scholarly journals Effect and influencing factors of modified biochar adsorption for the removal of nitrate nitrogen from water bodies

2021 ◽  
Vol 257 ◽  
pp. 03019
Author(s):  
Yang Hui ◽  
yan Yujie ◽  
zhang Jiaqi
Keyword(s):  
Influencing Factors ◽  
Nitrate Nitrogen ◽  
Research Direction ◽  
Research Progress ◽  
Polluted Water ◽  
Adsorption Effect ◽  
Remediation Technology ◽  
Modified Biochar ◽  
Research Prospect ◽  
Unique Surface

Nitrate-nitrogen pollution in water is a global problem. The research on the remediation technology of NO3--N polluted water has become a hot research direction in recent years. Biochar has a good adsorption effect on nitrate nitrogen because of its unique surface structure and rich surface properties. In this paper, the basic properties of biochar are introduced, and the research progress on the adsorption effect of modified biochar for nitrate nitrogen removal and the influencing factors are summarized. The problems and shortcomings in the current technology field were analyzed, and the research prospect and direction of using biochar to remove nitrate nitrogen were pointed out.

scholarly journals First-Principles Studies of Adsorptive Remediation of Water and Air Pollutants Using Two-Dimensional MXene Materials

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2281 ◽  
Author(s):  
Yujuan Zhang ◽  
Ningning Zhang ◽  
Changchun Ge
Keyword(s):  
First Principles ◽  
Environmental Remediation ◽  
Environmental Pollutants ◽  
Research Direction ◽  
Critical Issue ◽  
Research Progress ◽  
Transition Metal Carbide ◽  
Polluted Water ◽  
Two Dimensional ◽  
Highly Active

Water and air pollution is a critical issue across the whole world. Two-dimensional transition metal carbide/nitride (MXene) materials, due to the characteristics of large specific surface area, hydrophilic nature and abundant highly active surficial sites, are able to adsorb a variety of environmental pollutants, and thus can be used for environmental remediation. First-principles method is a powerful tool to investigate and predict the properties of low-dimensional materials, which can save a large amount of experimental costs and accelerate the research progress. In this review, we summarize the recent research progresses of the MXene materials in the adsorptive remediation of environmental pollutants in polluted water and air using first-principles simulations, and try to predict the research direction of MXenes in the adsorptive environmental applications from first-principles view.

scholarly journals Advances in the role of miRNAs in the occurrence and development of osteosarcoma

Open Medicine ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 1003-1011
Author(s):  
Guanyu Zhang ◽  
Yiran Li ◽  
Jiasheng Xu ◽  
Zhenfang Xiong
Keyword(s):  
Target Gene ◽  
Early Stage ◽  
Research Direction ◽  
Research Progress ◽  
Skeletal System ◽  
Translation Process ◽  
Non Coding Rnas ◽  
New Research ◽  
Post Transcriptional Regulation

AbstractOsteosarcoma (OS) is the most common primary malignant tumor of the skeletal system in the clinic. It mainly occurs in adolescent patients and the pathogenesis of the disease is very complicated. The distant metastasis may occur in the early stage, and the prognosis is poor. MicroRNAs (miRNAs) are non-coding RNAs of about 18–25 nt in length that are involved in post-transcriptional regulation of genes. miRNAs can regulate target gene expression by promoting the degradation of target mRNAs or inhibiting the translation process, thereby the proliferation of OS cells can be inhibited and the apoptosis can be promoted; in this way, miRNAs can affect the metabolism of OS cells and can also participate in the occurrence, invasion, metastasis, and recurrence of OS. Some miRNAs have already been found to be closely related to the prognosis of patients with OS. Unlike other reviews, this review summarizes the miRNA molecules closely related to the development, diagnosis, prognosis, and treatment of OS in recent years. The expression and influence of miRNA molecule on OS were discussed in detail, and the related research progress was summarized to provide a new research direction for early diagnosis and treatment of OS.

scholarly journals Comparative Changes of Influence Factors of Rural Residential Area Based on Spatial Econometric Regression Model: A Case Study of Lishan Township, Hubei Province, China

2018 ◽  
Vol 10 (10) ◽  
pp. 3403 ◽  
Author(s):  
Xuesong Zhang ◽  
Ju He ◽  
Zhen Deng ◽  
Jiyue Ma ◽  
Guangping Chen ◽  
...  
Keyword(s):  
Regression Model ◽  
Influencing Factors ◽  
Spatial Regression ◽  
Influence Factors ◽  
Water System ◽  
Decisive Role ◽  
Research Direction ◽  
Hubei Province ◽  
Residential Areas ◽  
Spatial Econometric

