PMID: 15224748Jul 1, 2004Paper

Cadmium removal from contaminated soil by tunable biopolymers

Environmental Science & Technology
Giridhar PrabhukumarWilfred Chen

Abstract

An elastin-like polypeptide (ELP) composed of a polyhistidine tail (ELPH12) was exploited as a tunable, metal-binding biopolymer with high affinity toward cadmium. By taking advantage of the property of ELPH12 to undergo a reversible thermal precipitation, easy recovery of the sequestered cadmium from contaminated water was demonstrated as the result of a simple temperature change. In this study, batch soil washing experiments were performed to evaluate the feasibility of using ELPH12 as an environmentally benign strategy for removing cadmium from contaminated soil. The stability constant (log KL) for the cadmium-ELPH12 complex was determined to be 6.8, a value similar to that reported for the biosurfactant rhamnolipid. Two washings with 1.25 mg/mL of ELPH12 were able to remove more than 55% of the bound cadmium as compared to only 8% removal with ELP containing no histidine tail or 21% removal using the same concentration of EDTA. Unlike rhamnolipid from Pseudomonas aeruginosa ATCC 9027, which adsorbs extensively to soil, less than 10% of ELPH12 was adsorbed under all soil washing conditions. As a result, a significantly lower concentration of ELPH12 (0.036 mM as compared to 5-10 mM of biosurfactants) was required to achieve s...Continue Reading

References

Jun 24, 1999·Journal of Hazardous Materials·R W Peters
Oct 24, 2003·Environmental Science & Technology·Jan KostalWilfred Chen
Sep 1, 1995·Environmental Science & Technology·D C HermanR M Miller

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Citations

Jan 8, 2008·Journal of the American Chemical Society·Wenhao LiuMoungi G Bawendi
Apr 1, 2009·International Journal of Molecular Sciences·Maureen A WallingJason R E Shepard
Dec 17, 2011·International Journal of Molecular Sciences·Hau-Ren ChenShashi B Atla
Nov 7, 2013·TheScientificWorldJournal·Jian Pu, Kensuke Fukushi
Nov 10, 2009·Trends in Biotechnology·Doreen M FlossJürgen Scheller
Jan 6, 2009·Materials Science & Engineering. R, Reports : a Review Journal·Dominic ChowAshutosh Chilkoti
Sep 21, 2011·Biotechnology Journal·Alessandra GirottiFrancisco J Arias
Feb 18, 2011·Bioengineered Bugs·Zhaohui XuJigar Patel
Feb 9, 2008·Critical Reviews in Microbiology·J TheronT E Cloete
May 9, 2007·Biotechnology and Bioengineering·U Loi LaoWilfred Chen
Nov 13, 2019·Scientific Reports·Jesica UrbinaLynn J Rothschild
Mar 23, 2007·Protein Engineering, Design & Selection : PEDS·Karuppiah ChockalingamScott Banta

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