Author
Weihua Xu
Bio: Weihua Xu is an academic researcher from Hunan University. The author has contributed to research in topics: Adsorption & Biochar. The author has an hindex of 20, co-authored 46 publications receiving 1765 citations.
Papers
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TL;DR: The promotion of the tartaric acid modified rice straw and the slight inhibition of the esterified rice straw on Cr(VI) removal indicated that carboxyl groups present on the biomass played an important role in chromium remediation even though were not fully responsible for it.
249 citations
TL;DR: Equilibrium studies show that the data of Cu(II) adsorption follow the Langmuir model, and SICCM was highly efficient for the fast adsorbent of Cu (II) within the first 10 min, and adsor adaptation equilibrium could be achieved in 1h.
217 citations
TL;DR: In this paper, chitosan modification of magnetic biochar (CMB) was successfully prepared for effective removal of Cr(VI) in Eichhornia crassipes.
Abstract: In this research, chitosan modification of magnetic biochar (CMB) was successfully prepared for effective removal of Cr(VI). Moreover, this study highlighted that the conversion of Eichhornia crassipes into biochar was a promising method for improved management of this highly problematic invasive species. The sorption kinetics, isotherms, thermodynamics, the effects of pH, and background electrolyte on the sorption process were investigated. The results indicated that CMB adsorbed more Cr(VI) (120 mg g−1) than that of pristine biochar (30 mg g−1). The sorption data could be well illustrated by pseudo-second-order and Langmuir models. Furthermore, thermodynamic parameters revealed that the sorption reaction was an endothermic and spontaneous process. The adsorption of Cr(VI) was influenced by solution pH and the maximum sorption capacity was achieved at pH 2. The background electrolyte PO43− and SO42− restricted the Cr(VI) sorption. These results are significant for exploring and optimizing the removal of metal ions by the CMB composite.
173 citations
TL;DR: In this paper, five chromate-reducing strains were isolated from the chromium landfill and two of them were identified as Bacillus sp. The strain of XW-4 was selected to study the resistance to Cr(VI) and its ability to reduce Cr (VI).
157 citations
TL;DR: The experimental results suggest that the adsorption efficiency of DOX is dominated by the strong complexation, electrostatic interactions between DOX molecules and the Cu-BC samples, which hold the significant potential for enhancing the effectiveness to remove DOX from water.
146 citations
Cited by
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TL;DR: The biosorbents widely used for heavy metal removal were reviewed, mainly focusing on their cellular structure, biosorption performance, their pretreatment, modification, regeneration/reuse, modeling of biosor adaptation (isotherm and kinetic models), the development of novel biosorbent, their evaluation, potential application and future.
2,281 citations
TL;DR: This review outlined the latest applications of iron oxide nanomaterials in wastewater treatment, and gaps which limited their large-scale field applications, as well as the outlook for potential applications and further challenges.
1,632 citations
TL;DR: The present review highlights the necessity for the examination of biosorbents within real situations, as competition between solutes and water quality may affect the biosorption performance.
1,584 citations
TL;DR: Distinctive adsorption equilibria and kinetic models are of extensive use in explaining the biosorption of heavy metals, denoting the need to highlight and summarize their essential issues, which is the main purpose of this paper.
1,471 citations
TL;DR: This review summarizes the characteristics of biochar (e.g., surface area, porosity, pH, surface charge, functional groups, and mineral components) and main mechanisms governing sorption of As, Cr, Cd, Pb, and Hg by biochar and includes competitive sorption mechanisms of co-existing metals.
1,091 citations