Hazardous Waste Pollution Prevention Using Clay with Admixtures

Abstract

Landfill is the most commonly used method for disposal of waste materials since it is one of the least expensive methods. In order to dispose of any hazardous material to a landfill, a liner is used, which protects the underlying land and groundwater since it acts as a barrier to fluid movement. Of the various methods available for providing improved and more effective properties of landfills, methods involving the use of bentonite, cement, lime, gypsum, etc., have been explored in the laboratory. The aim is to overcome the problem and deficiencies of the existing liners. It is observed from the experimental results that the metal concentrations of the input waste solution can be reduced to 80 -98% using a soil-cement admixture, 60 -95% using a soil-gypsum mixture, 45 -95% using a soil-bentonite mixture, 50 -90% for soil, 35 -80% using a soil-lime mixture, as liner materials. The permeation rate of different metals through the different soil-admixture media depends on various factors. A simple mathematical treatment of the phenomenon related to the permeation of liquid through the admixture of the clay and other components has been developed. The experimental results show satisfactory agreement with the predictions.

Organoclays as Sorbent Material for Phenolic Compounds: A Review

“…Quest for new adsorbing material has directed several scientists to search for more efficient sorbent material for environmental remediation applications [15][16][17] for e.g. zeolites [4], ionic liquid [18], fly ash [19], rice husk [20], soil [21][22][23], clays [24][25][26][27][28][29][30][31], and composite materials [32,33].…”

“…Nowadays the most promising way that is chiefly employed for the sorption of many organic and inorganic compounds in synthetic and industrial effluents is the use of naturally occurring clay minerals . Naturally occurring clay minerals are phyllosilicate groups.…”

Removing Cd2+ from water and wastewater by blowy sand; the effects of total hardness and pH

“…These metals have commonly toxic effect on human's (and animal's) body and they cannot be decomposed to the safe materials. The main source of these metals is industrial sewage [2,3]. In countries with dry climate, home and industrial sewages can be used for irrigation of farms.…”

Investigation of the Possibility of Copper Removal from Industrial Leachate by Raw and Calcined Phosphogypsum: D‐Optimal and Taguchi Designs

“…There have also been increasing interests of removing the harmful effects of different heavy metals, which are generally present in industrial waste. An experimental study to decrease the negative effects of metal ions by using bentonite, cement, lime, and gypsum was studied and the experimental system was modeled mathematically in 26. Zn(II) removal was examined by using tea factory waste from industrial leachate and demonstrated that Zn(II) adsorption on tea factory waste followed pseudo‐second‐order‐kinetics in 27.…”