A critical review of the production and advanced utilization of biochar via selective pyrolysis of lignocellulosic biomass.

Removal of heavy metals and dyes by clay-based adsorbents: From natural clays to 1D and 2D nano-composites

Insight into activated carbon from different kinds of chemical activating agents: A review.

Spent lithium ion battery (LIB) recovery is becoming quite urgent for environmental protection and social needs due to the rapid progress in LIB industries. However, recycling technologies cannot keep up with the exaltation of the LIB market. Technological improvement of processing spent batteries is necessary for industrial application. In this paper, spent LIB recovery processes are classified into three steps for discussion: gathering electrode materials, separating metal elements, and recycling separated metals. Detailed discussion and analysis are conducted in every step to provide beneficial advice for environmental protection and technology improvement of spent LIB recovery. Besides, the practical industrial recycling processes are introduced according to their advantages and disadvantages. And some recommendations are provided for existing problems. Based on current recycling technologies, the challenges for spent LIB recovery are summarized and discussed from technological and environmental perspectives. Furthermore, great effort should be made to promote the development of spent LIB recovery in future research as follows: (1) gathering high-purity electrode materials by mechanical pretreatment; (2) green metals leaching from electrode materials; (3) targeted extraction of metals from electrode materials.

Challenges to Future Development of Spent Lithium Ion Batteries Recovery from Environmental and Technological Perspectives

High adsorption of methylene blue by activated carbon prepared from phosphoric acid treated eucalyptus residue

Fluffy honeycomb-like activated carbon from popcorn with high surface area and well-developed porosity for ultra-high efficiency adsorption of organic dyes

Ceramic supported attapulgite-graphene oxide composite membrane for efficient removal of heavy metal contamination

The invention provides a preparation method of a graphene oxide/attapulgite/polyvinyl alcohol ceramic matrix composite membrane (GO/ATP/PVA composite membrane). A Al2O3 ceramic matrix is pretreated through 3-aminopropyl triethoxysilane (APTES), so that the binding force between the matrix and the composite membrane is increased, PVA is added to increase the swelling resistance of the composite membrane, and the GO/ATP/PVA composite membrane is prepared on the surface of the ceramic matrix through a vacuum filtration-low temperature drying method. The GO/ATP/PVA composite membrane has the advantages that the performance in the application of separating industrial wastewater is excellent, the preparation process is simple, the cost is low, and the preparation method is suitable for large-scale production.

Preparation method of graphene oxide/attapulgite/polyvinyl alcohol ceramic matrix composite membrane

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Fluffy honeycomb-like activated carbon from popcorn with high surface area and well-developed porosity for ultra-high efficiency adsorption of organic dyes

Ceramic supported attapulgite-graphene oxide composite membrane for efficient removal of heavy metal contamination

Preparation method of graphene oxide/attapulgite/polyvinyl alcohol ceramic matrix composite membrane