Transforming Plastic Waste into Porous Carbon for Capturing Carbon Dioxide: A Review

Abstract

Plastic waste generation has increased dramatically every day. Indiscriminate disposal of plastic wastes can lead to several negative impacts on the environment, such as a significant increase in greenhouse gas emissions and water pollution. Therefore, it is wise to think of other alternatives to reduce plastic wastes without affecting the environment, including converting them into valuable products using effective methods such as pyrolysis. Products from the pyrolysis process encompassing of liquid, gas, and solid residues (char) can be turned into beneficial products, as the liquid product can be used as a commercial fuel and char can function as an excellent adsorbent. The char produced from plastic wastes could be modified to enhance carbon dioxide (CO2) adsorption performance. Therefore, this review attempts to compile relevant knowledge on the potential of adsorbents derived from waste plastic to capture CO2. This review was performed in accordance with PRISMA guidelines. The plastic-waste-derived activated carbon, as an adsorbent, could provide a promising method to solve the two environmental issues (CO2 emission and solid management) simultaneously. In addition, the future perspective on char derived from waste plastics is highlighted.

The Spatiotemporal Evolution and Prediction of Carbon Storage in the Yellow River Basin Based on the Major Function-Oriented Zone Planning

“…The high carbon storage area was mainly concentrated in the forest land and grassland in the center of the basin (south and middle of the national key ecological function zone and east of provincial key ecological function zone). A sub-high carbon storage area appeared in the national major grain producing zone of the eastern Yellow River Basin, which was dominated by cultivated land, and the carbon storage per unit area was close to the medium level of 8522.01 t/km 2 The distribution pattern of carbon storage in the Yellow River Basin was lower in the west and northwest, and higher in the central and northeast over the past 20 years (Figure 3). The low carbon storage area was mainly distributed at high altitude (west of the provincial key ecological function zone), where the native vegetation was destroyed, the desertification degree was high, and carbon storage capacity was weak.…”

“…Industrialization and urbanization have brought serious problems such as greenhouse gas emissions, water pollution, and land resource destruction, which have threatened the ecological background [1,2]. In particular, fossil-fuel combustion, deforestation, and irrational land use have made the "greenhouse effect" more and more serious, and carbon emission reduction and carbon neutrality have become international hot topics [3,4].…”

“…a repesents NDS, b repesents UES, c repesents EPS;[1][2][3][4][5][6][7][8] repesents national key development prioritized zone, provincial key development prioritized zone, national development optimized zone, provincial development optimized zone, national major grain pro-ducing zone, provincial major grain producing zone, national key ecological function zone, and provincial key ecological function zone, respectively. 3.4.…”

Sweep-Out of Tigecycline, Chlortetracycline, Oxytetracycline, and Doxycycline from Water by Carbon Nanoparticles Derived from Tissue Waste

“…The methods to remediate water with such contaminants encompass flocculation, chemical oxidation, ion exchange, and membranes. The spread of PhCs into seas, oceans, rivers, and drinking water indicates the failure of these conventional treatments [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. Hence, developing new processes is necessary to avoid the widespread of PhCs.…”

Plastic Waste Product Captures Carbon Dioxide in Nanometer Pores

“…At the same time, porous materials have been suggested as replacement for the expensive and energy amine-based CO 2 sorption . Porous carbon synthesis has been reported from polymers with high-fixed-carbon contents, such as polyacrylonitrile, polyethylene terephthalate, − and polyvinyl chloride. − However, generating porous carbon from low-fixed-carbon-content polymer wastes such as high-density polyethylene (HDPE), low-density polyethylene (LDPE), and polypropylene (PP), which are the main constituents in municipal PW, remains a challenge. Here, we introduce an alternative approach to PW pyrolysis, in which low-fixed-carbon-content PW polymers are pyrolyzed in the presence of a potassium salt to obtain porous carbon with high CO 2 capture capacity instead of the valueless carbon char from a conventional pyrolysis process.…”