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2013•Advanced materials researchOpen access

Study on Absorption of Cu2+ and Cd2+ in Wastewater by Modified Bentonite

Xiu Zhou, Fei Huang

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Abstract

In this study, the adsorption of Cu2+ and Cd2+ in wastewater by modified bentonite was investigated. The effect of adsorption adsorbent dosage, pH, time and temperature conditions, etc. on the adsorption was also studied. The results showed that adsorption of Cu2+ and Cd2+ in wastewater by modified bentonite increased with the increase of the adsorbent. When dosing quantity was 0.6g, the adsorption rate on Cu2+ and Cd2+ can reach respectively 92.4% and 87.3%. In 30 minutes, the adsorption rate on Cu2+ and Cd2+ can achieve above 93.3% and above 91.8% respectively closing to adsorption balance. When pH of the system is between 6-7, adsorption is to equal balance, the adsorption rate on Cu2+ and Cd2+ can reach above 92%. When the temperature is 30°C, absorption rate on Cu2+ and Cd2+ in wastewater by modified bentonite is 93.6% and 91.8%, the adsorption effect is the best.

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What this paper is about

In this study, the adsorption of Cu2+ and Cd2+ in wastewater by modified bentonite was investigated. The effect of adsorption adsorbent dosage, pH, time and temperature conditions, etc. on the adsorption was also studied. The results showed that adsorption of Cu2+ and Cd2+ in wastewater by modified bentonite increased with the increase of the adsorbent. When dosing quantity was 0.6g, the adsorption rate on Cu2+ and Cd2+ can reach respectively 92.4% and 87.3%. In 30 minutes, the adsorption rate on Cu2+ and Cd2+ can achieve above 93.3% and above 91.8% respectively closing to adsorption balance. When pH of the system is between 6-7, adsorption is to equal balance, the adsorption rate on Cu2+ and Cd2+ can reach above 92%. When the temperature is 30°C, absorption rate on Cu2+ and Cd2+ in wastewater by modified bentonite is 93.6% and 91.8%, the adsorption effect is the best.

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Available abstract

In this study, the adsorption of Cu2+ and Cd2+ in wastewater by modified bentonite was investigated. The effect of adsorption adsorbent dosage, pH, time and temperature conditions, etc. on the adsorption was also studied. The results showed that adsorption of Cu2+ and Cd2+ in wastewater by modified bentonite increased with the increase of the adsorbent. When dosing quantity was 0.6g, the adsorption rate on Cu2+ and Cd2+ can reach respectively 92.4% and 87.3%. In 30 minutes, the adsorption rate on Cu2+ and Cd2+ can achieve above 93.3% and above 91.8% respectively closing to adsorption balance. When pH of the system is between 6-7, adsorption is to equal balance, the adsorption rate on Cu2+ and Cd2+ can reach above 92%. When the temperature is 30°C, absorption rate on Cu2+ and Cd2+ in wastewater by modified bentonite is 93.6% and 91.8%, the adsorption effect is the best.

Key concepts: Bentonite, Adsorption, Wastewater, Chemistry, Nuclear chemistry, Absorption rate, Absorption (acoustics), Inorganic chemistry

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