The influencing factors of rural residential areas have always been a key research direction in addressing rural problems in China. By introducing a spatial regression model combined with Kernel Density Estimation and Buffer Analysis, this study made a comparative study on the quantification of the influencing factors of rural residential areas in 2009, 2012, and 2015 in Lishan Township, Hubei Province, China. The results showed that the elevation and slope of Lishan Township have always played a decisive role in the distribution of rural residential areas, that the influence of the water system is abnormal, and that the influence of roads and townships has been strengthened based on the spatial statistical analysis. Then, based on spatial econometric regression analysis, the coefficients of “Topographic indices” (CTI) were 0.666, 0.719, and 0.439 in 2009, 2012, and 2015, respectively. The coefficients of Road (CR) were 0.170, 0.112, and 0.108, respectively. The coefficients of Town (CT) were 0.120, 0.127, and 0.166, respectively. The coefficients of Water system (CWS) were 0.166, 0.124, and 0.173, respectively. With the change of time, the influence of road decreased and the influence of town increased gradually. Furthermore, the influence of the water system and topography showed volatility.

scholarly journals Adsorption of As(V) by the Novel and Efficient Adsorbent Cerium-Manganese Modified Biochar

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2720
Author(s):  
Ting Liang ◽  
Lianfang Li ◽  
Changxiong Zhu ◽  
Xue Liu ◽  
Hongna Li ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Photoelectron Spectroscopy ◽  
Water Environment ◽  
Polluted Water ◽  
X Ray ◽  
Modified Biochar ◽  
Wide Ph Range ◽  
Infrared Spectrometer ◽  
Pseudo Second Order ◽  
Ph Range

Arsenic has become a global concern in water environment, and it is essential to develop efficient remediation methods. In this study, a novel adsorbent by loading cerium and manganese oxide onto wheat straw-modified biochar (MBC) was manufactured successfully aiming to remove arsenic from polluted water. Through scanning electron microscopy and energy-dispersive spectroscopy (SEM-EDS), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FT-IR), and other techniques, it was found the loading of cerium and manganese oxide on MBC played a significant role in As(V) adsorption. The results of the batch test showed that the adsorption of MBC followed the pseudo-second order kinetics and Langmuir equation. The adsorption capacity of MBC was 108.88 mg As(V)/g at pH = 5.0 (C0 = 100 mg/L, dosage = 0.5 g/L, T = 298 K) with considerable improvement compared to the original biochar. Moreover, MBC exhibited excellent performance over a wide pH range (2.0~11.0). Thermodynamics of the sorption reaction showed that the entropy (ΔS), changes of enthalpy (ΔH) and Gibbs free energy (ΔG), respectively, were 85.88 J/(moL·K), 22.54 kJ/mol and −1.33 to −5.20 kJ/mol at T = 278~323 K. During the adsorption, the formation of multiple complexes under the influence of its abundant surface M-OH (M represents the Ce/Mn) groups involving multiple mechanisms that included electrostatic interaction forces, surface adsorption, redox reaction, and surface complexation. This study indicated that MBC is a promising adsorbent to remove As(V) from polluted water and has great potential in remediating of arsenic contaminated environment.

scholarly journals Conceptualization and Research Progress on Web-Based Product Co-Design

Informatics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 30
Author(s):  
Xin Kang ◽  
Jian Kang ◽  
Wenyin Chen
Keyword(s):  
Design Research ◽  
Web Of Science ◽  
Research Direction ◽  
Research Trends ◽  
Research Progress ◽  
Future Research ◽  
Web Based ◽  
Development Status ◽  
Key Points ◽  
Core Concepts

Web-based stakeholders’ participation in product co-design is an emerging business model for companies. However, research on user’s online involvement in product co-design is limited. In this paper, we investigated the three major interdisciplinary academic databases Web of Science, Scopus, and ScienceDirect (data collected in May 2020), with the aim of explaining the meaning, core concepts, historical roots, and research trends of co-design. A total of 39 of the deemed relevant studies were emphatically analyzed, systematically discusses the concept implication and development status of co-design, and the key points of web-based product co-design research, as well as the future research direction.

Adsorption of Malachite Green on Fe-modified biochar: influencing factors and process optimization

2017 ◽  
Vol 74 ◽  
pp. 383-394 ◽  
Author(s):  
Esra Kulaksiz ◽  
Belgin Gözmen ◽  
Berkant Kayan ◽  
Dimitrios Kalderis
Keyword(s):  
Influencing Factors ◽  
Malachite Green ◽  
Process Optimization ◽  
Modified Biochar
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