CN104667895A - Coconut shell-based heavy metal adsorbent and preparation method thereof - Google Patents

Abstract

The invention discloses a coconut shell-based heavy metal adsorbent which is characterized by being prepared from the following raw materials in parts by weight: 20-30 parts of coconut shells, 5-10 parts of plant ash, 3-5 parts of peanut shells, 3-5 parts of xanthan gum, 1-2 parts of maltodextrin, 1-2 parts of malic acid, 1-2 parts of xylitol, 0.5-1 part of sodium polyacrylate, 0.1-0.2 part of sodium humate, 1-2 parts of sodium stearyl lactate, 6-8 parts of aids and 60-80 parts of water. The heavy metal adsorbent is prepared by effectively recycling agricultural fertilizers and has the characteristics of high metal binding and adsorbing capability and high adsorption capacity. Meanwhile, the heavy metal adsorbent has an effect of adsorbing and removing organic pollutants in the water body and is safe, environment-friendly, non-toxic and harmless, secondary pollution introduced into the environment is avoided in the wastewater treatment process, energy conservation and waste utilization are promoted, and the adsorbent is economical and practical.

Description

A kind of coconut husk basic weight metal absorbent and preparation method thereof

Technical field

The present invention relates to field of environmental improvement, be specifically related to a kind of coconut husk basic weight metal absorbent and preparation method thereof.

Background technology

Along with global economy and social development, environmental pollution is day by day serious, and wherein industrial wastewater is as main environomental pollution source, is a great problem perplexing countries in the world for a long time.Heavy metal ion in industrial wastewater has strong carcinogenic, teratogenesis, mutagenic effect, and constitute serious threat to health and ecological environment, the pollution therefore strictly controlling heavy metal wastewater thereby is most important.

Traditional process for treating heavy-metal waste water mainly contains chemical precipitation method, ion-exchange, membrane separation process etc., and these methods exist that investment is large, energy consumption is high, operating cost is high, easily produce secondary pollution problems usually, and application is restricted.Absorption method utilizes the pollutant in adsorbent water, thus the method for purifying liquid waste, and has simple to operate, feature fast and effectively, be widely used.How to obtain cheap, that high adsorption capacity, adsorptive selectivity are high adsorbent, become the focus of research and development.

Summary of the invention

The object of this invention is to provide a kind of coconut husk basic weight metal absorbent, raw material sources are extensive, cheap, and heavy metal adsorption is strong, and adsorption capacity is large, and safety and environmental protection, nontoxic, and Environmental compatibility is high.

The present invention is achieved by the following technical solutions:

A kind of coconut husk basic weight metal absorbent, it is obtained by the raw material of following weight parts:

Coconut husk 20-30, plant ash 5-10, peanut shell 3-5, xanthans 3-5, maltodextrin 1-2, malic acid 1-2, xylitol 1-2, Sodium Polyacrylate 0.5-1, sodium humate 0.1-0.2, stearoyl lactate 1-2, auxiliary agent 6-8, water 60-80;

Wherein auxiliary agent is made up of the raw material of following weight portion:

Fresh tea passes 20-30, fresh pine needle 3-5, fresh mulberry leaf 3-5, citric acid 2-4, oxalic acid 0.5-1, natrium citricum 1-2, sodium lauroyl sarcosine 0.5-1, water 80-100;

The preparation method of auxiliary agent is:

Fresh tea passes, fresh pine needle and fresh mulberry leaf are cleaned and pulverizes and mix with natrium citricum afterwards, co-ground is even, first add citric acid, oxalic acid and water 80-90 DEG C, 400-600r/min stirs 6-8h, add sodium lauroyl sarcosine 50-60 DEG C again, 800-1000r/min stirs 0.5-1h, cooled and filtered, get supernatant, to obtain final product.

A preparation method for coconut husk basic weight metal absorbent, comprises the following steps:

(1) raw material is taken by weight, first coconut husk and peanut shell are pulverized, mixing with plant ash and malic acid and grinding to add in water that 1/2-2/3 measures evenly, first ultrasonic process 10-15min, add again xanthans, xylitol and maltodextrin in 60-80 DEG C, stir 1-2h under 600-800r/min condition, after filtration, filter residue and drying is obtained modified powder, described sonification power is 200-300W;

(2) Sodium Polyacrylate, sodium humate and stearoyl lactate to be added in the water of surplus 50-60 DEG C, 800-1000r/min stirs 10-15min, slowly add modified powder and auxiliary agent and 400-600r/min stirs 1-2h at same temperature, 80-90 DEG C of drying after cooling, be ground to 100-200 order, obtain final product.

Advantage of the present invention is:

1. the present invention with waste material coconut husk, peanut shell etc. for primary raw material obtains heavy metal absorbent, by the improvement of recipe optimization, product is made to have corrupt split, high adsorption capacity, the feature that adsorption capacity is large, there is Adsorption effect to the organic pollution in water body simultaneously, energy-conserving profit waste, economical and practical;

2. safety and environmental protection, nontoxic, in environment, do not introduce secondary pollution in process waste water process.

