Pesticides in aquatic environments and their removal by adsorption methods.

Rapid removal of triazine pesticides by P doped biochar and the adsorption mechanism

Sustainable materials in the removal of pesticides from contaminated water: Perspective on macro to nanoscale cellulose

Mesoporous activated carbon from starch for superior rapid pesticides removal.

Increased industrial and agricultural activity has affected the availability of phosphorus (P) in nature and has caused a significant imbalance in the P cycle with long-term consequences on ecosystem health and sustainability. While P is an essential element for food production as well as plant and animal nutrition, it is also a limited nonrenewable resource whose availability is expected to decrease in the next century. Widespread application of P-based fertilizers and their excessive accumulation in water bodies leads to eutrophication which is associated with overgrowth of harmful algal blooms and degradation of water quality. This paper provides an overview of contemporary challenges and methodologies for improving P use efficiency and sustainability in the environment. Technologies and processes for the removal of P-containing compounds from water through the use of functional nanomaterial sorbents with tailored surface properties for capture, removal, and recycling are described. Various classes of ...

Nanoporous Sorbents for the Removal and Recovery of Phosphorus from Eutrophic Waters: Sustainability Challenges and Solutions

The development of efficient adsorbents for the removal of organophosphorus pesticides from water is a major challenge. In this work, we prepared an activated carbon derived from sieve-like cellulose/graphene oxide composites (ACCE/G) for the removal of several organophosphorus pesticides. We employed corn straw to produce a sieve-like cellulose–graphene oxide composite (CCE/G); then, by treating CCE/G with potassium hydroxide at high temperatures, the efficient adsorbent ACCE/G was prepared. The adsorption capacity of ACCE/G is higher than those of other sorbents, including a multi-wall carbon nanotube, graphitised carbon black, activated carbon, C18, and primary secondary amine adsorbent. The ACCE/G structure has been fully characterised via scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction and Brunauer–Emmett–Teller analysis. The maximum adsorption capacity of ACCE/G is 152.5 mg g−1 for chlorpyrifos. The mechanism, the thermodynamic properties, and the kinetics of the adsorption process have been investigated as well. Our findings demonstrate that the adsorption mechanism depends on the electron-donating abilities of the S and P atoms. Moreover, the Langmuir model gives the best fit for the isotherm data, and the adsorption efficiency of the ACCE/G is still over 80% after eight times of recycling, making ACCE/G a valuable candidate for the removal of OPPs.

/pdf/a-carbonised-sieve-like-corn-straw-cellulose-graphene-oxide-5iwxl5xjpe.pdf

A carbonised sieve-like corn straw cellulose–graphene oxide composite for organophosphorus pesticide removal

A MOF-on-MOF composite encapsulating sensitized Tb(III) as a built-in self-calibrating fluorescent platform for selective sensing of F ions.

Graphene-based membranes have unique nanochannels and can offer advantageous properties for the water desalination process. Although tremendous efforts have been devoted to heightening membrane performance and broadening their application, there is still lack of a systematic literature review on the development and future directions of graphene-based membranes for desalination. In this mini-review, literature published between 2011 and 2022 were analyzed by using the bibliometric method. We found that the major contributors to these publications and the highest citations were from China and the USA. Nearly 80% of author keywords in this analysis were used less than twice, showing the broad interest and great dispersion in this field. The recent advances, remaining gaps, and strategies for future research, were discussed. The development of new multifunctional nanocomposite materials, heat-driven/solar-driven seawater desalination, and large-scale industrial applications, will be important research directions in the future. This literature analysis summarized the recent development of the graphene-based membranes for desalination application, and will be useful for researchers in gaining new insights into this field.

/pdf/graphene-based-membranes-for-water-desalination-a-literature-rbc41fmn.pdf

Graphene-Based Membranes for Water Desalination: A Literature Review and Content Analysis

Metal-organic frameworks (MOFs) have the advantages of tunable pore sizes and porosity and have demonstrated unique advantages for various applications. This study synthesized composite MOF nanomaterials by modifying MOF801 or AlOOH with UIO66. The composite nanomaterials, UIO66/MOF801 and UIO66/AlOOH showed increased Zeta potential than their pristine form, AlOOH, UIO66 and MOF801. For the first time, the composite MOFs were used to fabricate filter paper-based evaporation-driven power generators for spontaneous electricity generation. The MOFs-KBF membrane was constructed by coating filter paper (10 × 50 mm) with composite MOFs and conductive Ketjen Black. The UIO66/MOF801 decorated device achieved a maximum open circuit voltage of 0.329 ± 0.005 V and maximum output power of 2.253 μW. The influence of salt concentration (0.1–0.5 M) on power generation was also analyzed and discussed. Finally, as a proof-of-concept application, the device was employed as a salinity sensor to realize remote monitoring of salinity. This work demonstrated the potential of flexible MOF composites for spontaneous power generation from water evaporation and provides a potential way to enhance the performance of evaporation-driven power generators.

/pdf/mofs-ketjen-black-coated-filter-paper-for-spontaneous-19xc5ajv.pdf

MOFs/Ketjen Black-Coated Filter Paper for Spontaneous Electricity Generation from Water Evaporation

Spontaneous and sustainable multifunctional transpiration generator for simultaneous harvesting of electricity, freshwater and salt

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