Adsorption of 17β-estradiol by a novel attapulgite/biochar nanocomposite : Characteristics and influencing factors

Yin, Zhaoyi; Liu, Yunguo; Tan, Xiaofei; Jiang, Luhua; Zeng, Guangming; Liu, Shaobo; Tian, Si‐rong; Liu, Sijia; Liu, Geoffrey; Li, Meifang

doi:10.1016/j.psep.2018.10.022

Cited by 58 publications

(25 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To determine the surface properties of the original biochar and attapulgite/biochar2, curve-fitting procedures on the O 1s and C 1s peaks of the samples were conducted. The XPS O 1s spectra of the original biochar ( Figure 3A spectra of the original biochar ( Figure 3C) was deconvoluted into 3 peaks at 284.8, 286.0, and 288.3 eV, which were assigned to C=C, C-O, and O-C=O, respectively (Li L et al 2019). Peaks at 284.6, 285.1, and 286.2 eV appeared in the C 1s spectra of attapulgite/biochar2 and were assigned to C=C, C-C, and C-O, respectively (Li L et al 2019; Figure 3D).…”

Section: Characterization Of Biochar/attapulgite Compositesmentioning

confidence: 99%

“…The XPS O 1s spectra of the original biochar ( Figure 3A spectra of the original biochar ( Figure 3C) was deconvoluted into 3 peaks at 284.8, 286.0, and 288.3 eV, which were assigned to C=C, C-O, and O-C=O, respectively (Li L et al 2019). Peaks at 284.6, 285.1, and 286.2 eV appeared in the C 1s spectra of attapulgite/biochar2 and were assigned to C=C, C-C, and C-O, respectively (Li L et al 2019; Figure 3D). Thus the biochar/attapulgite composite had more oxygencontaining functional groups than the original biochar, which might be beneficial to the adsorption of heavy metals (Shi et al 2018;Xue et al 2018).…”

Section: Characterization Of Biochar/attapulgite Compositesmentioning

confidence: 99%

See 1 more Smart Citation

Functionalized Biochar/Clay Composites for Reducing the Bioavailable Fraction of Arsenic and Cadmium in River Sediment

Wang

Tan

et al. 2019

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

Biochar has frequently been used for the treatment of heavy metal pollution in water and soil; its effect on contaminated sediments requires further research. To improve the ability of biochar to immobilize heavy metals in sediment, we prepared a functionalized biochar/attapulgite composite by pyrolysis of the clay attapulgite and zinc chloride–pretreated rice straw biomass. Compared with the original biochar, the biochar/attapulgite composite had a large increase in specific surface area, pore volume, oxygen‐containing functional groups, and cation exchange capacity. Biochar effectively improved the dispersibility of attapulgite as a matrix. The results showed that the biochar/attapulgite composite effectively reduced the bioavailable fraction of arsenic (As) and cadmium (Cd) in river sediment, which was a great improvement compared with the raw biochar. After the sediment was treated with different biochar/attapulgite composites, the concentrations of As and Cd in the overlying water and the porewater, and the content of acid‐extractable and toxicity characteristic leaching procedure (TCLP)‐extractable As and Cd in the solid phase of the sediment decreased significantly. Both zinc chloride activation and attapulgite improved As and Cd immobilization in sediment when we used the biochar/attapulgite composite. The results suggest that biochar/attapulgite composite can be used as an efficient in situ sorbent amendment to improve the heavy metal immobilization ability of the sediment. Environ Toxicol Chem 2019;38:2337–2347. © 2019 SETAC.

show abstract

Section: Characterization Of Biochar/attapulgite Compositesmentioning

confidence: 99%

Section: Characterization Of Biochar/attapulgite Compositesmentioning

confidence: 99%

Functionalized Biochar/Clay Composites for Reducing the Bioavailable Fraction of Arsenic and Cadmium in River Sediment

Wang

Tan

et al. 2019

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…As presented in Figure 4 a, the E2 adsorption process could be divided into two stages, namely the fast adsorption stage and the slow adsorption stage [ 34 ]. E2 adsorption process was fast in the initial stage of 0~4 h and reached the equilibrium after 15 h. The rapid adsorption of E2 might be because of the electrostatic attraction between the negative charged E2 and the positive charged graphene-like magnetic biochar [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

“…The adsorption capacity of BC and 1:1/900 °C on E2 decreased slightly from the Figure 8 . Liu et al [ 35 ] have researched that graphene-like magnetic lotus biochar had negligible effects on E2 adsorption with the increasing HA concentration, which suggested that HA might not directly compete for effective active sites on the surface of biochar and cause pore blockage, or HA might happen adsorption by the strong π-π interaction [ 38 , 47 ]. Therefore, when graphene-like sawdust biochar is used in wastewater treatment, the NOMs will not affect its adsorption performance.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the XPS spectrum of 1:1/900 °C illustrated that its surface produced more O=C-O that was conducive to the adsorption of E2, which implied the involvement of oxygen-containing functional groups in the adsorption process. Some research has revealed that the contained oxygen functional groups could be improve the adsorption ability to E2 [ 18 , 38 ]. On the other hand, the graphene-like magnetic surface showed π-electron acceptor and E2 was a π-electron-rich contaminant due to the presence of aromatic rings [ 49 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Zhou

