental Restoration and Treatment in Karst Areas)
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9 pages, 1327 KiB  
Article
Time-Dependent Toxicity and Health Effects Mechanism of Cadmium to Three Green Algae
by Lingyun Mo, Yilin Yang, Danna Zhao, Litang Qin, Baikang Yuan and Nan Liang
Int. J. Environ. Res. Public Health 2022, 19(17), 10974; https://doi.org/10.3390/ijerph191710974 - 2 Sep 2022
Cited by 9 | Viewed by 2591
Abstract
As algae are extremely sensitive to heavy-metal ions and can be critical biological indicators in the heavy-metal toxicity analyses conducted by environmental health researchers, this paper explores the sensitivity to temporal toxicity of three species of green algae: Scenedesmus obliquus, Chlorella pyrenoidosa [...] Read more.
As algae are extremely sensitive to heavy-metal ions and can be critical biological indicators in the heavy-metal toxicity analyses conducted by environmental health researchers, this paper explores the sensitivity to temporal toxicity of three species of green algae: Scenedesmus obliquus, Chlorella pyrenoidosa, and Selenastrum capricornutum. The method of time-dependent microplate toxicity analysis was used to systematically investigate the changes in the toxicities of the three green-algae species induced by different concentrations of cadmium (Cd). The chlorophyll a content, antioxidant enzyme activity, and malondialdehyde (MDA) content in the algae were analyzed to explore the mechanism of Cd toxicity after 96 h of exposure. The results showed that the toxic effects of Cd on the three algae species were time-dependent. By comparing the toxic effect of Cd, indicated by pEC50 (the negative logarithm of EC50), on the algae species at four durations of exposure (24, 48, 72, and 96 h), this study found that the indicator organisms had different sensitivities to Cd. The order of sensitivity was C. pyrenoidosa > S. obliquus > S. capricornutum. Cd exposure had significant effects on the chlorophyll a and MDA content and on the enzyme activity of superoxide dismutase (SOD) and catalase (CAT) in the algae species. The chlorophyll a content in the cells of the algae decreased with increasing Cd concentration. The enzyme activity of CAT and content of MDA increased with increasing Cd concentration, which indicated that Cd had an oxidative stress effect on the three algae species. Full article
(This article belongs to the Special Issue Environmental Restoration and Treatment in Karst Areas)
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