Larvicidal activity and structure activity relationship of cinnamoyl amides from Zanthoxylum armatum and their synthetic analogues against diamondback moth, Plutella xylostella

Cinnamoyl amides isolated from Zanthoxylum armatum (Rutaceae) and their synthetic analogues were tested for their insecticidal activity against the second instar larvae of diamondback moth, Plutella xylostella (L.) (Lepidoptera: Yponomeutidae) to determine the promising structures with insecticidal activity. Most of the test compounds showed promising activity against larvae of P. xylostella. However, the activities of different compounds varied depending on the presence of different substituents at various positions of both the aromatic rings A and B. Among the tested compounds, 8, N-(3-bromo-4-methoxyphenethyl)cinnamamide showed best larvicidal activity with an LC50 = 62.13 mg/L followed by 6, N-(3 ׳-bromophenethyl)cinnamamide (LC50=128.49 mg/L) and 2 N-(4 ׳-methoxyphenylethyl)cinnamamide (LC50 = 225.65 mg/L)

Kinetic and equilibrium studies on adsorption of cadmium from aqueous solution using Aesculus Indica seed shell

Present study has been carried out to evaluate feasibility of Aesculus indica seed shell (AISS) for the removal of Cd (II) ions from water. The prepared adsorbent has been characterized by Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS) and Fourier Transform Infrared Spectroscopy (FTIR). The adsorption influencing parameters such as dose (0.06 g), pH (6.0) and time (40 min) are optimized. Maximum adsorption capacity (qmax) is found to be 34.36 mg/g for Cd (II) ions adsorption onto AISS using Langmuir adsorption isotherm. The experimental data followed pseudo-second order kinetics for adsorption of Cd(II) onto AISS. Negative value of  H° indicates exothermic nature of reaction and adsorption decreases as temperature increases from 303 to 333 K. The negative value of S° show that there was no affinity of AISS and indicates decrease in randomness during adsorption process. The recovery and reuse processes for AISS can be continued up to 2 cycles. Thus, Aesculus indica seed shell can be used as an effective and low-cost adsorbent for removal of Cd (II) ions from aqueous solution

Kinetic and equilibrium studies on adsorption of cadmium from aqueous solution using Aesculus Indica seed shell

146-152Present study has been carried out to evaluate feasibility of Aesculus indica seed shell (AISS) for the removal of Cd (II) ions from water. The prepared adsorbent has been characterized by Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS) and Fourier Transform Infrared Spectroscopy (FTIR). The adsorption influencing parameters such as dose (0.06 g), pH (6.0) and time (40 min) are optimized. Maximum adsorption capacity (qmax) is found to be 34.36 mg/g for Cd (II) ions adsorption onto AISS using Langmuir adsorption isotherm. The experimental data followed pseudo-second order kinetics for adsorption of Cd(II) onto AISS. Negative value of  H° indicates exothermic nature of reaction and adsorption decreases as temperature increases from 303 to 333 K. The negative value of S° show that there was no affinity of AISS and indicates decrease in randomness during adsorption process. The recovery and reuse processes for AISS can be continued up to 2 cycles. Thus, Aesculus indica seed shell can be used as an effective and low-cost adsorbent for removal of Cd (II) ions from aqueous solution