High Efficiency of the Removal Process of Pb(II) and Cu(II) Ions with the Use of Fly Ash from Incineration of Sunflower and Wood Waste Using the CFBC Technology

Abstract

In these research studies, fly ash (SW-FA) resulting from the incineration of sunflower (20%) and wood (80%) waste employing the circulating fluidized bed combustion (CFBC) technology was used to analyze the possibility of removing Pb(II) and Cu(II) ions in adsorption processes. Currently, great emphasis is placed on circular economy, zero waste or climate neutrality strategies. The use of low-cost SW-FA waste seems to fit well with pro-ecological, economic and energy-saving trends. Hence, this material was characterized by various techniques, such as granulation analysis, bulk density, SEM-EDX, XRD and XRF analysis, BET, BJH, thermogravimetry, zeta potential, SEM morphology and FT-IR spectrometry. As a result of the conducted research, the factors influencing the effectiveness of the adsorption process, such as adsorbent dosage, initial and equilibrium pH, initial metal concentration and contact time, were analyzed. The maximum removal efficiency were achieved at the level of 99.8% for Pb(II) and 99.6% for Cu(II), respectively. The kinetics analysis and isotherms showed that the pseudo-second-order equation and the Freundlich isotherm models better describe these processes. The experiments proved that SW-FA can act as an appropriate adsorbent for highly effective removal of lead and copper from wastewater and improvement of water quality.

Challenges and Priorities of Municipal Solid Waste Management in Cambodia

“…At the same time, the government of China set a target for domestic recycling of at least 35% by 2021 [ 105 ]. In 2020, the treatment of MSW in China relied heavily on landfill (61%) and incineration (35%), and the rest was recycling [ 106 ]. China has 69 incinerators, 324 controlled landfills, and 20 sanitary landfills [ 1 ].…”

Characterization and Optimization of Polymeric Bispicolamine Chelating Resin: Performance Evaluation via RSM Using Copper in Acid Liquors as a Model Substrate through Ion Exchange Method

“…PCBs are electronic devices (≥1.4 million tons discarded/year) [ 12 ] that contain metals (40%), polymer (30%) and ceramics (30%) [ 11 ], and the Cu concentration is higher than in nature in wastewater sources as compared with other metal types. There have been many studies investigating the use of different physicochemical methods in removal, reuse and recovery of copper from electronic waste, such as adsorption [ 13 , 14 , 15 , 16 ], incineration [ 17 ], landfill dumping [ 18 ], advanced/chemical oxidation [ 19 ] and precipitation [ 20 ]. Although such approaches could minimize the effect of electronics waste, they nonetheless have limitations [ 21 ] and lack cost-effectiveness.…”

Transformation of Solid Waste Management in China: Moving towards Sustainability through Digitalization-Based Circular Economy

“…Incineration is a primary treatment for hazardous waste and industrial waste in China. In 2020, almost 35% of the total MSW was disposed of by incineration, with 61% sent to landfill and only 4.4% recycled [28]. The low recycling rate was attributed to the absence of a secondary materials market and due to no formal initiatives for recycling in place.…”