Reuse of waste sludge from water treatment plants and fly ash for manufacturing of adobe bricks.

Reuse of sludge from a water treatment plant and fly ash for the manufacturing of adobe brick is a feasible approach for practical applications due to the numerous benefits from the cost savings of construction materials and the reduction of environmental pollution. In this study, sludge from a groundwater treatment plant and fly ash from a thermal power plant were used as alternative aggregates to replace clay, a traditional component for brick making. The main objective of this study is to produce adobe bricks by using hydraulic press technology.

A review on the emerging applications of cellulose, cellulose derivatives and nanocellulose in carbon capture.

Carbon capture can be implemented at a large scale only if the CO selective materials are abundantly available at low cost. Since the sustainable requirement also elevated, the low-cost and biodegradable cellulosic materials are developed into CO selective adsorbent and membranes recently. The applications of cellulose, cellulosic derivatives and nanocellulose as CO selective adsorbents and membranes are reviewed here.

Bioelectrochemical technology for recovery of silver from contaminated aqueous solution: a review.

A large amount of silver-rich wastewater is generated from different industrial processes. This wastewater is not considered a waste, but a valuable source for recovery due to the precious silver (Ag). Previous studies have used traditional methods such as membrane filtration, electrolysis, chemical precipitation, electrochemical, and cementation for Ag recovery.

Electrochemical reduction of different Ag(i)-containing solutions in bioelectrochemical systems for recovery of silver and simultaneous power generation.

In this study, dual-chamber bioelectrochemical reactors (, R1, R2, R3, and R4) were employed to investigate the Ag recovery and electricity production from different Ag(i)-containing artificial wastewaters (, Ag solution, [Ag(NH)] and [Ag(SO)] complexes, and mixed metal solution). Results showed that the electrochemical reductions of Ag(i) ions in all reactors were rapid reactions. The reaction rate in R1 was the fastest.

Factors influencing silver recovery and power generation in bio-electrochemical reactors.

The recovery of silver from Ag solution coupled with power generation was investigated in bio-electrochemical system (BES). In this system, chemical energy existing in the organic matter in the anode chamber can be converted biologically to electrical energy which can be used for the reduction of Ag ions in the cathode chamber. Results showed that type of substrate influenced the metabolic pathway and affected the cell voltage progression, and columbic efficiency.