Detailed description of the invention

Non-limiting examples of the present invention is as follows:

Embodiment 1: the preparation of coconut husk basic weight metal absorbent

A kind of coconut husk basic weight metal absorbent, is prepared from by the component raw material of following weight (kg):

Coconut husk 25, plant ash 8, peanut shell 4, xanthans 4, maltodextrin 1.5, malic acid 1.5, xylitol 1.5, Sodium Polyacrylate 0.8, sodium humate 0.15, stearoyl lactate 1.5, auxiliary agent 7, water 70;

Wherein, auxiliary agent is made up of the raw material of following weight portion:

Fresh tea passes 25, fresh pine needle 4, fresh mulberry leaf 4, citric acid 3, oxalic acid 0.8, natrium citricum 1.5, sodium lauroyl sarcosine 0.8, water 90;

The preparation method of auxiliary agent is:

Fresh tea passes, fresh pine needle and fresh mulberry leaf are cleaned and pulverize and mix with natrium citricum afterwards, co-ground is even, first adds 90 DEG C, citric acid, oxalic acid and water, 400r/min stirs 6h, add sodium lauroyl sarcosine 60 DEG C again, 1000r/min stirs 0.5h, cooled and filtered, gets supernatant, to obtain final product.

The preparation method of coconut husk basic weight metal absorbent comprises the following steps:

(1) raw material is taken by weight, first coconut husk and peanut shell are pulverized, mixing with plant ash and malic acid and grinding evenly adds in the water of 1/2 amount, first ultrasonic process 10min, add again xanthans, xylitol and maltodextrin in 80 DEG C, stir 1h under 600r/min condition, after filtration, filter residue and drying is obtained modified powder, described sonification power is 200W;

(2) Sodium Polyacrylate, sodium humate and stearoyl lactate to be added in the water of surplus 60 DEG C, 1000r/min stirs 15min, slowly add modified powder and auxiliary agent and 600r/min stirs 1h at same temperature, cool rear 80 DEG C of dryings, be ground to 200 orders, obtain final product.

Embodiment 2: the adsorption effect of heavy metal lead and copper

Take the adsorbent 0.5g in embodiment 1, joining 1L heavy metal lead ion concentration is in the water of 0.1g/L, and in absorption at room temperature 1h, detect the concentration of residual lead ion in solution, recording adsorbance is 37.2mg/g.

Take the adsorbent 0.5g in embodiment 1, joining 1L heavy metal copper ion concentration is in the water of 0.1g/L, and in absorption at room temperature 1h, detect the concentration of residual copper ion in solution, recording adsorbance is 44.5mg/g.

Claims (2)

1. a coconut husk basic weight metal absorbent, is characterized in that, it is obtained by the raw material of following weight parts:

Coconut husk 20-30, plant ash 5-10, peanut shell 3-5, xanthans 3-5, maltodextrin 1-2, malic acid 1-2, xylitol 1-2, Sodium Polyacrylate 0.5-1, sodium humate 0.1-0.2, stearoyl lactate 1-2, auxiliary agent 6-8, water 60-80;

Described auxiliary agent is made up of the raw material of following weight portion:

Fresh tea passes 20-30, fresh pine needle 3-5, fresh mulberry leaf 3-5, citric acid 2-4, oxalic acid 0.5-1, natrium citricum 1-2, sodium lauroyl sarcosine 0.5-1, water 80-100;

The preparation method of described auxiliary agent is:

Fresh tea passes, fresh pine needle and fresh mulberry leaf are cleaned and pulverizes and mix with natrium citricum afterwards, co-ground is even, first add citric acid, oxalic acid and water 80-90 DEG C, 400-600r/min stirs 6-8h, add sodium lauroyl sarcosine 50-60 DEG C again, 800-1000r/min stirs 0.5-1h, cooled and filtered, get supernatant, to obtain final product.

2. the preparation method of a kind of coconut husk basic weight metal absorbent according to claim 1, is characterized in that, comprise the following steps:

(1) raw material is taken by weight, first coconut husk and peanut shell are pulverized, mixing with plant ash and malic acid and grinding to add in water that 1/2-2/3 measures evenly, first ultrasonic process 10-15min, add again xanthans, xylitol and maltodextrin in 60-80 DEG C, stir 1-2h under 600-800r/min condition, after filtration, filter residue and drying is obtained modified powder, described sonification power is 200-300W;

(2) Sodium Polyacrylate, sodium humate and stearoyl lactate to be added in the water of surplus 50-60 DEG C, 800-1000r/min stirs 10-15min, slowly add modified powder and auxiliary agent and 400-600r/min stirs 1-2h at same temperature, 80-90 DEG C of drying after cooling, be ground to 100-200 order, obtain final product.