Liu

et al. 2020

IJERPH

Self Cite

View full text Add to dashboard Cite

The occurrence of environmental endocrine disrupting chemicals (EDCs) in aquatic environments has caused extensive concern. Graphene-like magnetic sawdust biochar was synthesized using potassium ferrate (K2FeO4) to make activated sawdust biochar and applied for the removal of 17-estradiol (E2). The characterization showed that the surface morphology of five graphene-like magnetic sawdust biochars prepared with different preparation conditions were quite different. The specific surface area and pore structure increased with the increment of K2FeO4 addition. The results have shown that graphene-like magnetic sawdust biochar (1:1/900 °C) had the best removal on E2. The experimental results indicated that pseudo-first-order kinetic model and the Langmuir model could describe the adsorption process well, in which the equilibrium adsorption capacity (qe,1) of 1:1/900 °C were 59.18 mg·g−1 obtained from pseudo-first-order kinetic model and the maximum adsorption capacity (qmax) of 1:1/900 °C were 133.45 mg·g−1 obtained from Langmuir model at 298K. At the same time, lower temperatures, the presence of humic acid (HA), and the presence of NaCl could be regulated to change the adsorption reaction in order to remove E2. Adsorption capacity was decreased with the increase of solution pH because pH value not only changed the surface charge of graphene-like magnetic sawdust biochar, but also affected the E2 in the water. The possible adsorption mechanism for E2 adsorption on graphene-like magnetic sawdust biochar was multifaceted, involving chemical adsorption and physical absorption, such as H-bonding, π-π interactions, micropore filling effects, and electrostatic interaction. To sum up, graphene-like magnetic sawdust biochar was found to be a promising absorbent for E2 removal from water.

show abstract

Bio/hydrochar Sorbents for Environmental Remediation

Zhang

Wang

Cai

et al. 2020

Energy & Environ Materials

View full text Add to dashboard Cite

An increasing global population and current societal reliance on fossil fuel resources has precipitated an ongoing crisis at the energy-materials-environment nexus. Sustainable resources are required to meet the demands of developed and emerging economies while mitigating climate change and protecting the biosphere; this has promoted the "zero-waste economy" and "trash-to-treasure strategy" concepts. [1] Achieving such ambitious goals necessitates a transition from fossil resources to renewables such as nuclear, solar, wind, and wave power, and biomass. Lignocellulosic biomass, such as agricultural and forestry residues, crops, and wood, is the most abundant (inedible to humans) biomass resource and a potential low-carbon feedstock to partially replace fossil carbon. It comprises cellulose and hemicellulose carbohydrate polymers embedded in a lignin matrix. [2] Lignin is a three-dimensional network of polyaromatic alcohols, whose upgrading can offer routes to renewable valueadded chemicals. [3] Hemicellulose comprises pentose (predominantly xylose) and hexose units connected by glycosidic bonds. Cellulose is a water insoluble, linear polysaccharide formed from glucose units linked via b-1,4-glycosidic bonds. [4] As an important renewable feedstock, biomass, and its conversion to materials, chemicals, and fuels is intensively researched. [5] Biomass conversion may occur through non-catalytic (thermo)chemical routes, e.g., pyrolysis and hydrothermal processing, and/or catalytic (bio)chemical routes, e.g., homogeneous, heterogeneous, and enzymatic catalyzed processes [3,6] (Figure 1). Bio/hydrochars are an important class of solid materials obtainable from biomass due to their applications as adsorbents and catalysts, and as precursors to activated carbons and other functional materials. [7] Bio/hydrochars and activated carbons are all pyrogenic materials, i.e., produced by thermochemical conversion and containing some organic carbon. Activated carbons may derive from any carbon source (fossil, waste, or renewable) and irrespective of sustainability concerns, whereas biochars are (now) viewed as pyrogenic materials derived from sustainably sourced biomass and not used as a fuel. [8] Activated carbons are amorphous and non-graphitic, with high surface areas and (usually) microporosity and a small proportion of hydrogen or oxygen, whereas biochars, and particularly hydrochars, often possess a higher oxygen content. A few studies refer to biochars as pyrochars (being derived by pyrolysis of biomass) and/or conflate the terms pyrochar and hydrochar under the banner of biochars. [9] In this review, we follow widely adopted literature conventions for char definitions [7c,10] : biochar is a carbon-rich, porous solid produced by biomass pyrolysis under restricted oxygen and moderate temperatures (350-700°C), whereas

show abstract

Adsorption of 17β-estradiol by a novel attapulgite/biochar nanocomposite : Characteristics and influencing factors

Cited by 58 publications

References 50 publications

Functionalized Biochar/Clay Composites for Reducing the Bioavailable Fraction of Arsenic and Cadmium in River Sediment

Functionalized Biochar/Clay Composites for Reducing the Bioavailable Fraction of Arsenic and Cadmium in River Sediment

Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism

Bio/hydrochar Sorbents for Environmental Remediation

Contact Info

Product

Resources

About