PMID- 22575006
OWN - NLM
STAT- MEDLINE
DCOM- 20120823
LR  - 20191210
IS  - 1532-4109 (Electronic)
IS  - 0360-1234 (Linking)
VI  - 47
IP  - 8
DP  - 2012 Sep
TI  - Controlled release and retarded leaching of pesticides by encapsulating in 
      carboxymethyl chitosan /bentonite composite gel.
PG  - 795-803
LID - 10.1080/03601234.2012.676421 [doi]
AB  - A novel composite gel composed of carboxymethyl-chitosan (CM-chit) and bentonite 
      (H-bent) was used as the carrier for encapsulating atrazine and imidacloprid to 
      control their release in water and retard their leaching in soil. Strong 
      interactions between CM-chit and H-bent in the composite were confirmed by FT-IR, 
      and good dispersion of pesticides in the carrier was observed by SEM. According 
      to the results of release experiments in water, the CM-chit/H-bent composite 
      carrier showed double advantages of both encapsulation by the polymer and 
      sorption by the bentonite. The time taken for 50 % of active ingredients to be 
      released, t(5)(0), was prolonged to 572 h for atrazine and 24 h for imidacloprid, 
      respectively. The difference between the two pesticides on release behavior was 
      related to their hydrophobicity and water solubility. Leaching experiments 
      through a soil layer showed that this novel carrier reduced the amount of 
      pesticides available for leaching, and would be useful for diminishing the 
      environmental pollution of pesticides.
FAU - Li, Jianfa
AU  - Li J
AD  - Department of Chemistry, Shaoxing University, Zhejiang , China. ljf@usx.edu.cn
FAU - Yao, Jian
AU  - Yao J
FAU - Li, Yimin
AU  - Li Y
FAU - Shao, Ying
AU  - Shao Y
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - J Environ Sci Health B
JT  - Journal of environmental science and health. Part. B, Pesticides, food 
      contaminants, and agricultural wastes
JID - 7607167
RN  - 0 (Delayed-Action Preparations)
RN  - 0 (Drug Carriers)
RN  - 0 (Pesticides)
RN  - 0 (Soil)
RN  - 0 (carboxymethyl-chitosan)
RN  - 1302-78-9 (Bentonite)
RN  - 9012-76-4 (Chitosan)
SB  - IM
MH  - Bentonite/*chemistry
MH  - Chemistry, Pharmaceutical/*methods
MH  - Chitosan/*analogs & derivatives/chemistry
MH  - Delayed-Action Preparations/*chemistry/pharmacology
MH  - Drug Carriers/*chemistry
MH  - Pesticides/*chemistry/pharmacology
MH  - Soil/chemistry
EDAT- 2012/05/12 06:00
MHDA- 2012/08/24 06:00
CRDT- 2012/05/12 06:00
PHST- 2012/05/12 06:00 [entrez]
PHST- 2012/05/12 06:00 [pubmed]
PHST- 2012/08/24 06:00 [medline]
AID - 10.1080/03601234.2012.676421 [doi]
PST - ppublish
SO  - J Environ Sci Health B. 2012 Sep;47(8):795-803. doi: 
      10.1080/03601234.2012.676421.